Function hueSquaredMean

src/HdrWizard/AutoAntighosting.cpp:143–179

}

void hueSquaredMean(const HdrCreationItemContainer &data, vector<float> &HE) {
    size_t width = data[0].frame()->getWidth();
    size_t height = data[0].frame()->getHeight();
    size_t numItems = data.size();

    float r, g, b, h, s, l;

    BufferF hues(numItems, 0.f);
    BufferF HS(numItems, 0.f);

    const Channel *X, *Y, *Z;

    for (size_t j = 0; j < height; j++) {
        for (size_t i = 0; i < width; i++) {
            for (size_t w = 0; w < numItems; w++) {
                data[w].frame()->getXYZChannels(X, Y, Z);

                r = (*X)(i, j);
                g = (*Y)(i, j);
                b = (*Z)(i, j);
                rgb2hsl(r, g, b, h, s, l);
                hues[w] = h;
            }

            float hueMean_ = hueMean(hues);

            for (size_t w = 0; w < numItems; w++) {
                float H = hueMean_ - hues[w];
                HS[w] += H * H;
            }
        }
    }

    for (size_t w = 0; w < numItems; w++) {
        HE[w] = HS[w] / (width * height);
    }
}

void sdv(const HdrCreationItem &item1, const HdrCreationItem &item2,
         const float deltaEV, const int dx, const int dy, float &sR, float &sG,