| 1. |
- Arcelli, Carlo, et al.
(author)
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Computing and analysing convex deficiencies to characterise 3D complex objects
- 2005
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In: Image and Vision Computing: Discrete Geometry for Computer Imagery. ; 23:2, s. 203-211
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Journal article (peer-reviewed)abstract
- Entities such as object components, cavities, tunnels and concavities in 3D digital images can be useful in the framework of object analysis. For each object component, we first identify its convex deficiencies, by subtracting the object component from a covering polyhedron approximating the convex hull. Watershed segmentation is then used to decompose complex convex deficiencies into simpler parts, corresponding to individual cavities, concavities and tunnels of the object component. These entities are finally described by means of a representation system accounting for the shape features characterising them.
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| 2. |
- Brolin Låftman, Sara, et al.
(author)
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Problematic alcohol use in the family and adolescents’ stress-related complaints
- 2021
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In: European Journal of Public Health. - : Oxford University Press (OUP).
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Conference paper (other academic/artistic)abstract
- Background. A non-negligible proportion of children grow up in families where problematic alcohol use is present. From a resilience perspective and for the implementation of effective interventions, it is relevant to examine to what extent favourable conditions in other contexts may buffer against such family adversities. The aim of the current study was to examine the relationship between problematic familial alcohol use and offspring stress-related complaints. Another aim was to explore whether teacher ratings of the school's degree of student focus can buffer against negative health consequences of problem drinking at home.Methods. Data were drawn from four cross-sectional surveys conducted in 2014 and in 2016 among 8,728 students (∼15-16 years) and 2,024 teachers in 147 Stockholm senior-level school units, with linked school-level register information. Stress-related complaints were measured from students' reports on the weekly co-occurrence of stomach-ache and headache. Teachers' ratings of the school's student focus were measured by an index based on four items which was aggregated to the school level. Student-level sociodemographic characteristics were included as control variables along with the schools' composition and student-teacher ratio. Two-level binary logistic regression analyses were performed.Results. Problematic familial alcohol use was associated with an increased likelihood of stress-related complaints among students (OR 1.74, 95% CI 1.44-2.10). The cross-level interaction revealed that this association was weaker among students in schools with higher levels of student focus.Conclusions. The study showed that the association between problematic familial alcohol use and students' stress-related complaints was less pronounced in schools with higher teacher ratings of student focus. This finding indicates that favourable conditions in schools can buffer against problematic conditions in the family, thus serving a compensatory role.Key messages. Students reporting problematic familial alcohol use were more likely to suffer from stress-related complaints.High teacher ratings of the school’s student focus buffered against the association between problematic familial alcohol use and stress-related complaints.
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| 3. |
- Brolin Låftman, Sara, et al.
(author)
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School ethos and adolescent gambling : a multilevel study of upper secondary schools in Stockholm, Sweden
- 2020
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In: BMC Public Health. - : Springer Science and Business Media LLC. - 1471-2458. ; 20:1
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Journal article (peer-reviewed)abstract
- Background: Gambling is not uncommon among adolescents, and a non-trivial minority has serious problems with gambling. Therefore, enhanced knowledge about factors that may prevent against problematic gambling among youth is needed. Prior research has shown that a strong school ethos, which can be defined as a set of attitudes and values pervading at a school, is associated with a lower inclination among students to engage in various risk behaviours. Knowledge about the link between school ethos and adolescent gambling is however scarce. The aim of the study was to investigate the association between teacher-rated school ethos and student-reported gambling and risk gambling, when controlling also for sociodemographic characteristics at the student- and the school-level.Methods: Data from two separate cross-sectional surveys were combined. The Stockholm School Survey (SSS) was performed among 5123 students (aged 17–18years) in 46 upper secondary schools, and the Stockholm Teacher Survey (STS) was carried out among 1061 teachers in the same schools. School ethos was measured by an index based on teachers’ ratings of 12 items in the STS. Adolescent gambling and risk gambling were based on a set of single items in the SSS. Sociodemographic characteristics at the student-level were measured by student-reported information from the SSS. Information on sociodemographic characteristics at the school-level was retrieved from administrative registers. The statistical method was multilevel regression analysis. Two-level binary logistic regression models were performed.Results: The analyses showed that higher teacher ratings of the school’s ethos were associated with a lower likelihood of gambling and risk gambling among students, when adjusting also for student- and school-level sociodemographic characteristics.Conclusions: This study showed that school ethos was inversely associated with students’ inclination to engage in gambling and in risk gambling. In more general terms, the study provides evidence that schools’ values and norms as reflected by the teachers’ ratings of their school’s ethos have the potential to counteract unwanted behaviours among the students.
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| 4. |
- Chauca Strand, Gabriella, 1995, et al.
(author)
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Assessment of the clinical and cost-effectiveness evidence in the reimbursement decisions of new cancer drugs
- 2022
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In: ESMO Open. - : Elsevier. - 2059-7029. ; 7:5
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Journal article (peer-reviewed)abstract
- Background: This study aimed to describe the clinical and cost-effectiveness evidence supporting reimbursementdecisions of new cancer drugs and analyze the influence of trial characteristics and the cost per quality-adjusted lifeyears (QALYs) on the likelihood of reimbursement in Sweden.Patients and methods: Data were extracted from all appraisal dossiers for new cancer drugs seeking reimbursement inSweden and claiming added therapeutical value between the years 2010 and 2020. The data were analyzed usingdescriptive statistics, and logistic regression models were also used with the cost per QALY, study design,comparator, and evidence on final outcomes in the clinical trials as predictors of reimbursement.Results: All 60 included appraisals were based on trial evidence that assessed at least one final outcome (overallsurvival [OS] or quality of life [QoL]), although rarely as a primary outcome. Of the appraisals with a final decision(n ¼ 58), 79% were approved for reimbursement. Among the reimbursed drugs, only half had trial evidencedemonstrating improved OS or QoL. Only one drug had trial evidence supporting improvements in both OS andQoL. The average cost per QALY for reimbursed cancer drugs was estimated to be 748 560 SEK (V73 583). A highercost per QALY was found to decrease the likelihood of reimbursement by 9.4% for every 100 000 SEK (V9830)higher cost per QALY (P ¼ 0.03). For cost-effectiveness models without direct evidence of improvements in finaloutcomes, a larger QALY gain was observed compared with those with evidence mainly relying on intermediate andsurrogate outcomes.Conclusions: There are substantial uncertainties in the clinical and cost-effectiveness evidence underlyingreimbursement decisions of new cancer drugs. Decision makers should be cautious of the limited evidence onpatient-centered outcomes and the implications of allocating resources to expensive treatments with uncertainvalue for money.
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| 5. |
- Chauca Strand, Gabriella, 1995, et al.
(author)
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Cancer Drugs Reimbursed with Limited Evidence on Overall Survival and Quality of Life : Do Follow-Up Studies Confirm Patient Benefits?
- 2023
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In: Clinical drug investigation. - : Springer. - 1173-2563 .- 1179-1918. ; 43:8, s. 621-633
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Journal article (peer-reviewed)abstract
- Background and ObjectiveCancer drug costs have increased considerably within healthcare systems, but many drugs lack quality-of-life (QoL) and overall survival (OS) data at the time of reimbursement approval. This study aimed to review the extent of subsequent literature documenting improvements in OS and QoL for cancer drug indications where no such evidence existed at the time of reimbursement approval.MethodsDrug indications with claims of added therapeutical value but a lack of evidence on OS and QoL that were reimbursed between 2010 and 2020 in Sweden were included for review. Searches were conducted in PubMed and ClinicalTrial.gov for randomized controlled trials examining OS and QoL.ResultsOf the 22 included drug indications, seven were found to have at least one trial with conclusive evidence of improvements in OS or QoL after a mean follow-up of 6.6 years. The remaining 15 drug indications either lacked subsequent randomized controlled trial data on OS or QoL (n = 6) or showed no statistically significant improvements (n = 9). Only one drug demonstrated evidence of improvement in both OS and QoL for its indication.ConclusionsA considerable share of reimbursed cancer drug indications continue to lack evidence of improvement in both OS and QoL. With limited healthcare resources and an increasing cancer burden, third-party payers have strong incentives to require additional post-reimbursement data to confirm any improvements in OS and QoL.
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| 6. |
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| 7. |
- Eriksson, Gabriella, 1983-, et al.
(author)
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Driving Faster or Slower : Biased Judgments of Fuel Consumption at Changing Speeds
- 2012. - 1st edition
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In: Advances in Human Aspects of Road and Rail Transportation. - Boca Raton : CRC Press. - 9780429108624
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Book chapter (peer-reviewed)abstract
- Reduced fuel consumption by lower speeds on roads would reduce emissions. Do drivers, who choose vehicle speed, realize the gain in fuel of a reduced speed? Judgments of fuel consumption at increasing and decreasing speeds were made by professional truck drivers and student groups when they were not driving. For decreases in speed, truck drivers underestimated fuel saved significantly. Engineering and psychology university students’ judgments also tended to underestimate fuel saved but not statistically different from the correct values. For increases in speed, the truck drivers judged the fuel they would waste close to correctly. The psychology student group overestimated the fuel wasted following an increase in driving speed as did the engineering students but only for speed increases greater than 30 km/h. The results indicate that eco driving systems need to support drivers’ judgments of fuel saved or lost if they change their driving speed.
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| 8. |
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| 9. |
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| 10. |
- Granroth, Sari, et al.
(author)
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Investigation of interface properties of Ni/Cu multilayers by high kinetic energy photoelectron spectroscopy
- 2009
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In: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121 .- 1550-235X. ; 80:9
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Journal article (peer-reviewed)abstract
- High kinetic-energy photoelectron spectroscopy (HIKE) or hard x-ray photoelectron spectroscopy has been used to investigate the alloying of Ni/Cu (100) multilayers. Relative intensities of the corelevels and their chemical shifts derived from binding energy changes are shown to give precise information on physicochemical properties and quality of the buried layers. Interface roughening, including kinetic properties such as the rate of alloying, and temperature effects on the processes can be analyzed quantitatively. Using HIKE, we have been able to precisely follow the deterioration of the multilayer structure at the atomic scale and observe the diffusion of the capping layer into the multilayer structure which in turn is found to lead to a segregation in the ternary system. This is of great importance for future research on multilayered systems of this kind. Our experimental data are supplemented by first-principles theoretical calculations of the core-level shifts for a ternary alloy to allow for modeling of the influence of capping materials on the chemical shifts.
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| 11. |
- Hober, Sophia, Professor, 1965-, et al.
(author)
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Systematic evaluation of SARS-CoV-2 antigens enables a highly specific and sensitive multiplex serological COVID-19 assay
- 2021
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In: Clinical & Translational Immunology. - : Wiley. - 2050-0068. ; 10:7
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Journal article (peer-reviewed)abstract
- Objective. The COVID-19 pandemic poses an immense need for accurate, sensitive and high-throughput clinical tests, and serological assays are needed for both overarching epidemiological studies and evaluating vaccines. Here, we present the development and validation of a high-throughput multiplex bead-based serological assay. Methods. More than 100 representations of SARS-CoV-2 proteins were included for initial evaluation, including antigens produced in bacterial and mammalian hosts as well as synthetic peptides. The five best-performing antigens, three representing the spike glycoprotein and two representing the nucleocapsid protein, were further evaluated for detection of IgG antibodies in samples from 331 COVID-19 patients and convalescents, and in 2090 negative controls sampled before 2020. Results. Three antigens were finally selected, represented by a soluble trimeric form and the S1-domain of the spike glycoprotein as well as by the C-terminal domain of the nucleocapsid. The sensitivity for these three antigens individually was found to be 99.7%, 99.1% and 99.7%, and the specificity was found to be 98.1%, 98.7% and 95.7%. The best assay performance was although achieved when utilising two antigens in combination, enabling a sensitivity of up to 99.7% combined with a specificity of 100%. Requiring any two of the three antigens resulted in a sensitivity of 99.7% and a specificity of 99.4%. Conclusion. These observations demonstrate that a serological test based on a combination of several SARS-CoV-2 antigens enables a highly specific and sensitive multiplex serological COVID-19 assay.
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| 12. |
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| 13. |
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| 14. |
- Jacobsson, Amanda, et al.
(author)
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”Ambulanssjukvården behöver genomgripande förändringar”
- 2021
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In: Dagens Medicin. - : Dagens Medicin. - 1402-1943. ; :2021-06-23
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Journal article (pop. science, debate, etc.)abstract
- Debattörer från Ambulance health research network vill se en nationell ledningsstruktur, ökad evidens för vården, akademisk kompetens i ledningsfunktioner samt en nationell utbildnings- och kompetensstandard.
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| 15. |
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| 16. |
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| 17. |
- Olsson, Martin, et al.
(author)
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Educational intervention in triage with the Swedish triage scale RETTS©, with focus on specialist nurse students in ambulance and emergency care – A cross-sectional study
- 2022
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In: International Emergency Nursing. - : Elsevier. - 1755-599X .- 1878-013X. ; 63
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Journal article (peer-reviewed)abstract
- AimTo determine the reliability of application of the RETTS© triage scale after an educational intervention using paper-based scenarios in emergency care education.BackgroundKnowledge about and education in triage are important factors in triagescale implementation. Presenting students with a large number of triage scenarios is a common part of triage education.MethodsIn this prospective cross-sectional study at two universities students undergoing education in emergency care used RETTS© to assess triage level in 46 paper-based scenarios.Results57 students in the study made 2590 final triage decisions. Fleiss Kappa for final triage was 0.411 which is in the lower range of moderate agreement. In 25 of 46 (53.4%) scenarios, final triage levels did not agree about whether the case was stable or unstable.Conclusion/ImplicationsApplication of the RETTS© triage scale after an educational intervention with paper-based simulation in emergency care education resulted in moderate agreement about the final levels of triage.
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| 18. |
- Papaioannou, A., et al.
(author)
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Stress-induced tyrosine phosphorylation of RtcB modulates IRE1 activity and signaling outputs
- 2022
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In: Life science alliance. - : Life Science Alliance, LLC. - 2575-1077. ; 5:5
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Journal article (peer-reviewed)abstract
- ER stress is mediated by three sensors and the most evolutionary conserved IRE1α signals through its cytosolic kinase and endoribonuclease (RNase) activities. IRE1α RNase activity can either catalyze the initial step of XBP1 mRNA unconventional splicing or degrade a number of RNAs through regulated IRE1-dependent decay. Until now, the biochemical and biological outputs of IRE1α RNase activity have been well documented; however, the precise mechanisms controlling whether IRE1α signaling is adaptive or pro-death (terminal) remain unclear. We investigated those mechanisms and hypothesized that XBP1 mRNA splicing and regulated IRE1-dependent decay activity could be co-regulated by the IRE1α RNase regulatory network. We identified that RtcB, the tRNA ligase responsible for XBP1 mRNA splicing, is tyrosine-phosphorylated by c-Abl and dephosphorylated by PTP1B. Moreover, we show that the phosphorylation of RtcB at Y306 perturbs RtcB interaction with IRE1α, thereby attenuating XBP1 mRNA splicing. Our results demonstrate that the IRE1α RNase regulatory network is dynamically fine-tuned by tyrosine kinases and phosphatases upon various stresses and that the extent of RtcB tyrosine phosphorylation determines cell adaptive or death outputs. © 2022 Papaioannou et al.
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| 19. |
- Sanniti di Baja, Gabriella, et al.
(author)
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A new shape descriptor for surfaces in 3D images
- 2002
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In: Pattern Recognition Letters. ; 23:6, s. 703-711
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Journal article (peer-reviewed)abstract
- We introduce a linear shape descriptor for (open) surfaces in 3D images. To extract the shape descriptor, the border of the surface is first identified. Then, the distance transform of the surface is computed, where each voxel in the surface is labelled w
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| 20. |
- Svensson, Gabriella, et al.
(author)
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Hur står det till med magen …? : En kartläggning av förstoppningsproblematiken på några kommunala äldreboenden
- 2004
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Reports (other academic/artistic)abstract
- Förstoppning är ett vardagligt problem inom äldreomsorgen. Trots det är det inte så noga undersökt och det kan finnas flera orsaker till detta. Dels är det ett oglamoröst ämne och dels finns det metodologiska svårigheter eftersom det finns en mängd orsaksvariabler till förstoppning. Inte heller inom vårdutbildningar ägnas speciellt mycket tid till förstoppningsproblematiken. Det finns inget som tyder på att det är det normala åldrandet som påverkar att äldre blir mer förstoppade utan det är andra faktorer som tex. sjukdom, läkemedel, kost, vätska och inaktivitet som inverkar. Dessa faktorer är påverkbara i olika grad och det är viktigt att inte bara slentrianmässigt ge de äldre laxermedel. Man bör alltså även med ickefarmakologiska metoder försöka förebygga och motverka förstoppning även om många äldre vårdtagare samtidigt också för längre eller kortare tid måste inta laxermedel. I denna undersökning ingick två äldreboenden och urvalet bestod av de vårdtagare som accepterade att delta (65). Ett frågeformulär ifylldes tillsammans med vårdtagarens kontaktperson. Resultatet visar att det är svårt att utpeka någon enstaka variabel som en speciell markör för risk för förstoppning. Ungefär hälften av vårdtagarna uppgavs vara förstoppade av och till trots att tre fjärdedelar använde laxermedel på stående ordination. Nästan alla (95%) hade en eller flera diagnoser som förknippas med risk för förstoppning. Äldre vårdtagare speciellt de som bor på äldreboende har ofta många läkemedel. Många av dessa har förstoppning som möjlig biverkan. Drygt 85% av vårdtagarna hade någon medicin på stående ordination som kan ge förstoppning som biverkan. Många vårdtagare fick i sig för lite vätska och fibrer men var ändå inte mer förstoppade än de som åt mer fibrer och drack mera vätska. Detta kan bero på att de använder laxermedel. Mer än hälften (57%) var avföringsinkontinenta och tre fjärdedelar var urininkontinenta. Det finns risk att dessa vårdtagare inte får komma till toaletten regelbundet på grund av att de bär blöja. Det var 17% som uppgavs inte dagligen komma till toaletten. Alla utom en vårdtagare hade egen toalett vilket säkert underlättar toalettbesöken dels genom att de inte behöver känna stress att andra vårdtagare behöver komma dit, dels genom att toaletterna lättare kan anpassas till den enskilde vårdtagaren. Tre fjärdedelar använde dagligen laxermedel och hälften hade laxermedel vid behov. Det var i stort sett de som redan hade laxermedel på stående ordination som även hade det vid behov. De laxermedel som användes på stående ordination var framför allt osmotiska medel som Movicol och Laktulos vilket kan anses lämpligt till äldre personer. Många använder dessutom katrinplommon och/eller extra fibrer. I vilken form det ges verkar vara avdelningsbundet. Några andra metoder för att förebygga förstoppning hos de enskilda vårdtagarna uppgavs endast i ett fåtal fall. Det är viktigt att inte nöja sig med att enbart ge de äldre laxermedel när magen krånglar utan att hela tiden vara steget före och försöka motverka förstoppning på alla plan utifrån den enskilde individens riskfaktorer. Likaså är det viktigt att när det så krävs ge ett för individen lämpligt laxermedel i rätt dosering. Både förstoppningen i sig och effekten av laxermedel kan ge problem som inverkar på livskvaliteten.
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| 21. |
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| 22. |
- Svensson, Gabriella, et al.
(author)
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Särskilt boende för äldre under kortare tid
- 2002
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Reports (other academic/artistic)abstract
- Kunskapen om korttidsvårdens funktion, innehåll och kvalitet är ytterst begränsad såväl internationellt som när det gäller svenska förhållanden. För att belysa oklarheter som finns i korttidsvårdens innehåll, tog Socialstyrelsen initiativ till en undersökning våren 2002. Syftet med denna kartläggning av korttidsvården har varit att söka kunskap om det kommunala korttidsboendets roll och funktion samt undersöka vilka vårdtagare som använder korttidsvårdsplatserna. Undersökningen bygger på ett urval äldreboenden eller enheter från en tidigare undersökning av kommunala särskilda boendeformer. De kommuner som i denna tidigare undersökning uppgivit att de hade speciella korttidsboenden, eller enheter med korttidsvård, utgjorde urvalet. Undersökningen kom att omfatta 23 enheter från 17 olika kommuner. På enheterna var 339 personer inskrivna för korttidsvård och för 315 av dessa har uppgifter lämnats. Resultatet av undersökningen visade att det vanligen krävs ett biståndsbeslut för att få en plats i korttidsvården men att en korttidsvårdsplats i enstaka fall, kan beläggas av en sjuksköterska. Vid denna kartläggning var 87 procent av platserna belagda. När det gäller avlösningsvård är det ju naturligt att de flesta vårdtagarna kommer till korttidsvården via hemmet. Vi såg att rehabiliteringsvårdtagarna företrädelsevis kom från sjukhuset, men att det inte var så stor skillnad när det gällde övriga orsaker. Bland de som hade korttidsvård av organisatoriska skäl (framförallt i väntan på permanent plats i särskilt boende) var det i stort sett lika vanligt att vårdtagarna kom från hemmet som från sjukhuset. Att korttidsvården primärt skulle fylla en funktion för de medicinskt färdigbehandlade får inget direkt stöd i denna undersökning. Vårdtagarnas fysiska och psykiska status ställer stora krav på vårdpersonalen. Det var en stor andel av vårdtagarna som hade vårdkrävande diagnoser som hjärt-kärlsjukdomar och neurologiska sjukdomar. Detta innebar att ADL förmågan var starkt begränsad för flera av vårdtagarna. Personalen måste assistera två tredjedelar av vårdtagarna vid toalettbesök, hjälpa 40 procent vid förflyttning och assistera nästan lika många vårdtagare mer eller mindre vid måltiderna. Klart över hälften hade i denna undersökning någon form av minnesstörning och en femtedel hade någon demensdiagnos. Många av de äldre vårdtagarna hade ett stort antal regelbundet ordinerade läkemedel. Det ställer krav på läkarmedverkan i korttidsvården. De kriterier som fanns för bistånd genom korttidsvården var inte särskilt specifika vilket tyder på att korttidsboendena inte hade en speciell inriktning. Enheter med inriktning mot en specialitet skulle troligen kunna ge en bättre vård och kunna ha en mer kompetent personal för sin specialitet. Vid en blandad korttidsvård kan det också vara svårt att motivera varför vården skiljer sig åt mellan olika vårdtagare t.ex. varför en vårdtagare får rehabilitering men inte en annan. De som använder avlösningsvård och rehabilitering tycks också vara de som utnyttjar korttidsvården under kortast tid, vilket skulle kunna vara en fördel vid en specialisering av vården. Detta skulle kunna användas som argument för att vika begreppet korttidsvård för dessa vårdformer men de kännetecknas också väl av sitt innehåll tjänar sannolikt i längden på att utvecklas som rehabiliteringsverksamhet respektive avlösningsvård. Kanske kunde man samla avlösning och rehabilitering under samma tak. Sammanfattningsvis kan alltså en specialisering av korttidsvården vara önskvärd ur kvalitetssynpunkt. En sådan specialisering ställer större krav på målsättning för vistelsen för individen och är sannolikt nödvändig för att garantera tillräckliga kvaliteter i vården.
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| 23. |
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| 24. |
- Svensson, Mikael, 1980, et al.
(author)
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Analyses of quality of life in cancer drug trials - a review of measurements and analytical choices in post-reimbursement studies
- 2024
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In: BMC Cancer. - : BioMed Central (BMC). - 1471-2407. ; 24:1
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Research review (peer-reviewed)abstract
- Objectives: For drugs reimbursed with limited evidence of patient benefits, confirmatory evidence of overall survival (OS) and quality of life (QoL) benefits is important. For QoL data to serve as valuable input to patients and decision-makers, it must be measured and analyzed using appropriate methods. We aimed to assess the measurement and analyses of post-reimbursement QoL data for cancer drugs introduced in Swedish healthcare with limited evidence at the time of reimbursement. Methods: We reviewed any published post-reimbursement trial data on QoL for cancer drugs reimbursed in Sweden between 2010 and 2020 with limited evidence of improvement in QoL and OS benefits at the time of reimbursement. We extracted information on the instruments used, frequency of measurement, extent of missing data, statistical approaches, and the use of pre-registration and study protocols. Results: Out of 22 drugs satisfying our inclusion criteria, we identified published QoL data for 12 drugs in 22 studies covering multiple cancer types. The most frequently used QoL instruments were EORTC QLQ-C30 and EQ-5D-3/5L. We identified three areas needing improvement in QoL measurement and analysis: (i) motivation for the frequency of measurements, (ii) handling of the substantial missing data problem, and (iii) inclusion and adherence to QoL analyses in clinical trial pre-registration and study protocols. Conclusions: Our review shows that the measurements and analysis of QoL data in our sample of cancer trials covering drugs initially reimbursed without any confirmed QoL or OS evidence have significant room for improvement. The increasing use of QoL assessments must be accompanied by a stricter adherence to best-practice guidelines to provide valuable input to patients and decision-makers.
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| 25. |
- Svensson, Stina and Sanniti di Baja, Gabriella
(author)
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Simplifying curve skeletons in volume images
- 2003
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In: Computer Vision and Image Understanding. ; 90, s. 242-257
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Journal article (other academic/artistic)abstract
- The curve skeleton of a 3D solid object provides a useful tool for shape
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| 26. |
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| 27. |
- Svensson, Stina, et al.
(author)
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Curve skeletonization of surface-like objects in 3D images guided by voxel classification
- 2002
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In: Pattern Recognition Letters. - 0167-8655 .- 1872-7344. ; 23:12, s. 1419-1426
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Journal article (peer-reviewed)abstract
- Skeletonization is a way to reduce dimensionality of digital objects. Here, we present an algorithm that computes the curve skeleton of a surface-like object in a 3D image, i.e., an object that in one of the three dimensions is at most two-voxel thick. A
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| 28. |
- Svensson, Stina, et al.
(author)
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Finding Cavities and Tunnels in 3D Complex Objects
- 2003
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Conference paper (peer-reviewed)abstract
- Topological properties are global features that can be useful for recognition of digital objects. For example, this is the case for objects having complex shape without being decomposable into meaningful simple parts. In the case of 3D binary images, top
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| 29. |
- Svensson, Stina, et al.
(author)
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Using distance transforms to decompose 3D discrete objects
- 2002
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In: Image and Vision Computing. ; 20:8, s. 529-
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Journal article (peer-reviewed)abstract
- Object decomposition into simpler parts greatly diminishes the complexity of a recognition task. In this paper, we present a method to decompose a 3D discrete object into nearly convex or elongated parts. Object decomposition is guided by the distance tra
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| 30. |
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