Test Pattern Generators

Functions
void	impulse (image *src, U32 value)
	Set only the Center Pixel to a Value and the Rest to 0. More...
void	TestPattern1 (image *a)
	Draws a Test Pattern. More...
I32	TestPattern2 (image *a)
	Draws a Test Pattern. More...
I32	BayerTest (image *bayer, U32 r, U32 gr, U32 gb, U32 b)
	Set Bayer Image to a Constant Color Value. More...
I32	ColorBar (image *rgb, U32 amplitude, U32 saturation)
	Color Bar Test Chart. More...
I32	ColorGraph (image *dst, I32 y, I32 sat, I32 mode, F32 start_color)
	Color Graph Test Chart. More...
void	ChangeValue (I32 *ParValue, I32 Min, I32 Max, I32 Step, char *text)
	Interactive Parameter Input for Integers. More...
void	print_image (image *src)
	Prints Image Content as Hex Values to the Terminal. More...
void	print_imgvar (image *a)
	Prints Image Variable Information to the Terminal. More...
void	print_bits_U64 (U64 val)
	Prints out Bits and Hex Value of an U64 Variable. More...
void	wedge (image *a)
	Test Image of grey Wedges. More...

Detailed Description

Functions in this group provide test images and do syntax checking

Function Documentation

impulse()

void impulse	(	image *	src,
		U32	value
	)

This function sets an image of type IMAGE_GREY completely to zero except the pixel at the floored position ( src->dx/2, src->dy/2) to the color value.

TestPattern1()

void TestPattern1

(

image *

source

)

The Function draws a Test Pattern to an Image of Type IMAGE_GREY. The Test Pattern looks like this:

*      +--+--+------------------+--+--+
*      +--+--+------------------+--+--+
*      +--+--+------------------+--+--+
*      |  |  |                  |  |  |
*      |  |  |                  |  |  |
*      |  |  |        .         |  |  |
*      |  |  |                  |  |  |
*      |  |  |                  |  |  |
*      +--+--+------------------+--+--+
*      +--+--+------------------+--+--+
*      +--+--+------------------+--+--+
*  

TestPattern2()

I32 TestPattern2

(

image *

source

)

The Function draws a Test Pattern to an Image of Type IMAGE_GREY. The Test Pattern looks like this:

*    .    ....     
*                 
*      ..         
*      ..         
*                 
*    .    ....    
*    .    ....    
*    .    ....    
*    .    ....    
*  

BayerTest()

I32 BayerTest	(	image *	bayer,
		U32	r,
		U32	gr,
		U32	gb,
		U32	b
	)

The function writes a test pattern with constant color values into an image of type IMAGE_BAYER The bayer pattern is assumed to start with red:

R	Gr
Gb	B

wedge()

void wedge

(

image *

a

)

This function generates horizontal by one incrementing grey values. After reaching the grey value 255 it is reset to 0.

Parameters

a	Image to be filled.

ColorBar()

I32 ColorBar	(	image *	rgb,
		U32	amplitude,
		U32	saturation
	)

This function creates a color bar test chart with vertical bars of white, yellow, cyan, green, magenta, red, blue, black colors(from left to right). amplitude and saturation specify the values for the color bar amplitude and saturation. Allowed values range from 0 (zero amplitude, saturation) to 255 (maximum amplitude, saturation). The following tables may be helpful:

100% amplitude, 100% saturation amplitude = 255, saturation = 255

Channel		White	Yellow	Cyan	Green	Magenta	Red	Blue	Black
R		255	255	0	0	255	255	0	0
G		255	255	255	255	0	0	0	0
B		255	0	255	0	255	0	255	0
Y		255	226	179	150	105	76	29	0
Cb		128	0	171	44	212	85	255	128
Cr		128	149	0	21	235	255	107	128

75% amplitude, 75% saturation amplitude = 191, saturation = 191

Channel		White	Yellow	Cyan	Green	Magenta	Red	Blue	Black
R		191	191	47	47	191	191	47	47
G		191	191	191	191	47	47	47	47
B		191	47	191	47	191	47	191	47
Y		191	175	148	132	107	90	63	47
Cb		128	56	152	80	176	104	200	128
Cr		128	140	56	68	188	200	116	128

The image variable rgb may currently be of type IMAGE_RGB or IMAGE_CBCR444.

Returns

Standard Error Code.

See also

ColorGraph().

ColorGraph()

I32 ColorGraph	(	image *	dst,
		I32	y,
		I32	sat,
		I32	mode,
		float	start_color
	)

This function creates a color graph test chart showing all colors with constant luminance y and constant saturation sat. The colors are stored in the image described by image variable dst. They can be stored horizontally (i.e. different colors moving from left to right, but constant colors moving vertically) or vertically depending on the value of the parameter mode. A start color can be defined by start_color ranging from 0 to 2pi . Allowed values for y, sat range from 0 (zero amplitude, saturation) to 255 (maximum amplitude, saturation).

The image variable rgb may currently be of type IMAGE_RGB, IMAGE_CBCR444 or IMAGE_YUVNORM.

See also

ColorBar().

Return values

ERR_TYPE

if Image Type is not IMAGE_RGB, IMAGE_CBCR444 or IMAGE_YUVNORM.

ChangeValue()

void ChangeValue	(	I32 *	ParValue,
		I32	Min,
		I32	Max,
		I32	Step,
		char *	text
	)

This function provides a method to modify a value at the terminal by using cursor keys.

Parameters

ParValue	Pointer to Parameter for Input.
Min,Max	Minimum and Maximum Value.
Step	Increment Steps.
text	Text for Output.

print_image()

void print_image

(

image *

src

)

This function prints the image content as hex values to the terminal.

Parameters

src	The Source Image.

print_imgvar()

void print_imgvar

(

image *

src

)

This function prints the contents of the image variable struct to the terminal, including type, st, dx, dy, pitch, ccmp1, ccmp2.

Parameters

src	The Source Image.

print_bits_U64()

void print_bits_U64

(

U64

val

)

• This function prints out bits and hex value of an U64 variable (or other with cast).