public LabColor rgb2lab(BaseColor baseColor) {
double rLinear = baseColor.getRed() / 255f;
double gLinear = baseColor.getGreen() / 255f;
double bLinear = baseColor.getBlue() / 255f;
// convert to a sRGB form
double r =
(rLinear > 0.04045) ? Math.pow((rLinear + 0.055) / (1 + 0.055), 2.2) : (rLinear / 12.92);
double g =
(gLinear > 0.04045) ? Math.pow((gLinear + 0.055) / (1 + 0.055), 2.2) : (gLinear / 12.92);
double b =
(bLinear > 0.04045) ? Math.pow((bLinear + 0.055) / (1 + 0.055), 2.2) : (bLinear / 12.92);
// converts
double x = r * 0.4124 + g * 0.3576 + b * 0.1805;
double y = r * 0.2126 + g * 0.7152 + b * 0.0722;
double z = r * 0.0193 + g * 0.1192 + b * 0.9505;
float l = Math.round((116.0 * fXyz(y / whitePoint[1]) - 16) * 1000) / 1000f;
float a =
Math.round((500.0 * (fXyz(x / whitePoint[0]) - fXyz(y / whitePoint[1]))) * 1000) / 1000f;
float bee =
Math.round((200.0 * (fXyz(y / whitePoint[1]) - fXyz(z / whitePoint[2]))) * 1000) / 1000f;
return new LabColor(this, l, a, bee);
}
public static float[] getColorArray(BaseColor color) {
int type = ExtendedColor.getType(color);
switch (type) {
case ExtendedColor.TYPE_GRAY:
{
return new float[] {((GrayColor) color).getGray()};
}
case ExtendedColor.TYPE_CMYK:
{
CMYKColor cmyk = (CMYKColor) color;
return new float[] {cmyk.getCyan(), cmyk.getMagenta(), cmyk.getYellow(), cmyk.getBlack()};
}
case ExtendedColor.TYPE_SEPARATION:
{
return new float[] {((SpotColor) color).getTint()};
}
case ExtendedColor.TYPE_DEVICEN:
{
return ((DeviceNColor) color).getTints();
}
case ExtendedColor.TYPE_RGB:
{
return new float[] {
color.getRed() / 255f, color.getGreen() / 255f, color.getBlue() / 255f
};
}
}
throwColorSpaceError();
return null;
}