javax.media.jai.operator

The "Absolute" operation takes a single rendered or renderable source image, and computes the mathematical absolute value of each pixel:

 if (src[x][y][b] < 0) {
 dst[x][y][b] = -src[x][y][b];
 } else {
 dst[x][y][b] =  src[x][y][b];
 }
 

For signed integral data types, the smallest value of the data type does not have a positive counterpart; such values will be left unchanged.

The AddCollection operation takes a collection of rendered or renderable source images, and adds every set of pixels, one from each source image of the corresponding position and band.

The AddConst operation takes one rendered or renderable source image and an array of double constants, and adds a constant to every pixel of its corresponding band of the source.

The AddConstToCollection operation takes a collection of rendered images and an array of double constants, and for each rendered image in the collection adds a constant to every pixel of its corresponding band.

The Add operation takes two rendered or renderable source images, and adds every pair of pixels, one from each source image of the corresponding position and band.

This operation takes one rendered or renderable image and an array of integer constants, and performs a bit-wise logical "and" between every pixel in the same band of the source and the constant from the corresponding array entry.

The And operation takes two source images, and performs a bit-wise logical "and" on every pair of pixels, one from each source image, of the corresponding position and band.

The AWTImage operation converts a standard java.awt.Image into a rendered image.

The BandCombing operation computes a set of arbitrary linear combinations of the bands of a rendered or renderable source image, using a specified matrix.

The BandMerge operation takes two or more rendered or renderable images, and performs "BandMerge" on every pixel.

The BandSelect operation chooses N bands from a rendered or renderable source image and copies the pixel data of these bands to the destination image in the order specified.

The "Binarize" operation takes one rendered or renderable single-banded source image and a threshold value and applies a thresholding operation to the produce a bilevel image.

By default the destination image bounds are equal to those of the source image.

The "BMP" operation reads a standard BMP input stream. The "BMP" operation currently reads Version2, Version3 and some of the Version 4 images, as defined in the Microsoft Windows BMP file format.

Version 4 of the BMP format allows for the specification of alpha values, gamma values and CIE colorspaces.

The Border operation adds a border around a rendered image.

The "BoxFilter" operation determines the intensity of a pixel in an image by averaging the source pixels within a rectangular area around the pixel.

The Clamp operation takes one rendered or renderable source image, and sets all the pixels whose value is below a "low" value to that low value and all the pixels whose value is above a "high" value to that high value.

The "ColorConvert" operation performs a pixel-by-pixel color conversion of the data in a rendered or renderable source image.

The data are treated as having no alpha channel, i.e., all bands are color bands.

This operation generates an optimal lookup table (LUT) based on the provided 3-band RGB source image by executing a color quantization algorithm.

Class used to represent the acceptable values of the "quantizationAlgorithm" parameter of the "ColorQuantizer" operation.

The "Composite" operation combines two images based on their alpha values at each pixel.

The Conjugate operation negates the imaginary components of pixel values of a rendered or renderable source image containing complex data.

The Constant operation creates a multi-banded, tiled rendered image, where all the pixels from the same band have a constant value.

Convolution is a spatial operation that computes each output sample by multiplying elements of a kernel with the samples surrounding a particular source sample.

For each destination sample, the kernel is rotated 180 degrees and its "key element," or origin, is placed over the source pixel corresponding with the destination pixel.

The Crop operation takes one rendered or renderable image and crops the image to a specified rectangular area.

The "DCT" operation computes the even discrete cosine transform (DCT) of an image.

The DivideByConst operation takes one rendered or renderable source image and an array of double constants, and divides every pixel of the same band of the source by the constant from the corresponding array entry.

The "DivideComplex" operation divides two images representing complex data.

The Divide operation takes two rendered or renderable images, and for every pair of pixels, one from each source image of the corresponding position and band, divides the pixel from the first source by the pixel from the second source.

The DivideIntoConst operation takes one rendered or renderable image and an array of double constants, and divides every pixel of the same band of the source into the constant from the corresponding array entry.

The third parameter contains an instance of ImageEncodeParam to be used during the decoding.

Gray Scale Erosion is a spatial operation that computes each output sample by subtracting elements of a kernel from the samples surrounding a particular source sample. The mathematical formulation for erosion operation is:

For a kernel K with a key position (xKey, yKey), the erosion of image I at (x,y) is given by:

 max{ f:  f + K(xKey+i, yKey+j) <= I(x+i,y+j): all (i,j)}
 "all" possible (i,j) means that both I(x+i,y+j) and K(xKey+i, yKey+j)
 are in bounds.

The "Exp" operation takes the exponential of the pixel values of an image.

The Extrema operation scans a specific region of a rendered image and finds the maximum and minimum pixel values for each band within that region of the image.

In the default instance the validateParameters() method checks that the named file exists and is readable.

In the default instance the validateParameters() method checks for the named file to be writable if it already exists, else that it can be created.

This property generator computes the properties for the operation "FilteredSubsample" dynamically.

The "Format" operation performs reformatting on an image.

The second parameter contains an instance of FPXDecodeParam to be used during the decoding. It may be set to null in order to perform default decoding, or equivalently may be omitted.

The classes in the com.sun.media.jai.codec package are not a committed part of the JAI API.

The "GIF" operation reads an image from a GIF stream.

The classes in the com.sun.media.jai.codec package are not a committed part of the JAI API.

The "GradientMagnitude" operation is an edge detector which computes the magnitude of the image gradient vector in two orthogonal directions.

The result of the "GradientMagnitude" operation may be defined as:

 dst[x][y][b] = ((SH(x,y,b))^2 + (SV(x,y,b))^2 )^0.5
 

A histogram of an image is represented by a list of "bins" where each bin is the total number of pixel samples of the image whose values lie within a given range.

The "IDCT" operation computes the inverse even discrete cosine transform (DCT) of an image.

This operation provides client-side support of the Internet Imaging Protocol (IIP) in both the rendered and renderable modes.

This operation provides client-side support of the Internet Imaging Protocol (IIP) in the rendered mode.

The "JPEG" operation reads an image from a JPEG (JFIF) stream.

The classes in the com.sun.media.jai.codec package are not a committed part of the JAI API.

The "Log" operation takes the natural logarithm of the pixel values of an image.

The Lookup operation takes a rendered or renderable image and a lookup table, and performs general table lookup by passing the source image through the table.

The source may be a single- or multi-banded image of data types byte, ushort, short, or int.

The "Magnitude" operation computes the magnitude of each pixel of a complex image.

The "MagnitudeSquared" operation computes the squared magnitude or of each pixel of a complex image.

The "MatchCDF" operation performs a piecewise linear mapping of the pixel values of an image such that the Cumulative Distribution Function (CDF) of the destination image matches as closely as possible a specified Cumulative Distribution Function.

The Max operation takes two rendered or renderable images, and for every pair of pixels, one from each source image of the corresponding position and band, finds the maximum pixel value.

The "MaxFilter" operation is a non-linear filter which is useful for removing isolated lines or pixels while preserving the overall appearance of an image.

The Mean operation scans a specific region of a rendered image and computes the mean pixel value for each band within that region of the image.

The "MedianFilter" operation is a non-linear filter which is useful for removing isolated lines or pixels while preserving the overall appearance of an image.

The Min operation takes two rendered or renderable images, and for every pair of pixels, one from each source image of the corresponding position and band, finds the minimum pixel value.

The "MinFilter" operation is a non-linear filter which is useful for removing isolated lines or pixels while preserving the overall appearance of an image.

The "Mosaic" operation creates a mosaic of two or more source images. This operation could be used for example to assemble a set of overlapping geospatially rectified images into a contiguous image.

The "MultiplyComplex" operation multiplies two images representing complex data.

The MultiplyConst operation takes one rendered or renderable image and an array of double constants, and multiplies every pixel of the same band of the source by the constant from the corresponding array entry.

The Multiply operation takes two rendered or renderable source images, and multiplies every pair of pixels, one from each source image of the corresponding position and band.

The Not operation takes one rendered or renderable image, and performs bit-wise logical "not" on every pixel from every band of the source image.

The "Null" operation performs no processing.

The Or operation takes one rendered or renderable image and an array of integer constants, and performs a bit-wise logical "or" between every pixel in the same band of the source and the constant from the corresponding array entry.

The "OrderedDither" operation performs color quantization by finding the nearest color to each pixel in a supplied color cube and "shifting" the resulting index value by a pseudo-random amount determined by the values of a supplied dither mask.

The dither mask is supplied as an array of KernelJAI objects the length of which must equal the number of bands in the image.

The Or operation takes two rendered or renderable images, and performs bit-wise logical "or" on every pair of pixels, one from each source image of the corresponding position and band.

The Overlay operation takes two rendered or renderable source images, and overlays the second source image on top of the first source image.

The "Pattern" operation defines a tiled image consisting of a repeated pattern.

The destination image of the "PeriodicShift" operation is the infinite periodic extension of the source image with horizontal and vertical periods equal to the image width and height, respectively, shifted by a specified amount along each axis and clipped to the bounds of the source image.

The "Phase" operation computes the phase angle of each pixel of a complex image.

The "Piecewise" operation performs a piecewise linear mapping of the pixel values of an image.

The "PNG" operation reads a standard PNG version 1.1 input stream. The PNG (Portable Network Graphics) specification may be found at http://www.cdrom.com/pub/png/spec.

The "PNG" operation implements the entire PNG specification, but provides access only to the final, high-resolution version of interlaced images.

The second parameter contains an instance of PNGDecodeParam to be used during the decoding. It may be set to null in order to perform default decoding, or equivalently may be omitted.

The documentation for PNGDecodeParam describes the possible output formats of PNG images after decoding.

The classes in the com.sun.media.jai.codec package are not a committed part of the JAI API.

The "PNM" operation reads a standard PNM file, including PBM, PGM, and PPM images of both ASCII and raw formats.

The "PolarToComplex" operation creates an image with complex-valued pixels from two images the respective pixel values of which represent the magnitude (modulus) and phase of the corresponding complex pixel in the destination image.

In renderable image mode the "Renderable" operation produces from a RenderedImage source a RenderableImage consisting of a "pyramid" of RenderedImages at progressively lower resolutions.

The "Rescale" operation takes a rendered or renderable source image and maps the pixel values of an image from one range to another range by multiplying each pixel value by one of a set of constants and then adding another constant to the result of the multiplication.

The Stream operation produces an image by decoding data from a SeekableStream.

The SubtractConst operation takes one rendered or renderable source image and an array of double constants, and subtracts a constant from every pixel of its corresponding band of the source.

The Subtract operation takes two rendered or renderable images, and for every pair of pixels, one from each source image of the corresponding position and band, subtracts the pixel from the second source from the pixel from the first source.

The SubtractFromConst operation takes one rendered or renderable image and an array of double constants, and subtracts every pixel of the same band of the source from the constant from the corresponding array entry.

The Threshold operation takes one rendered image, and maps all the pixels of this image whose value falls within a specified range to a specified constant.

The "TIFF" operation reads TIFF data from a SeekableStream.

TIFF version 6.0 was finalized in June, 1992.

An OperationDescriptor describing the "UnsharpMask" operation.

Unsharp masking is derived from a photographic technique for improving the sharpness of images.

The URL operation creates an output image whose source is specified by a Uniform Resource Locator (URL).

The allowable formats are those registered with the com.sun.media.jai.codec.ImageCodec class.

The second parameter contains an instance of ImageDecodeParam to be used during the decoding. It may be set to null in order to perform default decoding, or equivalently may be omitted.

The classes in the com.sun.media.jai.codec package are not a committed part of the JAI API.

The XorConst operation takes one rendered or renderable image and an array of integer constants, and performs a bit-wise logical "xor" between every pixel in the same band of the source and the constant from the corresponding array entry.

The Xor operation takes two rendered or renderable images, and performs bit-wise logical "xor" on every pair of pixels, one from each source image of the corresponding position and band.