| 摘要 |
In an apparatus, such as an optical mouse, relative motion between itself and an adjacent surface is detected. A lens focuses an image of the illuminated adjacent surface, and an image sensor receives the image and generates picture signals representing sequential frames of the image. A high-pass filter may filter the picture signals. An image processor may receive the high-pass filtered picture signals for correlating successive frames of the picture signals to derive an output representing the relative motion.
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