#include "l_bitmap.h"

L_LTIMGEFX_API L_INT L_DeinterlaceBitmap(pBitmap, uFlags)

Deinterlaces a video source image.



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

L_UINT uFlags

Flags that indicate how to deinterlace the image and whether to remove odd lines or even lines. You can use a bit wise OR (|) to specify one flag from each group.

Value Meaning
How to deinterlace the image:
DEINTERLACE_NORMAL [0x0001]Deinterlace the image by copying the data line into the removed lines.
DEINTERLACE_SMOOTH [0x0002] Deinterlace the image by averaging the data lines and copying the averaged data into the removed lines.
Removing odd or even lines:
DEINTERLACE_ODD [0x0010] Remove the odd lines.
DEINTERLACE_EVEN [0x0020] Remove the even lines.


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


This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

This function deinterlaces video source images by removing the black lines. It proceeds by merging lines in the image and/or blending them. Different options are available according to the value of uFlags.

This function does not work with regions.

This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available in the Document and Medical Imaging toolkits.

To update a status bar or detect a user interrupt during execution of this function, refer to L_SetStatusCallback.

This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

Required DLLs and Libraries


Win32, x64, Linux.

See Also




The following loads a bitmap and applies the deinterlace function to it:

L_INT DeinterlaceBitmapExample(L_VOID) 
   L_INT nRet; 
   BITMAPHANDLE LeadBitmap;   /* Bitmap handle to hold the loaded image. */ 
   /* Load the bitmap, keeping the bits per pixel of the file */ 
   nRet = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("interlaced_footage.jpg")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
   if(nRet !=SUCCESS) 
      return nRet; 
   /* remove odd lines smoothly */ 
   nRet = L_DeinterlaceBitmap(&LeadBitmap, DEINTERLACE_SMOOTH | DEINTERLACE_ODD); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL); 
   if(nRet !=SUCCESS) 
      return nRet; 
   //free bitmap  
   return SUCCESS; 

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