Creates a mosaic effect on an image by dividing an image into rectangular or arc-shaped cells with irregular boundaries and modifying the color of each cell.


#include "ltwrappr.h"

L_INT LBitmap::MosaicTiles(pMosaicTilesInfo, uFlags = 0)



Pointer to the MOSAICTILESINFO structure that contains information about the required effect.

L_UINT32 uFlags

Reserved for future use. Must be 0.


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


This function makes an image look like a mosaic made from tiles. Tiles can be rectangular or arc-shaped, depending upon the coordinate system used to draw the tiles. The function's many parameters control factors like the border color, tile color, pen width, tile width and height, etc.

For an example, click here

Use the LBitmap::Mosaic function to impose a mosaic effect on a bitmap by dividing the bitmap into square blocks of a specified size and changing the color of all pixels in each block to the average color of pixels within the block.

Use the LBitmap::Pixelate function to divide the bitmap into rectangular or arc-shaped cells and then recreate the image by filling those cells with the minimum, maximum, or average pixel value, depending upon the effect that was selected.

Use the LBitmap::RomanMosaic function to divide the bitmap into rectangular or arc-shaped cells and then fill them with a color chosen randomly from the colors of the tiles pixels.

Use the LBitmap::Pointillist function to convert image colors into randomly placed dots to create a pointillist painting, using a background color to fill the area between dots.

This function can process the whole image or a region of the image. If a bitmap has a region, the effect is applied only to the region.

Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.

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

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 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.

Mosaic Tiles Segment Function - Before

Mosaic Tiles Segment Function - Before

Mosaic Tiles Segment Function - After

Mosaic Tiles Segment Function - After

View additional platform support for this Mosaic Tiles Segment function.

Required DLLs and Libraries


Win32, x64.

See Also




L_INT LBitmap__MosaicTilesExample(LBitmapWindow m_LBitmapWnd) 
   L_INT nRet; 
   MOSAICTILESINFO MosaicInfo;   /* Structure which store the required parameters*/ 
   LBitmap LeadBitmap; 
   nRet =LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("ImageProcessingDemo\\Image2.jpg")), 0,ORDER_BGR); 
   if(nRet !=SUCCESS) 
      return nRet; 
   /*Fill the structures with the required parameters, the effect is applied using rectangular tiles,   with black border color*/ 
   MosaicInfo.uStructSize = sizeof(MOSAICTILESINFO); 
   MosaicInfo.crBorderColor = RGB(0, 0, 0); 
   MosaicInfo.crTilesColor = RGB(255, 255, 255); 
   MosaicInfo.uFlags = MSCT_CART | MSCT_SHADOWGRAY; 
   MosaicInfo.uTileHeight = m_LBitmapWnd.GetHeight()/5; 
   MosaicInfo.uTileWidth = m_LBitmapWnd.GetWidth()/5; 
   MosaicInfo.uOpacity = 50; 
   MosaicInfo.uShadowThreshold= 0; 
   MosaicInfo.uPenWidth = 7; 
   nRet =LeadBitmap.MosaicTiles(&MosaicInfo); 
   if(nRet !=SUCCESS) 
      return nRet; 
   return SUCCESS; 
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