SpatialFilterApplet Reference
img : name of image
area : base x,base y,width,height
matrix : size,matrix elements...,division,threshold,invert
[3 <= matrix size <= 9]
[0 < division]
[0 <= threshold <= 255]
[invert : 0 (= false) or 1 (= true)]
SpatialFilterApplet Samples
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3 x 3 sharpen
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3 x 3 embossing
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5 x 5 blur (Region)
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