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Break existing sharpen API to accept sigma and improve precision

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Lovell Fuller
2016-03-31 22:00:33 +01:00
parent ee21d2991c
commit b7a098fb28
8 changed files with 55 additions and 48 deletions
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12
src/operations.cc
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@@ -135,10 +135,10 @@ namespace sharp {
}
/*
* Gaussian blur (use sigma <0 for fast blur)
* Gaussian blur. Use sigma of -1.0 for fast blur.
*/
VImage Blur(VImage image, double const sigma) {
if (sigma < 0.0) {
if (sigma == -1.0) {
// Fast, mild blur - averages neighbouring pixels
VImage blur = VImage::new_matrixv(3, 3,
1.0, 1.0, 1.0,
@@ -153,10 +153,10 @@ namespace sharp {
}
/*
* Sharpen flat and jagged areas. Use radius of -1 for fast sharpen.
* Sharpen flat and jagged areas. Use sigma of -1.0 for fast sharpen.
*/
VImage Sharpen(VImage image, int const radius, double const flat, double const jagged) {
if (radius == -1) {
VImage Sharpen(VImage image, double const sigma, double const flat, double const jagged) {
if (sigma == -1.0) {
// Fast, mild sharpen
VImage sharpen = VImage::new_matrixv(3, 3,
-1.0, -1.0, -1.0,
@@ -167,7 +167,7 @@ namespace sharp {
} else {
// Slow, accurate sharpen in LAB colour space, with control over flat vs jagged areas
return image.sharpen(
VImage::option()->set("radius", radius)->set("m1", flat)->set("m2", jagged)
VImage::option()->set("sigma", sigma)->set("m1", flat)->set("m2", jagged)
);
}
}