14 results about "Halo effect" patented technology

The invention belongs to the technical field of semiconductor display, particularly relates to a backlight and display drive cooperative control LED module system, and aims to solve the problems of brightness distortion, halo effect and energy efficiency degradation caused by disconnection of backlight and pixel control in high dynamic range display. The system generates adaptive backlight distribution through image semantic analysis and illumination field reconstruction, and realizes stable light output in combination with dynamic cutting compensation and temperature feedback; and the display driving end performs gray scale feedforward correction according to the backlight state, and introduces a cross-domain error back propagation mechanism to realize frame-level online calibration. And the dynamic response and the processing real-time performance are further optimized through motion vector sensing and double-phase time sequence scheduling. According to the system, the contrast ratio is increased to more than 100000: 1, the halo radius is reduced to 40% of that of a traditional scheme, the power consumption is reduced by 18%, and the visual experience and the operation stability are remarkably improved.

The application discloses a high-contrast MiniLED control method, system and medium, relates to the technical field of MiniLED display control, and ensures the uniform distribution of luminosity on the screen by subdividing luminosity data and adjusting the luminosity data on the adjacent boundary line; meanwhile, the precision adjustment of the luminosity color difference avoids unnatural color transition or obvious color difference problems; finally, the luminosity regulation model can realize more accurate luminosity coordinated transition, the display effect is more real and delicate, and a plurality of display scenes can be adapted; the whole realizes accurate control and optimization of the luminosity of the MiniLED backlight area; each link solves the problems of luminosity unevenness, color distortion and unnatural brightness transition that may occur in display in different dimensions, especially plays a key role in reducing the halo effect.

The invention discloses a method for adjusting ultra-high contrast accurate partition array backlight, and relates to the field of liquid crystal display backlight control. The method comprises the following steps: firstly, generating initial target brightness of a backlight partition based on image content statistics, and calculating a simulated receiving light field containing neighborhood crosstalk by using a pre-constructed optical diffusion weight matrix; on the basis of the deviation between the simulated light field and the target brightness, calculating a correction gain coefficient by using a nonlinear formula containing a halo suppression factor, and adaptively adjusting the suppression intensity in combination with a boundary brightness gradient; and generating a driving signal through time domain smoothing and nonlinear mapping, and reversely compensating the liquid crystal transmittance. Through accurate light field simulation and nonlinear correction, the problems of halo effect and brightness distortion generally existing in the traditional partition backlight technology are effectively solved, and the contrast ratio and uniformity of a display picture are remarkably improved.

The invention provides an automatic face feature recognition system and method based on image processing, relates to the technical field of face recognition, and aims to guide multi-scale feature fusion and illumination decomposition by using a thermodynamic diagram generated by face structure information, effectively enhance feature expression of key areas of five sense organs, suppress background interference and improve recognition efficiency. An improved Retinex algorithm is combined with a thermodynamic diagram to realize adaptive illumination component estimation, the halo effect of a traditional method in an edge region is overcome, illumination invariance of reflection component features is ensured, and the illumination invariance of the reflection component features is ensured by generating an accurate shielding mask from a reflection component diagram and extracting local discriminative features from an unshielded region. The method can effectively cope with challenges brought by shelters, finally, weighted fusion of global reflection component features and local discriminative features is combined with principal component dimensionality reduction and nearest neighbor classification, a recognition process with clear hierarchy and cooperative work is formed, and reliable identity recognition under double difficulties of illumination variation and local sheltering is realized.

The application provides a kind of face feature automatic identification system and method based on image processing, it is related to face recognition technical field, the present application is generated by using face structure information and is guided multi-scale feature fusion and illumination decomposition by heat map, effectively enhance the feature expression of key area of five organs, while inhibiting background interference, improved Retinex algorithm combines heat map and realizes adaptive illumination component estimation, overcome the halo effect of traditional method in edge area, ensure the illumination invariance of reflection component feature, by generating accurate occlusion mask from reflection component map, and extracting local discriminative feature to unoccluded area, it can effectively deal with the challenge brought by occlusion, finally, the weighted fusion of global reflection component feature and local discriminative feature, combined with principal component dimension reduction and nearest neighbor classification, constitute clear, collaborative work identification process, realize reliable identity recognition under the double difficulty of illumination change and local occlusion.

The invention discloses a halo rendering method, device and equipment, a medium and a product. The method comprises the following steps: displaying a light source element and at least one target element in a display interface; the target element is rendered with a halo effect; the halo effect is determined based on the light emitting effect of the light source element and the distance between the target element and the light source element; and adjusting the halo effect of the target element in response to the light-emitting effect change of the light source element. When the light-emitting effect of the light source element in the display interface changes, the halo effect generated on the target element is correspondingly adjusted according to the change condition of the light-emitting effect. The dynamic halo effect is added to the target element in the display interface, the display interestingness is increased, and the display effect of the interface is optimized.

A method is provided for use in reducing a size of halo effect in an ophthalmic lens. The method comprises: providing data indicative of a given ophthalmic lens with a first pattern providing prescribed vision improvement, processing said data indicative of the features of the first pattern and generating data indicative of a variation of at least one feature of the first pattern resulting in a second pattern which maintains said prescribed vision improvement and reduces a size of halo effect as compared to that of the lens with the first pattern.

Embodiments of the invention provide a halo effect generation method and device, and a storage medium. The method comprises the steps of obtaining target halo effect intensity of an original image; determining a target parameter of fuzzy processing according to the target halo effect intensity and a preset mapping relation; performing first-time fuzzy processing on the original image by adopting a first target parameter, and overlapping the image after the first-time fuzzy processing with the original image to obtain a first overlapped image; and performing second-time fuzzy processing on the first superimposed image by adopting a second target parameter, superimposing the image subjected to the second-time fuzzy processing with the original image to obtain a second superimposed image, and obtaining a target image meeting the target halo effect strength according to the second superimposed image. According to the embodiment of the invention, the target halo effect intensity is achieved through multiple times of fuzzy processing and superposition processing, and the calculation cost of each time of fuzzy processing is reduced, so that the calculation cost of the halo effect generation process is reduced, the requirement on equipment is reduced, and the method can be suitable for a scene with relatively high target halo effect intensity.

The invention discloses a wave optics-based supercontinuum laser atmospheric transmission thermal halo effect numerical simulation method, relates to the technical field of free space transmission of high-power supercontinuum laser and high-power wide-spectrum laser, and aims to generate a supercontinuum laser comprehensive thermal halo phase screen based on a line-by-line accumulation method of an energy accumulation thermal effect. And far-field light intensity distribution is obtained by solving the paraxial wave equation and the radiation transfer equation, and numerical simulation of the super-continuum spectrum laser atmospheric transfer thermal halo effect is achieved.

The application provides an underwater light halo image correction method based on radial gradient distribution characteristics, which comprises the following steps: constructing an imaging model of an underwater light halo image; solving the imaging model by using a Bayesian framework, introducing radial gradient distribution and hyper-Laplacian distribution to constrain the optimization process, and obtaining a target equation by using maximum posterior probability in combination with probability distribution of different image layers; then, using an alternating iterative updating method to decompose the target function into a plurality of sub-problems for solving; and performing brightness adjustment, color correction, contrast enhancement and other post-processing on the estimated reflection layer by using an adaptive brightness scaling factor and a multi-scale gradient domain contrast stretching to obtain a final clear underwater image after light halo correction. The application firstly considers a real complex light scene during underwater operation of a UUV, can effectively remove the light halo effect caused by an artificial strong light source, reduces serious interference caused by the light halo effect on subsequent computer vision tasks, and significantly improves underwater image quality.

This invention discloses a method, apparatus, and device for generating halo effects on a mobile device, comprising: acquiring an original image and extracting highlight regions from the original image to obtain highlight image attachments; performing inverse tone mapping on the highlight image attachments to obtain high dynamic range (HDR) brightened image attachments; performing multiple downsampling on the brightened image attachments to generate multiple downsampled image attachments with different resolutions; performing blurring processing on the brightened image attachments and each downsampled image attachment to obtain corresponding multiple blurred image attachments; upsampling and superimposing each blurred image attachment to generate a HDR halo composite attachment; performing tone mapping processing on the halo composite attachment to obtain a standard dynamic range (SDR) standard halo attachment; and superimposing the standard halo attachment with the original image based on the highlight image attachment to obtain the halo result image. This method can balance the visual realism of the halo effect with real-time processing performance under limited computing power.

The invention relates to a backlight display lens structure of a display screen. The problems that an existing display screen is insufficient in brightness and prone to halo are solved. Comprising a lamp panel assembly, lenses and a display screen, the lamp panel assembly comprises a PCB and more than one LED lamp, the lenses comprise a first lens and a second lens, the first lens is provided with a first lens bottom plate and more than one arc-shaped convex lens, the second lens is provided with a rectangular box dam corresponding to each convex lens, and the first lens bottom plate and the second lens bottom plate are arranged on the display screen. And a prism lens is arranged at the top of the rectangular box dam. The arc-shaped convex lens of the first lens gathers LED divergent light rays together, light loss is reduced, the light utilization rate is improved, and the brightness is improved. The rectangular box dam of the second lens enables the light to be converted from a round shape to a square shape to form a partitioned light source. The prism lens enables the light rays to be further changed into collimated light rays, interference on adjacent subareas is reduced, the halo influence is reduced, all the subareas emit light uniformly, and the halo problem of the display screen under the high-brightness and high-contrast condition is solved.

The application discloses an image defogging method, system and device, which extracts the luminance component of a to-be-processed image and performs binarization to obtain a connected component set of a first image, and then determines a sky region and a non-sky region; the sky region proportion is calculated, and when the sky region proportion is less than a preset value, a normalized dark channel model is used to uniformly calculate the transmittance of the sky region and the non-sky region; when the sky region proportion is greater than or equal to the preset value, a normalized luminance model is used to calculate the transmittance of the sky region, and the normalized dark channel model is used to calculate the transmittance of the non-sky region; finally, an atmospheric scattering model is used to complete the defogging processing of the to-be-processed image. Compared with a traditional dark channel prior defogging algorithm, the application solves the problems of color deviation and distortion in the sky region and halo effect in the depth-of-field mutation region, improves the defogging effect of the image while keeping the calculation complexity unchanged, and enhances the anti-interference capability of the image.

The invention relates to a rendering method and device for a virtual scene, a storage medium and a program product, and relates to the technical field of computer graphics. The method comprises the following steps: acquiring first coordinates of a plurality of position points around a central point of a light source in a virtual scene; acquiring second coordinates of the plurality of position points and first depths of the plurality of position points according to the first coordinates of the plurality of position points; the second coordinate is the coordinate of the position point in the screen UV space; acquiring a second depth at a second coordinate corresponding to the plurality of position points in the screen depth texture; and under the condition that the first depths of the plurality of position points and the second depths of the plurality of position points meet a specified relation, rendering of the halo effect of the light source is eliminated. According to the scheme, the rendering efficiency of the virtual scene with the light source can be effectively improved.