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Merge pull request #1037 from anshul1912/master

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[IMPROVEMENT]Remove multiple RGB to grey conversion while OCR
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Anshul Maheshwari 2018-11-05 16:31:02 +05:30 committed by GitHub
commit 5df1dbb922
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2 changed files with 7 additions and 5 deletions
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1
docs/CHANGES.TXT
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@ -1,5 +1,6 @@
0.88(2018-10-24) (unreleased)
-----------------
- Optimize: Remove multiple RGB to grey conversion in OCR.
- Fix: Update UTF8Proc to 2.2.0
- Fix: Warn instead of fatal when a 0xFF marker is missing

11
src/lib_ccx/ocr.c
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@ -192,7 +192,7 @@ BOX* ignore_alpha_at_edge(png_byte *alpha, unsigned char* indata, int w, int h,
char* ocr_bitmap(void* arg, png_color *palette,png_byte *alpha, unsigned char* indata,int w, int h, struct image_copy *copy)
{
// uncomment the below lines to output raw image as debug.png iteratively
//save_spupng("debug.png", indata, w, h, palette, alpha, 16);
// save_spupng("debug.png", indata, w, h, palette, alpha, 16);
PIX *pix = NULL;
PIX *cpix = NULL;
@ -244,20 +244,21 @@ char* ocr_bitmap(void* arg, png_color *palette,png_byte *alpha, unsigned char* i
ppixel++;
}
}
BOX *crop_points = ignore_alpha_at_edge(copy->alpha, copy->data, w, h, color_pix, &color_pix_out);
// Converting image to grayscale for OCR to avoid issues with transparency
cpix_gs = pixConvertRGBToGray(cpix, 0.0, 0.0, 0.0);
#ifdef OCR_DEBUG
{
char str[128] = "";
static int i = 0;
sprintf(str,"temp/file_c_%d.jpg",i);
printf("Writing file_c_%d.jpg\n", i);
pixWrite(str, pixConvertRGBToGray(cpix, 0.0, 0.0, 0.0), IFF_JFIF_JPEG);
pixWrite(str, cpix_gs, IFF_JFIF_JPEG);
i++;
}
#endif
cpix_gs = pixConvertRGBToGray(cpix, 0.0, 0.0, 0.0); // Abhinav95: Converting image to grayscale for OCR to avoid issues with transparency
if (cpix_gs==NULL)
tess_ret=-1;
else
@ -273,7 +274,7 @@ char* ocr_bitmap(void* arg, png_color *palette,png_byte *alpha, unsigned char* i
pixDestroy(&cpix_gs);
pixDestroy(&color_pix);
pixDestroy(&color_pix_out);
return NULL;
}
}