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A dark light enhancement method, device, mobile terminal and storage medium
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A technology of dark light and image data, applied in the field of computer vision, to achieve the effects of avoiding damage, improving image quality, and simple operation
Active Publication Date: 2022-06-03
BIGO TECH PTE LTD
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[0005] The embodiment of the present invention proposes a dark light enhancement method, device, mobile terminal and storage medium to solve the problem of how to perform dark light enhancement on video data with limited time and computing power
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Embodiment 1
[0039] Step 101, collecting original image data.
[0050] Step 102, performing denoising processing on the original luminance image data to obtain original illumination image data.
[0055] In the case that the network is relatively shallow, the hardware of the mobile terminal is improved, etc., the denoising algorithm based on deep learning can
[0057] Non-deep learning denoising algorithms can be distinguished as 2DNR (2D Noise Reduction, two-dimensional denoising) and
[0065]
[0068] Joint bilateral filtering utilizes the guided image data I to process the input image data (such as the original luminance image data).
[0069]
[0076] In step 103, image processing is performed on the original illumination image data to generate target illumination image data.
[0077] In this embodiment, as shown in FIG. 2, in 205, image processing may be performed on the original illumination image data to
[0079] Step 104, improve the brightness value of the original illumination image dat...
Embodiment 2
[0124] Step 401, collecting original image data.
[0125] As shown in Figure 5, in S501, the original image data can be divided into original brightness image data representing brightness Y,
[0126] Step 402: Perform filtering processing on the original luminance image data to obtain original illumination image data.
[0135]
[0137] Step 403, down-sampling the original illumination image data to obtain target illumination image data.
[0143] Linear interpolation is performed in the x direction to obtain:
[0144]
[0145]
[0146] Linear interpolation is carried out in the y direction to obtain:
[0147]
[0148] In combination with linear interpolation in the x direction and linear interpolation in the y direction, f(x, y) can be obtained:
[0149]
[0150] Step 404, determine the gamma coefficient.
[0153] Wherein, the gamma correction is to edit the gamma curve of the original illumination image data to correct the original illumination image.
[0155] Step 406, determine t...
Embodiment 3
[0208] The denoising processing module 902 is configured to perform denoising processing on the original luminance image data to obtain the original illumination map
[0215] In an embodiment of the present invention, the original image data further includes an original chromaticity image representing chromaticity
[0217] a weight configuration unit, used for, when the filtering window traverses to the current original luminance pixel point,
[0225] a gamma coefficient determination submodule for determining a gamma coefficient;
[0232] In an embodiment of the present invention, the original image data further includes an original chromaticity image representing chromaticity
[0241] The dark light enhancement device provided by the embodiment of the present invention can perform the dark light enhancement provided by any embodiment of the present invention.
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Abstract
Embodiments of the present invention provide a dark light enhancement method, device, mobile terminal, and storage medium. The method includes: collecting original image data, performing denoising processing on the original brightness image data, obtaining original illumination image data, and processing the original illumination image Image processing is performed on the data to generate the target illumination image data, and the brightness value of the original illumination image data is increased as the target brightness image data. If the original image data is the superposition between the original illumination image data and the reflection image data, the target illumination image Data and reflection image data are synthesized into characteristic image data, target brightness image data and characteristic chromaticity image data are synthesized into target image data, combined with target illumination image data under the Retinex model, under the condition of ensuring the true color, low brightness The original image data is slightly brightened to improve the image quality, making it possible to achieve dark light enhancement in devices with limited performance such as mobile terminals.
Description
A dark light enhancement method, device, mobile terminal and storage medium technical field Embodiments of the present invention relate to the technical field of computer vision, in particular to a dark light enhancement method, device, mobile mobile terminal and storage medium. Background technique [0002] With the rapid development of the mobile Internet and mobile terminals, mobile terminals are usually real-time when performing business operations. Collect video data, such as live broadcasts, video calls, video conferences, etc., which contain a lot of information about objects One of the sources of raw information from the outside world. [0003] The mobile terminal collects video data in a dark environment, and the video data can produce noise, low picture brightness, etc. As a result, the quality of the video data is generally low, and the user's subjective evaluation of the quality of the video data decreases. Therefore, in dark In a light environment, dark...
Claims
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