287results about How to "Solve the problem of color cast" patented technology

The invention relates to the digital image processing field and particularly relates to a white balance and dark primary color adaptive histogram underwater image enhancement method. The method comprises steps that step 1, color correction for an image is carried out through utilizing a dynamic threshold white balance algorithm; step 2, a dark channel map of the image after color correction is solved through utilizing a dark channel model; step 3, a weight factor of block images is calculated; step 4, underwater image processing is carried out through utilizing a CLAHE method; step 5,the weight factor and gray mapping relationship tables are utilized to acquire a final gray mapping relationship table of a block through fusion calculation; and step 6, a bilinear interpolation algorithm is utilized to calculate a gray mapping value corresponding to each pixel in block images one by one, enhanced block images are acquired, interpolation calculation for pixels connected between the adjacent block images is carried out, and images of underwater images after enhancement are acquired. The method has advantages of simple calculation and strong timeliness.

The invention discloses an underwater color image enhancement method integrating dark primary and white balance and belongs to the technical field of image processing. In an underwater environment, scatter and attenuation of light result in low contrast of an underwater color image, color distortion, and serious image quality reduction; an underwater optical imaging model is established; underwater transmissivity and atmosphere light components are estimated according to a dark primary prior rule, the underwater color image is restored and sharpened; and the restored image is subjected to color correction according to a white balance theory, and the underwater color image is enhanced. The underwater color image enhancement method can better enhance image details according to imaging characteristics of the underwater color image; colors are rich, and the method has higher operational speed.

The invention belongs to the technical field of electronic surveillance, and relates to a surveillance camera filtering system and method. According to the system and the method disclosed by the invention, a light filter is switched into an infrared light filter in the daytime, and infrared light can be filtered so as to solve the color cast problem caused by the infrared light in the day time; at night, since visible light brings severe interference to a driver at night, a visible light white-light lamp is forbidden to use for snapshotting, the light filter is switched into an all-pass light filter to allow as much light as possible to enter the surveillance camera; meanwhile, the white-light lamp which emits infrared light and ultraviolet light is used, clearer images can be snapshotted since the infrared light and the ultraviolet light have an obvious light filling effect under a condition of dark light at night, and a license number or specific surveillance characteristics can be better extracted.

The invention provides a curved-surface liquid crystal display panel. The curved-surface liquid crystal display panel comprises colorful film substrates, array substrates and a liquid crystal layer. Each colorful film substrate is provided with colorful film color resistors and a black matrix, and each array substrate is arranged to be opposite to the corresponding color film substrate and provided with a pixel electrode and a data line, wherein the pixel electrode has a first edge and a second edge, the edge length of the first edge is larger than the edge length of the second edge, and the curving direction of the curved-surface liquid crystal display panel is the same as the extending direction of the first edge. The liquid crystal layer is arranged between the color film substrates and the array substrates. The invention further provides a curved-surface liquid crystal display device. According to the curved-surface liquid crystal display panel and the curved-surface liquid crystal display device, as the bending direction of the curved-surface liquid crystal display panel and the extending direction of the long edges of the pixel electrodes keep coincident, the color cast is reduced.

The embodiment of the invention discloses a curved display panel and a manufacturing method thereof. The curved display panel includes at least two curved parts, wherein in the connected carved parts,the curvature radii of the curved parts are different. The curved display panel also includes a compensation micro lens layer positioned on a light emitting side of the curved display panel, whereinthe larger the curvature radius of each curved part is, the lower the light scattering degree of the portion, corresponding to the curved part, of the compensation micro lens layer is; the compensation micro lens layer includes multiple compensation micro lenses. Compared with existing curved display panels, the provided curved display panel includes the compensation micro lens layer; scattering is carried out on light through the compensation micro lens layer, the emitted light in different colors can be better scattered, the amount of light with color shift in an original color shift area isreduced, and therefore the color shift phenomenon of the curved display panel can be reduced so that the viewing angle deterioration phenomenon of the curved display panel can be alleviated.

The invention provides a pixel structure of a liquid crystal display panel. The pixel structure of a liquid crystal display panel comprises a first substrate, a first electrode, a dielectric layer, a second electrode, a second substrate, and a liquid crystal layer, wherein the first electrode is arranged on the first substrate, the dielectric layer is arranged on the first substrate and covers the first electrode, and the second electrode is arranged on the dielectric layer. The second electrode comprises at least a main trunk electrode, multiple branch electrodes which are connected with the main trunk electrode, and multiple narrow slits which are respectively formed between neighboring branch electrodes. The second substrate is arranged opposite to the first substrate, the liquid crystal layer is arranged between the second electrode and the second substrate, and the liquid crystal layer comprises multiple negative type vertically aligned liquid crystal molecules.

The embodiments of the invention provide a liquid crystal display device, and relates to the technical field of liquid crystal displays. According to the embodiments of the invention, a liquid crystal display device is dynamically controlled within a backlight sub-area controlled dynamically by the sub-area backlight. A plurality of excitation-point light sources serve as excitation light sources of a surface light source and the quantum dot material in a quantum dot packaging part along the light emergent direction of the above light sources is excited. Between the plurality of excitation-point light sources and the quantum dot packaging part, a light selection part is arranged to select the transmission of the excitation light sources sent from the light sources and reflect the excitation light generated through exciting the quantum dot material. In this way, the back light reflected back by the quantum dot packaging part can be reflected by the light selection part, so that the interference of the back light on a white light source in the adjacent area can be avoided. Therefore, the white light of the white light source in the backlight sub-area is formed through only mixing up the excitation light generated by the point light sources in the backlight sub-area with the motivated light of the above point light sources generated through exciting the excitation light of the point light sources.

The invention discloses a gamma voltage adjusting circuit and a display device; the gamma voltage adjusting circuit comprises the following parts: a gamma voltage input end and a gamma voltage outputend; a switch control circuit configured to form a first control signal or a second control signal according to a received sequential control signal; a gamma voltage output circuit configured to conduct when receiving a first switch signal, and to output a first gamma voltage inputted by the gamma voltage input end to the gamma voltage output end; a gamma voltage processing circuit configured to convert the first gamma voltage inputted by the gamma voltage input end into a second gamma voltage when receiving a second control signal, and to output the second gamma voltage to the gamma voltage output end. The gamma voltage adjusting circuit can improve the image quality of a display panel.

The invention provides a reflective polarizer sheet which comprises a cholesterol liquid crystal layer, a phase difference membrane with a 1/4 wave length and a bonding layer. The bonding layer is positioned between the cholesterol liquid crystal layer and the phase difference membrane with the 1/4 wave length; and a jointing agent and blue pigment are included in the bonding layer. The blue pigment is added in the bonding layer of the reflective polarizer sheet so as to compensate the color problem caused by the reflective polarizer sheet self and a large horizontal viewing angle. A micro bead can be added in the bonding layer of the reflective polarizer sheet or a condenser micro-structure is configured on the outer side of the phase difference membrane with the 1/4 wave length so as to further improve the color problem caused by the reflective polarizer sheet self and the large horizontal viewing angle.