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Can you process the image file line by line ?
So you only have to read and store one scanline in memory and process it.
2009-07-08 15:21:10 UTC in FreeImage
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A 2D convolution can be made in two step in most of the case (by using separable filter). Look to wikipedia page for sobel edge detector (sobel_operator) for example.
So you do it with the 1D convolution code provided as exemple by changing the gaussian kernel into a sobel kernel [1 2 1]T * [+1 0 -1]
So you can apply horizontal kernel and transpose the image if you need. Or write a method to...
2009-07-06 13:41:29 UTC in Adobe Source Libraries
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If you use JPEG files you can try to read exif value. (Height and Width are saved by some software or camera).
2009-05-27 17:22:52 UTC in FreeImage
