Query: mlib_imageconv4x4
OS: opensolaris
Section: 3mlib
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mlib_ImageConv4x4(3MLIB) mediaLib Library Functions mlib_ImageConv4x4(3MLIB)NAMEmlib_ImageConv4x4 - 4x4 convolutionSYNOPSIScc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageConv4x4(mlib_image *dst, const mlib_image *src, const mlib_s32 *kernel, mlib_s32 scale, mlib_s32 cmask, mlib_edge edge);DESCRIPTIONThe mlib_ImageConv4x4() function performs a 4x4 convolution on the source image by using the user-supplied kernel. The input image and the output image must have the same image type and have the same number of channels. The unselected channels in the output image are not overwritten. For single-channel images, the channel mask is ignored. For this convolution, the key element of the convolution kernel is located at (1, 1) of the kernel matrix. 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 = 4, n = 4, dm = (m - 1)/2 = 1, dn = (n - 1)/2 = 1.PARAMETERSThe 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. scale Scaling factor. cmask Channel mask to indicate the channels to be convolved, each bit of which represents a channel in the image. The channels corre- sponding to bits with a value of 1 are those to be processed. For a single-channel image, the channel mask is ignored. 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_EXTENDRETURN VALUESThe function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.ATTRIBUTESSee attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+SEE ALSOmlib_ImageConv2x2(3MLIB), mlib_ImageConv2x2_Fp(3MLIB), mlib_ImageConv2x2Index(3MLIB), mlib_ImageConv3x3(3MLIB), mlib_Image- Conv3x3_Fp(3MLIB), mlib_ImageConv3x3Index(3MLIB), mlib_ImageConv4x4_Fp(3MLIB), mlib_ImageConv4x4Index(3MLIB), mlib_ImageConv5x5(3MLIB), mlib_ImageConv5x5_Fp(3MLIB), mlib_ImageConv5x5Index(3MLIB), mlib_ImageConv7x7(3MLIB), mlib_ImageConv7x7_Fp(3MLIB), mlib_Image- Conv7x7Index(3MLIB), mlib_ImageConvKernelConvert(3MLIB), mlib_ImageConvMxN(3MLIB), mlib_ImageConvMxN_Fp(3MLIB), mlib_ImageConvMxNIn- dex(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_ImageConv4x4(3MLIB)