L_ImgKrnInvertImage

#include "ltimgkrn.h"

L_LTIMGKRN_API L_INT L_ImgKrnInvertImage(bitmap)

Inverts the colors in the specified bitmap, giving it the appearance of a photographic negative.

Parameters

BITMAPHANDLE *bitmap

Pointer to the bitmap handle referencing the bitmap to be processed.

Returns

Value	Meaning
SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Required DLLs and Libraries

LTIMGKRN
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64, Linux.

Functions

L_ImgKrnCopyImage
L_ImgKrnCreateImage
L_ImgKrnCropImage
L_ImgKrnDetectDocument
L_ImgKrnDetectGlare
L_ImgKrnFromYUV
L_ImgKrnManualPerspectiveCorrection
L_ImgKrnRotateFlipImage
L_ImgKrnSignalToNoiseRatio

Topics

Raster Image Functions: Correcting Colors

Example

This example loads a bitmap and inverts it.

L_INT KrnInvertImageExample(L_VOID) 
{ 
   L_INT ret; 
   BITMAPHANDLE bitmap;   /* Bitmap handle to hold the loaded image. */ 
 
   /* Load the bitmap */ 
   ret = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("cannon.jpg")), &bitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
   if (ret != SUCCESS) 
      return ret; 
 
   /* Invert the image colors */ 
   ret = L_ImgKrnInvertImage(&bitmap); 
   if (ret == SUCCESS) 
      ret = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &bitmap, FILE_BMP, 24, 0, NULL); 
 
   L_FreeBitmap(&bitmap); 
 
   return ret; 
}