L_TextBlurDetector

#include "l_bitmap.h"

L_LTIMGCOR_API L_INT L_TextBlurDetector(pBitmap, pNonBlurredBlocks, NonBlurredBlocksCount, pBlurredBlocks, BlurredBlocksCount, CombinedTextBlocks)

Divides an image it into many blocks, and determines whether each block's background in focus or out of focus.

Parameters

pBITMAPHANDLE pBitmap

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

L_RECT** pNonBlurredBlocks

Pointer to array of in focus blocks after applying text blur detector.

L_INT* NonBlurredBlocksCount

Pointer to L_INT to be updated with the number of in focus blocks after applying text blur detector.

L_RECT** pBlurredBlocks

Pointer to array of out of focus blocks after applying text blur detector.

L_INT* BlurredBlocksCount

Pointer to L_INT to be updated with the number of out of focus blocks after applying text blur detector.

L_RECT* CombinedTextBlocks

The boundary of text area in the image, that's isn't a background.

Returns

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

Comments

This function supports 8, 12, 16-bit grayscale images and 24, 32-bit colored images.

Required DLLs and Libraries

Platforms

Win32, x64, Linux.

Example

This example loads a bitmap and applies text blur detector.

L_INT TextBlurDetectorExample(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("Barcode.jpg")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
    if(nRet !=SUCCESS) 
        return nRet; 
 
    /* Apply text blur detector */ 
    L_RECT* pInFocusBlocks      = NULL; 
    L_INT InFocusBlocksCount    = 0; 
    L_RECT* pOutOfFocusBlocks   = NULL; 
    L_INT OutOfFocusBlocksCount = 0; 
    L_RECT CombinedTextBlocks   = {0}; 
 
    nRet = L_TextBlurDetector(&LeadBitmap, &pInFocusBlocks, &InFocusBlocksCount, &pOutOfFocusBlocks, &OutOfFocusBlocksCount, &CombinedTextBlocks); 
 
    L_TextBlurFree(pInFocusBlocks, pOutOfFocusBlocks); 
 
    //free bitmap  
    if(LeadBitmap.Flags.Allocated) 
        L_FreeBitmap(&LeadBitmap); 
 
    return nRet; 
} 

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