Color sensor measurement problem

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SUMMARY

The discussion centers on measurement discrepancies encountered while using the TCS230 light to frequency converter, a CMOS color sensor. Users reported that the output frequency for expected RGB values (255,255,255 for white and 0,0,0 for black) did not match the anticipated results, indicating potential issues with the sensor's calibration or environmental factors. The overlap in spectral responsivity of the photodiodes, as noted in the sensor's datasheet, may contribute to these inaccuracies. Participants are seeking solutions to improve measurement consistency.

PREREQUISITES
  • Understanding of color theory and RGB color models
  • Familiarity with the TCS230 light to frequency converter specifications
  • Basic knowledge of photodiode functionality and spectral responsivity
  • Experience with sensor calibration techniques
NEXT STEPS
  • Review the TCS230 datasheet for detailed specifications and calibration methods
  • Investigate the effects of ambient light on sensor readings
  • Explore techniques for compensating color overlap in sensor outputs
  • Learn about alternative color sensors and their measurement accuracy
USEFUL FOR

Electronics engineers, hobbyists working with color sensors, and researchers focused on optical measurement systems will benefit from this discussion.

thavamaran
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Hi guys, I am currently undergoing some measurement with TCS230 light to frequency converter, its actually a cmos color sensor, so the measurement result was made in period measurement.

For white the output was not almost the same, but actually according to bitmap resolution, the R,G,B value for white is 255,255,255, but through this sensor, the output frequency is not really that similar, it actually varies. and for black its suppose to be R,G,B=0,0,0 and the output of the sensor is not really similar.

same when i place the sensor on Red which is R,G,B=255,0,0 and there is no green or blue intensity on this particular color, but still I am getting output reading. so i need suggestion that what would be the problem? i feel its related to physics.
here is the link for datasheet of the sensor I am using. thank you.
http://www.w-r-e.de/robotik/data/opt/tcs230.pdf"
 
Last edited by a moderator:
Engineering news on Phys.org
Look at the data sheets PHOTODIODE SPECTRAL RESPONSIVITY. Do you not see that the three color overlap?
 

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