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jomjol
2020-08-23 11:15:47 +02:00
parent b3c0a1e3aa
commit 34dde05741
13 changed files with 204 additions and 33 deletions
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16
code/lib/jomjol_image_proc/CFindTemplate.cpp
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@@ -384,6 +384,22 @@ CImageBasis::CImageBasis(uint8_t* _rgb_image, int _channels, int _width, int _he
this->externalImage = true;
}
void CImageBasis::Contrast(float _contrast) //input range [-100..100]
{
stbi_uc* p_source;
float contrast = (_contrast/100) + 1; //convert to decimal & shift range: [0..2]
float intercept = 128 * (1 - contrast);
for (int x = 0; x < width; ++x)
for (int y = 0; y < height; ++y)
{
p_source = this->rgb_image + (this->channels * (y * this->width + x));
for (int channels = 0; channels < this->channels; ++channels)
p_source[channels] = (uint8_t) std::min(255, std::max(0, (int) (p_source[channels] * contrast + intercept)));
}
}
CImageBasis::~CImageBasis()
{
if (!this->externalImage)