Why the SetVariable don't work normally?

[朱裕清]

This is my image

And this is my code

#include <tesseract/baseapi.h>
#include <leptonica/allheaders.h>


int main()
{
 tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
 api->Init(".\\tessdata", "eng");
 Pix *image = pixRead("image.png");
 api->SetImage(image);
        api->SetPageSegMode(tesseract::PSM_SINGLE_CHAR);

 api->SetSourceResolution(300);
 api->SetVariable("classify_bln_numeric_mode", "1");
 //api->SetVariable("tessedit_char_whitelist", "0123456789");
 api->SetRectangle(61, 4, 38, 22);
 char *outText = api->GetUTF8Text();
 cout << outText << endl;
 api->End();


 return 0;
}

I will get a character A. Why my SetVariable("classify_bln_numeric_mode", "1"); don't work normally? And even I use SetVariable("tessedit_char_whitelist", "0123456789");. The result is same still. How to read a digit from a specify rectangle?

[朱裕清]

Hi, I'm glad to receive your response. I have to say this problem stumped me some days.. And I'm in newest tesseract 3.05.01 in here.

在 2018年1月31日星期三 UTC+8下午4:44:12，James Q写道：

If you are using tesseract 4 then whitelists/blacklists do not yet work (at least not in LSTM mode). I also get the impression that the 'Control Parameters' list you obtain by typing 'tesseract --print-parameters'on the command line is not updated to the supported functionality in tesseract 4. My advice would by to test a particular variable on command line tesseract to determine if it is supported before trying to set it via an API.

The whitelists/blacklists are supposed to be supported in Tesseract 4 in Tesseract mode I believe, but I haven't managed to get these working at all.

Please let me know how you get on.

Thanks

James
 

yping 

[朱裕清]

But if I use the command line method in my windows 10. I can get these result

在 2018年1月31日星期三 UTC+8下午4:44:12，James Q写道：

If you are using tesseract 4 then whitelists/blacklists do not yet work (at least not in LSTM mode). I also get the impression that the 'Control Parameters' list you obtain by typing 'tesseract --print-parameters'on the command line is not updated to the supported functionality in tesseract 4. My advice would by to test a particular variable on command line tesseract to determine if it is supported before trying to set it via an API.

The whitelists/blacklists are supposed to be supported in Tesseract 4 in Tesseract mode I believe, but I haven't managed to get these working at all.

Please let me know how you get on.

Thanks

James
 

yping 

On Friday, January 26, 2018 at 7:35:37 PM UTC, 朱裕清 wrote: