A method and device for image enhancement
An image enhancement and image technology, applied in the field of image processing, can solve problems such as image mosaic or edge oscillation, avoid threshold dependence, improve denoising effect, and eliminate edge oscillation.
Active Publication Date: 2022-05-03
SHANGHAI LINKCHIP SEMICON TECH CO LTD
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, this method depends on the selection of the threshold. Since different decomposition scales and different high-frequency sub-bands require different thresholds, once the threshold is not selected properly, it is very easy to cause mosaic in the image after denoising due to the loss of a large number of high-frequency components. or fringe oscillations
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0035] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0036] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.
[0037] As indicated in this application and claims, the terms "a", "an", "an" and / or "the" do not refer to the singular and may include the plural unless the context clearly indicates an exception. Generally speaking, the terms "comprising" and "comprising" only suggest the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also contain other st...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides an image enhancement method, which includes: acquiring a YUV format image, separating the luminance component and chrominance component of the YUV format image; performing Nmax layer wavelet decomposition on the luminance component and chrominance component respectively to obtain each The low frequency subband and high frequency subband of the luminance component of the layer, and the low frequency subband and high frequency subband of the chrominance component, wherein Nmax is a positive integer greater than 1; starting with the Nmax layer, according to the corresponding layer luminance component The low-frequency sub-band performs edge-preserving filtering on the low-frequency sub-bands of the chrominance components of each layer, and performs wavelet reconstruction on the high-frequency sub-bands of the chrominance components until an image of the original size is obtained; according to the luminance component, the wavelet The reconstructed chroma component is subjected to edge-preserving filtering; the luma component and the chrominance component subjected to edge-preserving filtering are integrated.
Description
technical field [0001] The invention relates to the field of image processing, in particular to an image enhancement method and device. Background technique [0002] With the gradual popularization of mobile phones, people have higher and higher requirements for image quality. In order to meet people's needs, the resolution of cameras equipped with mobile phones is increasing year by year, but the image quality has not been greatly improved with the increase of resolution, especially in low-light environments. [0003] In order to increase the brightness, the camera needs to extend the exposure time or increase the signal magnification. Prolonging the exposure time will result in slower image formation, degrading the user experience. For increasing the signal amplification factor, while amplifying the normal signal, the noise (especially the chroma noise to which the human eye is more sensitive) will also be amplified, resulting in a decrease in image quality. [0004] Th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T5/002G06T2207/10024G06T2207/20064G06T2207/20192G06T2207/20028G06T5/10G06T7/13G06T7/90G06T5/20G06T7/60
Inventor 洪明张蕊林恒杰
Owner SHANGHAI LINKCHIP SEMICON TECH CO LTD