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Portable Colour Detector

Sridhar Mamella
Sridhar Mamella

This document describes a portable color detector application created by Sridhar Mamella. The application uses digital image processing techniques like gray balancing, neutral balancing, and white balancing to calibrate images from a device camera. It then applies k-means clustering to detect and identify colors in the images and display color names. The application was created using the Android SDK and interfaces with the device camera to function on a mobile platform.

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*The Android robot is reproduced and modi鍖ed from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License. * Portable Colour Detector Sridhar Mamella BEng (Hons) Computers and Electronics | Academic Year - 2013 | 2014 Introduction A method for detecting colours using a portable device with calibration techniques such as Auto White Balance (AWB) was devised. Results Digital Image Processing ≒ Gray Balance ≒ Neutral Balance ≒ White Balance ≒ K-means algorithm Android SDK ≒ Eclipse + ADT plugin ≒ Android SDK Tools ≒ Android system image emulator App ≒ Interfaced Camera ≒ RGB Values + more ≒ Displays colour names ≒ Combine versions Initialising representatives (means) Final App Layout Initialise means: ≒ By picking k samples at random Iterate: ≒ Assign each point to nearest mean ≒ Move mean to center of its cluster. Conclusion ≒ A method for detecting colours using a portable device with calibration techniques was achieved. ≒ Camera interfacing and digital signal processing techniques were applied. ≒ Furthermore, k-means clustering was computed and incorporated into a mobile device. Features ≒ Colour detection ≒ Image calibration ≒ Identi鍖cation of RGB values ≒ Colour storage Android's Camera HAL overview Android's camera Hardware Abstraction Layer (HAL) connects the higher level camera framework APIs in android hardware to a underlying camera driver and hardware. The following 鍖gure describes the components involved. Future Work ≒ Test more algorithms on a mobile device. ≒ Update colour library. Architecture Summary

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Portable Colour Detector

  • 1. *The Android robot is reproduced and modi鍖ed from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License. * Portable Colour Detector Sridhar Mamella BEng (Hons) Computers and Electronics | Academic Year - 2013 | 2014 Introduction A method for detecting colours using a portable device with calibration techniques such as Auto White Balance (AWB) was devised. Results Digital Image Processing ≒ Gray Balance ≒ Neutral Balance ≒ White Balance ≒ K-means algorithm Android SDK ≒ Eclipse + ADT plugin ≒ Android SDK Tools ≒ Android system image emulator App ≒ Interfaced Camera ≒ RGB Values + more ≒ Displays colour names ≒ Combine versions Initialising representatives (means) Final App Layout Initialise means: ≒ By picking k samples at random Iterate: ≒ Assign each point to nearest mean ≒ Move mean to center of its cluster. Conclusion ≒ A method for detecting colours using a portable device with calibration techniques was achieved. ≒ Camera interfacing and digital signal processing techniques were applied. ≒ Furthermore, k-means clustering was computed and incorporated into a mobile device. Features ≒ Colour detection ≒ Image calibration ≒ Identi鍖cation of RGB values ≒ Colour storage Android's Camera HAL overview Android's camera Hardware Abstraction Layer (HAL) connects the higher level camera framework APIs in android hardware to a underlying camera driver and hardware. The following 鍖gure describes the components involved. Future Work ≒ Test more algorithms on a mobile device. ≒ Update colour library. Architecture Summary