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Simple grey world white balance

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This commit is contained in:
Dušan Poizl
2022-12-20 22:27:15 +01:00
parent 66e13529be
commit 5cc8fdd83d
3 changed files with 19 additions and 0 deletions
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imagescrollareagl.cpp
+15
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@@ -353,6 +353,8 @@ void ImageWidget::paintGL()
m_program->setUniformValue("zoom", 1.0f/m_scale);
m_program->setUniformValue("bw", m_bwImg && !m_superpixel);
m_program->setUniformValue("invert", m_invert);
if(m_superpixel)m_program->setUniformValue("whiteBalance", m_whiteBalance[0], m_whiteBalance[1], m_whiteBalance[2]);
else m_program->setUniformValue("whiteBalance", 1.0f, 1.0f, 1.0f);
#ifdef COLOR_MANAGMENT
m_program->setUniformValue("srgb", m_srgb);
#endif
@@ -642,6 +644,19 @@ void ImageWidget::debayer()
f->glGenerateMipmap(GL_TEXTURE_2D);
f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
f->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
int size = std::max(m_imgWidth, m_imgHeight);
int level = 0;
while(size >>= 1)level++;
int w,h;
f3->glGetTexLevelParameteriv(GL_TEXTURE_2D, level, GL_TEXTURE_WIDTH, &w);
f3->glGetTexLevelParameteriv(GL_TEXTURE_2D, level, GL_TEXTURE_HEIGHT, &h);
uint16_t pixel[w*h*4];
f3->glGetTexImage(GL_TEXTURE_2D, level, GL_RGBA, GL_UNSIGNED_SHORT, pixel);
float maxRGB = std::max(std::max(pixel[0], pixel[1]), pixel[2]);
m_whiteBalance[0] = maxRGB / pixel[0];
m_whiteBalance[1] = maxRGB / pixel[1];
m_whiteBalance[2] = maxRGB / pixel[2];
}
ImageScrollAreaGL::ImageScrollAreaGL(Database *database, QWidget *parent) : QWidget(parent)