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copied!<p>To increase the depth of an emboss filter, increase the radius of the filter's mask. Low depth:</p> <pre><code>h = [[1, 0, 0] [0, 0, 0] [0, 0, -1]] </code></pre> <p>versus high depth:</p> <pre><code>h = [[1, 0, 0, 0, 0, 0, 0] [0, 0, 0, 0, 0, 0, 0] [0, 0, 0, 0, 0, 0, 0] [0, 0, 0, 0, 0, 0, 0] [0, 0, 0, 0, 0, 0, 0] [0, 0, 0, 0, 0, 0, 0] [0, 0, 0, 0, 0, 0, -1]] </code></pre> <p>To change the azimuth, place the nonzero coefficients at a different angle:</p> <pre><code>h = [[0, 0, 1] [0, 0, 0] [-1, 0, 0]] </code></pre> <p>I'm not really sure about elevation. You may need to change the nonzero coefficient values? I just know it needs to be a high-pass filter.</p> <p>In any case, to compute and display the image using a Scipy solution:</p> <pre><code>import scipy.misc, scipy.signal im = scipy.misc.imread(filename) im_out = scipy.signal.convolve2d(im, h, 'same') scipy.misc.imshow(im_out) </code></pre> <p>Hope this helps.</p> <p>EDIT: Okay, as Paul hinted with PIL, you can adjust filter parameters, or even define a completely new kernel. The scale and offset parameters have nothing to do with what you are looking for. The size of the filter is most important for adjusting depth.</p> <p>Upon further investigation, PIL does not let you change the filter size beyond 5x5. Seems strange. Therefore, you will not get as dramatic a change in depth as you probably expect.</p> <p>For total control, you may want to try the Scipy solution I and Paul mentioned earlier. Change the filter size to something ridiculous, like 21x21, and see if it makes the type of difference you want.</p>

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