irregular objects. shape detection and characteristic sizes
TRANSCRIPT
Irregular objects.Shape detection and characteristic sizes
Nizhny Tagil Technological Institute (branch)of Ural Federal University
Sergey O. BochkarevIgor B. Litus
Natalia S. Kravchenko
Task• Find contour of object on a
picture.• Detect standard shape, in which
it looks like.• Find characteristic sizes
Standard shapes• Rectangle
• Circle
• Rhombus
• Ellipse
Standard shapes
Used technologies• Camera Nikon D800 7360px × 4912px
• C#-based software
• DBMS mysql
• Computer vision library opencv
Used criterion: rectness• Rectness - closeness of contour to rectangle
𝑟𝑒𝑐=𝑆𝑐𝑜𝑛𝑡𝑜𝑢𝑟
𝑆𝑟𝑒𝑐𝑡
Used criterion: circless• Circless - closeness of contour to circle
𝑐𝑖𝑟=𝑆𝑐𝑜𝑛𝑡𝑜𝑢𝑟
𝑆𝑐𝑖𝑟𝑐𝑙𝑒
Used criterion: ellipseness• Ellipseness - closeness of contour to ellipse
𝑒𝑙𝑙=𝑆𝑐𝑜𝑛𝑡𝑜𝑢𝑟
𝑆𝑒𝑙𝑙𝑖𝑝𝑠𝑒
Compactness of standard shapes
Results of detection: generated figures
Results of detection: ragged figures
Results of detection: regular figures
Results of detection: irregular figures