Examples of javax.media.jai.IHSColorSpace

javax.media.jai.IHSColorSpace

Singleton class representing the IHS (Intensity, Hue, Saturation) color space (also known as HSI or HIS).

The RGB-to-IHS transformation is defined by the equations:

I = (R+G+B)/3
S = 1-min(R, G, B)/I
H=G > B ? h : 2*PI - h, where
h = cos^-1{[(R-G)+(R-B)]/2[(R-G)²+ (R-G)(G-B)]^1/2}

where the R, G, B values have been normalized to the range [0.0, 1.0]. Refer to Practical Algorithms for Image Analysis, Seul, et. al., (Cambridge, 2000), pages 50-55, for more information. The inverse transformation (IHS-to-RGB) is defined as:

When H is in [2PI/3, 4PI/3], R should be the smallest. Then, there exists

R = (1-S)I

and

G = (c1 + c2)/2

B = (c1 - c2)/2

where c1 = 3I-R and c2 = sqrt(3)(R-I)tg(H)

when H is in [4PI/3, 2PI],

G = (1-S)I

and

B = (c1 + c2)/2

R = (c1 - c2)/2

where c1 = 3I-G and c2 = sqrt(3)(G-I)tg(H-2PI/3)

when H is in [0, 2PI/3],

B = (1-S)I

and

R = (c1 + c2)/2

G = (c1 - c2)/2

where c1 = 3I-B and c2 = sqrt(3)(B-I)tg(H-4PI/3)

Methods defined in the superclasses are not commented extensively. @see ColorSpaceJAI @since JAI 1.1

    public final ImageWorker forceColorSpaceIHS() {
        if (!isColorSpaceIHS()) {
            forceComponentColorModel();


            // Create a ColorModel to convert the image to IHS.
            final IHSColorSpace ihs = IHSColorSpace.getInstance();
            final int numBits = image.getColorModel().getComponentSize(0);
            final ColorModel ihsColorModel = new ComponentColorModel(ihs, new int[] { numBits,
                    numBits, numBits }, false, false, Transparency.OPAQUE, image.getSampleModel()
                    .getDataType());

Examples of javax.media.jai.IHSColorSpace

Related Classes of javax.media.jai.IHSColorSpace