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Vision System Enables Overlaid Images

Superhero Sight In this project article, learn how these two Cornell students designed a system to overlay images from a visible light camera and an infrared camera. They use software running on a PIC32 MCU to interface the two types of cameras. The MCU does the computation to create the overlaid images, and displays them on an LCD screen. How do you get superhero vision? Those who want to extend their vision into the infrared spectrum can spend a lifetime trying to tame nature. Alternatively, they can use a visible and infrared camera system to overlay visible and infrared light data, thereby enhancing their awareness of the world. To make this possible, we designed a software program that uses the Microchip PIC32 microcontroller (MCU) to interface a visible light color camera and an infrared light camera. This system displays three images on a TFT LCD: the infrared image, the color image and an overlay of infrared and color images. The overlaid image saturates color for hot objects, and gray-scales color for cold objects. This project was performed in two stages. The first stage—performed by both of us—interfaces an infrared camera and displays an image on an LCD screen [1]. The second stage, conducted by one of us (DE), overlays a color image on the infrared image. This article focuses on the second stage of the project. HARDWARE IMPLEMENTATIONIntegrating the two cameras and the LCD requires the use of every pin on the PIC32. The 60 × 80 pixel FLIR System
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