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Ensure precision of trim threshold, update docs #914

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Lovell Fuller
2018-10-02 12:45:37 +01:00
parent 21fbe546b8
commit 60438ebfe5
4 changed files with 7 additions and 7 deletions
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7
src/operations.cc
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@@ -327,15 +327,16 @@ namespace sharp {
/*
Trim an image
*/
VImage Trim(VImage image, int const threshold) {
VImage Trim(VImage image, double const threshold) {
// Top-left pixel provides the background colour
VImage background = image.extract_area(0, 0, 1, 1);
if (HasAlpha(background)) {
background = background.flatten();
}
int top, width, height;
int const left = image.find_trim(&top, &width, &height,
VImage::option()->set("background", background(0, 0)));
int const left = image.find_trim(&top, &width, &height, VImage::option()
->set("background", background(0, 0))
->set("threshold", threshold));
if (width == 0 || height == 0) {
throw VError("Unexpected error while trimming. Try to lower the tolerance");
}

2
src/operations.h
View File

@@ -100,7 +100,7 @@ namespace sharp {
/*
Trim an image
*/
VImage Trim(VImage image, int const threshold);
VImage Trim(VImage image, double const threshold);
/*
* Linear adjustment (a * in + b)