FPGA Implementation Of Histogram Equalization Based Real Time Video Image Processing
2009
Hochschulschrift
Zugriff:
97
In this dissertation, a video image processing systems was implemented on an Altera ED2-70 FPGA development board. The video images were captured by a 5 million pixel CMOS digital camera. The first stage of the vision system is the image acquisition stage. The image is acquired and then stored in SDRAM. After the image has been obtained, various methods of processing can be applied to the image to perform the many different vision tasks such as histogram equalization for image enhancement. The image data after processing are output to the LCD touch screen through the LCD touch screen controller. The video system contains five modules, namely image acquisition module (CMOS Sensor Data Capture), image data format conversion and sampling module (Bayer Color Pattern Data To 30-Bit RGB), SDRAM controller module (Multi-Port SDRAM Controller), image processing module (Image process), and LCD touch screen controller (LTM Controller And Data Request). The image capture module is to convert a two-dimensional image to a one-dimension electrical signal that can be handled by the computer. The image data format conversion and the sampling function modules is used for transforming the image data into the the 10bit RGB format. The SDRAM controller module is used to control the function of image data in the access to SDRAM. Image processing module is used for image processing algorithms such as Histogram equalization and the smoothing filter (Average) algorithm. The LCD touch-screen controller function is used for image data output to the LCD touch-screen. The proposed algorithms are applied for the gray-scale images and color images processing. The proposed image enhanced method is simulated by Altera Quartus II. software tool. The verified codes are downloaded on FPGA for hardware verification. The results indicate our proposed video system can obtain a better image quality.
Titel: |
FPGA Implementation Of Histogram Equalization Based Real Time Video Image Processing
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Autor/in / Beteiligte Person: | Huang, Kai-hsiang ; 黃愷翔 |
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Veröffentlichung: | 2009 |
Medientyp: | Hochschulschrift |
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