FPGA based aviation camera real-time electronic zooming system

Abstract

The invention provides an FPGA based aviation camera real-time electronic zooming system which has universality and can serve as an independent module to be added to an imaging link of an aviation camera. The FPGA based aviation camera real-time electronic zooming system comprises an image input module, an SRAM image storage module, an electronic zooming parameter setting module, a DRAM storage control module, a bilinear interpolation module and an image output module. Original images input by the aviation camera are sent to a memory in an FPGA chip through the image input module for temporarystorage, and then are stored in an SRAM through the SRAM image storage module for subsequent processing. The electronic zooming parameter setting module after receiving the electronic zooming instruction carries out corresponding parameter calculation and setting and inputs the parameters to the bilinear interpolation module; then the images are read out by the SRAM to the DRAM for bilinear interpolation processing, and finally the images are output by the image output module. So far, the electronic zooming processing of the aviation camera images is finished.

Description

Technical field [0001] The invention belongs to the technical field of remote sensing imaging, and relates to an FPGA-based real-time electronic zoom system of an aerial camera. Background technique [0002] In the field of aerial remote sensing imaging, the photoelectric payload is the source of the image, and its imaging performance indicators directly affect the accuracy of subsequent image processing. With the increase of aircraft flying height and the expansion of combat radius, higher and higher requirements have been placed on the optical performance of photoelectric payloads. However, limited by the size and performance of the optical system, the focal length of the photoelectric load cannot be infinitely long. When the camera is at the longest focal length, if the observer is interested in the details of a certain position, the image needs to be enlarged. Image magnification is an important technology in the field of modern digital image processing, and it is widely use...

AI Technical Summary

Problems solved by technology

Image magnification is generally implemented by software on the host computer. This implementation method belongs to post-position image processing, which cannot guarantee the real-time performance of imaging. When the photoelectric load is used for target tracking, the tracking performance of the target cannot be guaranteed.

Images