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High-dynamic-range image synthesis method, apparatus, terminal device, and storage medium

A high dynamic range, image synthesis technology, applied in the field of image processing, can solve problems such as improving brightness, increasing dynamic range, etc., to achieve the effect of improving brightness, increasing dynamic range, and suppressing overexposed areas

Active Publication Date: 2019-01-15
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology

[0004] The embodiment of the present application proposes a high dynamic range image synthesis method, device, terminal equipment, and storage medium, which can solve the problem that the small aperture of the terminal equipment cannot simultaneously increase brightness, suppress overexposed areas, increase dynamic range, and maximize Technical issues for possible reduction of noise conditions

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Embodiment Construction

[0017] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

[0018] The high dynamic range image synthesis method, device, terminal device, and computer-readable storage medium of the embodiments of the present application are described below with reference to the accompanying drawings.

[0019] In related technologies, in the night scene HDR algorithm, a few frames of low dynamic range images with different EVs are usually taken to form a high dynamic range image, and some spatial noise reduction methods may be added to reduce noise. However, in general, in order to ensure that the s...

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Abstract

Embodiments of the present application disclose a high-dynamic-range image synthesis method, an apparatus, a terminal device, and a storage medium. The method comprises the following steps of: determining a shooting mode used in the current shooting; A plurality of exposure values corresponding to the shooting mode are used to continuously shoot the same scene to obtain a plurality of frames of images, wherein the plurality of exposure values are distributed at linear intervals, and the number of frames of the continuously shot images depends on the type of the shooting mode; Aligning and calibrating the multi-frame images, and respectively determining highlight regions and shadow regions in the aligned and calibrated multi-frame images; A high dynamic range image is obtained by synthesizing the highlight region and the shadow region of each frame image with corresponding overlapping weights. This method can improve the brightness, restrain the over-exposure area, increase the dynamicrange and reduce the noise of the image.

Description

technical field [0001] The present application relates to the technical field of image processing, and in particular to a high dynamic range image synthesis method, device, terminal equipment and a computer-readable storage medium. Background technique [0002] In the related art, the acquisition method of a high dynamic range image (High-Dynamic Range, referred to as HDR) is to retrospectively estimate the actual scene brightness through ordinary images with different EV values ​​(Exposure Value, exposure value) with large frame intervals, and use The actual scene brightness is synthesized to obtain HDR images, and the effect of high dynamic range is achieved by using the least resource synthesis. However, scene shooting at night is a more severe test for such algorithms, because night scenes are often accompanied by high-brightness contrast signs or moving objects, and the small size of the camera sensor in terminal devices (such as mobile phones, etc.) If the aperture is...

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Application Information

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IPC IPC(8): H04N5/232H04N5/235H04N5/265
CPCH04N5/265H04N23/80H04N23/741
Inventor 张弓
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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