Portraits with OpenCV and Neopixel
NeoPixels are cool and we all know that. Who doesn't want an RGB led with an embedded controller? I got excited and ordered a few, I mean little more than a few. Played with them built chasers, rainbows, etc. Then they sat in my closet till I got this idea.
Then on one day, I was taking pictures with the phone but the results were not coming as I expected. I was expecting the green canopy to cast shade on the subject similar to what my eyes are seeing. I tried post-processing but then the results were meh!
I knew I need help from Raspberry Pi, a swiss army knife for tinkerers. So I embarked on a journey to build a light that shows the most dominant color in the frame. That’s where OpenCV was useful.
Simple flow to do this was to:
- Read camera frame
- Crop the image to the center region
- Find dominant color in the region using OpenCV implementation of KMeans
- Pass the color to the NeoPixel
Will post the code and resulting images soon.