Chart, image forming apparatus, image processing apparatus, and storage medium

Patent metadata

Field	Value
Publication number	US-2022311908-A1
Application number	US-202217654273-A
Country	US
Kind code	A1
Filing date	Mar 10, 2022
Priority date	Mar 24, 2021
Publication date	Sep 29, 2022
Grant date	—

Abstract

A chart includes a plurality of area images. Each area image of the plurality of area images includes a figure. The figure indicates positional information of each area image of the plurality of area images in the chart. An image forming apparatus includes an image forming device configured to form an image on a sheet to create the chart, and an image reading device configured to read the image in the chart.

First claim

What is claimed is:

1 . A chart comprising:
a plurality of area images, each area image of the plurality of area images including a figure, the figure indicating positional information of each area image of the plurality of area images in the chart.

2 . The chart according to claim 1 ,
wherein the figure includes at least one of a bar code or a two-dimensional code.

3 . The chart according to claim 1 ,
wherein each area image of the plurality of area images includes a mark indicating a range of each area image of the plurality of area images in the chart.

4 . The chart according to claim 1 ,
wherein the figure further indicates information on an image forming condition.

5 . The chart according to claim 1 ,
wherein each area image of the plurality of area images includes a correction pattern used to correct density of the plurality of area images.

6 . The chart according to claim 5 ,
wherein the figure further indicates density information of the correction pattern.

7 . The chart according to claim 6 ,
wherein the correction pattern is a pattern formed by an image forming apparatus including an image density sensor, and wherein the figure further indicates detection value information of density detected by the image density sensor.

8 . The chart according to claim 5 , further comprising a medium having the correction pattern of a predetermined density, and
wherein the medium is attached on the chart.

9 . An image forming apparatus comprising:
an image forming device configured to form an image on a sheet to create the chart according to claim 1 ; and an image reading device configured to read the image in the chart.

10 . An image processing apparatus comprising processing circuitry configured to process a read image of a chart including a plurality of area images, each area image of the plurality of area images including a figure, the figure indicating positional information of the plurality of area images in the chart, and a correction pattern to correct density of the plurality of area images in the chart,
the processing circuitry being configured to correct density of the read image based on density of the correction pattern in the read image of the chart.

11 . A non-transitory, computer-readable storage medium storing computer-readable program code that causes a computer to execute:
processing a read image of a chart including a plurality of area images, each area image of the plurality of area images including a figure, the figure indicating positional information of the plurality of area images in the chart, and a correction pattern to correct density of the plurality of area images in the chart; and correcting density of the read image based on density of the correction pattern in the read image of the chart.

Assignees

• Watanabe Naoto
• Ricoh Co Ltd

Inventors

• Watanabe Naoto

Classifications

• H04N2201/3269

  of machine readable codes or marks, e.g. bar codes or glyphs · CPC title

• H04N1/6072 Primary

  adapting to different types of images, e.g. characters, graphs, black and white image portions · CPC title

• H04N1/00015

  Reproducing apparatus · CPC title

• H04N1/233

  according to characteristics of the data to be reproduced, e.g. number of lines · CPC title

• H04N1/00334

  with an apparatus processing barcodes or the like (arrangements for sensing record carriers G06K7/00) · CPC title