首页> 外国专利> Modifications of postscript adaptive data compression (ADC) for 3 plane, 8 bit color images, JPEG lossy compression, and variable Q factors

Modifications of postscript adaptive data compression (ADC) for 3 plane, 8 bit color images, JPEG lossy compression, and variable Q factors

机译:对3平面,8位彩色图像,JPEG有损压缩和可变Q因子进行后记自适应数据压缩(ADC)的修改

摘要

An image compression system includes a source, a memory, a personality/graphics engine having a personality and a graphics engine, a memory allocator and an image processor. The source is operative to supply digital data representative of images. The memory has a finite size for receiving the digital data. The personality is configured to interpret an input file and is operative to construct image patches from the digital data. The graphics engine is operative to generate a display list from the memory. The memory allocator is associated with the memory and is operative to allocate image patches. The image processor includes a JPEG compressor and a JPEG decompressor. The image processor is operative to render the display list into strip buffers. The JPEG compressor is operative to JPEG compress images on the display list. The JPEG decompressor is operative to decompress compressed images on the display list. The image processor is operative to uncompress the compressed patch data and copy each bit in the image patch into the strip buffers. A method is also disclosed.
机译:图像压缩系统包括源,存储器,具有个性的个性/图形引擎和图形引擎,存储器分配器和图像处理器。该源可操作以提供代表图像的数字数据。存储器具有用于接收数字数据的有限大小。个性配置为解释输入文件,并且可用于根据数字数据构造图像块。图形引擎可操作以从存储器生成显示列表。存储器分配器与存储器相关联并且可操作来分配图像补丁。图像处理器包括JPEG压缩器和JPEG解压缩器。图像处理器可操作以将显示列表渲染到条带缓冲器中。 JPEG压缩器可用于JPEG压缩显示列表上的图像。 JPEG解压缩器用于解压缩显示列表上的压缩图像。图像处理器可操作以解压缩压缩的补丁数据并将图像补丁中的每个位复制到剥离缓冲器中。还公开了一种方法。

著录项

  • 公开/公告号US6192157B1

    专利类型

  • 公开/公告日2001-02-20

    原文格式PDF

  • 申请/专利权人 HEWLETT-PACKARD COMPANY;

    申请/专利号US19980181075

  • 发明设计人 TIMOTHY M. PREBBLE;

    申请日1998-10-27

  • 分类号G06K93/60;G06K94/60;

  • 国家 US

  • 入库时间 2022-08-22 01:05:05

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