/*******************************************************************************
* Operations.
******************************************************************************/
ColorLevels::Statistics
ColorLevels::getColorLevels(
ColorLevels::Options options,
std::string imagePath,
Magick::Blob* blob)
{
Magick::Image image;
try {
image.read(imagePath);
} catch (Magick::Exception &e) {
throw std::runtime_error(e.what());
}
/* For simplicity, only support sRGB */
if (image.colorSpace() != Magick::sRGBColorspace)
throw std::logic_error("Unsupported colorspace");
/* Convert sRGB to Lab colorspace */
image.colorSpace(Magick::ColorspaceType::LabColorspace);
ColorLevels::Statistics imageStats;
imageStats.width = image.size().width();
imageStats.height = image.size().height();
imageStats.redPixels = 0;
imageStats.purplePixels = 0;
imageStats.backgroundPixels = 0;
const Magick::PixelPacket *pixels = image.getConstPixels(
0, 0, imageStats.width, imageStats.height);
/* Setup image masks */
Magick::Image maskTransparentImage, maskOriginalImage;
Magick::PixelPacket *maskTransparentPixels, *maskOriginalPixels;
if (options.drawMaskOverTransparent) {
maskTransparentImage = Magick::Image(Magick::Geometry(
imageStats.width, imageStats.height),
Magick::Color("rgba(0,0,0,0)"));
maskTransparentPixels = maskTransparentImage.getPixels(0, 0,
imageStats.width, imageStats.height);
}
if (options.drawMaskOverOriginalImage) {
maskOriginalImage = Magick::Image(imagePath);
maskOriginalPixels = maskOriginalImage.getPixels(0, 0,
imageStats.width, imageStats.height);
}
/* Sanity check color coordinates */
if (options.redCoordinateSet) {
if (options.redCoordinate.x >= imageStats.width)
throw std::runtime_error("Invalid red X value.");
if (options.redCoordinate.y >= imageStats.height)
throw std::runtime_error("Invalid red Y value.");
}
if (options.purpleCoordinateSet) {
if (options.purpleCoordinate.x >= imageStats.width)
throw std::runtime_error("Invalid purple X value.");
if (options.purpleCoordinate.y >= imageStats.height)
throw std::runtime_error("Invalid purple Y value.");
}
if (options.backgroundCoordinateSet) {
if (options.backgroundCoordinate.x >= imageStats.width)
throw std::runtime_error("Invalid background X value.");
if (options.backgroundCoordinate.y >= imageStats.height)
throw std::runtime_error("Invalid background Y value.");
}
/* Setup colors */
const ColorLevels::LAB red = options.redCoordinateSet ?
ColorLevels::LABColorToLAB(static_cast<Magick::ColorRGB>(
pixels[(imageStats.width * options.redCoordinate.x) +
options.redCoordinate.y])) :
ColorLevels::getLABValueOfRGBColor(
Magick::ColorRGB(options.redColor));
if (options.redCoordinateSet && options.verbose)
std::cout << "Red color: " << red << std::endl;
const ColorLevels::LAB purple = options.purpleCoordinateSet ?
ColorLevels::LABColorToLAB(static_cast<Magick::ColorRGB>(
pixels[(imageStats.width * options.purpleCoordinate.x) +
options.purpleCoordinate.y])) :
ColorLevels::getLABValueOfRGBColor(
Magick::ColorRGB(options.purpleColor));
if (options.purpleCoordinateSet && options.verbose)
std::cout << "Purple color: " << purple << std::endl;
const Magick::ColorRGB redMaskColor("#00FF00");
const Magick::ColorRGB purpleMaskColor("#0000FF");
const Magick::ColorRGB backgroundMaskColor("#000000");
/* backgroundColor() returns an sRGB value, even in LAB colorspace */
const ColorLevels::LAB backgroundColor =
options.backgroundCoordinateSet ?
ColorLevels::LABColorToLAB(static_cast<Magick::ColorRGB>(
pixels[(imageStats.width * options.backgroundCoordinate.x) +
options.backgroundCoordinate.y])) :
ColorLevels::getLABValueOfRGBColor(
options.backgroundColor == "" ? image.backgroundColor() :
Magick::ColorRGB(options.backgroundColor));
if ((options.backgroundCoordinateSet ||
options.backgroundColor == "") && options.verbose)
std::cout << "Background color: " << backgroundColor <<
std::endl;
for (size_t row = 0; row < imageStats.height; row++) {
for (size_t col = 0; col < imageStats.width; col++) {
/* Get color of current pixel */
size_t offset = (imageStats.width * row) + col;
ColorLevels::LAB currentPixelLAB =
ColorLevels::LABColorToLAB(
static_cast<Magick::ColorRGB>(pixels[offset]));
/* Check pixel for background */
if (ColorLevels::CIEDE2000(backgroundColor,
currentPixelLAB) < options.backgroundThreshold) {
imageStats.backgroundPixels++;
if (options.drawMaskOverTransparent)
maskTransparentPixels[offset] =
backgroundMaskColor;
if (options.drawMaskOverOriginalImage)
maskOriginalPixels[offset] =
backgroundMaskColor;
/* Check pixel for red */
} else if (ColorLevels::CIEDE2000(red,
currentPixelLAB) < options.redThreshold) {
imageStats.redPixels++;
if (options.drawMaskOverTransparent)
maskTransparentPixels[offset] =
redMaskColor;
if (options.drawMaskOverOriginalImage)
maskOriginalPixels[offset] =
redMaskColor;
/* Check pixel for purple */
} else if (ColorLevels::CIEDE2000(purple,
currentPixelLAB) < options.purpleThreshold) {
imageStats.purplePixels++;
if (options.drawMaskOverTransparent)
maskTransparentPixels[offset] =
purpleMaskColor;
if (options.drawMaskOverOriginalImage)
maskOriginalPixels[offset] =
purpleMaskColor;
}
}
}
/* Save masks */
if (options.drawMaskOverTransparent) {
maskTransparentImage.syncPixels();
maskOriginalImage.write(blob);
// maskTransparentImage.write(
// ColorLevels::basenameWithoutExtension(imagePath) +
// "_mask_transparent.png");
}
if (options.drawMaskOverOriginalImage) {
maskOriginalImage.syncPixels();
maskOriginalImage.write(blob);
// maskOriginalImage.write(
// ColorLevels::basenameWithoutExtension(imagePath) +
// "_mask_original.png");
}
std::cout << "ok?" << blob->length() << "\n";
return (imageStats);
}
void Magick::colorSpaceImage::operator()( Magick::Image &image_ ) const
{
image_.colorSpace( _colorSpace );
}