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LVLCLRINF

Summary

The LVLCLRINF structure contains color-leveling information for a specific color channel.

Syntax

typedef struct _LVLCLRINF 
{ 
   L_INT nMinInput; 
   L_INT nMaxInput; 
   L_INT nMinOutput; 
   L_INT nMaxOutput; 
   L_UINT uGamma; 
} LVLCLRINF, *pLVLCLRINF;

Members

nMinInput

Value that specifies the image's shadows to be mapped. Valid values are:

Bits per pixel	Values
8-bit	0 to 255
12-bit	0 to 4095
16-bit	0 to 65535
Signed images	-32768 to 32767

Any value greater than or equal to this will be considered a shadow and will be remapped to the value in nMinOutput.

nMaxInput

Value that specifies the image's highlights to be mapped. Valid values are:

Bits per pixel	Values
8-bit	0 to 255
12-bit	0 to 4095
16-bit	0 to 65535
Signed images	-32768 to 32767

Any value greater than or equal to this will be considered a highlight and will be remapped to the value in nMaxOutput.

nMinOutput

Value that specifies the value to which the shadows will be mapped. Valid values are:

Bits per pixel	Values
8-bit	0 to 255
12-bit	0 to 4095
16-bit	0 to 65535
Signed images	-32768 to 32767

nMaxOutput

Value that specifies the value to which the highlights will be mapped. Valid values are:

Bits per pixel	Values
8-bit	0 to 255
12-bit	0 to 4095
16-bit	0 to 65535
Signed images	-32768 to 32767

uGamma

Value that represents the gamma value. This value is used to modify the midtones of the image. The value in this member is a 100 times the actual value. Therefore, if uGamma = 167 then the actual gamma value is 1.67. Likewise, if you want to use a gamma of 1.75, set this member to 175. The default value is DEFAULT_GAMMA, which is 100 (actual gamma value of 1.00) which does not change the gamma value of the image.

Comments

The value of the nMaxInput member must be greater than the value of the nMinInputValue member by at least 2.

If nMinOutput > nMaxOutput then the image's shadows and highlights will be inverted for the given channel.

Usage

LVLCLR

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