| 摘要 |
PURPOSE:To enable to obtain images with high gradation and high resolution, by a method wherein multiple recording is conducted on the same part by using a repeatedly usable recording ink film, and an image output with an intermediate gradation is obtained by varying the picture element density. CONSTITUTION:Picture element basis data fed from an interface 21 are stored in an input data memory 22, are sorted into 4-value levels by a gradation-processing part 23 in correspondence with a multi ink film having a density of 1/3 times of the maximum attainable density, and are stored in an output data memory 24. When recording is started, since the data from the memory 24 comprises picture element signals each of which corresponds to one of the 4-value levels, the number of times of electric current heating pulses fed to a thermal head 29 is selected in accordance with the tetravalent level signal, and 4 levels of recorded densities can be obtained for each of the tetravalent levels. During this period, such a control as not to feed a recording paper or the ink film is performed by a CPU25 through a mechanism controller 26. Accordingly, an image output with an intermediate gradation can be obtained by varying the picture element density. |
