Note that the Charles Weld Tesseract 3 wrapper works well with varying
these values, so I am trying to get the Tesseract 4 version of that working
which basically has the same API. For now though the Tesseract.net 4.0.0.6
one is the only 4.0 wrapper that works for me, hence this post.
On Thursday, January 11, 2018 at 7:15:58 PM UTC, James Q wrote:
>
> Is anyone else using tesseract 4.0alpha from C# ?
>
> On Wednesday, January 10, 2018 at 1:07:28 PM UTC, James Q wrote:
>>
>> Here is my code:
>> string text = "";
>>
>> string tessDataPath = ConfigurationManager.AppSettings["TessPath"];
>> using (var engine = new TessBaseAPI(@tessDataPath, @"eng"))
>> {
>> engine.SetVariable("tessedit_ocr_engine_mode", "0");
>> engine.SetPageSegMode(PageSegmentationMode.SINGLE_LINE);
>> engine.SetVariable("tessedit_char_blacklist", type.
>> GetTesseractOptions().Blacklist());
>> engine.SetVariable("tessedit_char_whitelist", type.
>> GetTesseractOptions().Whitelist());
>> engine.Process(imageFileName, false);
>> text = engine.GetUTF8Text();
>>
>> }
>>
>> I'm sending images which represent one or a few words on a single line,
>> but in the above code, the SetPageSegMode(..) method has no effect. On the
>> command line I can use:
>>
>> tesseract.exe input.png result -l eng --psm 7 --oem 1
>>
>> on the same images and see clearly better results on psm 7. Does anyone
>> know how to configure this option via the wrapper or is it just not
>> suppported?
>>
>> Also, blacklists and whitelists are having no effect in the wrapper.
>> Whilst I understand that these are not supported in Tesseract 4 LSTM mode
>> yet, they should still work in 'Tesseract Only' mode right? I know the
>> SetVariable method works (as I see its effect on engine mode). Is there
>> another way of setting blacklists and whitelists through this wrapper?
>>
>> Thanks
>> James
>>
>
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