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Image correction device and video content reproduction device

An image correction and image technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problem that the image quality is not fully improved

Active Publication Date: 2017-04-19
SOCIONEXT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, even with these technologies, there is a problem that the image quality perceived by low-vision viewers is not sufficiently improved.

Method used

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  • Image correction device and video content reproduction device
  • Image correction device and video content reproduction device
  • Image correction device and video content reproduction device

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Experimental program
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Embodiment approach 1

[0081] Hereinafter, the image correction device according to Embodiment 1 will be described with reference to the drawings.

[0082] The image correction device according to Embodiment 1 is an image correction device for generating a corrected image for a low-sighted viewer, and generates a corrected image by overemphasizing at least one of luminance gradation, luminance contour, and hue of an uncorrected image. For post-images, the over-emphasis refers to processing that damages the image quality perceived by visually healthy viewers. Such an image correction mode is called a low vision mode.

[0083] The image correction device may further correct at least one of the luminance grayscale, luminance profile, and hue of the pre-correction image at an intensity suitable for visually healthy viewers. Such an image correction mode is called a standard mode.

[0084] The image correction device may be a dedicated device that only performs image correction in the low-vision mode, ...

Embodiment approach 2

[0159] The digital television receiver according to Embodiment 2 is an example of a video content reproducing device provided with the image correction device described in Embodiment 1, and the image correction device is used when reproducing a broadcast program, which is a video content broadcast by a digital broadcast signal, Performs image correction suitable for low vision viewers.

[0160] Figure 13 It is a block diagram showing an example of the functional configuration of the digital television receiver 2 according to the second embodiment. The digital television receiver 2 includes an acquisition unit 40 and a decoder 50 in addition to the image processor 10 , the controller 20 , and the parameter memory 30 constituting the image correction device 1 .

[0161] The obtaining unit 40 is composed of hardware such as a tuner and an OFDM (Orthogonal Frequency Division Multiplexing) demodulator, and obtains desired video content.

[0162] The decoder 50 is a decoder for d...

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Abstract

This image correction device (1) adds excessive emphasis for reducing image quality as perceived by a viewer with healthy eyesight to at least one of luminance gradation, luminance contour, or color tone in a pre-correction image to thereby generate a corrected image for a viewer with low vision. The image correction device (1) may include: a controller (20) which, in a low-vision mode that is an image correction mode for a low-vision viewer, designates a parameter representing a correction amount greater than the upper limit of a correction amount that does not reduce the image quality as perceived by a viewer with healthy eyesight when the pre-correction image is corrected; and an image processor (10) which generates the corrected image by correcting at least one of luminance gradation, luminance contour, or color tone in the pre-correction image using the correction amount represented by the parameter.

Description

technical field [0001] The present invention relates to an image correction device and a video content playback device, and more particularly to a technique for performing image correction suitable for low-vision viewers. Background technique [0002] In the past, it has been discussed that the technique of image correction is more preferable for the group of people whose visual characteristics are lower than those of healthy people due to, for example, cataracts, diabetic retinopathy, age-related macular degeneration, etc. ) people. [0003] For example, there is a known technique of changing the luminance signal level nonlinearly according to the average luminance level of the image in order to create a bright and easy-to-see image in image reproduction suitable for the visual characteristics of the elderly (for example, Patent Document 1 ). [0004] Patent Document 1 describes the following technology. When correcting the luminance gray scale, a plurality of S-shaped cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/00G09G5/02G09G5/10G06V10/56
CPCG09G5/00G09G5/02G09G2320/08G06T5/40G06T2207/10024G06T2207/20192G09G5/10G09G2320/0626G09G2320/0666G06V20/20G06V10/507G06V10/56G06T5/92G06T5/00
Inventor 影山敦久舟桥和年板仓章太郎
Owner SOCIONEXT INC
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