May 21, 2004
6:50 a.m.
On Fri, 2004-05-21 at 15:01, John Hunter wrote:
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.
Any suggestions?
For numarray try numarray.convolve.correlate2d and set fft=1. Todd