Thanks Randolph. this solution does indeed work for me. The mapping function just manages to manipulate the pixel values enough so that png image can be opened and be pasted onto other images without become blank.
lambda i:i * .0039062500 + 0 how important is the use of the generalized mapping function in here? does the scale and offset of function definitely needs to be adjusted if every image I want to process is similar to each other in terms of min and max values? On 2/4/12, Randolph Bentson <bent...@holmsjoen.com> wrote: > Oh, I guess the lambda function should be generalized by > > (lo,hi) = outI.getextrema() > x = 256.0/(hi-lo) > y = (0-lo)/256.0 > outJ = outI.point(lambda i:i*x+y) > > -- > Randolph Bentson > bent...@holmsjoen.com > _______________________________________________ Image-SIG maillist - Image-SIG@python.org http://mail.python.org/mailman/listinfo/image-sig
