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Published byScot Bruce Modified over 8 years ago
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19th Summer School on Image Processing Szeged - Hungary Project #5 and St ps Dávid Almási University of Debrecen Severino Gomes-Neto Federal University of Rio Grande do Norte Melinda Katona University of Szeged Tamás Sámuel Tasi University of Szeged
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Project
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Recognition of Doors and Steps Description – Appeal: Aid permanently or temporarily blind people to know in advance the existence of doors and steps meanwhile they walk – Input: Images from mobile phones (or webcams) – Goal: recognize doors and steps – Tools: Matlab R2010a + Image Processing Toolbox ProjectDatabasePipelineAccuracy Evaluation
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Database
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Actual Pictures ProjectDatabasePipelineAccuracy Evaluation StairsNon stairs
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Actual Pictures ProjectDatabasePipelineAccuracy Evaluation DoorsNon doorsNon stairs
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Pipeline
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Recognizing Steps ProjectDatabasePipelineAccuracy Evaluation Input Image Gray Scaled Crop Histogram Equalization Sharpening Fourier Transform Output Steps! Edge Detection
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Recognizing Doors ProjectDatabasePipelineAccuracy Evaluation Input Image Gray Scaled Crop Histogram Equalization Sharpening Fourier Transform Output Door! Edge Detection
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Accuracy Evaluation
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Positives and Negatives PositivesNegatives Steps True16 (89%)8 (44%)* False2 (11%)10 (56%)* Doors True10 (83%)2 (50%) False2 (17%)2 (50%) ProjectDatabasePipelineAccuracy Evaluation * Computing “out of the range” stairs as false positives. Actually, discarding those, the results are: 8 true negatives (73%) and 3 false negatives (27%)
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