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Amount of Sharpening
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`ksiz'
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enum
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The size of the sharpen kernel to apply. This value must be one of 3, 5, 7, 9, 11, 13 or 15. The smaller the kernel, the faster the effect will run and the greater the degree of sharpening.
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Brightness
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`ksum'
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Fixed
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This is the total value of the elements of the sharpen kernel. Normally this value will be 1.0, which sharpens the source but doesn't change its brightness. If the value is between 0.0 and 1.0, the brightness is decreased, if the value is greater than 1.0, the brightness is increased.
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