Test which verifies the basic facilities of feConvolveMatrix.
This test defines six filters that exercise traditional convolutions: uniform blur, vertical and horizontal blurs, edge detection, embossing and sharpening. Note that the edge detection filter produces a fully transparent image because the alpha channel is convolved and produces 0 values.
Run the test. No interaction required.
The rendered picture should match the reference image exactly, except for possible variations in the labelling text (per CSS2 rules).