mlib_imagecolorerrordiffusionmxn(3mlib) [sunos man page]
mlib_ImageColorErrorDiffusionMxN(3MLIB) mediaLib Library Functions mlib_ImageColorErrorDiffusionMxN(3MLIB) NAME
mlib_ImageColorErrorDiffusionMxN - true-color to indexed-color or grayscale to black-white conversion, using error diffusion SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageColorErrorDiffusionMxN(mlib_image *dst, const mlib_image *src, const mlib_s32 *kernel, mlib_s32 m, mlib_s32 n, mlib_s32 dm, mlib_s32 dn, mlib_s32 scale, const void *colormap); DESCRIPTION
The mlib_ImageColorErrorDiffusionMxN() function converts a 3-channel image to a 1-channel indexed image, or converts a 1-channel grayscale image to a 1-channel MLIB_BIT image, with the method of error diffusion. The src can be an MLIB_BYTE image with 1 or 3 channels. The dst must be a 1-channel MLIB_BIT or MLIB_BYTE image. The colormap must be created by mlib_ImageColorDitherInit(). It may or may not have a colorcube included. If it does, the colorcube is used. Otherwise, the general lookup table included in colormap is used. The kernel is required to have the following property: kernel[0] = kernel[1] = ... = kernel[m*dn+dm] = 0; kernel[m*dn+dm+1] + ... + kernel[m*n-1] = 2**scale; scale >= 0 PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src Pointer to source image. kernel Pointer to the error-distribution kernel, in row major order. m Kernel width. m > 1. n Kernel height. n > 1. dm X coordinate of the key element in the kernel. 0 <= dm < m. dn Y coordinate of the key element in the kernel. 0 <= dn < n. scale The scaling factor for kernel to convert the input integer coefficients into floating-point coefficients: floating-point coefficient = integer coefficient * 2**(-scale) colormap Internal data structure for image dithering. RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_ImageColorDitherInit(3MLIB), mlib_ImageColorDitherFree(3MLIB), mlib_ImageColorErrorDiffusion3x3(3MLIB), mlib_ImageColorOrdered- Dither8x8(3MLIB), mlib_ImageColorOrderedDitherMxN(3MLIB), attributes(5) SunOS 5.10 10 Nov 2004 mlib_ImageColorErrorDiffusionMxN(3MLIB)
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mlib_ImageConvMxNIndex(3MLIB) mediaLib Library Functions mlib_ImageConvMxNIndex(3MLIB) NAME
mlib_ImageConvMxNIndex - MxN convolution on a color indexed image SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageConvMxNIndex(mlib_image *dst, const mlib_image *src, const mlib_s32 *kernel, mlib_s32 m, mlib_s32 n, mlib_s32 dm, mlib_s32 dn, mlib_s32 scale, mlib_edge edge, const void *colormap); DESCRIPTION
The mlib_ImageConvMxNIndex() function performs a MxN convolution on the color indexed source image by using the user-supplied kernel. The input and output images must have the same image type and size. For this convolution, the key element of the convolution kernel is located at (dm, dn) of the kernel matrix. This function performs the convolution on a color indexed image. The input image and the output image must be single-channel images. The image type must be MLIB_BYTE or MLIB_SHORT. It uses the following equation: m-1-dm n-1-dn dst[x][y][i] = SUM SUM src[x+p][y+q][i]*k[p][q]*2**(-scale) p=-dm q=-dn where m > 1, n > 1, 0 <= dm < m, 0 <= dn < n. PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src Pointer to source image. kernel Pointer to the convolution kernel, in row major order. m Width of the convolution kernel. m > 1. n Height of the convolution kernel. n > 1. dm X coordinate of the key element in the convolution kernel. 0 <= dm < m. dn Y coordinate of the key element in the convolution kernel. 0 <= dn < n. scale Scaling factor. edge Type of edge condition. It can be one of the following: MLIB_EDGE_DST_NO_WRITE MLIB_EDGE_DST_FILL_ZERO MLIB_EDGE_DST_COPY_SRC MLIB_EDGE_SRC_EXTEND colormap Internal data structure for inverse color mapping. This data structure is generated by the mlib_ImageColorTrue2IndexInit() function. RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_ImageConv2x2(3MLIB), mlib_ImageConv2x2_Fp(3MLIB), mlib_ImageConv2x2Index(3MLIB), mlib_ImageConv3x3(3MLIB), mlib_Image- Conv3x3_Fp(3MLIB), mlib_ImageConv3x3Index(3MLIB), mlib_ImageConv4x4(3MLIB), mlib_ImageConv4x4_Fp(3MLIB), mlib_ImageConv4x4Index(3MLIB), mlib_ImageConv5x5(3MLIB), mlib_ImageConv5x5_Fp(3MLIB), mlib_ImageConv5x5Index(3MLIB), mlib_ImageConv7x7(3MLIB), mlib_Image- Conv7x7_Fp(3MLIB), mlib_ImageConv7x7Index(3MLIB), mlib_ImageConvKernelConvert(3MLIB), mlib_ImageConvMxN(3MLIB), mlib_ImageCon- vMxN_Fp(3MLIB), mlib_ImageConvolveMxN(3MLIB), mlib_ImageConvolveMxN_Fp(3MLIB), mlib_ImageSConv3x3(3MLIB), mlib_ImageSConv3x3_Fp(3MLIB), mlib_ImageSConv5x5(3MLIB), mlib_ImageSConv5x5_Fp(3MLIB), mlib_ImageSConv7x7(3MLIB), mlib_ImageSConv7x7_Fp(3MLIB), mlib_ImageSConvKernelCon- vert(3MLIB), attributes(5) SunOS 5.11 2 Mar 2007 mlib_ImageConvMxNIndex(3MLIB)