124results about How to "High color fidelity" patented technology

The present invention provides a color imaging system and a method to capture an accurate color image by use of a tunable filter tunable between two states and a color detector that records the light transmitted through the filter when the filter is in the first state and then in the second state.

An instrument and related process for measuring color, shade, gloss, shape and/or translucence of a tooth. First, the instrument uses searchlight illumination to illuminate a tooth with constant irradiance. Second, the instrument uses colorimetric imaging to collect time-separated frames of different wavelengths of light reflected from a tooth and to combine those frames into a color image. Third, the instrument includes a sanitary shield to establish a reference color and a predetermined distance to a target tooth. Fourth, the instrument provides line-of-sight viewing so an operator may simultaneously view a display of the image on the instrument and the object being measured. Fifth, the instrument is impervious to pollutants because it incorporates a sealed measurement window. Sixth, optical measurements of a tooth taken by a dentist are compared to optical measurements of a prosthetic restoration for that tooth to confirm satisfactory matching of optical characteristics of the tooth and restoration.

An automated method of improving digital color images at high speed, which supports pipe-lining and has very little memory requirements, and is therefore specially suitable for on-the-fly processing of real time video, as well as for processing of large batches of images without the need of human intervention. The method includes a novel dynamic range adaptation scheme that operates on the norm of the image, which is suitable as is for gray-scale images. For, color images, a simple color reconstruction stage is added that maintains optimal color fidelity.

The invention belongs to the technical field of image enhancement and in particular relates to a method, a device and a system for image enhancement based on a YCbCr color space. The method comprises the steps of extracting the luminance component Y in an original image according to the input original image, performing median filtering on the obtained luminance component Y and then performing normalization processing to obtain a normalized image Ym, calculating the average value avgYm of the normalized image according to Ym and judging the measure of the fog concentration of the original image according to the range of avgYm, performing MSR processing and DCP processing on the original image to obtain corresponding processed images Y1 and Y2, putting Y1 and Y2 into a formula X=aY1+bY2 to calculate an image X after fusion processing, and performing automatic contrast control optimization on the image X after the fusion processing to obtain an optimized image, wherein a and b in the formula are fusion coefficients. The method for the image enhancement based on the YCbCr color space is capable of effectively eliminating the halo and over-enhancement phenomena, and therefore, the stability and quality of the output image can be improved.

A method for enhancing color fidelity in multi-reproduction, includes scanning an image to be reproduced, wherein the image contains an invisible digital watermark including color information; decoding the color information contained in the watermark; comparing the decoded color information with the scanned image; generating a correction table from the differences between the decoded color information and the scanned image; and performing color correction on the scanned image using the correction table. This method confines the color error to one generation, even when copies go through multiple reproduction.

A method for calibrating multi-section Gamma curve includes dividing Gamma curve to be three parts of dark grey level part and intermediate part as well as bright grey level part according to different scope of grey level value, setting coefficient of Gamma curve at dark grey level part to be 2.0-2.4 and coefficient of Gamma curve at bright grey level part to be 1.5-1.9, smoothly transiting dark grey level part to be bright grey level part in linear way.

The invention discloses an enhanced display method for color high dynamic range image. The enhanced display method for color high dynamic range image comprises the following steps: executing the nonlinearity correction for the RGB image, building the color image brightness model and extracting the brightness information, building color image chroma model and extracting the chroma information, executing the Retinex filtering operation to the brightness, combining the new brightness with the chroma information and reducing into the RGB image. The method selects the suitable brightness and color model for improving the gray level distribution of the result image and effectively reducing the color distortion problem in the result image, the information included in the high dynamic range image is well recovered by the Retinex filtering operation. The enhanced display method for color high dynamic range image is used for the image enhanced processing unit of the digital camera with HDR function, field surveillance camera and other image collecting device and for the transform processing process for displaying high dynamic range image on the low dynamic range device. The brightness and chroma model of the method is simple and practical, the image is displayed in enhanced mode and the color is kept without distortion.

The present invention relates to fabric care methods for restoring and/or rejuvenating color of worn, faded fabric, by applying to said fabric a fabric color care composition which comprises: water soluble and/or water dispersible polymers; surfactant capable of forming a bilayer structure; and mixtures thereof. Optionally, the composition can contain other ingredients to provide additionally fabric care benefits, and/or to improve performance and formulatability. The composition is preferably applied as small particle size droplets, especially from spray container that preferably are in association with a set of instructions for use.

The invention discloses a TFT-LCD panel, a color film substrate and a manufacturing method thereof, and the color film substrate comprises a transparent substrate and R, B and B resins, and the thicknesses of the R, the G and the B resins are sequentially gradually increased. By regulating the thicknesses of the R, the G and the B resins, the thickness of a liquid crystal layer in R, G and B pigments is changed, thereby leading the transmittances of the R, the G and the B pigments to be as close as possible; when a liquid crystal is driven by driving voltage preset in a program, the color which is closest to the theoretical gray value through the R, the G and the B pigments can be obtained, the degree of realism of the color can be improved, and the image quality of a liquid crystal display device can be improved.

A four-color ink set capable of printing an expanded color gamut has a cyan ink that prints on a reference substrate with CIELAB colorimetric aim values of L*=54, a*=−41, and b*=−45, within a ΔE*_ab≦8; a magenta ink that prints on the reference substrate with CIELAB colorimetric aim values of L*=52, a*=79, and b*=−9, within a ΔE*_ab≦8; a yellow ink that prints on the reference substrate with CIELAB colorimetric aim values of L*=90, a*=−7, and b*=102, within a ΔE*_ab≦10; and a black ink. Obtaining a profile for the expanded gamut ink set, for example an International Color Consortium (ICC) profile, that relates tone values for the ink set to colorimetric values for the printed ink allows the printer to obtain the maximum benefit of the expanded color gamut. The profile for the ink set is applied in a color separation process prior to printing the image on press.

The invention discloses a degraded image restoration method which comprises the steps of: obtaining a degraded image; establishing a mathematical model of the degraded image with respect to an atmosphere covering layer; obtaining an estimation matrix of the atmosphere covering layer for the degraded image by using singular value decomposition according to the mathematical model; calculating the atmosphere covering layer according to the estimation matrix; selecting an atmosphere optical matrix, operating to obtain a transmission coefficient matrix of the atmosphere covering layer; and solving a restored image according to the atmosphere covering layer and the transmission coefficient matrix. The mathematical model established in the degraded image restoration method includes a variable of the atmosphere covering layer, more accurate atmosphere covering layer and transmission coefficient are obtained through optimization calculation, and the restored image can have higher contrast. Whitening balance, tone mapping and gamma correction technologies are not used, but the degraded image restoration method has better local detail restoration effect on the degraded image, and better color fidelity and definition of a processing result. The invention also provides a degraded image restoration system.

The invention discloses an image demisting method based on sky segmentation and transmissivity adaptive correction, an iterative threshold segmentation algorithm is used to divide the fogged image into sky region and non-sky region, and the brightness of the segmented sky region is adjusted. A dark channel prior algorithm based on fast bilateral filtering and cubic logarithmic polynomial correctedtransmittance is used to de-fogging the non-sky region. At the same time, the average value of high luminance pixel set in dark channel image is used to ensure that the estimation result of atmospheric light value tends to reasonable value as far as possible. The output image is further enhanced by fast bilateral filter and cubic logarithmic polynomial transform of transmittance, so as to achievethe purpose of denoising, preserving edge and eliminating the edge halo of the scene. The experiment results show that the invention has the advantages of good demisting effect, high color fidelity of the sky region and strong edge retention ability.

The present invention relates to an electro-optical light-modulation element of the FFS type, and to electro-optical displays and display systems, such as, for example, television screens and computer monitors, which contain elements of this type. The light-modulation elements according to the invention contain a liquid-crystalline modulation medium which has optimised elastic constants and are distinguished, in particular, by high contrast and/or optimised transmission in addition to good contrast, a low viewing-angle dependence, short response times and low addressing voltages. The present invention likewise relates to the liquid-crystalline modulation media used in the electro-optical light-modulation elements.

The invention relates to a heating device (1) for heating a glass surface (2) by means of at least one heating element, which has been applied to the glass surface (2) as a material layer (1.1). Due to such direct heating of the glass surface (2), such as of a protective glass, in that the material layer (1.1) applied in a positive, bonded and non-positive manner, the energy input necessary for heating is low, and the heating is carried out in a uniform manner free of interferences.

A method for calibration of digital image capture devices is presented. This simplified method provides a calibration based on the human visual perception of the colors input into the device using simple test targets, measurement devices, and software with a minimum of labor and expertise. This analysis may be performed using the data analysis tools of a conventional electronic spreadsheet. The method normalizes the test target data to both black and white, and converts the normalized data into the color space of the capture device through white point adaptation. The raw captured image data is also normalized to both black and white, and is regressed with the converted, normalized target data to determine the expected measurement values. These values are used to compensate the device output to achieve a high level of color fidelity. To ensure that the level of fidelity is acceptable, the CIE color difference equations are used.

The invention provides a visual rivalry improving method of a complementary color three-dimensional image for improving color fidelity. The method comprises the steps of transforming symmetrical left view and right view of a three-dimensional image from an RGB color space to a CIE L*a*b* color space; then calculating the sensing area of a cyan lens in the CIE L*a*b* color space; matching and mapping the right view to the two-dimensional sensing area of the cyan lens, and calculating corresponding a* and b* values of each pixel in the matched and mapped right view; adjusting the brightness of the left view and the right view based on a chromatic value, and separately calculating a corresponding L* value of each pixel in the adjusted left view and right view; inversely transforming the processed left view and right view from the CIE L*a*b* color space to the RGB color space to synthesize a red and cyan complementary color three-dimensional image. The method can improve the color fidelity of the complementary color three-dimensional image on the premise of effectively reducing the visual fatigue in view of the three-dimensional image and obtaining more comfortable three-dimensional visual experience.