| 摘要 |
The present invention relates to an arrangement and a method for reading in and compression of data for telefax transmission or document reading. The arrangement comprises photo-diodes (1) arranged on a substrate in matrix form, which photo-diodes, in conjunction with picture-processing and signal-processing circuits linked to the photo-diodes and control logic, are executed in integrated form on one and the same substrate. The aforementioned picture-processing and signal-processing circuits comprise a first logic circuit (6), which is so arranged as to detect picture elements in a signal read in by the photo-diodes, which picture elements satisfy a predetermined digital condition. A second logic circuit (7) is so arranged as to detect the edges of the aforementioned picture elements, and a third logic circuit (8) is so arranged as to eliminate elements detected by preceding circuits from the stored signal. The signal is finally converted in a digital network (17) of a combinative or sequential kind into a compressed form suitable for telefax transmission or document reading. |
