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Clear image reflections for character recognition

PostPosted: Wed Jul 17, 2019 10:44 am
by mekazon
I am developing an optical character recognition system with image processing. Unfortunately, there is glass protection in front of the image. Therefore, I encounter reflections and light problems, is there any way I can avoid light and reflection problems.

The filters I use respectively;
* conservativesmoothing
* Grayscale
* Bradley
* Inverter
* The Blob
* Closing
* Dilatation
* verticalrunlengthsmoothing
* horizontalrunlengthsmoothing
* Sobel

Image
Image

Re: Clear image reflections for character recognition

PostPosted: Wed Jul 17, 2019 2:16 pm
by andrew.kirillov
mekazon wrote:is there any way I can avoid light and reflection problems.

Most of the time it is solved with proper light sources - i.e. special lighting is used to avoid reflection issues. Trying to solve it with image processing is not trivial, if not achievable. You may always get a different case where your algorithm fails.

Re: Clear image reflections for character recognition

PostPosted: Wed Jul 17, 2019 6:38 pm
by mekazon
andrew.kirillov wrote:
mekazon wrote:is there any way I can avoid light and reflection problems.

Most of the time it is solved with proper light sources - i.e. special lighting is used to avoid reflection issues. Trying to solve it with image processing is not trivial, if not achievable. You may always get a different case where your algorithm fails.


Thank you for your answer. You're right, I need proper lighting.