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    • 1. 发明申请
    • IMAGE COMPRESSION
    • 图像压缩
    • WO2010018494A1
    • 2010-02-18
    • PCT/IB2009/053431
    • 2009-08-06
    • NXP B.V.LI, ShuoRIEMENS,, Abraham KarelHENRIKSSON, TomasVAN DER WOLF, Pieter
    • LI, ShuoRIEMENS,, Abraham KarelHENRIKSSON, TomasVAN DER WOLF, Pieter
    • G06T9/00H04N7/32H04N7/26H04N1/64
    • H04N1/644H04N19/11H04N19/172H04N19/182H04N19/593H04N19/91
    • An image compression unit for compressing image data (ID) having a plurality of pixels, each with one or more color samples, into a compressed format (CF) is provided. The image compression unit comprises a color lookup table generation unit (311) for generating a color lookup table having one or more colors and for transmitting the color lookup table in the compressed format (CF). The image compression unit further comprises a pixel mode determination unit (312) for determining for at least one pixel of the image data (ID) a pixel mode and for transmitting for the at least one pixel a pixel mode identifier for identifying the pixel mode in the compressed format (CF). A first pixel mode corresponds to the case that the at least one pixel matches one of the one or more colors in the color lookup table and a second pixel mode corresponds to the case that the at least one pixel does not match one of the one or more colors in the color lookup table. The image compression unit further comprises a color lookup table encoding unit (313) for encoding pixels whose pixel mode is the first pixel mode and a predictive encoding unit (314) for predictively encoding pixels whose pixel mode is the second pixel mode.
    • 提供一种图像压缩单元,用于将具有多个像素的图像数据(ID)分别压缩成压缩格式(CF),每个像素具有一个或多个颜色样本。 图像压缩单元包括用于生成具有一种或多种颜色并用于以压缩格式(CF)发送颜色查找表的颜色查找表的颜色查找表生成单元。 图像压缩单元还包括像素模式确定单元(312),用于为像素模式中的图像数据(ID)的至少一个像素确定像素模式,并且为至少一个像素发送用于识别像素模式的像素模式标识符 压缩格式(CF)。 第一像素模式对应于至少一个像素匹配颜色查找表中的一种或多种颜色之一的情况,而第二像素模式对应于至少一个像素不匹配一个或多个颜色之一的情况 在颜色查找表中有更多的颜色。 图像压缩单元还包括用于编码其像素模式是第一像素模式的像素的颜色查找表编码单元(313)和用于预测编码其像素模式是第二像素模式的像素的预测编码单元(314)。