After binarization of the original image, Canny detection technique and Hough transform are being applied; the road lines thus are being detected [12].
To get true edges, Canny edge detection technique [36] has been used.
They divide the process in three main steps: image enhancement using median filtering to remove noise, image segmentation using a histogram modification technique, and Canny edge detection to finally distinguish crack edges from the rest of the image.
The association isn't entirely random, given Cheng's canny use of cinematic techniques, from omniscient aerial views to extreme closeups.
Fig. 7 Visual comparison between techniques: (A) Canny, (B) DoG, (C) FDoG, and (D) proposed approach.
Since in the edge locations it is not easy to obtain a noisy image, some images preprocessing techniques and Canny Edge detection method [15] are used to find the edge map of the object contours.
The most popular edge detection technique is the Canny edge detector because of its simplicity and accuracy.
The edge-based segmentation techniques such as Canny edge detector [12], active contour [13], and edge following [14 16] emphasize on detecting significant gray-level changes near object boundaries.
With the help of image processing techniques such as binarization, Canny edge detection method, and Hough transform, the road lines are thus identified, which means the drivable area can be defined.
All this is managed with magnificent confidence by Mendes, who shows an awe-inspiringly precocious mastery of technique, in part due to canny reliance on his veteran cinematographer Conrad L Hall.
