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Image conversion method and device, terminal, storage medium

An image conversion and image technology, applied in image analysis, image enhancement, image communication and other directions, can solve the problems of affecting the display effect, insufficient brightness contrast of bright parts, unstable image display contrast, etc., to improve the screen display effect, reduce Computational complexity, effects of stable display contrast characteristics

Active Publication Date: 2019-11-05
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, due to the lack of brightness contrast in the dark part of the Gamma function in SDR display and the high contrast in the bright part of the picture, the dynamic contrast algorithm needs to dynamically adjust the brightness of the dark part and the bright part of the picture to a large extent in real time when operating based on the Gamma function, which is likely to cause image distortion. In case of unstable contrast
[0004] Therefore, the existing method of converting an SDR image into an HDR image based on a dynamic contrast ratio algorithm easily leads to unstable image display contrast, affects the display effect, and involves complex image conversion calculations

Method used

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  • Image conversion method and device, terminal, storage medium
  • Image conversion method and device, terminal, storage medium
  • Image conversion method and device, terminal, storage medium

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0027] figure 1 It is a flow chart of the image conversion method provided by Embodiment 1 of the present invention. This embodiment is applicable to the case of image conversion. The method can be executed by an image conversion device, which can be implemented by software and / or hardware. It can also be integrated on terminals that support interface display, such as televisions, computers, and mobile terminals. Such as figure 1 As shown, the method specifically includes:

[0028] S110. Acquire input data of a standard dynamic lighting rendering image, and perform gamma correction.

[0029] The acquired input data of the standard dynamic light rendering image includes image display content data and electro-optical conversion (EOTF) or optical-electrical conversion (OETF) data of a terminal supporting standard dynamic light rendering image display. The electro-optical conversion or photoelectric conversion data of the terminal affects the display brightness characteristics ...

Embodiment 2

[0046] figure 2 It is a flow chart of the image conversion method provided by Embodiment 2 of the present invention, and this embodiment is further optimized on the basis of the foregoing embodiments. Such as figure 2 As shown, the method includes:

[0047] S210. Acquire input data of a standard dynamic lighting rendering image, and perform gamma correction.

[0048] S220. Perform mapping processing on the gamma-corrected input data.

[0049] S230. Obtain linear luminance data corresponding to the HDR image format based on the data after the mapping process.

[0050] Mapping the input data after gamma correction is the basis of image data format conversion. Specifically, the input data after gamma correction can be mapped to the data before gamma correction, and the mapping process can ensure two The corresponding relationship between the data of the image type will not be disordered, so as to avoid causing errors in information displayed on the converted display screen....

Embodiment 3

[0061] image 3 It is a flow chart of the image conversion method provided by Embodiment 3 of the present invention, and this embodiment is further optimized on the basis of the foregoing embodiments. Such as image 3 As shown, the method includes:

[0062] S310. Acquire input data of a standard dynamic lighting rendering image, and perform gamma correction.

[0063] S320. Based on the first gamma value, perform a first adjustment to the input data of the standard dynamic lighting rendering image.

[0064] The input data after the first adjustment can be expressed as:

[0065] L 1 =V γ11 (L W -L B )+L B ,0≤V≤1,

[0066] L 1 It may be the electro-optical conversion data of a terminal that supports standard dynamic light rendering image display after the first adjustment, wherein, V is the normalized input data of standard dynamic light rendering image, and optionally, the first gamma value γ 11 The preferred value is 2.2.

[0067] S330. Perform mapping processing on...

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Abstract

The embodiment of the present invention discloses an image conversion method and device, a terminal, and a storage medium, wherein the method includes: acquiring input data of a standard dynamic lighting rendering image, and performing gamma correction; converting the input data after gamma correction into The linear luminance data corresponding to the HDR image format; according to the linear luminance data, the display luminance data of the HDR image is obtained for image display after format conversion. The embodiments of the present invention can realize the effect of stabilizing the display contrast characteristic in the image conversion process and reducing the computational complexity, and improving the screen display effect.

Description

technical field [0001] The embodiments of the present invention relate to the field of display technology, and in particular, to an image conversion method and device, a terminal, and a storage medium. Background technique [0002] Compared with the standard dynamic lighting rendering (Standard-Dynamic Range, SDR) display technology, the high-dynamic lighting rendering (High-Dynamic Range, HDR) display technology can bring users a more realistic and excellent image quality look and feel. [0003] Due to the inherent limited contrast of SDR images, adding a dynamic contrast algorithm to SDR display is usually a method to obtain higher contrast effects on the LCD TV platform. However, the study of the characteristics of Rec.709 and Rec.1886 shows that the above two gamma functions focus on simulating the display characteristics of a Cathode Ray Tube (CRT), rather than making up for the lack of contrast of LCD TVs. In particular, due to the lack of brightness contrast in the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64H04N9/69
CPCH04N9/646H04N9/69H04N9/68G06T2207/20208G06T5/92
Inventor 黄哲
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD