| 摘要 |
PURPOSE:To apply correction processing even to the heat history before the previous line only by looking the data of the previous line, by performing the correction of history using the gradation density such as the heating temp. of the previous line. CONSTITUTION:The effect of the pixels a-e of a previous line memory 1 and the adjacent pixels a', c' of the line memory 2 concerned on the noticeable pixel b' of the line memory 2 concerned is corrected by the correction circuit of a heat history correction processing part 3 and outputted to the line memory 4 concerned to perform recording. Recording density is determined almost corresponding to the temp. of a head heat generator rather than the apply energy to the head heat generator. Therefore, image data are accumulated in a line memory on the basis of the heating temp. corresponding to recording density and, further, by considering that the temp. a definite time after the finish of heating is almost proportional to the heating temp., the apply energy E(b') to be injected in the pixel b' is made approximate to a primary approximate formula E(b')=f[b'-alphab-beta(a+c)-gamma(a'+c')] (wherein alpha, beta and gamma are a constant of 1 or less and the function f is one for taking the correspondence of temp. and recording energy). |
