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Ensure correct Gaussian blur before affine #121

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Use double sigma instead of int radius for blur
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Lovell Fuller
2014-11-20 13:59:39 +00:00
parent 177a4f574c
commit b7c7fc22f3
6 changed files with 57 additions and 38 deletions
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README.md
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@@ -319,13 +319,13 @@ Do not enlarge the output image if the input image width *or* height are already
This is equivalent to GraphicsMagick's `>` geometry option: "change the dimensions of the image only if its width or height exceeds the geometry specification".
#### blur([radius])
#### blur([sigma])
When used without parameters, performs a fast, mild blur of the output image. This typically reduces performance by 10%.
When a `radius` is provided, performs a slower, more accurate Gaussian blur. This typically reduces performance by 30%.
When a `sigma` is provided, performs a slower, more accurate Gaussian blur. This typically reduces performance by 25%.
* `radius`, if present, is an integral Number representing the approximate blur mask radius in pixels.
* `sigma`, if present, is a Number between 0.3 and 1000 representing the approximate blur radius in pixels.
#### sharpen([radius], [flat], [jagged])