I think you have the matrix laid out wrong. Instead of > oiio.ImageBufAlgo.warp(xform, src, (1, 0, x_offset, 0, 1, y_offset, 0, 0, > 1))
you want oiio.ImageBufAlgo.warp(xform, src, (1, 0, 0, 0, 1, 0, x_offset, y_offset, 1)) > On Feb 16, 2016, at 8:25 AM, Jep Hill <[email protected]> wrote: > > Thanks Larry. > > The integer based transform worked like a charm. > > The warp, however, wasn’t working as expected. I tried it in both OIIO > 1.6.4dev and 1.6.10. Basically, when I enter any value other than “0” (zero) > as a transform value in the matrix, I get a very dark (if not negative) > image. I’ve included an example snippet: > > # oiio write func from docs > def write_image(image_buffer, filename, format=oiio.UNKNOWN): > if not image_buffer.has_error: > image_buffer.set_write_format(format) > image_buffer.write(filename) > if image_buffer.has_error: > print "Error writing %s : %s" % (filename, image_buffer.geterror()) > > # warp test > def warp_test(in_img, out_img, x_offset=0, y_offset=0): > ''' > Simple warp function to test x and y transforms. > ''' > src = oiio.ImageBuf(in_img) > xform = oiio.ImageBuf() > oiio.ImageBufAlgo.warp(xform, src, (1, 0, x_offset, 0, 1, y_offset, 0, 0, > 1)) > write_image(xform, out_img) > > > Is anyone able to get a simple sub-pixel x/y transform working using > oiio.ImageBufAlgo.warp? > > Cheers, > Jep > > > _______________________________________________ > Oiio-dev mailing list > [email protected] > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org -- Larry Gritz [email protected]
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