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    • 4. 发明授权
    • Randomized superpixels to enhance multilevel image quality in economical, fast incremental-printing error diffusion
    • 随机超像素在经济,快速增量打印误差扩散中提高多级图像质量
    • US07031021B1
    • 2006-04-18
    • US09642416
    • 2000-08-19
    • Antonio LainAlberto SuchFrancisco Guerrero
    • Antonio LainAlberto SuchFrancisco Guerrero
    • H04N1/40
    • H04N1/52
    • While powerful in diffusion at one resolution to print photos at a finer resolution, the invention is not thus limited. It defines superpixels (“spels”) for each desired colorimetric level, generates/receives image data, renders by finding levels for image positions, and prints an image using selected spels. One invention aspect finds a randomized value at each found level and uses the value to select the spel from plural ones for each level. Another aspect derives/maintains a randomized-value matrix; and maps a matrix location to an image position, to select a random value at that location and spel for that position. Another uses the value in common for all planes to select a spel for each plane at the found level—compatible spels for different planes, to coordinate color placement in planes. Another controls defining/selecting for a blue-noise property of spels in aggregate. In another, spels defined for a level vary in value to yield nonintegral color quanta. Preferences: Rendering is 1D per color, plus a dummy dimension holding the value (a least-significant bit from rendering, in a color dimension but decorrelated from levels)—and derives/maintains the matrix, derived/corrected for blue noise and including small interleaved 1D matrices tiled across and wrapped around the larger. Mapping uses values as pointers into dimensions of a spel table, and color-plane identification as a pointer into a third table dimension; it uses a common value in all planes to avoid drop-on-drop. Spels are Fourier-screened.
    • 虽然以一种分辨率扩散以更精细的分辨率打印照片,但是本发明并不限于此。 它为每个所需的色度级别定义超像素(“spels”),生成/接收图像数据,通过查找图像位置的级别渲染,并使用选定的图像打印图像。 一个发明方面在每个发现的水平上找到随机化值,并且使用该值为每个级别从多个值中选择所述拼写。 另一方面导出/维护随机值矩阵; 并将矩阵位置映射到图像位置,以在该位置选择随机值,并为该位置进行拼接。 另一个使用所有平面的共同值来为每个平面选择针对不同平面的找到的与水平兼容的拼接,以协调平面中的颜色位置。 另一个用于定义/选择拼接的蓝噪声属性的控件。 在另一个中,定义为一个级别的拼写值有所不同以产生非整体颜色量子。 首选项:渲染是每个颜色的1D,加一个保留值的虚拟维度(从渲染中的最低有效位,在颜色维度上,但与层次相关),并导出/维护矩阵,导出/校正蓝色噪声,包括小 交错的1D矩阵平铺并围绕较大的。 映射使用值作为指针,并将颜色平面识别作为指向第三个表维度的指针; 它在所有平面中使用公共值来避免掉线。 刺激是傅立叶筛选的。