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mlib_imageextrema2_fp(3mlib) [opensolaris man page]

mlib_ImageExtrema2(3MLIB)				    mediaLib Library Functions					 mlib_ImageExtrema2(3MLIB)

NAME
mlib_ImageExtrema2, mlib_ImageExtrema2_Fp - image extrema SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageExtrema2(mlib_s32 *min, mlib_s32 *max, const mlib_image *img, mlib_s32 xStart, mlib_s32 yStart, mlib_s32 xPeriod, mlib_s32 yPeriod); mlib_status mlib_ImageExtrema2_Fp(mlib_d64 *min, mlib_d64 *max, const mlib_image *img, mlib_s32 xStart, mlib_s32 yStart, mlib_s32 xPeriod, mlib_s32 yPeriod); DESCRIPTION
Each of the functions determines the extrema values for each channel in an image, possibly with subsampling. It uses the following equation: min[i] = MIN{ img[x][y][i] } max[i] = MAX{ img[x][y][i] } where x = xStart + p*xPeriod; 0 <= p < (w - xStart)/xPeriod y = yStart + q*yPeriod; 0 <= q < (h - yStart)/yPeriod PARAMETERS
Each of the functions takes the following arguments: min Pointer to minimum vector, where length is the number of channels in the image. min[i] contains the minimum of channel i. max Pointer to maximum vector, where length is the number of channels in the image. max[i] contains the maximum of channel i. img Pointer to a source image. xStart Initial X sample coordinate. yStart Initial Y sample coordinate. xPeriod X sample rate. xPeriod >= 1. yPeriod Y sample rate. yPeriod >= 1. 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_ImageExtremaLocations(3MLIB), mlib_ImageMaximum(3MLIB), mlib_ImageMaximum_Fp(3MLIB), mlib_ImageMinimum(3MLIB), mlib_ImageMini- mum_Fp(3MLIB), attributes(5) SunOS 5.11 2 Mar 2007 mlib_ImageExtrema2(3MLIB)

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mlib_ImageHistogram2(3MLIB)				    mediaLib Library Functions				       mlib_ImageHistogram2(3MLIB)

NAME
mlib_ImageHistogram2 - histogram SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageHistogram2(mlib_s32 **histo, const mlib_image *img, const mlib_s32 *numBins, const mlib_s32 *lowValue, const mlib_s32 *highValue, mlib_s32 xStart, mlib_s32 yStart, mlib_s32 xPeriod, mlib_s32 yPeriod); DESCRIPTION
The mlib_ImageHistogram2() function creates a histogram by scanning an image, counting the number of pixels within a given range for each channel of the image, and then generating a histogram. The image can have 1, 2, 3 or 4 channels. The data type of the image can be MLIB_BYTE, MLIB_SHORT, MLIB_USHORT, or MLIB_INT. The histogram must have the same number of channels as the image has. One entry of the histogram, or a bin, is used to accumulate the number of pixels within a certain sub-range. The legal pixel range and the number of bins may be controlled separately. If binWidth is defined as (highValue - lowValue )/numBins then bin i counts pixel values in the following range: lowValue + i*binWidth <= x < lowValue + (i + 1)*binWidth The set of pixels scanned may furthermore be reduced by specifying xPeriod and yPeriod parameters that specify the sampling rate along each axis. The set of pixels to be accumulated may be obtained from the following equation: x = xStart + p*xPeriod; 0 <= p < (w - xStart)/xPeriod y = yStart + q*yPeriod; 0 <= q < (h - yStart)/yPeriod It is the user's responsibility to clear the histogram table before this function is called and to ensure that the histogram table supplied is suitable for the source image and the parameters. Otherwise, the result of this function is undefined. The range from lowValue[k] to (highValue[k] - 1) must be a valid subrange of the image type range. PARAMETERS
The function takes the following arguments: histo Pointer to histogram. The format of the histogram is histo[channel][index]. The index values for channel i can be 0, 1, ..., numBins[i]-1. img Pointer to source image. numBins The number of bins for each channel of the image. lowValue The lowest pixel value checked for each channel. highValue The highest pixel value checked for each channel. When counting the pixel values, highValue is not included. xStart The initial X sample coordinate. yStart The initial Y sample coordinate. xPeriod The X sampling rate. xPeriod >= 1. yPeriod The Y sampling rate. yPeriod >= 1. 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_ImageHistogram(3MLIB), attributes(5) SunOS 5.11 2 Mar 2007 mlib_ImageHistogram2(3MLIB)

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