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9 years, 7 months ago.
Image processing in mbed using LPC1768
I am new in mbed. i want to capture a image using a camera then i need to process the captured image. The image will contain a laser line. I need to scan the whole image and then i need to tell that the image has a straight line of laser. Normally when i work with image in Android, the image is first converted as bitmap (considered the image as a matrix) then i scanned row and column to each pixel . What about in mbed??
2 Answers
9 years, 7 months ago.
Hello,
there were similar questions asked on mbed, like this one : https://mbed.org/questions/2576/Can-LPC-1768-be-used-for-image-processin/. Use search functionality, to find them and they might provide an answer to your question.
Regards,
0xc0170
9 years, 7 months ago.
Hi,
Yes you can do some basic image processing on mbed - I did it for ERIC here. The problem you will have is memory. I used 160*120 pixel images which worked OK in RAM but any bigger and you will need to use external memory will be much slower. I was looking for circles in an image but I did play around with a Hough transform that would return lines.
Regards
Martin
I cant understand some matters. My image size is 160*120 pixels. When i transfer the image into microcontroller it transfers like ff d8 ff e0 00 10 ...........40 c6 81 90 b9 aa ee 68 19 ff . What does it mean?? how i determine a pixel with these?? how can i check a pixels value whether it match with red color or not??
posted by 01 Sep 2014Well it depends on what colour depth you have. The camera I used captured pictures in 16-bit RGB565. This means that each pixel is spread over 2 bytes withe the 5 MSBs being the red saturation, the next 6 bring green (the human eye is more sensitive to green) and the 5 LSBs being the blue saturation. I used bitwise operators to strip each colour from the 2 bytes. So for example if the 2 bytes were 0xF8 0x00 then the pixel would be pure red, 0x00 0x00 would be black and 0xFF 0xFF would be white. Does that help?
posted by 02 Sep 2014