mirror/tesseract
1
0
Fork 0
mirror of https://github.com/tesseract-ocr/tesseract.git synced 2025-01-22 09:53:03 +08:00
Code Issues Actions 11 Packages Projects Releases Wiki Activity

Fix conversion of images with 16 bpp or 24 bpp to grey

Browse Source 
The old code used pixConvertRGBToLuminance which only converts 32 bpp images.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
This commit is contained in:
Stefan Weil 2020-06-20 21:41:01 +02:00
parent 6f6100ff9f
commit 4a10bb68c7
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/ccmain/thresholder.cpp
View File

@ -251,11 +251,15 @@ Pix* ImageThresholder::GetPixRect() {
// The returned Pix must be pixDestroyed. // The returned Pix must be pixDestroyed.
// Provided to the classifier to extract features from the greyscale image. // Provided to the classifier to extract features from the greyscale image.
Pix* ImageThresholder::GetPixRectGrey() { Pix* ImageThresholder::GetPixRectGrey() {
Pix* pix = GetPixRect(); // May have to be reduced to grey. auto pix = GetPixRect(); // May have to be reduced to grey.
int depth = pixGetDepth(pix); int depth = pixGetDepth(pix);
if (depth != 8) { if (depth != 8) {
Pix* result = depth < 8 ? pixConvertTo8(pix, false) if (depth == 24) {
: pixConvertRGBToLuminance(pix); auto tmp = pixConvert24To32(pix);
pixDestroy(&pix);
pix = tmp;
}
auto result = pixConvertTo8(pix, false);
pixDestroy(&pix); pixDestroy(&pix);
return result; return result;
} }