红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2013年
2期
537-542
,共6页
图像处理%向导滤波%VLSI%FPGA
圖像處理%嚮導濾波%VLSI%FPGA
도상처리%향도려파%VLSI%FPGA
image processing%guided filtering%VLSI%FPGA
向导滤波器是近几年出现的一种边缘保持的滤波算法,在图像平滑、细节增强、去雾等方面已有广泛应用.提出了一种单图像向导滤波器的VLSI 结构,整个设计采用全流水线结构,不需要任何片外存储器,且实现了图像尺寸、滤波窗口大小等参数的灵活在线调整.实验结果表明,该结构的逻辑资源和内存需求较低,低端FPGA即可满足要求,在Altera的Cyclone III系列FPGA上每秒可处理100帧1024伊1024的图像,完全满足实时处理的要求.因此,所提出的结构既可为PC机提供硬件加速,也可用于嵌入式系统的前端,实现各种实时图像处理功能.
嚮導濾波器是近幾年齣現的一種邊緣保持的濾波算法,在圖像平滑、細節增彊、去霧等方麵已有廣汎應用.提齣瞭一種單圖像嚮導濾波器的VLSI 結構,整箇設計採用全流水線結構,不需要任何片外存儲器,且實現瞭圖像呎吋、濾波窗口大小等參數的靈活在線調整.實驗結果錶明,該結構的邏輯資源和內存需求較低,低耑FPGA即可滿足要求,在Altera的Cyclone III繫列FPGA上每秒可處理100幀1024伊1024的圖像,完全滿足實時處理的要求.因此,所提齣的結構既可為PC機提供硬件加速,也可用于嵌入式繫統的前耑,實現各種實時圖像處理功能.
향도려파기시근궤년출현적일충변연보지적려파산법,재도상평활、세절증강、거무등방면이유엄범응용.제출료일충단도상향도려파기적VLSI 결구,정개설계채용전류수선결구,불수요임하편외존저기,차실현료도상척촌、려파창구대소등삼수적령활재선조정.실험결과표명,해결구적라집자원화내존수구교저,저단FPGA즉가만족요구,재Altera적Cyclone III계렬FPGA상매초가처리100정1024이1024적도상,완전만족실시처리적요구.인차,소제출적결구기가위PC궤제공경건가속,야가용우감입식계통적전단,실현각충실시도상처리공능.
The guided filter is an edge preserving filter proposed in recent years, which can be broadly used in many image processing applications such as smoothing, detail enhancing, dehazing, etc. A high performance VLSI (Very Large Scale Integration) architecture of guided filter for single image was proposed. The architecture of the guided filter was fully pipelined, which can process images at the speed of nearly one pixel/cycle, without any off-chip memory. Moreover, a method which enable the size of the filtering window to be flexibly changed at run time was achieved. The architecture was implemented on FPGA of Altera's Cyclone III and synthesis result shows that the requirement of logic elements and memory is acceptable for low-end FPGAs. Additional experimental results show that the proposed architecture is capable of processing video with dimension of 1 024 by 1 024 at the frame rate of 100 FPS. The architecture can be used as accelerator card for PC or front end of embedded systems for different kinds of real-time image processing tasks.
