35results about How to "Avoid halo phenomenon" patented technology

The invention discloses an image enhancement method on the basis of an improved multi-scale Retinex theory. The method comprises the following steps of: carrying out nonlinear adjustment on the details of dark areas and the brightness of highlighted areas by virtue of a global brightness adjustment function; enhancing an image by virtue of a canonical gain compensation multi-scale Retinex algorithm; and according to the mean brightness value of a selected area, calculating the parameters of an S curve, adaptively adjusting the S curve, and carrying out the procedures of nonlinear mapping and the like on the enhanced image, thus finishing the enhancement on the image. The method disclosed by the invention solves the problems that when the conventional multi-scale Retinex theory method is used, a halo phenomenon is caused, the overall brightness of an enhanced high dynamic range image is insufficient, and the contrast ratio of the image is low. According to the invention, the S curve is self-adaptively adjusted according to the brightness of the central area of the image, and then the nonlinear mapping is performed on the image, so that the gradation of the image is stretched, and the contrast ratio of the image is improved; and the robustness of the algorithm on a complex night vision image is improved.

The invention discloses an image defogging method based on dark channel information, belonging to the technical field of image treatment and computer vision. The method disclosed by the invention comprises the following steps of: calculating the minimum value of each pixel of each color channel of an input image via a minimum value filter; then calculating dark channel counting values of the image under different scale parameters and carrying out Gaussian smoothing filter on the dark channel counting value corresponding to each scale parameter; distributing different weight values to the filtered dark channel counting values according to different scale parameters; and carrying out weighted optimization on the dark channel counting values and calculating a transmission coefficient of the scene so that the defogging of the image is realized. The application of the invention can avoid complex soft matting optimization steps and computing complexity of the defogging; the image with high quality can be obtained after the defogging; and the requirement on real-time treatment application can be met.

The embodiment of the invention discloses a double-layer liquid crystal screen, a backlight brightness control method and device and an electronic device. The method comprises: each frame of to-be-displayed image is divided into a set number of pixel blocks based on preset partitions; an average brightness value of each pixel block is calculated; according to the average brightness value, brightness control signals of backlight control partitions matching all corresponding pixel blocks are generated; and on the basis of the brightness control signals, an array substrate in a liquid crystal screen is controlled based on the brightness to control the backlight brightness of all corresponding pixel blocks. With the backlight brightness control method, the contrast of the to-be-displayed imageis improved and thus the transition between the bright picture and the dark picture of the image becomes natural, so that halo phenomenon is avoided.

The invention discloses an image processing method and electronic equipment. The method comprises that an HDR (High-Dynamic Range) image is obtained; a brightness parameter including a brightness-darkness proportion parameter and a brightness difference parameter in the HDR image is obtained; on the basis of the brightness parameter, a DR (Dynamic Range) factor and a DR central point are obtained; a target curve corresponding to the DR factor and central point is determined; and the target curve is utilized to establish a tone mapping relation between a picture frame in the HDR image and a display pixel of digital display equipment. A global tone mapping realization scheme is used for the HDR image, and compared with a local tone mapping scheme in the prior art, an unnatural halation phenomenon in a local position in the image is avoided.

The invention provides a dark channel prior and edge information-based image defogging method, and belongs to the technical field of image defogging methods. The method mainly comprises the following steps of: (1) estimating a value of atmospheric light by adoption of a block-based technology; (2) carrying out edge detection and expansive operation on a fog-degraded image, and extracting edge information of an original foggy image; (3) self-adaptively selecting a window size according to an obtained edge information graph so as to obtain a rough transmissivity graph; (4) refining the transmissivity graph by adoption of a rapid gradient domain steerable filter method, and importing a tolerance coefficient and a correction factor to correct the refined transmissivity graph; and (5) substituting the value of the atmospheric light and the corrected transmissivity graph by utilizing a fog-degraded model, so as to obtain a fog-free image. According to the method provided by the invention, when the transmissivity graph is solved, the edge information of the image is combined to self-adaptively select the window size, so that the halo phenomenon at the edge area can be effectively solved.

An embodiment of the invention discloses a display panel and a display device. The display panel comprises a liquid crystal light control panel and a liquid crystal display panel which are arranged ina laminated mode in the light emitting direction, wherein the liquid crystal light control panel comprises a plurality of light control sub-pixels, and each light control sub-pixel has a first opening area; the liquid crystal display panel comprises a plurality of display sub-pixels, and each display sub-pixel has a second opening area; the first opening area is smaller than the second opening area. By the adoption of the display panel and the display device, the display panel comprises the liquid crystal display panel and the liquid crystal light control panel, light emitted by a backlight source is adjusted through the liquid crystal light control panel, local backlight adjustment of the pixel level is achieved, and the display contrast of the liquid crystal display panel is improved; furthermore, the opening area of the sub-pixels in the liquid crystal light control panel is smaller than that of the sub-pixels in the liquid crystal display panel, so that the adjustment precision oflocal backlight is further improved, and the display contrast of the display panel is improved.

The invention relates to an image contrast adjustment method and an image contrast adjustment device, and belongs to the technical field of image processing. The method comprises the steps of determining a first expansion coefficient of the pixel value of each pixel and a first translation coefficient of the pixel value of each pixel, determining a first target pixel value of each pixel according to the pixel value of the pixel and the first expansion coefficient and the first translation coefficient of the pixel value of the pixel, and determining an image after contrast adjustment according to the first target pixel value of each pixel. The first target pixel value is determined for the pixel value of each pixel, which makes the processing result more accurate. The determined first target pixel value of each pixel and the pixel value of the pixel form a first linear relationship, and the difference between the first target pixel value of each pixel and the pixel value of the pixel is the minimum, so that the phenomenon that the first target pixel value of each pixel is relatively smooth is avoided, and the halo phenomenon is avoided.

The invention provides a method and a device for enhancing a low-illumination image. The method comprises the following steps of: calculating an enhancement gradient of at least one channel image of an original image; establishing an objective function for solving a luminance component and a reflection component with respect to at least one channel image; Solving an objective function of at leastone channel image to obtain a luminance component and a reflection component of the at least one channel image; Calculating at least one channel enhanced image based on a luminance component and a reflection component of the at least one channel image; synthesizing the enhanced images of each channel, or synthesizing the enhanced images of one channel with the original images of other channels toform the enhanced low-light images. Since the reflection component and the luminance component are not solved in the logarithmic domain in the objective function, the noise in the image is effectivelysuppressed, and a 1-norm constraint is performed when the gradient of the luminance component is constrained, so that the halo phenomenon in the image enhancement result can be effectively avoided.

The invention discloses a low-illumination color image enhancement method based on a local extreme value, and relates to the field of color image enhancement methods. The method comprises the steps ofstep 1, converting an original color image from an RGB space to a YUV space, and extracting an intensity channel Y of the YUV space as a grayscale image I; step 2, performing iterative filtering on the grayscale image I by using a local extreme value filter with gradually increased cores, and taking a filtering result as an illumination component L of the image; step 3, separating a reflection component R from the grayscale image I according to the illumination component L; step 4, carrying out gamma transformation on the contrast component L, and reconstructing the contrast component L and the reflection component R to obtain an enhanced image. The grayscale image is iteratively filtered by using the local extreme value filter with gradually increased cores, so that the problems of high-brightness region detail loss and low-brightness region contrast enhancement of the enhanced image caused by the existing method are solved, and the color fidelity of the enhanced image, the definition of dark region details and the detail information richness are improved.

The invention discloses a warehouse logistics management method and system. The management method comprises the steps of 1, designing an air route of an unmanned aerial vehicle according to a storagerange and aerial photography parameters; 2, enabling the unmanned aerial vehicle to perform aerial image acquisition according to the air route; 3, preprocessing the acquired image; 4, generating a three-dimensional model according to the preprocessed image; 5, generating DEM data and DOM data according to the three-dimensional model; 6, through data fusion of the three-dimensional model, the DEMdata and the DOM data, a live-action three-dimensional map of the storage area is formed; and 7, performing visual management on the warehouse logistics through the live-action three-dimensional map.The method is simple in step, reasonable in design, convenient to implement and capable of being effectively applied to warehouse logistics management, visual management and dynamic management are achieved in combination with a management system, the management efficiency is improved, the effect is remarkable, and popularization is facilitated.

This invention relates to a method for measuring photoelectric charges of a light sensing diode in controllable active pixels and a sensing device, in which, the method includes: providing a reference voltage greater than the earth potential to the grid of a converted transistor when a light sensing diode is exposed and one end of which contacts to the earth to control the photoelectric charges stored by light sensing diode, which advoides image resort and halation.

The invention provides a backlight module and an electronic device. The backlight module comprises: a substrate, a plurality of light sources and a plurality of light blocking structures. The plurality of light sources are arranged on one side of the substrate, the light blocking structure is arranged between at least two of the light sources, and a light emitting material layer is arranged on oneside of the light blocking structure away from the substrate. Therefore, in the scheme, by setting the light blocking structures among the plurality of light sources, the light of the light sources is blocked by the light blocking structures, thereby reducing the overlapping of the light between the adjacent light sources and avoiding the halo phenomenon from the root source. Moreover, in the backlight module provided by the invention, the light emitting material layer is arranged on one side of the light blocking structure away from the substrate, and the light emitting material layer can passively emit light when the light sources emit light, thereby reducing the occurrence possibility of a grid pattern phenomenon in a corresponding area of the light blocking structure in a light emitting process of the backlight module, and further improving the display effect of a display device.

The invention provides an image restoration method and device based on visual selection fusion, equipment and a medium. The method comprises the steps: obtaining the threshold feature information of sky region segmentation of a foggy image through a statistical model, and carrying out the segmentation of a sky region of the image according to the threshold feature information, and obtaining the effective range of a global atmospheric background light value; obtaining an initial transmissivity image of the foggy day image, and optimizing the transmissivity image by using an adaptive boundary limitation L0 gradient minimization filtering method; within the effective range of the global atmospheric background light value, inputting the optimized transmissivity image into a dark primary colortheoretical model to obtain a plurality of restored initial defogged images; and constructing a method based on visual selection to select a defogged image suitable for participating in fusion from each initial defogged image, and fusing the selected defogged images by using an image fusion method based on a YCbCr color space to obtain a final fog-free image. Through the technical scheme of the invention, the restoration quality of the foggy image can be stabilized.

The invention discloses a power transmission line monitoring image defogging method based on Retinex, and mainly solves the problem that an existing image defogging method cannot effectively improve the quality of a power transmission line monitoring image in foggy days. According to the implementation scheme, the method comprises the following steps: acquiring a foggy day power transmission linemonitoring image, and splitting the image into RGB channel images; performing multi-scale guided filtering on the RGB channel image, and estimating an illumination component; performing weighting to remove the illumination component of the RGB channel image to obtain a restored image; performing histogram equalization on the restored image to obtain an enhanced image; calculating a fusion coefficient, and fusing the restored image and the enhanced image to obtain a fused image; and combining the fused images of the RGB channels to obtain a final defogged image. According to the invention, defogging processing is carried out on the monitored image of the power transmission line through an image processing technology, a defogging processing result with relatively high quality can be obtained, the contrast is high, details are prominent, the method is suitable for human eyes to watch, the practicability is high, and the method can be used for defogging enhancement of the monitored image under various backgrounds of the power transmission line.

The invention relates to a light emitting module and a light emitting keyboard. The light emitting module comprises a circuit board, a light emitting unit, a transparent glue layer, a light guide plate, and a reflective layer. The light emitting unit is arranged on the circuit board, and has a light-out surface used to emit light. The transparent glue layer has a first gluing part and a second gluing part, the first gluing part has a first side and a second side which face each other, the second gluing part has a third side and a fourth side which face each other, the first side of the first gluing part is arranged on the circuit board, and the third side of the second gluing part is adhered to the light-out surface of the light emitting unit. The light guide plate has a light-in surface used to receive light transmitted via the second gluing part. The light-in surface faces the light-out surface of the light emitting unit, and the light-in surface of the light guide plate is adhered to the fourth side of the second gluing part. The reflective layer is arranged under the light guide plate, and the bottom side of the reflective layer is adhered to the second side of the first gluing part. The light-in surface of the light guide plate and the light-out surface of the light emitting unit are connected by the second gluing part, and therefore, the phenomenon of halo can be avoided.