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Color Sensors and Calibration

The light sensor works by shining a white

light at an object and then recording the reflected colour. Through red, green

and blue colour filters (the photodiodes), it converts the amount of light to

current. The converter then converts the current to voltage which our

Avishkaar brain can read.


These sensors have many applications in industrial and art applications. Based on our experiments

what we have discovered is the sensors can be used in detecting what color is present, but

getting absolute R,G,B values is difficult. The primary reason for this anomaly is the environment.

As environments ambient light depends on the time of the day, the location, hence reflected light

is pretty much dependant on this. So, what we need to work on is the relative R,G and B values. What we

have seen, white color is mixture of all the three colors reflected in lowest values while black is mixture 

of all colors reflected in highest values. Rest all colors are relative to these two extremes.


Based on our experiments and above theory, we have implemented our Color calibration feature.  

You can get our Beta version of the Robo G software from our website (https://www.avishkaar.cc/softwares/robo-g-30). 

Go ahead and use this feature as it allows you detect and calibrate per your environment. 


Keep Inventing!! 

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