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Image processing apparatus and image processing method

一种图像处理装置、图像数据的技术，应用在图像数据处理、图像增强、图像分析等方向，能够解决无法适当地调整输入图像数据动态范围等问题

Active Publication Date: 2016-01-27
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] As mentioned above, according to the prior art, the dynamic range of the input image data cannot be properly adjusted

Method used

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  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method
  • Image processing apparatus and image processing method

Examples

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no. 1 example

[0051] An image processing device and an image processing method according to a first embodiment of the present invention will be described below.

[0052] Note that an example of a case where the image processing device is an image display device will be described below, but the present invention is not limited thereto, and the image processing device may be a device provided separately to the image display device.

[0053] An example in which the pixel value of image data is a YCbCr value (a combination of Y value, Cb value, and Cr value) and the Y value (brightness value) is adjusted will be described below, but the present invention is not limited thereto. Instead, the pixel value of image data is also Can be RGB value (combination of R value, G value and B value). In this case, the R value, G value, and B value can be adjusted separately.

[0054] figure 1 is a block diagram showing an example of the functional configuration of the image processing device (image display d...

no. 2 example

[0164] An image processing apparatus and an image processing method according to a second embodiment of the present invention will now be described.

[0165] In the first embodiment, in Section 2, display image data is generated by compositing the gradation values ​​of the basic image data and the gradation values ​​of the HDR image data. Therefore, in the first embodiment, the larger the weight applied to the basic image data (ie, the smaller the luminance range value YR), the larger the grayscale value on the low grayscale side. In other words, the display luminance of an image region having a gradation value on the low gradation side (ie, a low gradation region) increases as the luminance range value YR decreases.

[0166] Therefore, in this embodiment, it will be described that regardless of the brightness range value YR, in interval 2, it is possible to generate that the minimum grayscale value of the dynamic range of the display image data is the same as the minimum gray...

no. 3 example

[0229] An image processing apparatus and an image processing method according to a third embodiment of the present invention will now be described.

[0230] In the first and second embodiments, an example in which display image data is generated using basic image data and HDR image data is described.

[0231] In this embodiment, an example of generating display image data using basic image data and luminance difference data will be described.

[0232] Figure 10is a block diagram showing an example of the functional configuration of the image processing apparatus 300 according to the present embodiment.

[0233] Such as Figure 10 As shown, the image processing device 300 includes a display unit 106, a brightness difference data conversion unit 301, an image conversion unit 302, and the like.

[0234] Note that in Figure 10 In, the same functional unit and data as the first embodiment ( figure 1 ) are assigned the same reference numerals as those of the first embodiment,...

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Abstract

The invention provides an image processing apparatus and an image processing method. The image processing apparatus according to the present invention includes: an obtaining unit configured to obtain a brightness range value; and a generating unit configured to generate a display-image data on the basis of the brightness range value obtained by the obtaining unit, wherein the generating unit generates the display-image data on the basis of two or more of first image data, second image data, and brightness difference data such that, when the brightness range value obtained by the obtaining unit is within a predetermined range, a maximum gradation value of the dynamic range of the generated display-image data steadily approaches a maximum gradation value of the dynamic range of the first image data as the brightness range value obtained by the obtaining unit decreases.

Description

technical field [0001] The present invention relates to an image processing device and an image processing method. Background technique [0002] In recent years, high dynamic range (HDR) display, which uses multi-bit image data to obtain a display image (an image displayed on a screen) with a wider dynamic range than conventional display images, has become increasingly popular. [0003] As a method of recording HDR image data (multi-bit image data) with a wide dynamic range, a method of dividing HDR image data into basic image data and luminance difference data and recording the basic image data and luminance difference data (JP Publication No. 2011-193511). In other words, a format using basic image data and luminance difference data is proposed as a data format of HDR image data. [0004] The basic image data is image data composed of a small number of bits obtained by gradation-compressing (downsampling) HDR image data. For example, basic image data is approximately 8-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235G06T5/00
CPCG06T2207/20208G06T5/50G06T2207/20221G09G5/377G09G2320/0673G09G2320/0626G09G2320/0666G06T5/92
Inventor 中谷敏树山岸正治
Owner CANON KK