Irregular Objects. Shape Detection and Characteristic Sizes
Transcript of Irregular Objects. Shape Detection and Characteristic Sizes
![Page 1: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/1.jpg)
Irregular objects.Shape detection and characteristic sizes
Nizhny Tagil Technological Institute (branch)of Ural Federal University
Sergey O. BochkarevIgor B. Litus
Natalia S. Kravchenko
![Page 2: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/2.jpg)
Task• Find contour of object on a
picture.• Detect standard shape, in which
it looks like.• Find characteristic sizes
![Page 3: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/3.jpg)
Standard shapes• Rectangle
• Circle
• Rhombus
• Ellipse
![Page 4: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/4.jpg)
Standard shapes
![Page 5: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/5.jpg)
Used technologies• Camera Nikon D800 7360px × 4912px
• C#-based software
• DBMS mysql
• Computer vision library opencv
![Page 6: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/6.jpg)
Used criterion: rectness• Rectness - closeness of contour to rectangle
𝑟𝑒𝑐=𝑆𝑐𝑜𝑛𝑡𝑜𝑢𝑟
𝑆𝑟𝑒𝑐𝑡
![Page 7: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/7.jpg)
Used criterion: circless• Circless - closeness of contour to circle
𝑐𝑖𝑟=𝑆𝑐𝑜𝑛𝑡𝑜𝑢𝑟
𝑆𝑐𝑖𝑟𝑐𝑙𝑒
![Page 8: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/8.jpg)
Used criterion: ellipseness• Ellipseness - closeness of contour to ellipse
𝑒𝑙𝑙=𝑆𝑐𝑜𝑛𝑡𝑜𝑢𝑟
𝑆𝑒𝑙𝑙𝑖𝑝𝑠𝑒
![Page 9: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/9.jpg)
Compactness of standard shapes
![Page 10: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/10.jpg)
Results of detection: generated figures
![Page 11: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/11.jpg)
Results of detection: ragged figures
![Page 12: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/12.jpg)
Results of detection: regular figures
![Page 13: Irregular Objects. Shape Detection and Characteristic Sizes](https://reader036.fdocuments.us/reader036/viewer/2022081604/58d0f33d1a28abc00b8b48f7/html5/thumbnails/13.jpg)
Results of detection: irregular figures