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    • 2. 发明申请
    • IMAGE READING APPARATUS
    • 图像阅读器
    • US20090180155A1
    • 2009-07-16
    • US12341963
    • 2008-12-22
    • Tetsuya KATONoriko MISUMIHiroaki FUJII
    • Tetsuya KATONoriko MISUMIHiroaki FUJII
    • H04N1/40
    • H04N1/3873H04N1/3877
    • An image reading apparatus includes a document table that is transparent, a read unit that reads a document placed on the document table through the document table so as to generate image data representing a read image of the document, an extraction unit that converts the image data of the read result of the read unit into edge image data representing an edge image and extracts edge points satisfying a predetermined condition as edge points corresponding to a side of the document placed on the document table from the edge image data, an outer margin recognition unit that approximates the edge points corresponding to each side of the document extracted by the extraction unit to a line so as to recognize an outer margin of the document, and a likelihood evaluation unit that evaluates the likelihood of the outer margin recognized by the outer margin recognition unit.
    • 图像读取装置包括透明的文件表,读取单元,其通过文档表读取放置在文档表上的文档,以生成表示文档的读取图像的图像数据;转换图像数据的提取单元 将读取单元的读取结果转换为表示边缘图像的边缘图像数据,并从边缘图像数据提取满足预定条件的边缘点作为与放置在文档表上的文档的一侧对应的边缘点,外部边缘识别单元 其将与提取单元提取的文档的每一侧对应的边缘点近似为一行,以便识别该文档的外部边缘;以及可能性评估单元,其评估通过外部边缘识别识别的外部边缘的可能性 单元。