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    • 3. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US6043897A
    • 2000-03-28
    • US948647
    • 1997-10-10
    • Takeshi MorikawaTomoyuki AtsumiEiichiro KawasakiEiichi YoshidaYoshikazu IkenoueAkio Nakajima
    • Takeshi MorikawaTomoyuki AtsumiEiichiro KawasakiEiichi YoshidaYoshikazu IkenoueAkio Nakajima
    • H04N1/32G06K15/00
    • H04N1/32593H04N1/00954H04N1/32561H04N2201/0081H04N2201/0082H04N2201/0087H04N2201/329
    • In an image forming apparatus for reading a document image and forming the document image on a paper, document image data are divided into a plurality of blocks and the document image data are compressed in the unit of block to be stored in a first memory device. The data read from the first memory device are expanded in the unit of block to be stored in a second memory device. Compression time and expansion time are estimated and image output start time for a printer is set based on the compression and expansion times before expansion of all the blocks is completed. In a different way, the start time is set to read data from a second memory device by a printer for printing, after estimation based on expansion time on data not yet expanded by an expansion device. In a still different way, predetermined form data such as page number are superposed with image data. The form data is drawn first in a page memory device and expanded image data are superposed next in the page memory device. Print is started by taking drawing time of the form data into account.
    • 在用于读取文件图像并在纸张上形成文档图像的图像形成装置中,文档图像数据被划分成多个块,并且以块为单位压缩文档图像数据以存储在第一存储装置中。 从第一存储设备读取的数据以块为单位进行扩展以存储在第二存储设备中。 估计压缩时间和扩展时间,并且基于所有块的扩展之前的压缩和扩展时间来设置打印机的图像输出开始时间。 以不同的方式,在通过扩展装置还未扩展的数据的扩展时间进行估计之后,开始时间被设置为由用于打印的打印机从第二存储装置读取数据。 以不同的方式,将诸如页码的预定表格数据与图像数据叠加。 首先在页面存储装置中绘制表单数据,并且随后将扩展的图像数据叠加在页面存储装置中。 通过考虑表单数据的绘制时间来开始打印。
    • 5. 发明授权
    • Digital copying machine, image reading device used in said digital
copying machine, and image processing method used in these devices
    • 数字复印机,所述数字复印机中使用的图像读取装置,以及在这些装置中使用的图像处理方法
    • US5969828A
    • 1999-10-19
    • US942396
    • 1997-10-10
    • Eiichiro KawasakiTakeshi MorikawaTomoyuki AtsumiEiichi YoshidaYoshikazu Ikenoue
    • Eiichiro KawasakiTakeshi MorikawaTomoyuki AtsumiEiichi YoshidaYoshikazu Ikenoue
    • H04N1/387H04N1/41
    • H04N1/0071H04N1/00737H04N1/3877H04N1/41
    • In the image data processing of the digital copying machine (M), number of blocks Bn of image data in auxiliary scanning direction is set to the number of expanders (30, 31) Dn times a natural number N (N.times.Dn). This configuration makes it possible to utilize the (30, 31) expanders efficiently regardless of whether the image is to be rotated by 90.degree. or not when expanding compressed image data and printing the image. Thus such a situation that the expanders (30, 31) are forced to suspend the expanding operation does not occur, making it possible to start printing earlier and improve the printing speed. In the image reader 1 of the digital copying machine (M), when dividing image data corresponding to original document into a plurality of blocks and compressing the image data in the unit of block, length of the original document in the auxiliary scanning direction is estimated from width of the original document (size in principal scanning direction). Then by setting the partition of divided blocks based on the estimated document length, the image data can be compressed without waiting for the end of image data input for each block, not doing over the compression process even when the end of the original document is detected, thereby maximizing the image data compressing speed.
    • 在数字复印机(M)的图像数据处理中,辅助扫描方向上的图像数据的块数Bn被设置为自然数N(N×Dn)的扩展器(30,31)的数量Dn倍。 无论在扩展压缩图像数据和打印图像时是否要将图像旋转90°,这种配置使得可以有效地利用(30,31)扩展器。 因此,不会发生扩张器(30,31)被迫暂停膨胀操作的情况,从而可以更早地开始打印并提高打印速度。 在数字复印机(M)的图像读取器1中,当将与原稿对应的图像数据分割成多个块并以块为单位压缩图像数据时,估计原稿在辅助扫描方向上的长度 从原始文档的宽度(主扫描方向的大小)。 然后,通过基于所估计的文档长度来设定分割块的划分,可以压缩图像数据,而不用等待每个块输入的图像数据的结束,即使在检测到原始文档的结束时也不进行压缩处理 从而使图像数据压缩速度最大化。