| 摘要 |
An image forming apparatus includes a digital image signal input, and image former for forming an image of predetermined elements on a recording medium by scanning a recording medium in response to the digital image signal in first and second scanning directions, and a corrector for correcting the size of the predetermined elements in different first or second modes in relation to the first and second directions. Also provided are a generator for generating a recording beam to irradiate the recording medium, and a modulator for modulating the recording beam in response to the digital image signal. The corrector corrects the intensity of the recording beam and the irradiation duration thereof. A converter converts characteristics of the digital image signal and outputs the converted digital image signal. The converter includes a plurality of tables employed to perform the conversion. A processor processes the outputted converted digital image signal and generates a pulse-width modulated signal on the basis of the level of the converted digital image signal. A discriminator discriminates whether the input digital image signal represents a thin line image or an edge image and selects one of the tables in accordance with the discrimination results.
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