A Low-Cost Megapixel Digital Camera Using High-Performance in-Camera Image Processing
نویسندگان
چکیده
Digital cameras are becoming more powerful and affordable with each product generation. This paper describes a new generation digital camera that optimizes image quality and ease of use. Excellent image quality is obtained by employing a megapixel CCD sensor and advanced image processing algorithms. A 1.8” color LCD and a new graphical user interface (GUI) guide the user through the operation of the camera. The camera has a 2X zoom lens, real image optical viewfinder, and a “camera like” industrial design. A host of “traditional” camera features are supported, including selftimer, five flash modes, macro mode, and exposure compensation. These features are augmented by digital camera features including preview (live viewfinder), instant image review, in-camera finished files (Exif/JPEG and FlashPix image formats) and video output. Significant digital signal processing power is required to implement the image processing algorithms and the GUI. A 60 MHz RISC processor with an on-board 16-bit DSP coprocessor provides all of the camera image and display processing functions. The image processing functions include color filter array interpolation, white balance, color and tone correction, edge enhancement, thumbnail image generation, JPEG image compression, and file formatting.
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