How to do Image processing for 7 segment display

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Any one plz tell me how to do image processing for 7 segment display, using vb.net MODI method i can read normal image, want a solution for 7 segment display.

plz let me know any solutions.

Thanks.

sample of 7 segment display

Posted 22-Sep-14 22:17pm

Ashish Bachhav

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Tino Fourie · Answer 1 · 2014-09-24T08:30:00

Solution 1

MODI does OCR on images.

A 7 segment display does not create images, it is in fact an electronic component controlled by a number of AND, OR and NOR gates which will decide, depending on their ON / OFF state, which one of 7 segments will be lit or not.

Now, where exactly does the 7 segment display fit into your program ?

Posted 24-Sep-14 8:30am

Tino Fourie

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Ashish Bachhav 25-Sep-14 8:34am

i get the image from my webcam, then i get that image in picturebox and then i do image processing. in that image 7 segment display digits are there.
if i use simple text image, then it read correctly. but for 7 segment display it's not work.

thanks for reply.

Tino Fourie 25-Sep-14 8:49am

Well firstly, your approach to use MODI on an image of a 7 segment display will never work since the 7 segment display will never produce a character than can be identified during OCR.

Secondly, MODI is a discontinued product from Microsoft with its last release with MS Office 2010.

You will need to look into Emgu, an OpenCV wrapper. More information at this http://www.emgu.com/wiki/index.php/Tutorial :

If you do it right, you should be able to read what is displayed on the 7-segment display during live video feed. No need to capture a frame of the video feed and then create an image from that.
Just make sure that your frame rate is fast enough to produce "full motion" video feed - minimum of around 12 - 14 frames per second should do.

How to do Image processing for 7 segment display

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How to do Image processing for 7 segment display

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