Need tips for a localized cascade detection
Hi I use cascade classifier to detect patterns of interest in a video. I need to limit my detection only in certain areas of the image. The co-ordinates change based on from which view the photo was taken. nevertheless, I am able to apply a few filters / erosion and am able to arrive at a pattern where I get a thick White (close too pixel value 255) patch across the image that segregate my region of interest and the region I am not interested in. How should I programmatically choose the region "above" this white patch and not consider the rest of the image? Any ideas?
A more practical example: Imagine looking at a picture taken in a football/soccor stadium. The image has a lot of spectators, a view of the playground and the sky above. So, I apply certain filters etc.. to mark the area of the spectators as a white region. But, I need my cascade classifiers to detect only the region above this patch (sky region) and ignore any patterns below this. Any ideas?
Please let me know I need to provide any additional information to get help.