34results about How to "Improve picture contrast" patented technology

A method for enhancing the contrast of video pictures that includes the steps of receiving an input video signal; extracting a picture from said input video signal; determining an active window for said picture; calculating a histogram for luminance values of pixels in said active window of said picture; determining characteristics of said histogram; selecting one suitable mapping function from a plurality of mapping functions based on the determined characteristics of said histogram; and mapping the luminance value of each pixel in said picture in accordance with said selected mapping function.

The invention discloses a holographic projection display system for scene representation, relating to the technical field of 3D display. The holographic projection display system comprises a three-dimensional display module, an auxiliary light source, a projection screen, a motion following drive module, a human eye recognition module and a processor, wherein the processor controls the three-dimensional display module to project a picture on a projection screen; the light of the auxiliary light source is projected to the projection screen for picture modulation to form a hologram, so that a 3D picture can be watched; the human eye recognition module is capable of positioning the position of human eyes, the processor controls the motion following drive module to act through analysis and processing of the processor, the motion following drive module is connected with the three-dimensional display module or the projection screen, and controls the three-dimensional display module and the projection screen to move, and the human eyes and the three-dimensional display module are in a mirror image position relative to the projection screen, so that the condition that a person can receive the clear 3D picture during movement is ensured. The overall projection system is simple in structure, small in occupied space and low in production cost, and meanwhile, the effect of watching the 3D image through naked eyes can be achieved.

Systems and methods are provided for improving the visual quality of low resolution and / or low frame rate video content displayed on large-screen displays. A video format converter may be used to process a low resolution and / or low frame rate video signal from a media providing device before the video is displayed. The video format converter may detect the true resolution of the video and deinterlace the video signal accordingly. The video format converter may also determine the frame rate of a video and may increase the frame rate if the received frame rate is below a certain threshold. For videos that are also low in quality, the video format converter may reduce compression artifacts and apply techniques to enhance the appearance of the video.

A plasma display panel comprises a front substrate and a rear substrate, a plurality of row electrode pairs provided on the inner surface of the front substrate, a dielectric layer provided on the inner surface of the front substrate for coverring the row electrode pairs, a plurality of column electrodes provided on the inner surface of the rear substrate, a partition wall assembly provided between the front substrate and the rear substrate, said partition wall assembly including a plurality of longitudinal partition walls and a plurality of lateral partition walls, forming a plurality of discharge cells. In particular, the dielectric layer has a plurality of projection portions located corresponding to and protruding toward the lateral partition walls of the partition wall assembly, in a manner such that there would be no slots formed between the dielectric layer and the lateral partition walls.

PURPOSE: A polarizing plate and a liquid crystal display device with high contrast are provided to improve contrast by applying a polarizer to a liquid crystal display having an emitting wavelength property. CONSTITUTION: A polarizer comprises a polarizing film. The polarizing film is formed by absorbing and growing a polyvinyl alcohol resin film with two color pigments. The cellulose acetate series region film is laminated on one side of the polarizing film through an adhesive film. A cycloolefin-based resin film is laminated on the other side of polarizing film through an adhesive film.

The invention provides a liquid crystal display device as well as a backlight module thereof and a display method. The backlight module at least includes a lighting component, a polarization component and a modulation component. The lighting component is used for providing a light source. A first polarized light is formed after the light source passes through the polarization component. The modulation component is provided with a plurality of modulation areas. Each modulation area corresponds to one modulation direction, and a plurality of second polarized lights are formed after the first polarized light passes through the modulation areas. The second polarized lights respectively correspond to the modulation directions, wherein the modulation directions are not identical.

The invention discloses a contact-type excitation light source used for a fluorescence imaging detecting system, belonging to an auxiliary device capable of enhancing the imaging effect of the fluorescence detection device. According to the design, the contact-type excitation light source is in direct contact with the skin or the surface of the body tissue, therefore, exciting light reflected by the skin and the surface of the other body tissue can be shielded by the device, while the fluorescence generated by the exciting light penetrating through the skin or the other body tissue which irradiates the IGG can penetrate through an observation channel in the center of the device and be received by the fluorescence detection device. With the adoption of the device, the useless exciting light reflected back to the fluorescence detection device by the skin or the surface of the body tissue is well blocked, therefore, the influences of the large amount of reflected exciting light on the picture are eliminated, the signal to noise ratio of the picture is improved, and the effect of the picture is enhanced. The contact-type excitation light source can be widely applied to the technical fields of sentinel node biopsy, heart bypass surgery, venous flap detection and the like.

The invention provides a projection imaging film for a glass curtain wall of a building. The projection imaging film comprises a base film layer, wherein a plurality of light transmitting elements are arrayed on the base film layer, a plurality of reflecting elements are further arrayed on the base film layer, and the light transmitting elements and the reflecting elements are mutually spaced. The plurality of light transmitting elements and the plurality of reflecting elements are arrayed on the base film layer and mutually spaced, and light transmitting elements can transmit light to keep the normal illumination intensity inside the building; and the reflecting elements can reflect the projection light, so that the projection quality of the glass curtain wall of the building is improved.