#include "l_bitmap.h"

L_LTIMGEFX_API L_INT L_DeinterlaceBitmap(pBitmap, uFlags)


pointer to the bitmap handle

L_UINT uFlags;


Deinterlaces a video source image.

Parameter Description
pBitmap Pointer to the bitmap handle referencing the bitmap to be changed.
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.
  The following are the flags that indicate how to deinterlace the image:
  Value Meaning
  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.
  The following are the flags that indicate whether to remove odd or even lines:
  Value Meaning
  DEINTERLACE_ODD [0x0010] Remove the odd lines.
  DEINTERLACE_EVEN [0x0020] Remove the even lines.



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


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


Win32, x64, Linux.

See Also


L_BinaryFilterBitmap, L_PixelateBitmap, L_SharpenBitmap, L_PosterizeBitmap, L_MosaicBitmap, L_EmbossBitmap, L_AverageFilterBitmap, L_MedianFilterBitmap, L_AddBitmapNoise, L_IntensityDetectBitmap, L_SpatialFilterBitmap, L_MaxFilterBitmap, L_MinFilterBitmap, L_OilifyBitmap, L_SolarizeBitmap, L_WindowLevel , L_AutoColorLevelBitmap, L_ColorLevelBitmap, L_CorrelationBitmap, L_GrayScaleToDuotone, L_GrayScaleToMultitone, L_HolesRemovalBitmapRgn, L_SelectiveColorBitmap, L_SkeletonBitmap, L_FragmentBitmap, L_HighPassFilterBitmap, L_UnsharpMaskBitmap


Raster Image Functions: Modifying Intensity Values


Removing Noise


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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