Circle Detection Through Nearest Distance

Object detection plays an important role in the field of image process. If the image is seriously effected by the light or contains different levels of noise, the detection will go wrong. The aim of this paper is to detect the circular spots in an image which is effected by an intensity of light. So in this paper, we apply a modified average filtering and binaryzation to get a binary image, and then get a edge binary image by applying an edge detection method named nearest distance method, and then we estimate the circle degree on the edge grids in the edge binary image, finally we obtain all the circular spots by filtering the circles according the circle degree threshold. We test such method on a concrete image and get a good performance on the circle detection.