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Image processing device and image processing method

An image processing device and image technology, applied in image data processing, image data processing, image communication, etc., can solve difficult problems such as image color balance

Active Publication Date: 2012-11-28
FUJIFILM BUSINESS INNOVATION CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Japanese Patent Application Laid-Open No. 2009-290660 In view of the problem that, as a result of correcting an image shot against the light, the color of the bright part in the image is eliminated, or it is difficult to properly adjust the color balance of the entire image, discloses a image processing device

Method used

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  • Image processing device and image processing method
  • Image processing device and image processing method
  • Image processing device and image processing method

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Embodiment Construction

[0062] In order to facilitate the understanding of the exemplary embodiment of the present invention, the technology underlying the exemplary embodiment of the present invention will first be explained.

[0063] exist Figure 31A In , the photography target document 3100 is a business card, and includes not only a black and white part but also a color part. More specifically, the figure shown on the upper right side of the object document 3100 is a red mark (logo). For example, using a digital camera to photograph the object document 3100 Figure 31C Photographic image 3130 is shown. Photographic image 3130 exhibits image degradation such as Figure 31B Fog image 3120 is shown occurring and superimposed on photographic image 3130 . There are many reasons for the fog image 3120, such as uneven lighting, shooting against the light, the position of the object document 3100 (that is, the positional relationship between the object document 3100, lighting, and image capturing eq...

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Abstract

An image processing device and an image processing method. The image processing apparatus includes: a receiving device for receiving an image; an estimating device for estimating, for each of pixels within the image received by the receiving device, on the basis of the received image, an amount of fog, which is a difference between a luminance value of the pixel and an original luminance value of the pixel; a measuring device for measuring, for each of the pixels within the image received by the receiving device, a chroma value of the pixel; a determining device for determining a correction target value for luminance values of pixels of a background portion within the image received by the receiving device; and a correcting device for correcting the chroma value of the pixel measured by the measuring device on the basis of the amount of fog estimated by the estimating device, the correction target value determined by the determining device, and a distance from the chroma value to an achromatic color.

Description

technical field [0001] The present invention relates to an image processing device and an image processing method. Background technique [0002] Japanese Patent No. 3426189 discloses an image processing method, the method comprising: the step of dividing an input image into pixel groups, each pixel group having a predetermined size; the step of calculating the pixel group density of each divided pixel group; a step of calculating an output value of the pixel of interest of the input image based on the absolute density of the pixel and the relative density of the pixel of interest based on the pixel group density of the pixel group to which the pixel of interest belongs and the pixel group adjacent to the pixel group to which the pixel of interest belongs The pixel group density is calculated. According to this image processing method, in a multivalued image, characters written with a pen of a darker color than the background are extracted at high speed, used for preprocessi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/60H04N1/407G06T5/40
CPCH04N1/6086G06T1/00H04N1/407H04N9/64H04N1/6027H04N1/60G06T5/40G06T5/00
Inventor 福永正和
Owner FUJIFILM BUSINESS INNOVATION CORP
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