Technology Research Of Image Capture And Touch Screen Processing Based On A8Processor

In recent years, intelligent electronic terminal devices are widely used in ourlife, which make our life rich and colorful, and gradually chang our life at the sametime. As a free and open source operating system, Android, with many goodfeatures of portability, customizability and strong user experience, is widely usedin a variety of intelligent terminal equipment, such as smart phone, digital photofame, PAD and MP3. Touch screen, as the input device of this equipment, has thefeatures of durability, saving space, quick response and operability, so it is paidmore and more attention by people at present. It can change the skin of theintelligent terminal devices, which is an attractive multimedia interactive device.The hardware platform of this thesis is based on the Samsung S5PV210, thefrequency of the used ARM CortexTM-A8kernel can reach1GHz. The softwareplatform adopted the open and free Android2.3. The thesis mainly realize thedevelopment of the camera controller and sensor driver, above all, accomplish thedesign and realization of five point calibration algorithom and the prevention ofmalicious operation for touch screen calibration in touch screen model.The research firstly analyze the performance and feature of the S5PV210platform、the OS structure of the Android based on the Linux kernel, and constructthe development environment for the reaearch, secondly, accomplish thedevelopment of the camera controller and the camera sensor driver after theanalysises of the hardware and system structure of camera. At last, its emphasis isto realize the interrupt reistered function and register interface configuration oftouch screen, introduce the principle and realization of the prevention of maliciousoperation for touch screen calibration during the sampling process and adoptedfive calibration algorithm to process the filtered sampling data, which guaranteethe accurace of the calibration cofficient.