static void ApplyAverageBlurFilter(PBYTE frameData, PBITMAPINFO frameInfo, PBYTE targetBuffer)
{
LONG width = frameInfo->bmiHeader.biWidth;
LONG height = frameInfo->bmiHeader.biHeight;
for (int x=1; x < width-1; x++)
{
for (int y=1; y < height-1; y++)
{
// Calculate average of all pixels in a 3x3 rectangle around (x, y)
targetBuffer[x + y*width] = (
GetPixelAt(frameData, x-1, y-1, height) + GetPixelAt(frameData, x, y-1, height) + GetPixelAt(frameData, x+1, y-1, height) +
GetPixelAt(frameData, x-1, y, height) + GetPixelAt(frameData, x, y, height) + GetPixelAt(frameData, x+1, y, height) +
GetPixelAt(frameData, x-1, y+1, height) + GetPixelAt(frameData, x, y+1, height) + GetPixelAt(frameData, x+1, y+1, height)
) / 9;
}
}
}
PixelColor::Enum PotraceImage::RB(Imaging::image_size_t x, Imaging::image_size_t y) const {
return GetPixelAt(x, y, 1, 1);
}
