In This Topic ▼

LVLCLRINF

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

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

Members

nMinInput

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

0 to 255 for 8-bit
0 to 4095 for 12-bit
0 to 65535 for 16-bit images
-32768 to 32767 for signed images

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 range from:

0 to 255 for 8-bit
0 to 4095 for 12-bit
0 to 65535 for 16-bit images
-32768 to 32767 for signed images

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 range from:

0 to 255 for 8-bit
0 to 4095 for 12-bit
0 to 65535 for 16-bit images
-32768 to 32767 for signed images

nMaxOutput

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

0 to 255 for 8-bit
0 to 4095 for 12-bit
0 to 65535 for 16-bit images
-32768 to 32767 for signed images

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.