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Expose erode and dilate operations #4243

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This commit is contained in:
Quentin Pinçon
2025-03-27 12:59:02 +00:00
committed by Lovell Fuller
parent 03e1b19764
commit 031c808aa5
17 changed files with 249 additions and 0 deletions
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12
src/pipeline.cc
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@@ -609,6 +609,16 @@ class PipelineWorker : public Napi::AsyncWorker {
image = sharp::Threshold(image, baton->threshold, baton->thresholdGrayscale);
}
// Dilate - must happen before blurring, due to the utility of dilating after thresholding
if (baton->dilateWidth != 0) {
image = sharp::Dilate(image, baton->dilateWidth);
}
// Erode - must happen before blurring, due to the utility of eroding after thresholding
if (baton->erodeWidth != 0) {
image = sharp::Erode(image, baton->erodeWidth);
}
// Blur
if (shouldBlur) {
image = sharp::Blur(image, baton->blurSigma, baton->precision, baton->minAmpl);
@@ -1621,6 +1631,8 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
baton->gammaOut = sharp::AttrAsDouble(options, "gammaOut");
baton->linearA = sharp::AttrAsVectorOfDouble(options, "linearA");
baton->linearB = sharp::AttrAsVectorOfDouble(options, "linearB");
baton->dilateWidth = sharp::AttrAsUint32(options, "dilateWidth");
baton->erodeWidth = sharp::AttrAsUint32(options, "erodeWidth");
baton->greyscale = sharp::AttrAsBool(options, "greyscale");
baton->normalise = sharp::AttrAsBool(options, "normalise");
baton->normaliseLower = sharp::AttrAsUint32(options, "normaliseLower");