Image processing device, image forming apparatus, image processing method, and non-transitory recording medium to correct an inclination of image data in the image memory relative to an output medium

An image processing method comprising:

• writing image data to an image memory;
• generating coordinate information based on inclination information, the coordinate information including a coordinate in a main scanning direction and a coordinate in a sub-scanning direction for each of a plurality of pixels of the image data, representing a position of each of the respective pixels of the plurality of pixels of the image data relative to an output medium onto which the image data is to be output, and the inclination information representing an inclination of the image data in the image memory relative to the output medium;
• detecting, from the coordinate information, a minimum sub-scanning coordinate in each of a plurality of divided areas of the image data divided in the main scanning direction, the minimum sub-scanning coordinate having a minimum value in the each of the plurality of divided areas of the image data in the sub-scanning direction of the image data;
• generating first read addresses for reading the plurality of divided areas of the image data from the image memory based on the minimum sub-scanning coordinate detected in the each of the plurality of divided areas of the image data;
• reading the plurality of divided areas of the image data from the image memory based on the first read addresses;
• writing the plurality of divided areas of the image data to an internal memory;
• generating second read addresses for reading the plurality of divided areas of the image data from the internal memory based on the coordinate information;
• and
• reading the plurality of divided areas of the image data from the internal memory based on the second read addresses, such that the image data read from the image memory with an inclination is able to be output to the output medium with inclination of the image data relative to the output medium sheet corrected.

A non-transitory recording medium storing a program for causing a computer to execute an image processing method, the image processing method comprising:

• writing image data to an image memory;
• generating coordinate information based on inclination information, the coordinate information including a coordinate in a main scanning direction and a coordinate in a sub-scanning direction for each of a plurality of pixels of the image data, representing a position of each of the respective pixels of the plurality of pixels of the image data relative to an output medium onto which the image data is to be output, and the inclination information representing an inclination of the image data in the image memory relative to the output medium;
• detecting, from the coordinate information, a minimum sub-scanning coordinate in each of a plurality of divided areas of the image data divided in the main scanning direction, the minimum sub-scanning coordinate having a minimum value in the each of the plurality of divided areas of the image data in the sub-scanning direction of the image data;
• generating first read addresses for reading the plurality of divided areas of the image data from the image memory based on the minimum sub-scanning coordinate detected in the each of the plurality of divided areas of the image data;
• reading the plurality of divided areas of the image data from the image memory based on the first read addresses;
• writing the plurality of divided areas of the image data to an internal memory;
• generating second read addresses for reading the plurality of divided areas of the image data from the internal memory based on the coordinate information;
• and
• reading the plurality of divided areas of the image data from the internal memory based on the second read addresses, such that the image data read from the image memory with an inclination is able to be output to the output medium with inclination of the image data relative to the output medium sheet corrected.