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Image processing method and mobile terminal

A technology of frame images and image data, applied in the field of image processing methods and mobile terminals, can solve the problems of image distortion, HDR images cannot reflect the real environment of all scenes, etc.

Active Publication Date: 2016-01-06
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides an image processing method to solve the problem that the current HDR image of the smart terminal cannot reflect the real environment of all scenes and the problem of image distortion

Method used

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  • Image processing method and mobile terminal

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Experimental program
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Embodiment 1

[0019] refer to figure 1 , which shows a flow chart of the steps of an embodiment of an image processing method of the present invention, which may specifically include the following steps:

[0020] Step 101 , during the process of shooting a high dynamic range image, acquire each frame of image data collected.

[0021] Dynamic range is also called contrast in digital images, which represents the ratio between the maximum gray value and the minimum gray value within the displayable range of the image; for natural scenes in the real world, dynamic range represents the most The ratio of the brightness of the brightest light to the brightness of the darkest light. For example, in a color digital image, each channel of R (Red, red), G (Green, green), and B (Blue, blue) is stored in a byte of 8 bits, and the representation range of each channel is 0 to 255 Gray scale, here 0~255 is the dynamic range of the image. A high dynamic range refers to a dynamic range with large changes;...

Embodiment 2

[0038] In fact, there are many ways to determine the ambient brightness of the current shooting scene through the brightness information of the image data. Determined, the following will be discussed in detail in conjunction with the preferred implementation of the present invention.

[0039] (1) Determine the ambient brightness by the number of pixels in each grayscale area of ​​the image

[0040] refer to Figure 2A , which shows a flow chart of steps in a preferred embodiment of an image processing method of the present invention, which may specifically include the following steps:

[0041] Step 201, during the process of shooting high dynamic range images, acquire each frame of image data collected.

[0042] When the camera collects image data, the mobile terminal can acquire each frame of image data collected by the camera. In a specific implementation, the mobile terminal may obtain and save X frames of image data collected by the camera. Wherein, X may represent the...

Embodiment 3

[0110] refer to Figure 5A , shows a structural block diagram of a mobile terminal embodiment of the present invention, and the mobile terminal 500 may specifically include an image data acquisition module 501 , an exposure time adjustment module 502 , a photographing module 503 and an image synthesis module 504 .

[0111] The image data acquisition module 501 is configured to acquire each frame of image data collected during the high dynamic range image shooting process.

[0112] The exposure time adjustment module 502 is configured to analyze the brightness of the image data, determine the ambient brightness, and adjust the high dynamic exposure time based on the determined ambient brightness.

[0113] The photographing module 503 is configured to photograph according to the adjusted high dynamic exposure time, and generate various low dynamic range image data.

[0114] Optionally, the shooting module 503 can also be specifically used to control the camera to shoot according ...

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Abstract

Embodiments of the invention provide an image processing method and a mobile terminal, and belong to the technical field of communication. The method comprises the following steps: obtaining image data of collected frames in a high dynamic range image shooting process; analyzing the brightness of the image data, determining ambient brightness, and adjusting a high dynamic exposure time based on the determined ambient brightness; shooting according to the adjusted high dynamic exposure time to generate low dynamic range image data; and calculating the low dynamic range image data according to a preset synthesis algorithm to generate a high dynamic range image. The image processing method provided by the embodiments of the invention can be used for avoiding a high dynamic range image distortion problem caused by a fixedly set high dynamic exposure time and enabling the high dynamic range image to reflect the true environments of all scenes, namely, true details of a picture can be restored.

Description

technical field [0001] The present invention relates to the field of communication technology, and more specifically, to an image processing method and a mobile terminal. Background technique [0002] With the rapid development of science and technology, the popularization of smart terminals is getting faster and faster, and their functions are becoming more and more abundant. A high-dynamic range (High-Dynamic Range, HDR) image function is one of the functions. [0003] Usually, a smart terminal (such as a smart phone) is preset with a fixed exposure time, so that multiple pictures (such as N pictures) can be continuously taken according to the fixed exposure time, and the N pictures are synthesized into one HDR picture through an HDR algorithm. However, in different environments, the smart terminal generates an HDR image based on a fixed exposure time, and the HDR image may not reflect the real environment. For example, when the external light is dark, that is, in a dark ...

Claims

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Application Information

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IPC IPC(8): H04N5/235
Inventor 李明津方超胡鹏翔
Owner VIVO MOBILE COMM CO LTD
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