The figure shown on the project board is my first attempt to demonstrate the multispectral computer vision plant biofeedhack system concept. The picture was taken with a modified LED grow light and Raspberry Pi noir camera. The picture shows different images of a five week old basil plant leaf illuminated by different LED wavelengths. Top left is a computer vision enhanced image. Top right is white light image. Images below are recorded with ultraviolet (uv1,uv2), blue(blu), green (grn), red and infrared (ir) LED light. Remaining pictures are processed composite images that highlight color contrast. Computer vision software (SimpleCV) extracts the leaf image (colored dark green) and measures number of pixels in the area, length, width and perimeter (bottom text). The picture shows that a measurement system can be built to characterize plant growth and multispectral leaf reflectance. The measurements can then be used to tailor the LED light for different growth conditions.
I am reaching out to the hackaday community for support to build a more advanced prototype (see schematic) and develop improved plant light growth algorithms. I learned a lot building the first prototype for my high school science fair and would like to improve the design by using different LEDs and adding environmental feedback sensors.