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Image processing device, image processing method, control program, and recording medium

An image processing device and technology of average brightness value, applied in image communication, instruments, televisions, etc., can solve the problem of increasing opportunities for large changes, and achieve the effect of reducing burden and preventing large changes in feeling

Inactive Publication Date: 2019-02-05
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in video-related technologies, high-brightness video such as high dynamic range (HDR) video can be displayed, and there are many opportunities for the brightness perception of each content viewer to change significantly.

Method used

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  • Image processing device, image processing method, control program, and recording medium
  • Image processing device, image processing method, control program, and recording medium
  • Image processing device, image processing method, control program, and recording medium

Examples

Experimental program
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no. 1 approach

[0027] (Image processing device 1)

[0028] Regarding the image processing apparatus 1 of the first embodiment of the present invention, refer to figure 1 Be explained. figure 1 It is a block diagram showing the configuration of the image processing apparatus 1 of this embodiment. Such as figure 1 As shown, a processing unit 2, an input unit 3, and a storage unit 4 are provided.

[0029] The processing section 2 includes a video signal acquisition section 5, a calculation section 6, a reference value setting section 7, and an adjustment section 8. The video signal acquisition unit 5 acquires a video signal for transmission.

[0030] The calculation unit 6 calculates the video feature amount from the parameters of the video signal for transmission. In more detail, the calculation unit 6 respectively calculates a second average brightness value, which is the average brightness value of each frame, among a plurality of frames included in the video signal for transmission acquired by t...

no. 2 approach

[0054] If the second embodiment of the present invention is described, it will be as follows. In addition, in this embodiment, it can be used for the image processing apparatus 1 described in the first embodiment. Therefore, the description of each component in the image processing apparatus 1 is omitted.

[0055] The image processing method of the image processing apparatus 1 of the present embodiment differs from the image processing method of the image processing apparatus 1 of the first embodiment only in steps S11, S12, and S14. Therefore, in the following, detailed descriptions of steps other than steps S11, S12, and S14 corresponding to steps S1, S2, and S4 of the image processing method of the first embodiment are omitted.

[0056] In the image processing method of this embodiment, it is assumed that the brightness value of the transmission video signal acquired by photographing the content is adjusted successively. Reference Image 6 The image processing method of this e...

no. 3 approach

[0061] The third embodiment of the present invention will be described as follows. In addition, in this embodiment, it can be used for the image processing apparatus 1 described in the first embodiment. Therefore, the description of each component in the image processing apparatus 1 is omitted.

[0062] In the image processing methods of the first embodiment and the second embodiment, in step S1 and step S11, respectively, the calculation unit 6 calculates the average brightness value of each frame among a plurality of frames included in the video signal for transmission. The second average brightness value. In the present embodiment, when calculating the frame brightness value of each frame, the calculation unit 6 excludes regions having brightness above a predetermined threshold value and calculates the frame brightness value. As an example, refer to the processing of the calculation unit 6 when the maximum displayable brightness of the display panel is 1000 nit and the prede...

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Abstract

Provided is a technique for preventing a significant change in a viewer's perception of brightness for each content. An image processing device (1) is provided with: a calculating unit (6) which calculates a video feature quantity from a parameter in a video signal for transmission; and an adjusting unit (8) which adjusts the parameter in such a way that the video feature quantity calculated by the calculating unit approaches a prescribed reference value.

Description

Technical field [0001] The present invention relates to an image processing device for adjusting the brightness value of a video signal. Background technique [0002] Among the technologies related to sound, there is known a technique that uses loudness, which is the magnitude of the sound perceived by humans, to uniformize the viewer's perception with respect to the magnitude of the sound of each content. In addition, in video-related technologies, high-brightness videos such as high dynamic range (HDR) videos can be displayed, and there are more opportunities for the brightness of each content viewer to change significantly. [0003] Prior art literature [0004] Patent documents [0005] Patent Document 1: Japanese Laid-Open Patent Publication "Japanese Patent Laid-Open No. 10-322622 (published on December 4, 1998)" Summary of the invention [0006] Technical problem to be solved by the present invention [0007] There are cases where the viewer's perception of brightness varies gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/57
CPCG09G3/20G09G2320/0233G09G2320/0626G09G2360/16H04N5/57G09G5/10H04N5/202
Inventor 铃木秀树西垣智夫樱井凉二吉山和良柴本尚昭
Owner SHARP KK