vaneric wrote: > hi > i have a set of RGB images of diff faces (of people )as a 2 dim > numpyarray > ..something like > threefaces=array([[xa1,xa2,xa3], > [xb1,xb2,xb3], > [xc1,xc2,xc3]]) > where xa1,xa2,xa3 are tuples each representing rgb values of a pixel > of first image .. > > i need to create the average face image and display it.problem is i > need to calculate (xa1+xb1+xc1)/3 etc to calculate avearge value of > each pixel.how can i do this calculation.do i need to convert the > r,g,b in to a single value for each pixel? the average value of a > pixel will be a float isn't it? how can i create a PIL image from > this? > any help,directive greatly appreciated > eric
Take a look at ImageChops.difference. I've used it to calculate a difference value as follows: diff=ImageChops.difference(im1, im2) totaldiff=sum(ImageStat.Stat(diff)._getmedian()) Maybe at least this will point you in the right direction. -Larry Bates -- http://mail.python.org/mailman/listinfo/python-list
