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BlurDivide

BlurDivide divides an image by a blurred version of itself. Each output pixel is the input pixel's value divided by the average of its neighbors inside a chosen shape.

Shape Neighborhood
circle (default) a circle whose diameter is “width” (at least 4)
rectangle a rectangle of “width” × “height” (each at least 1)
diamond a square rotated by 45°, whose diagonal is “width” (at least 2)

If you do not give a size, the neighborhood is 101 × 101 pixels. If you give only the width, the height is the same. “number of blurs” applies the blur 1, 2 or 3 times before the division.

The input can be byte, integer or floating point, and the output is floating point. For blurring alone, see Blur, Sharpen.