"Todd" == Todd Miller <jmiller@stsci.edu> writes:
>> I have a series of luminance images that I want to do some >> correlation analyses on. Each image is an MxN frame of a >> movie. I want to compute the correlation between a given pixel >> i,j, and every other pixel in the image over each frame. That >> is, if I assume xij is a numFrames length time series, and xkl >> is another numFrames length time series (the pixel intensities >> at two points in the image over time), I want to compute the >> corrcoeff(xij, xkl) for every kl with ij fixed. >> I know I could do this by looping over the pixels of the image, >> but I'm hoping for something a bit faster. Todd> For numarray try numarray.convolve.correlate2d and set Todd> fft=1. I've looked at this and don't know if I'm missing something or if this isn't the right function for me. I want to correlate a given pixel intensity with the intensity at all other pixels over a series of images. Is this possible with correlate2d? JDH