Fig. 16From: Line and circle detection using dense one-to-one Hough transforms on greyscale imagesComparison between the DHT and the other HTs for circle detection. a On clean image. b On image with additive noise (SNR = 5). c On image with salt-and-pepper noise (p=5%). d On non-uniform contrast image (c=4). Each colour corresponds to a different method. Red DHT, green RHT, blue SHT, magenta 2–1 HT, yellow CACDBack to article page