公开(公告)号：US6137589A

公开(公告)日：2000-10-24

申请号：US137714

申请日：1998-08-21

申请人： Pere Obrador ,  Jordi Gonzalez ,  Jae Noh

发明人： Pere Obrador ,  Jordi Gonzalez ,  Jae Noh

IPC分类号： G06T9/00 ,  H04N1/411 ,  B41B15/00 ,  B41J15/00 ,  G06F15/00

CPC分类号： G06T9/007 ,  H04N1/411

摘要： Already stored uncompressed raster data are selectively compressed before any new raster data can be processed and stored. Both compressed and uncompressed raster data is preferably stored in the same size blocks, and the Raster Objects are preferably divided at Render Swath boundaries. Assuming that the Raster Object data has been or will be compressed by means of a known dither matrix, that dither matrix is used in the compression process to eliminate all but the data essential to reconstruct the dithered image, and the pixels of the original image are preferably successively processed along a predetermined scan path and the resultant linear pixel array is divided into successive runs which may each be encoded such that when those encoded runs are assembled into a replica of the original image and both the original image and the replica image are dithered with the same predetermined dither matrix, the dithered replica image is identical to the dithered original image. The dither-matrix based compression of the raster data is preferably followed by Golomb Rice compression.

摘要翻译： 在可以处理和存储任何新的光栅数据之前，已经存储的未压缩光栅数据被选择性地压缩。 压缩和未压缩的栅格数据都优选地存储在相同大小的块中，并且栅格对象优选地在渲染栅极边界处被划分。 假设光栅对象数据已经或将通过已知的抖动矩阵进行压缩，则在压缩处理中使用该抖动矩阵以消除重建抖动图像所必需的所有数据，并且原始图像的像素为 优选地沿着预定扫描路径连续处理，并且所得到的线性像素阵列被划分成连续的运行，每个运行可以被编码，使得当这些编码的运行被组装成原始图像的副本并且原始图像和副本图像都被抖动 使用相同的预定抖动矩阵，抖动的复制图像与抖动的原始图像相同。 栅格数据的基于抖动矩阵的压缩优选地跟随着Golomb Rice压缩。

公开(公告)号：US07185963B1

公开(公告)日：2007-03-06

申请号：US09495886

申请日：2000-02-01

申请人： Victor Alfaro ,  Pere Obrador ,  Jordi Gonzalez

发明人： Victor Alfaro ,  Pere Obrador ,  Jordi Gonzalez

IPC分类号： B41J2/205 ,  G06K1/00

CPC分类号： G06K15/102

摘要： A sequence of steps for storing an image at a higher resolution in a rendering stage, and making a conversion of the image to a different asymmetrical print resolution. During the conversion corrections are made to avoid losing “on” pixels located on an eliminated row. In some embodiments, an initial narrowing step may occur along the axis of higher resolution and a final horizontal depletion may occur along a carriage scan axis.

摘要翻译： 一种用于在渲染阶段以更高分辨率存储图像并将图像转换成不同的非对称印刷分辨率的步骤序列。 在转换修正期间进行修正以避免丢失位于排除行上的“开”像素。 在一些实施例中，初始变窄步骤可以沿着较高分辨率的轴发生，并且最终的水平耗尽可能沿着支架扫描轴发生。