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Data Structures | |
struct | _imStats |
Typedefs | |
typedef struct _imStats | imStats |
Functions | |
float | imCalcRMSError (const imImage *image1, const imImage *image2) |
float | imCalcSNR (const imImage *src_image, const imImage *noise_image) |
unsigned long | imCalcCountColors (const imImage *image) |
void | imCalcHistogram (const unsigned char *data, int count, unsigned long *histo, int cumulative) |
void | imCalcUShortHistogram (const unsigned short *data, int count, unsigned long *histo, int cumulative) |
void | imCalcGrayHistogram (const imImage *image, unsigned long *histo, int cumulative) |
void | imCalcImageStatistics (const imImage *image, imStats *stats) |
void | imCalcHistogramStatistics (const imImage *image, imStats *stats) |
void | imCalcHistoImageStatistics (const imImage *image, int *median, int *mode) |
Calculates the RMS error between two images (Root Mean Square Error).
im.CalcRMSError(image1: imImage, image2: imImage) -> rms: number [in Lua 5]
Calculates the SNR of an image and its noise (Signal Noise Ratio).
im.CalcSNR(src_image: imImage, noise_image: imImage) -> snr: number [in Lua 5]
unsigned long imCalcCountColors | ( | const imImage * | image | ) |
Count the number of different colors in an image.
Image must be IM_BYTE, but all color spaces except IM_CMYK.
im.CalcCountColors(image: imImage) -> count: number [in Lua 5]
void imCalcHistogram | ( | const unsigned char * | data, | |
int | count, | |||
unsigned long * | histo, | |||
int | cumulative | |||
) |
Calculates the histogram of a IM_BYTE data.
Histogram is always 256 positions long.
When cumulative is different from zero it calculates the cumulative histogram.
im.CalcHistogram(image: imImage, plane: number, cumulative: boolean) -> histo: table of numbers [in Lua 5]
Where plane is the depth plane to calculate the histogram.
The returned table is zero indexed. image can be IM_USHORT or IM_BYTE.
void imCalcUShortHistogram | ( | const unsigned short * | data, | |
int | count, | |||
unsigned long * | histo, | |||
int | cumulative | |||
) |
Calculates the histogram of a IM_USHORT data.
Histogram is always 65535 positions long.
When cumulative is different from zero it calculates the cumulative histogram.
Use imCalcHistogram in Lua.
void imCalcGrayHistogram | ( | const imImage * | image, | |
unsigned long * | histo, | |||
int | cumulative | |||
) |
Calculates the gray histogram of an image.
Image must be IM_BYTE/(IM_RGB, IM_GRAY, IM_BINARY or IM_MAP).
If the image is IM_RGB then the histogram of the luma component is calculated.
Histogram is always 256 positions long.
When cumulative is different from zero it calculates the cumulative histogram.
im.CalcGrayHistogram(image: imImage, cumulative: boolean) -> histo: table of numbers [in Lua 5]
Calculates the statistics about the image data.
There is one stats for each depth plane. For ex: stats[0]=red stats, stats[0]=green stats, ...
Supports all data types except IM_CFLOAT.
im.CalcImageStatistics(image: imImage) -> stats: table [in Lua 5]
Table contains the following fields: max, min, positive, negative, zeros, mean, stddev. The same as the imStats structure.
Calculates the statistics about the image histogram data.
There is one stats for each depth plane. For ex: stats[0]=red stats, stats[0]=green stats, ...
Only IM_BYTE images are supported.
im.CalcHistogramStatistics(image: imImage) -> stats: table [in Lua 5]
void imCalcHistoImageStatistics | ( | const imImage * | image, | |
int * | median, | |||
int * | mode | |||
) |
Calculates some extra statistics about the image histogram data.
There is one stats for each depth plane.
Only IM_BYTE images are supported.
mode will be -1 if more than one max is found.
im.CalcHistoImageStatistics(image: imImage) -> median: number, mode: number [in Lua 5]