Image forming method for increasing resolution in reverse mode

摘要

An image forming apparatus comprising: a resolution conversion unit configured to convert the resolution of a pixel provided by input image data; a gradation conversion unit configured to perform matrix conversion onto the pixel; and a writing unit configured to perform a write operation, wherein, in the normal mode, the gradation conversion unit performs matrix conversion onto the pixel with reference to the gradation conversion table for the normal mode, and the writing unit performs the write operation of the pixel in a normal order that is the order image data being input into the image forming apparatus, and in the reverse mode, the gradation conversion unit performs matrix conversion onto the pixel with reference to the gradation conversion table for the reverse mode, and the writing unit performs the write operation of the pixel in a reverse order opposite to the normal order.

主权项

1. An image forming apparatus, comprising:
processing circuitry configured to
increase resolution of pixels provided by input image data by at least a factor of two in both a main scanning direction and a sub scanning direction; andperform matrix conversion of each pixel whose resolution is increased, with reference to a gradation conversion table; and writing circuitry configured to perform a write operation according to the matrix-converted pixels, wherein the image forming apparatus includes a normal mode and a reverse mode, in the normal mode, the processing circuitry performs the matrix conversion of the pixels with reference to the gradation conversion table, and the writing circuitry performs the write operation of the pixels in a normal order, which is an order image data is input into the image forming apparatus, and in the reverse mode, the processing circuitry reverses the normal order of the pixels in the main-scanning direction and performs matrix conversion of each reversed pixel with reference to the gradation conversion table to generate odd and even dots, each having subpixels, wherein the subpixels corresponding to the odd dots are replaced with the subpixels corresponding to the even dots, and the writing circuitry performs the write operation of the reversed pixels.