Research on Resistance Measurement Based on Digital Image Processing

In the field of color ring resistance measurement, scholars would prefer to do research on detecting color ring resistance value exactly or finding a new method to detect. In a circuit, users would rather get the value of color ring resistance from its surface color rather than know the accurate resistance value. When using the artificial method to read the color ring resistance from its surface, it will increase workload or cause misreading. In existing products which measure actual resistance value are to use basically electronic equipment instead of reading electric resistance value automatically. In order to decrease workload and achieve reading value automatically, this paper introduces a method to measure the value of the color ring resistance from the resistance surface by using the system which consists of STM32 and camera of OV7725. This system mainly uses camera and digital image processing to explore color ring identification.