Definitions for an image block and associated functions. More...

#include <jwsc/config.h>
#include <stdlib.h>
#include <inttypes.h>
#include <math.h>
#include <assert.h>
#include "jwsc/base/error.h"
#include "jwsc/matblock/matblock.h"
#include "jwsc/image/image.h"
#include "jwsc/imgblock/imgblock.h"

Include dependency graph for imgblock.c:

Go to the source code of this file.

Functions
create_imgblock
Creates an image block.
void	create_imgblock_f (Imgblock_f **img_out, uint32_t num_imgs, uint32_t num_rows, uint32_t num_cols)
	Creates a single precision floating point image block.
create_init_imgblock
Creates and initializes an image block.
void	create_init_imgblock_f (Imgblock_f **img_out, uint32_t num_imgs, uint32_t num_rows, uint32_t num_cols, Pixel_f val)
	Creates and initializes a single precision floating point image block.
create_zero_imgblock
Creates an image block and initializes it with zeros.
void	create_zero_imgblock_f (Imgblock_f **img_out, uint32_t num_imgs, uint32_t num_rows, uint32_t num_cols)
	Creates a single precision floating point image block and initializes it with zeros.
create_random_imgblock_f
Creates an image block initializes it with random values.
void	create_random_imgblock_f (Imgblock_f **img_out, uint32_t num_imgs, uint32_t num_rows, uint32_t num_cols, Pixel_f min, Pixel_f max)
	Creates a single precision floating point image block and initializes it with random values.
create_imgblock_from_matblocks
Creates an image block from three matrix blocks.
Error *	create_imgblock_from_matblocks_f (Imgblock_f *img_out, const Matblock_f m_r, const Matblock_f m_g, const Matblock_f m_b)
	Creates a single precision floating point image block from three matrix blocks.
create_imgblock_from_matblock
Creates a grayscale image block from a matrix block.
void	create_imgblock_from_matblock_f (Imgblock_f *img_out, const Matblock_f m)
	Creates a single precision floating point grayscale image block from a matrix block.
create_matblocks_from_imgblock
Creates three matrix blocks from an image block.
void	create_matblocks_from_imgblock_f (Matblock_f m_r_out, Matblock_f m_g_out, Matblock_f *m_b_out, const Imgblock_f img)
	Creates three single precision floating point matrix blocks from an image block.
create_matblock_from_imgblock
Creates an averaged matrix block from an image block.
void	create_matblock_from_imgblock_f (Matblock_f *m_out, const Imgblock_f img, float r_weight, float g_weight, float b_weight)
	Creates an averaged single precision floating point matrix block from an image block.
copy_imgblock
Copies an image block.
void	copy_imgblock_f (Imgblock_f *img_out, const Imgblock_f img_in)
	Copies a single precision floating point image block.
copy_image_into_imgblock
Copies an image into a imgblock.
Error *	copy_image_into_imgblock_f (Imgblock_f *ib_out, const Imgblock_f ib_in, const Image_f *i, Imgblock_image orient, uint32_t index)
	Copies a single precision floating point image into an image block.
copy_image_from_imgblock
Copies an image from an imgblock.
Error *	copy_image_from_imgblock_f (Image_f *img_out, const Imgblock_f img_blk, Imgblock_image orient, uint32_t index)
	Copies a single precision floating point image from and image block.
free_imgblock
Frees an image block.
void	free_imgblock_f (Imgblock_f *img)
	Frees a single precision floatin point image block.

Detailed Description

Definitions for an image block and associated functions.

Author:: Joseph Schlecht

License:: Creative Commons BY-NC-SA 3.0

The image holds single precision floating point pixel elements.

Although the image is indexed by image, row, and column, the pixels are allocated as a 1D array in row-major order. So iterating over the pixels can be done inside a single loop.

Definition in file imgblock.c.

Function Documentation

void create_imgblock_f	(	Imgblock_f **	img_out,
		uint32_t	num_imgs,
		uint32_t	num_rows,
		uint32_t	num_cols
	)

Creates a single precision floating point image block.

Parameters:

img_out	Result parameter. If *img_out is NULL, an image block is allocated; otherwise its space is re-used.
num_imgs	Number of images in the image block.
num_rows	Number of rows in the image block.
num_cols	Number of columns in the image block.

Note:: Dimensions must be > 0.

Definition at line 86 of file imgblock.c.

void create_init_imgblock_f	(	Imgblock_f **	img_out,
		uint32_t	num_imgs,
		uint32_t	num_rows,
		uint32_t	num_cols,
		Pixel_f	val
	)

Creates and initializes a single precision floating point image block.

Parameters:

img_out	Result parameter. If *img_out is NULL, an image block is allocated; otherwise its space is re-used.
num_imgs	Number of images in the image block.
num_rows	Number of rows in the image block.
num_cols	Number of columns in the image block.
val	Pixel value to initialize all pixels of the image block with.

Note:: Dimensions must be > 0.

Definition at line 165 of file imgblock.c.

void create_zero_imgblock_f	(	Imgblock_f **	img_out,
		uint32_t	num_imgs,
		uint32_t	num_rows,
		uint32_t	num_cols
	)

Creates a single precision floating point image block and initializes it with zeros.

Parameters:

img_out	Result parameter. If *img_out is NULL, an image block is allocated; otherwise its space is re-used.
num_imgs	Number of images in the image block.
num_rows	Number of rows in the image block.
num_cols	Number of columns in the image block.

Note:: Dimensions must be > 0.

Definition at line 209 of file imgblock.c.

void create_random_imgblock_f	(	Imgblock_f **	img_out,
		uint32_t	num_imgs,
		uint32_t	num_rows,
		uint32_t	num_cols,
		Pixel_f	min,
		Pixel_f	max
	)

Creates a single precision floating point image block and initializes it with random values.

Calls rand() to generate the random numbers.

Parameters:

img_out	Result parameter. If *img_out is NULL, an image block is allocated; otherwise its space is re-used.
num_imgs	Number of images in the image block.
num_rows	Number of rows in the image block.
num_cols	Number of columns in the image block.
min	Minimum random value.
max	Maximum random value.

Note:: Dimensions must be > 0.; Since Pixel_f samples range [0,1], min and max should be in that range as well so a meaningful image block is created.

Warning:: Does not check min and max to see if they would cause overflow.

Definition at line 253 of file imgblock.c.

Error* create_imgblock_from_matblocks_f	(	Imgblock_f **	img_out,
		const Matblock_f *	m_r,
		const Matblock_f *	m_g,
		const Matblock_f *	m_b
	)

Creates a single precision floating point image block from three matrix blocks.

Parameters:

img_out	Result parameter. If *img_out is NULL, an image block is allocated; otherwise its space is re-used.
m_r	Matrix block to copy into the red samples of the image block.
m_g	Matrix block to copy into the green samples of the image block.
m_b	Matrix block to copy into the blue samples of the image block.

Returns:

On success, NULL is returned. On error, an Error is returned and *img_out is freed and set to NULL.

ERROR_INV_ARG Matrix blocks do not have the same dimensions.

Definition at line 310 of file imgblock.c.

void create_imgblock_from_matblock_f	(	Imgblock_f **	img_out,
		const Matblock_f *	m
	)

Creates a single precision floating point grayscale image block from a matrix block.

Parameters:

img_out	Result parameter. If *img_out is NULL, an image block is allocated; otherwise its space is re-used.
m	Matrix block to copy into the red, green and blue samples of the image.

Definition at line 370 of file imgblock.c.

void create_matblocks_from_imgblock_f	(	Matblock_f **	m_r_out,
		Matblock_f **	m_g_out,
		Matblock_f **	m_b_out,
		const Imgblock_f *	img
	)

Creates three single precision floating point matrix blocks from an image block.

Parameters:

m_r_out	Result parameter. Red sample matrix block. If *m_r_out is NULL, an image block is allocated; otherwise its space is re-used.
m_g_out	Result parameter. Green sample matrix block. If *m_g_out is NULL, an image block is allocated; otherwise its space is re-used.
m_b_out	Result parameter. Blue sample matrix block. If *m_b_out is NULL, an image block is allocated; otherwise its space is re-used.
img	Image block to copy into the matrix blocks.

Definition at line 403 of file imgblock.c.

void create_matblock_from_imgblock_f	(	Matblock_f **	m_out,
		const Imgblock_f *	img,
		float	r_weight,
		float	g_weight,
		float	b_weight
	)

Creates an averaged single precision floating point matrix block from an image block.

The weights are normalized to sum to one.

Parameters:

m_out	Result parameter. If *m_out is NULL, a matrix block is allocated; otherwise its space is re-used.
img	Image block to copy into the matrix block.
r_weight	Weight of the red sample.
g_weight	Weight of the green sample.
b_weight	Weight of the blue sample.

Note:: Weights must be non-negative.

Definition at line 461 of file imgblock.c.

void copy_imgblock_f	(	Imgblock_f **	img_out,
		const Imgblock_f *	img_in
	)

Copies a single precision floating point image block.

Parameters:

img_out	Result parameter. If *img_out is NULL, an image block is allocated; otherwise its space is re-used.
img_in	Image block to copy.

Definition at line 516 of file imgblock.c.

Error* copy_image_into_imgblock_f	(	Imgblock_f **	ib_out,
		const Imgblock_f *	ib_in,
		const Image_f *	i,
		Imgblock_image	orient,
		uint32_t	index
	)

Copies a single precision floating point image into an image block.

Parameters:

ib_out	Result parameter. If *ib_out is NULL, a image block is allocated; otherwise its space is re-used.
ib_in	Image block to copy a image into.
i	Image to copy into the image block.
orient	Orientation of the image to copy into the image block.
index	Index along the orientation dimension to copy the image into the image block.

Returns:

On success, NULL is returned. On error, an Error is returned and *ib_out is freed and set to NULL (if it is not ib_in).

ERROR_INV_ARG index is not a valid for the specified orientation dimension.

Note:: If *ib_out == ib_in, then ib_in is overwritten.

Definition at line 566 of file imgblock.c.

Error* copy_image_from_imgblock_f	(	Image_f **	img_out,
		const Imgblock_f *	img_blk,
		Imgblock_image	orient,
		uint32_t	index
	)

Copies a single precision floating point image from and image block.

Parameters:

img_out	Result parameter. If *img_out is NULL, an image is allocated; otherwise its space is re-used.
img_blk	Image block to copy an image from.
orient	Orientation of the image to copy from the image block.
index	Index along the orientation dimension to copy the image from the image block.

Returns:

On success, NULL is returned. On error, an Error is returned and *img_out is freed and set to NULL.

ERROR_INV_ARG index is not a valid for the specified orientation dimension.

Definition at line 675 of file imgblock.c.

void free_imgblock_f ( Imgblock_f * img )

Frees a single precision floatin point image block.

Parameters:

img	Image block to free.

Definition at line 763 of file imgblock.c.

Functions

Detailed Description

Function Documentation