Measurement of CD Deviations

Overview

Objectives/Goals The purpose of this project is to see if all manufactured CDs have the exact same area and perimeter. If not, which brands have more deviations in their manufactured production and which ones have less? My objective is to measure the deviations of each brand through image processing with images of 50 CDs of each brand of CD, and putting the image through my written program that will hten measure the area and perimeter of both the actual CD and the hole in the middle of the CD. Methods/Materials 50 Philips blank CDs, 50 Memorex blank CDs, 50 Imation blank CDs, 1 Matlab Program, 1 Adobe Photoshop Program, 1 Sony Cyber-shot Camera (5.0 Mega Pixels), 1 Camera stand, 1 CD lid Results The CD that cost the least (Imation) had the highest deviations in manufacturing. The CD brand that cost the most (Philips) had the least deviations in manufacturing. The Matlab program was successful in determining the area and perimeter of both the CD and its inner hole accurately. Conclusions/Discussion The higher the deviations in manufacturing per brand, the cheaper the brice for a CD of that brand. Image processing that is run through the Matlab program is an effective way to verify the accuracy of measurements of certain objects and to determine the amount of deviation that occurs between two compared objects.

Competition history

• CSEF 2006 Applied Mechanics/ Structures & Mechanisms/ Manufacturing · Entry S0207

Resources

• CSEF project summary ↗

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