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    • 42. 发明授权
    • Method for image processing
    • 图像处理方法
    • US06456742B1
    • 2002-09-24
    • US09293339
    • 1999-04-16
    • Kevin Chan
    • Kevin Chan
    • G06K936
    • G06T9/005
    • An image compression/decompression method is provided to improve the speed of data processing after the AD converter outputting the data scanned. The present invention defines a byte as having an attribute code and a counter. Each image data is processed according to the bit planes from high bit to low bit. Every data access to the output data of the A/D converter can read 63(26−1) bytes. The attribute code of each byte represents the type of the encoded codes, such as high/low bit or un-encoded data. The counter, on the other hand, would count the number of consecutive bits having the same value. The encoded image data will be output to a RAM for the host computer to access. For decompression, the host computer will access the RAM. The host computer only need to request the attribute of the data byte to know if the encoded data is high/low bit or un-encoded data. Then, the host computer fills the same number of “1”s or “0”s into a buffer which can store 63 bits of data arranged in the same order as the previously defined blocks according to their attributes. After the buffer is full, the entire data of the buffer will be output to the host computer for further processing.
    • 提供了一种图像压缩/解压缩方法,以提高AD转换器输出扫描数据后的数据处理速度。 本发明将字节定义为具有属性码和计数器。 每个图像数据根据从高位到低位的位平面进行处理。 对A / D转换器的输出数据的每个数据访问可以读取63(26-1)个字节。 每个字节的属性代码表示编码代码的类型,例如高/低位或未编码数据。 另一方面,计数器将计数具有相同值的连续位数。 编码图像数据将被输出到RAM以供主机访问。 对于解压缩,主机将访问RAM。 主机只需要请求数据字节的属性来知道编码数据是高/低位还是未编码数据。 然后,主计算机将相同数量的“1”或“0”填充到可以根据其属性存储按照与先前定义的块相同顺序排列的63位数据的缓冲器。 缓冲区已满后,缓冲区的整个数据将被输出到主机进行进一步处理。