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Add support to normalise for lower and upper percentiles (#3583)

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This commit is contained in:
LachlanNewman
2023-03-01 19:10:44 +08:00
committed by Lovell Fuller
parent 1eefd4e562
commit d7776e3b98
9 changed files with 140 additions and 22 deletions
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5
src/pipeline.cc
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@@ -74,6 +74,7 @@ class PipelineWorker : public Napi::AsyncWorker {
VipsAngle autoRotation = VIPS_ANGLE_D0;
bool autoFlip = FALSE;
bool autoFlop = FALSE;
if (baton->useExifOrientation) {
// Rotate and flip image according to Exif orientation
std::tie(autoRotation, autoFlip, autoFlop) = CalculateExifRotationAndFlip(sharp::ExifOrientation(image));
@@ -682,7 +683,7 @@ class PipelineWorker : public Napi::AsyncWorker {
// Apply normalisation - stretch luminance to cover full dynamic range
if (baton->normalise) {
image = sharp::Normalise(image);
image = sharp::Normalise(image, baton->normaliseLower, baton->normaliseUpper);
}
// Apply contrast limiting adaptive histogram equalization (CLAHE)
@@ -1483,6 +1484,8 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
baton->linearB = sharp::AttrAsVectorOfDouble(options, "linearB");
baton->greyscale = sharp::AttrAsBool(options, "greyscale");
baton->normalise = sharp::AttrAsBool(options, "normalise");
baton->normaliseLower = sharp::AttrAsUint32(options, "normaliseLower");
baton->normaliseUpper = sharp::AttrAsUint32(options, "normaliseUpper");
baton->tintA = sharp::AttrAsDouble(options, "tintA");
baton->tintB = sharp::AttrAsDouble(options, "tintB");
baton->claheWidth = sharp::AttrAsUint32(options, "claheWidth");