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    • 7. 发明授权
    • Binary reduction with structure preservation and density control
    • 二元还原结构保存和密度控制
    • US08331732B2
    • 2012-12-11
    • US12835239
    • 2010-07-13
    • Ryan MetcalfeClara Cuciurean-Zapan
    • Ryan MetcalfeClara Cuciurean-Zapan
    • G06K9/32
    • G06K9/38G06K2209/01
    • A method for performing binary image reduction on binary image data includes receiving binary input image data; determining a conversion factor to scale (i) an input resolution to an output resolution and/or (ii) an input size to an output size; applying the conversion factor to the input image data to obtain intermediate data, where each intermediate data corresponds to at least one input pixel and at least a portion of another input pixel; obtaining a binary output image data comprising a plurality of output pixels by thresholding the corresponding intermediate data; determining an error value for each output pixel, the error value is a non-integer value obtained as a result of thresholding the intermediate data corresponding to the output pixel; and propagating the obtained error value to an adjacent output pixel in a scanline, where the output image data is scaled to the output resolution and/or the output size.
    • 一种用于对二进制图像数据执行二进制图像降低的方法包括接收二进制输入图像数据; 确定转换因子以将(i)对输出分辨率的输入分辨率和/或(ii)到输出大小的输入大小; 将转换因子应用于输入图像数据以获得中间数据,其中每个中间数据对应于至少一个输入像素和另一个输入像素的至少一部分; 通过对相应的中间数据进行阈值来获得包括多个输出像素的二进制输出图像数据; 确定每个输出像素的误差值,所述误差值是作为对与所述输出像素相对应的中间数据进行阈值处理而获得的非整数值; 并将获得的误差值传播到扫描线中的相邻输出像素,其中输出图像数据被缩放到输出分辨率和/或输出大小。