The design of video image capture circuit
ABSTRACT:What the thesis is mainly introduced is the analysis and design of the card of image collection. The card is used to capture pictorial information at any time. It respectively introduces the pickup camera, the circuit of image collection, the store circuit, the interface circuit and the major parts of computer, and the collective circuit of VIDEO IMAGE is designed. It mainly consists of the Phillips’digital video decoder—SAA7111A、video memory FIFO、flip-latch PCF74HC574 and single chip microcomputer. The whole system is to collect integrated images whose resolving power is 720×567 an any time.
Its chief purpose is that the model signals, picked up by CCD pick up camera, are transformed by A/D from simulation to digital form, then written in frame memory FIFO, at last the pictorial information collected is transmitted to the software system of main engine in which advanced processing is made (Three dimensional rebuilding). Flip-latch earmarks the digital signals for storage, and the one-chip computer finishes initializing the chip SAA7111A through I2C bus.
KEYWORDS: VIDEO IMAGE;SAA7111A; MAGE SAMPLING;3DLCS;I2C;FIFO