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1.发明授权Image data compression method involving deleting data in areas where predicted color value, based on color change between adjacent pixels, is small, and image data processing device implementing same method 失效图像数据压缩方法涉及在基于相邻像素之间的颜色变化的预测颜色值较小的区域中删除数据以及实现相同方法的图像数据处理装置
公开(公告)号：US5630036A
公开(公告)日：1997-05-13
申请号：US101698
申请日：1993-08-04
CPC分类号： G06T9/004
摘要： An image data compression method in which reductions in data amount are achieved by deleting some pixel data. Compression is achieved by performing a reading step to read an image as plural pixel data and a deleting step to delete some of the pixel data. A prediction error calculating step calculates a prediction error that represents the difference between the color value pixel data of a pixel in question and the predicted color value thereof, as predicted by a prescribed prediction method from the pixel data of a pixel adjacent thereto. An area classifying step classifies the pixel data of the entire image area into either an abrupt color change areas type in which the prediction error is large or a nonabrupt color change area in which the prediction error is small. The deleting step is performed only on the pixel data classified in the nonabrupt color change area; deleted-position information is appended to the non-deleted pixel data that indicates the position of a pixel whose data has been deleted. This improves the quality of reproduction, since no pixel data are deleted where large errors would be expected to occur in reproduction.
摘要翻译： 一种通过删除一些像素数据来实现数据量减少的图像数据压缩方法。 通过执行读取步骤以将图像读取为多个像素数据和删除步骤来删除一些像素数据来实现压缩。 预测误差计算步骤，根据由与其相邻的像素的像素数据预测的规定的预测方法，计算表示所考虑的像素的色彩值像素数据与预测色彩值之间的差的预测误差。 区域分类步骤将整个图像区域的像素数据分类为预测误差大的突变颜色变化区域类型或其中预测误差小的非中断颜色变化区域。 删除步骤仅对分类在非破坏颜色变化区域中的像素数据执行; 删除位置信息被附加到指示其数据被删除的像素的位置的未删除的像素数据。 这提高了再现的质量，因为没有像素数据被删除，在再现期间会发生大的错误。
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公开(公告)号：US5898794A
公开(公告)日：1999-04-27
申请号：US878201
申请日：1997-06-18
CPC分类号： G06T9/00
摘要： Disclosed is an image processing system including an image input unit, an extraction unit, a plurality of compression process parts and a selection unit to compress a 1-frame image down to a less amount of color information. The image input unit takes in a plurality of frame images per frame. The extraction unit extracts each of the taken-in frame images per unit area of a designated size. The plurality of compression process parts effects compression processes different from each other with respect to pels contained in each unit area. The selection unit selects one compression process part from the plurality of compression process parts for compressing the unit area of the designated size.
摘要翻译： 公开了一种图像处理系统，包括图像输入单元，提取单元，多个压缩处理部分和选择单元，用于将1帧图像压缩到较少量的颜色信息。 图像输入单元每帧拍摄多个帧图像。 提取单元提取每个指定大小的每单位面积的所取入的帧图像。 多个压缩处理部分相对于每个单位区域中包含的像素实现彼此不同的压缩处理。 选择单元从多个压缩处理部分中选择一个压缩处理部分，以压缩指定大小的单位面积。
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公开(公告)号：US5583979A
公开(公告)日：1996-12-10
申请号：US138088
申请日：1993-10-20
CPC分类号： G11B27/102 , H04N9/8042
摘要： The method comprises a read-out step for reading out the image data from a predetermined recording medium according to a frame unit; an image outputting step for image-outputting the frame data read out in the read-out step; a time measuring step for measuring a reproductive processing time taken from a start of reading out in the read-out step to an end of outputting of an image in the image outputting step according to a frame unit; a predicting step for predicting an image output time of next frame data to be reproduced next to the frame data on the basis of the reproductive processing time measured in the time measuring step; a detecting step for detecting an image output time set per frame data from the image data; and a determining step for determining next frame data to be reproduced next to the frame data in accordance with the image output time predicted in the predicting step and the image output time detected in the detecting step.
摘要翻译： 该方法包括：读出步骤，用于根据帧单元从预定的记录介质中读出图像数据; 图像输出步骤，用于图像输出在读出步骤中读出的帧数据; 时间测量步骤，用于根据帧单元测量从读出步骤中的读出开始到图像输出步骤中的图像输出结束所取得的生殖处理时间; 预测步骤，用于基于在时间测量步骤中测量的生殖处理时间来预测要再现在帧数据旁边的下一帧数据的图像输出时间; 检测步骤，用于从图像数据中检测每帧数据设定的图像输出时间; 以及确定步骤，用于根据在预测步骤中预测的图像输出时间和在检测步骤中检测到的图像输出时间来确定要再现在帧数据上的下一个帧数据。
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