Image detecting device and method

摘要

An image detecting device receives a video signal stream including at least one frame. Each frame includes rows of data, and each row of data has a plurality of pixels. The frame has an image portion and a blank portion. The image detecting device includes a characterizing unit and a searcher. The characterizing unit receives the pixels and determines pixel characterization values thereof. The searcher includes an image comparator and a blank comparator. The image comparator and the blank comparator evaluate the pixel characterization value of a current pixel to determine whether the current pixel belongs to the image portion or the blank portion. The searcher derives a position of the image portion based on determined results of the image comparator and the blank comparator. An image detecting method is also disclosed.