Nishar Federer Posted May 4, 2017 Report Share Posted May 4, 2017 Hi, I would like to read the characters whichever displayed on the LCD. This LCD is (16X2) of PIC Micro controller. These characters are alpha numeric characters Can anyone help me out in providing the which camera will suite my purpose? What is the approach should i do inorder to achieve this? Quote Link to comment
Tim_S Posted May 4, 2017 Report Share Posted May 4, 2017 (edited) That's a huge question. The camera has to be able to resolve what you're looking which is a matter of what feature you are looking for, camera pixel size, lens selection, distance from the target and size of the target region. All of that is math, so it's not too bad to calculate. Then there is lighting, which usually requires some level of voodoo in looking at target surface condition, ambient lighting and object in the area to determining position, light shape, light size, light color, camera filters.. Your best bet is to pick a supplier that will loan you various lighting arrangements and just try them out. Even with getting everything working, there are things that can happen to mess up the system like the glare from the mirror on a passing forklift or the light coming from a bay door 30m away on a sunny day at noon. Edited May 4, 2017 by Tim_S Quote Link to comment
infinitenothing Posted May 4, 2017 Report Share Posted May 4, 2017 (edited) Sounds pretty easy. Get a smart cam and a ring light. I should moonlight as an NI sales rep. Edited May 4, 2017 by infinitenothing Quote Link to comment
ensegre Posted May 5, 2017 Report Share Posted May 5, 2017 Will the smart cam run OCR onboard? If that is not required, a properly placed webcam and a couple of leds might just do, for much less. As Tim_S wrote, the art is setting things up for getting always a clean image. The OP doesn't say if his next question would be then how to use IMAQ, image preprocessing, OCR and all what involved. Quote Link to comment
hatef Posted January 20, 2018 Report Share Posted January 20, 2018 these kind of led are easy cake refresh rate is not so fast (max 20 fps) and backlight is ready so you can use even a webcam for this one just dont forget to use extractcolor.vi with appropriate color based on lcd color and also regarding lcd liquid crystal saturation problem use well trained .abs file Quote Link to comment
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