US 2017/0187916 A1Published application

Image processing device, image forming apparatus, image processing method, and non-transitory recording medium

AssigneeRicoh Company, Ltd.

InventorsNaoki OHTA, Tomonori TANAKA, Mitsutaka IWASAKI, Yuuto WATANABE

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Abstract

An image processing device includes a writing circuit to write image data to an image memory and detect a write line number, a coordinate generating circuit to generate coordinate information based on inclination information, detect a minimum sub-scanning coordinate in each of divided areas of the image data, and generate first read addresses for reading the divided areas from the image memory, a reading circuit to read the divided areas from the image memory and detect a read line number, a reading control circuit to bring the reading circuit into a standby state and cancel the standby state, and a memory control circuit to generate write addresses for writing the divided areas to a memory, sequentially write the read divided areas to the memory, generate second read addresses for reading the divided areas from the memory, and sequentially read the divided areas from the memory.

Claims13

Dependent claims

An image processing device comprising:

a data writing circuit to write image data to an image memory, and detect a write line number representing a number of lines of the image data written to the image memory;
a coordinate generating circuit to
generate 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 that represent a position of each 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,
detect, from the coordinate information, a minimum sub-scanning coordinate in each of a plurality of divided areas of the image data divided by a predetermined division number 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, and
generate first read addresses for reading the plurality of divided areas of the image data from the image memory based on the detected minimum sub-scanning coordinate in the each of the plurality of divided areas of the image data;
a data reading circuit to read the plurality of divided areas of the image data from the image memory based on the first read addresses, and detect a read line number representing a number of lines of the image data read from the image memory;
a reading control circuit to bring the data reading circuit into a standby state in which the data reading circuit stops reading the plurality of divided areas of the image data from the image memory and cancel the standby state based on the write line number, the read line number, and the coordinate information;
and
a memory control circuit to generate write addresses for writing the plurality of divided areas of the image data to a memory based on the coordinate information, sequentially write the plurality of divided areas of the image data read by the data reading circuit to the memory based on the write addresses, generate second read addresses for reading the plurality of divided areas of the image data from the memory based on the coordinate information, and sequentially read the plurality of divided areas of the image data from the memory based on the second read addresses.

6 more elements

An image processing method comprising:

writing image data to an image memory;
detecting a write line number representing a number of lines of the image data written to the 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 that represent a position of each 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 by a predetermined division number 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 detected minimum sub-scanning coordinate 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;
detecting a read line number representing a number of lines of the image data read from the image memory;
stopping and starting the reading the plurality of divided areas of the image data based on the write line number, the read line number, and the coordinate information;
generating write addresses for writing the plurality of divided areas of the image data to a memory based on the coordinate information;
sequentially writing to the memory the plurality of divided areas of the image data read in the reading the plurality of divided areas of the image data based on the write addresses;
generating second read addresses for reading the plurality of divided areas of the image data from the memory based on the coordinate information;
and
sequentially reading the plurality of divided areas of the image data from the memory based on the second read addresses.

10 more elements

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;
detecting a write line number representing a number of lines of the image data written to the 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 that represent a position of each 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 by a predetermined division number 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 detected minimum sub-scanning coordinate 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;
detecting a read line number representing a number of lines of the image data read from the image memory;
stopping and starting the reading the plurality of divided areas of the image data based on the write line number, the read line number, and the coordinate information;
generating write addresses for writing the plurality of divided areas of the image data to a memory based on the coordinate information;
sequentially writing to the memory the plurality of divided areas of the image data read in the reading the plurality of divided areas of the image data based on the write addresses;
generating second read addresses for reading the plurality of divided areas of the image data from the memory based on the coordinate information;
and
sequentially reading the plurality of divided areas of the image data from the memory based on the second read addresses.

10 more elements

Dependencies are inferred from the claim text.