基于FPGA的图像叠加及VGA显示设计
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摘要
为了实现两幅图像的半透明叠加的VGA显示,根据图像叠加原理和VGA显示原理,使用Altera公司的FPGA芯片CycloneⅣEP4CE15F17C8作为控制核心,采用Verilog HDL语言实现图像叠加Alpha算法,采用移位操作解决FPGA处理浮点运算问题,通过外部按钮来控制图像的透明度.用FPGA控制实现图像叠加的VGA实时显示,该设计方案具有体积小、成本低、速度快、工作稳定等优点.Modelsim仿真结果和实际显示效果验证了设计的正确性与可行性.
In order to achieve the semi-transparent overlay of two images and VGA realtime display,according to the principle of image overlay and the principle of VGA display,Altera's chip Cyclone ⅣEP4CE15F17C8 is used as the control core.The image overlay Alpha algorithm is achieved by Verilog HDL language. And the shift operation is adopted to solve the problem of FPGA processing floating point. And the transparency of the image is controlled by external buttons. The image overlay VGA display is realized by FPGA control,which has advantages such as smaller size,low cost,fast speed and more reliable stability. The Modelsim simulation results and the actual display results verify the correctness and feasibility of the design.
In order to achieve the semi-transparent overlay of two images and VGA realtime display,according to the principle of image overlay and the principle of VGA display,Altera's chip Cyclone ⅣEP4CE15F17C8 is used as the control core.The image overlay Alpha algorithm is achieved by Verilog HDL language. And the shift operation is adopted to solve the problem of FPGA processing floating point. And the transparency of the image is controlled by external buttons. The image overlay VGA display is realized by FPGA control,which has advantages such as smaller size,low cost,fast speed and more reliable stability. The Modelsim simulation results and the actual display results verify the correctness and feasibility of the design.
引文
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[6]高军.视频图像叠加的FPGA设计与实现[D].长沙:湖南大学,2008.
[7]胡妍,李逸仙,张婕,等.基于FPGA的图像处理及叠加系统的设计与实现[J].弹箭与制导学报,2016,36(6):154-156.
[8]CRAZY B.RGBA alpha透明度混合算法[DB/OL].http://www.cnblogs.com/crazybingo/archive/2012/05/11/2496440.html(2012-05-11).
[9]杜宗展,王振河,冯迎春.基于FPGA的VGA图像显示系统的设计[J].现代电子技术,2015,38(16):95-99.
[10]陈启武,白天蕊.基于FPGA的VGA显示系统的设计与实现[J].电子产品世界,2016,23(2/3):48-50.
[11]曹山,刘继勇.基于FPGA的Alpha半透明图像叠加算法硬件实现[J].电子设计工程,2015,23(10):172-174.
[2]ZHANG S,ZHANG H,CHEN B,et al.On-screen-display(OSD)and SPI interface on CMOS image sensor for automobile application[C]//Fifth international conference on computational intelligence,communication systems and networks,IEEE computer society,2013:405-408.
[3]ZHANG X,CHEN G,LIAO H.A high-accuracy surgical augmented reality system using enhanced integral videography image overlay[C]//Engineering in medicine&biology society.conf proc IEEE eng med biolsoc,2015:4210.
[4]李华英,向怀坤,曹泉,等.基于DSP/CPLD的视频叠加系统设计与实现[J].交通信息与安全,2005,23(6):79-82.
[5]王旭东,王新赛,李坚.基于FPGA的视频图像叠加系统的设计与实现[J].电子技术应用,2007,33(11):38-40.
[6]高军.视频图像叠加的FPGA设计与实现[D].长沙:湖南大学,2008.
[7]胡妍,李逸仙,张婕,等.基于FPGA的图像处理及叠加系统的设计与实现[J].弹箭与制导学报,2016,36(6):154-156.
[8]CRAZY B.RGBA alpha透明度混合算法[DB/OL].http://www.cnblogs.com/crazybingo/archive/2012/05/11/2496440.html(2012-05-11).
[9]杜宗展,王振河,冯迎春.基于FPGA的VGA图像显示系统的设计[J].现代电子技术,2015,38(16):95-99.
[10]陈启武,白天蕊.基于FPGA的VGA显示系统的设计与实现[J].电子产品世界,2016,23(2/3):48-50.
[11]曹山,刘继勇.基于FPGA的Alpha半透明图像叠加算法硬件实现[J].电子设计工程,2015,23(10):172-174.