NI OCR Training

[Steph.G]

Hi

We have NI OCR solutions.
When we train letter with OCR Training Software, it generates a file .abc with the letter trained.
But were the parameters like (Character size, Treshold value) saved ?
It didn't seem, because, when we try to recognize characters using the file characters.abc, the ROI aren't the same as the training, and we must define the ROI to have correct OCR.

Thx

Steph.G

[Yusuf C]

Hello,

If the characters you work with are varying in size you need to train it for all different sizes, fonts, and etc. The more variances the OCR is trained for, the better results you'll get.
Hope this helps. Let me know if you have further questions regarding this.

Regards,

Yusuf C.
Applications Engineering
National Instruments

[YH_Goh]

Hi Steph,

when you the character file from labview,you need to specify that you are reading the character as well as parameter(select choose all).

The threshold value will always change because it is calculated based on the ROI that you have drawn. If you want the threshold to remain constant, you can try to ensure that the ROI for the image template and image ROI remain the same.

Ideally you can do a resampling, it has given me a better result too.

Regards,
YH GOH
National Instruments