Event Title

Analysis of the Accuracy of Color Filter Arrays by Color Sets and Arrangement in Digital Images

Session Number

F12

Advisor(s)

Phadmakar Patankar, Illinois Mathematics and Science Academy

Location

A-115

Start Date

28-4-2016 8:25 AM

End Date

28-4-2016 8:50 AM

Disciplines

Computer Sciences

Abstract

Photography has largely gone digital, and these images are developing to become more realistic reflections of their subjects. By analyzing the digitizing process of creating colored images from the color filter array layered image sensor, the most accurate method of extrapolating color can be examined. By coding arrays to mimic the information collected from an image sensor with a color filter array, and testing the accuracy of images by comparing percent change in pixel value, the accuracy of each array was tested. Results show that color filter arrays that sample red, green, and blue are more accurate in lower light settings with the average color value of the picture to be below 127.5 while color filter arrays that sample cyan, yellow, and magenta are more accurate above. Furthermore the arrangement pattern of the color filter array determines the accuracy of a photo, with the more accurate arrangement a rigid pattern that alternates colors. These make digital photos faithful to their real life subjects.


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Apr 28th, 8:25 AM Apr 28th, 8:50 AM

Analysis of the Accuracy of Color Filter Arrays by Color Sets and Arrangement in Digital Images

A-115

Photography has largely gone digital, and these images are developing to become more realistic reflections of their subjects. By analyzing the digitizing process of creating colored images from the color filter array layered image sensor, the most accurate method of extrapolating color can be examined. By coding arrays to mimic the information collected from an image sensor with a color filter array, and testing the accuracy of images by comparing percent change in pixel value, the accuracy of each array was tested. Results show that color filter arrays that sample red, green, and blue are more accurate in lower light settings with the average color value of the picture to be below 127.5 while color filter arrays that sample cyan, yellow, and magenta are more accurate above. Furthermore the arrangement pattern of the color filter array determines the accuracy of a photo, with the more accurate arrangement a rigid pattern that alternates colors. These make digital photos faithful to their real life subjects.