OCR Character Confidence
OCR Character Confidence
I am doing OCR on an image and checking for Character Confidence.
for the Word FULL NAME when i use OCRTesseractGetCharConfidence
i get
F=19
U=19
L=19
L=19
N=65
A=65
M=65
E=65
When i debug in .Net i see the following values in the GDImaging Object
F=49
U=49
L=49
L=49
N=166
A=166
M=166
E=166
Can you tell me how these 2 values are related also which is more accurate the lower or higher value.
Also i have noticed that Confidence levels of a single word are always same as you can see above this is the case with other words as well. Is the confidence at Character or Word level.
Regards
Ganesh
for the Word FULL NAME when i use OCRTesseractGetCharConfidence
i get
F=19
U=19
L=19
L=19
N=65
A=65
M=65
E=65
When i debug in .Net i see the following values in the GDImaging Object
F=49
U=49
L=49
L=49
N=166
A=166
M=166
E=166
Can you tell me how these 2 values are related also which is more accurate the lower or higher value.
Also i have noticed that Confidence levels of a single word are always same as you can see above this is the case with other words as well. Is the confidence at Character or Word level.
Regards
Ganesh
Re: OCR Character Confidence
Hi Loic,
Any update on the above question. Thanks.
Any update on the above question. Thanks.
Re: OCR Character Confidence
Still waiting for a reply on this.
Re: OCR Character Confidence
Hi,
If you are able to reproduce this behavior in a comprehensive small application you can send it to esupport (at) gdpicture (dot) com for more investigations.
Kind regards,
Loïc
You probably done something different to make test such as image filter or using different dictionary.Can you tell me how these 2 values are related also which is more accurate the lower or higher value.
If you are able to reproduce this behavior in a comprehensive small application you can send it to esupport (at) gdpicture (dot) com for more investigations.
word.Is the confidence at Character or Word level.
Kind regards,
Loïc
Re: OCR Character Confidence
I'm just guessing, but I believe what you are seeing is a difference in the range.
19 is 19% (range 0-100), but 49 is in the range of (0-255). 19 / 100 * 256 = 48.86.
65 / 100 * 256 = 166.4
19 is 19% (range 0-100), but 49 is in the range of (0-255). 19 / 100 * 256 = 48.86.
65 / 100 * 256 = 166.4
Re: OCR Character Confidence
Hello,
You can try this using the GdPictureOCR class now:
https://www.gdpicture.com/guides/gdpicture/we ... reOCR.html
You can try this using the GdPictureOCR class now:
https://www.gdpicture.com/guides/gdpicture/we ... reOCR.html
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