Lut

Warped image management. More...

Collaboration diagram for Lut:

Data Structures
struct	sb_t_lut_point
	Struct that defines the coordinates of a point of a lut. More...

Macros
#define	SB_LUT_POINT_NOT_EXIST   0xFFFF
	Special value to identify coordinates of not existing points. More...

Functions
sb_t_err	sb_lut_create (SB_HANDLE *phandle, int width, int height)
	Creates the handle of the lut. More...
sb_t_err	sb_lut_destroy (SB_HANDLE *phandle)
	Destroys the handle of the lut. More...
sb_t_err	sb_lut_get_ptr (SB_HANDLE phandle, sb_t_lut_point **const ptr)
	Retrieves, in the parameter ptr, the pointer to internal array of the lut. More...
sb_t_err	sb_lut_get_size (SB_HANDLE phandle, int *const width, int *const height)
	Retrieves the size of the lut. More...
sb_t_err	sb_lut_save (SB_HANDLE phandle, const char *const file_path)
	Saves the lut in a file. More...
sb_t_err	sb_lut_load (SB_HANDLE *phandle, const char *const file_path)
	Loads the lut from a file. More...
sb_t_err	sb_lut_warp_point (SB_HANDLE phandle, const sb_t_point *const src, sb_t_point *const dst)
	Warps the point. More...

Detailed Description

Warped image management.

See Lut for more information.

Macro Definition Documentation

SB_LUT_POINT_NOT_EXIST

#define SB_LUT_POINT_NOT_EXIST   0xFFFF

Special value to identify coordinates of not existing points.

See also

sb_t_lut_point

Definition at line 7135 of file sb.h.

Function Documentation

sb_lut_create()

sb_t_err sb_lut_create	(	SB_HANDLE *	phandle,
		int	width,
		int	height
	)

Creates the handle of the lut.

The size of the lut should be set equal to the size of the corresponding image.

Parameters

[out]	phandle	Pointer to the handle of the lut. On successful return, this parameter will be updated with the pointer of the handle.
[in]	width	Width, in pixel of the lut.
[in]	height	Height, in pixel of the lut.

Returns

If successful, returns SB_ERR_NONE. Otherwise, it returns an error code sb_t_err.

See also

Lut

sb_lut_destroy

sb_lut_destroy()

sb_t_err sb_lut_destroy

(

SB_HANDLE *

phandle

)

Destroys the handle of the lut.

Parameters

[in,out]

phandle

Pointer to the handle. The function sets it to NULL.

Returns

If successful, returns SB_ERR_NONE. Otherwise, it returns an error code sb_t_err.

See also

Lut

sb_lut_create

sb_lut_get_ptr()

sb_t_err sb_lut_get_ptr	(	SB_HANDLE	phandle,
		sb_t_lut_point **const	ptr
	)

Retrieves, in the parameter ptr, the pointer to internal array of the lut.

The array has a number of elements equal to the image resolution = width * height, where width and height are the parameters passed to the function sb_lut_create.
The user should fill this array with a lut for each pixels of the image.

Attention

The user mustn't to deallocate this pointer.

Parameters

[in]	phandle	Handle of the lut.
[out]	ptr	Pointer to the lut array.

Returns

If successful, returns SB_ERR_NONE. Otherwise, it returns an error code sb_t_err.

See also

Lut

sb_lut_create

sb_lut_get_size()

sb_t_err sb_lut_get_size	(	SB_HANDLE	phandle,
		int *const	width,
		int *const	height
	)

Retrieves the size of the lut.

Parameters

[in]	phandle	Handle of the lut.
[out]	width	The parameter will be filled with the width, in pixel, of the lut.
[out]	height	The parameter will be filled with the height, in pixel, of the lut.

Returns

If successful, returns SB_ERR_NONE. Otherwise, it returns an error code sb_t_err.

See also

Lut

sb_lut_load()

sb_t_err sb_lut_load	(	SB_HANDLE *	phandle,
		const char *const	file_path
	)

Loads the lut from a file.

Parameters

[in,out]	phandle	Handle of the lut. On successful return, this parameter will be updated with the pointer of the handle. The handle must be destroyed with the function sb_lut_destroy.
[in]	file_path	String of the file name.

Returns

If successful, returns SB_ERR_NONE. Otherwise, it returns an error code sb_t_err.

See also

Lut

sb_lut_save

sb_lut_destroy

sb_lut_save()

sb_t_err sb_lut_save	(	SB_HANDLE	phandle,
		const char *const	file_path
	)

Saves the lut in a file.

Parameters

[in]	phandle	Handle of the lut.
[in]	file_path	String of the file name.

Returns

If successful, returns SB_ERR_NONE. Otherwise, it returns an error code sb_t_err.

See also

Lut

sb_lut_load

sb_lut_warp_point()

sb_t_err sb_lut_warp_point	(	SB_HANDLE	phandle,
		const sb_t_point *const	src,
		sb_t_point *const	dst
	)

Warps the point.

Because happens that not all the points of the lut were defined, in order to managed correctly the small holes, the functions searchs for the source point in the neighborhood of a matrix 5x5. This one usually occurs with lut from warped image to the original one. The error code SB_ERR_WARP_POINT_NOT_FOUND is returned if the function doesn't find the point in the lut.

Parameters

[in]	phandle	Handle of the lut.
[in]	src	Pointer to the source point.
[out]	dst	Pointer to the destination point.

Returns

If successful, returns SB_ERR_NONE. Otherwise, it returns an error code sb_t_err.

See also

Lut