void FilterLed::Stretch

(

)

const

Definition at line 502 of file FilterLed.cc.

Referenced by Execute(), and MStarguider::ProcessFrame().

{
    uint8_t min, max;
    GetMinMax(25, &min, &max);

    if (min==max || max-min>230) // 255/230=1.1
        return;

    const float scale = 255./(max-min);

    uint8_t *b = fImg;
    const uint8_t *e = fImg+fW*fH;

    while (b<e)
    {
        if (*b<min)
        {
            *b++=0;
            continue;
        }
        if (*b>max)
        {
            *b++=255;
            continue;
        }
        *b = (uint8_t)((*b-min)*scale);
        b++;
    }
}

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