| 摘要 |
A scanning apparatus (1) for reading an image, comprises a line sensor (2) comprising a plurality of aligned sensing devices for reading an image of a document, a motor (6) for moving the line sensor (2) and the document relatively at right angles to the aligned sensing devices, an analogue-to-digital converter (3) for converting a first analogue image signal from the line sensor (2) to a first digital image signal, a memory (4) for storing the first digital image signal, a memory controller (8) for generating a write signal for the memory (4) and for appointing an address at which the first digital image signal is written in the memory (4) according to each writing mode, each writing mode being used to determine a sequence to appoint the address, a selecting circuit (9) for selecting the writing mode by controlling the memory controller (8), and a digital-to-analogue converter (5) for converting a second digital image signal from the memory (4) to a second analogue image signal.
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