基于FPGA的电子变焦系统设计  

Electronic zoom system design based on the FPGA

作　　者：梁青[1] 李广卿[1] 陈文艺[2] 田科 

机构地区：[1]西安邮电大学电子工程学院,陕西西安710061 [2]西安邮电大学物联网与两化融合研究院,陕西西安710061 [3]京信通信系统(中国)有限公司无线接入产品事业部,广东广州510530

出　　处：《电子技术应用》2015年第4期69-72,76,共5页Application of Electronic Technique

基　　金：国家自然科学基金资助项目(61202490);陕西省教育厅科学研究计划基金资助项目(12JK0559)

摘　　要：针对数码相机、手机等移动设备的特点,提出一种基于高分辨率传感器的无损电子变焦模型,该模型同时克服了光学变焦模型和传统电子变焦模型的缺陷,输出图像可以达到光学变焦的效果。针对图像在缩放过程中的混叠现象,提出一种基于FPGA的抗混叠滤波和双线性插值相结合的图像缩放算法。通过MATLAB仿真表明,该算法得到的图像质量较高,硬件实现简单。First of all, according to the characteristics of digital cameras, mobile phones and other mobile devices, a nondestructive electronic zoom model based on high resolution sensors is proposed. The model overcomes the defects of optical zoom model and the traditional digital zoom model at the same time and the output image can achieve the effect of the optical zoom .Secondly a kind of image scaling algorithm based on FPGA combining anti-aliasing filter and bilinear interpolation is put forward to solve the aliasing phenomenon in the process of scaling the image. By Matlab simulation, the image quality of this algorithm is superior and the hardware implementation is simple.

关 键 词：图像 变焦 混叠 FPGA 

分 类 号：TN492[电子电信—微电子学与固体电子学]