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Image processing apparatus, method of controlling the same, and storage medium

A technology of an image processing device and a control method, which is applied in the directions of image communication, printing device, electronic digital data processing, etc., and can solve the problems that the visibility of small-sized text cannot be improved, the text is difficult to read, and the text in small dots is light.

Inactive Publication Date: 2018-10-09
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, width increasing is not performed on smaller text, as doing so would make the text illegible
[0003] However, conventional methods cannot improve the visibility of small-sized text (small-point text)
There is also the problem that small-point text looks lighter than large-sized text (large-point text) even though the text has the same density

Method used

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  • Image processing apparatus, method of controlling the same, and storage medium
  • Image processing apparatus, method of controlling the same, and storage medium
  • Image processing apparatus, method of controlling the same, and storage medium

Examples

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no. 1 example

[0020] figure 1 is a block diagram for describing the configuration of the image forming apparatus 100 according to the first embodiment of the present invention.

[0021] The image forming apparatus 100 is an example of an image processing apparatus according to the present invention, and is a multifunction peripheral (MFP) integrating multiple functions such as a scanning function and a printing function. The control unit 101 comprehensively controls the image forming apparatus 100 , and includes a CPU 105 , RAM 106 , storage unit 107 , device controller 102 , and image processing unit 103 . CPU 105 controls the operation of image forming apparatus 100 by expanding programs stored in storage unit 107 into RAM 106 and executing the programs. The RAM 106 is a temporary memory that can temporarily store image data, programs, and the like. The storage unit 107 is, for example, a hard disk, and stores parameters for controlling the image forming apparatus 100 and applications, ...

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PUM

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Abstract

The invention provides an image processing apparatus, a method of controlling the same, and a storage medium. The image processing apparatus extracts, from color image data, an object having a first density and an object having a second density being higher than the first density, and determines whether or not sizes of the objects each having the first density and the second density are greater than a predetermined size. When converting the color image data into monochromatic image data, an object having the first density and a size less than or equal to the predetermined size is converted tohave a higher density than an object having the first density and a size greater than the predetermined size, and an object having the second density and a size less than or equal to the predeterminedsize is converted to have the same density as an object having the second density and a size greater than the predetermined size.

Description

technical field [0001] The invention relates to an image processing device, its control method and storage medium. Background technique [0002] In recent years, written materials, documents for presentations, etc. are often created in full color. However, documents that are originally in color are often printed in black and white to reduce costs. Therefore, when printing a color image in black and white, it is necessary to perform a process of converting color data into grayscale data. For example, if the original color data is RGB, the conversion process typically uses a color-to-grayscale conversion method in which a formula is used to convert RGB values ​​into a luminance signal (Y), and the obtained value is the same as the original color The value corresponds to the grayscale value. When such color-to-grayscale conversion is used, there is a problem that an image output in black and white will become too light, have poor visibility, etc., depending on the original c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/12B41J3/44B41J29/393
CPCB41J3/445B41J29/393G06F3/1208G06F3/1254G06F3/1279G06K15/1836G06K15/1853H04N1/00326H04N1/40012H04N1/40087G06K15/1835
Inventor 菅原麻子
Owner CANON KK