127 results about "Color vision" patented technology

A corneal inlay protects ocular structures from harmful wavelengths of light while maintaining acceptable color cosmetics, color perception, overall light transmission, photopic vision, scotopic vision, color vision, and/or cirdadian rhythms. The corneal inlay can also include a pinhole effect to increase depth of focus. In some embodiments, the corneal inlay can also correct refractive errors including, but not limited to, higher order aberration, lower order aberration, myopia, hyperopia, astigmatism, and/or presbyopia.

Disclosed embodiments relate to techniques for color gamut mapping when an input signal transmitting color visual images has a different color gamut than does the output display device. Polynomial rubber-sheet mapping may be used to translate the input color gamut to the output color gamut on a hue-by-hue basis within a three-dimensional perceptual color space. Also, a memory color look-up table may be used to preserve memory colors in the input gamut which are capable of reproduction within the output gamut. By using such techniques alone or in combination, it may be possible to more effectively map an input color gamut to a different output color gamut with improved calorimetric accuracy.

A method of identifying at least one color for a user, for example, a color-vision impaired observer, includes allowing the user to capture an image with a camera; displaying the captured image on a display screen; identifying a set of at least one color parameter associated with the selected position or region, in response to the user selecting a position or region in the displayed image; mapping the set of at least one color parameter to one or more reference colors; and identifying the one or more reference colors for the user, in a form perceptible to the user.

Disclosed is a color night vision system including a single-4-color image sensor configured to acquire a red, green, blue (RGB) image and an infrared (IR) image by processing RGB light signals and an IR light signal for each wavelength; and a processor configured to determine an exposure state of the RGB image by analyzing a brightness distribution of the RGB image, to decide at least one of an exposure compensation level of the RGB image, a denoising level of the RGB image, or a synthesis ratio between the RGB image and the IR image based on the determination result, and to create an output image based on the decision result that is made using the RGB image and the IR image.

The invention relates to a method for display equipment with narrow dynamic range to reproduce an image with wide dynamic range. The dynamic range of the image can be compacted by simulating the process of color vision processing information of human eyes and the texture details and colors of scenes in the images with wide dynamic range can be correctly reproduced on the display equipment with narrow dynamic range. The method comprises the following steps of: reading a real luminance value of each pixel RGB (Red, Green and Blue) channel in the image with wide dynamic range; converting the RGB into XYZ value; calculating the adaptation luminance of each pixel; carrying out the chromaticity adaptation adjustment of a light source under each adaptation luminance; simulating a photo-induction cell response mechanism and calculating the relative response value under each adaptation luminance; and converting to an orthogonal opposite space by using PCA (Principal Component Analysis) and simulating an edge phase resistance mechanism of a center-peripheral perceptive cell structure for further processing. The invention can be used for compressing the image with wider dynamic range at high efficiency so as to adapt to the display equipment with narrow dynamic range or paper.

Analysis data from the execution of a computer program is collected. The analysis data may include samples of two different types of performance data from the execution of the computer program. Performance data may include sampled hardware performance counter data and sampled executing functions. The performance data is used to create a composite view of the data. The composite view may allow a user to efficiently correlate the different types of performance data by using a colored visual display.

The invention relates to a method for designing color filters which improve or modify color vision of the human eye. According to the invention a desired opponent signal function to be attained is divided by a real opponent signal function characteristic of the eye color vision to be improved or modified, the negative range of the resulting function is replaced by zero, the whole function is normalized to give a spectral transmission function, and, if desired, one or more section(s) of this spectral transmission function is modified. The invention also relates to color filter means designed by the above method.

This invention is for directly modulating a beam of photons onto the retinas of patients who have extreme vision impairment or blindness. Its purpose is to supply enough imaging energy to retinal prosthetics implanted in the eye which operate essentially by having light (external to the eye) activating photoreceptors, or photo-electrical material. The invention provides sufficient light amplification and does it logarithmically. While it has sufficient output light power, the output light level still remains at a safe level. Most preferred embodiments of this invention provide balanced biphasic stimulation with no net charge injection into the eye. Both optical and electronic magnification for the image, as for example, using an optical zoom lens, is incorporated. Otherwise, it would not be feasible to zoom in on items of particular interest or necessity. Without proper adjustment, improper threshold amplitudes would obtain, as well as uncomfortable maximum thresholds. Therefore, to adjust for these, a way of proper adjustment for the threshold amplitudes and maximum comfortable thresholds is provided. Furthermore, to the extent that individual stimulation sites in the retina give different color perceptions, upon stimulation, then colors of the viewed scene is correlated with specific stimulation sites to provide a certain amount of color vision.

The invention relates to an LED (light emitting diode) illuminating source, in particular to a uniform illuminating source and design method based on a multiband LED array and a diffuse reflection surface. A uniform illuminating source is designed with indirect illumination by applying the LED annular array and the diffuse reflection surface. The multiband LED array is distributed cyclically, the light of the LED is illuminated directly on a semispherical inner surface of high diffuse reflection from an annular bottom surface, and then is reflected on a target surface uniformly, so that uniform illumination is realized. According to the lambertian property of the LED and bidirectional distribution function of the diffuse reflection surface, a mathematical model of uniform illumination source is established. The uniform illumination source designed according to the invention can be used for a color vision detecting system, projection system and the like which require the multiband illumination. The uniformity of the degree of illumination is improved greatly, and a favorable color mixing effect is provided.

The invention discloses a near infrared spectroscopy introduced tobacco foreign material removing device. A near infrared signal system is introduced on the conventional tobacco foreign material remover, and the absorbance of the material at three sections of different near infrared wavelengths is selected and brought into a R (red) G (green) B (blue) three-color vision detection system so as to improve the sensitivity of the vision detection system and identify the tobacco and the foreign material more accurately. A corresponding removing method comprises the following steps of: determining three sections of wavelength intervals with obvious near infrared absorption difference between the tobacco and the foreign material; and then determining the range of tobacco absorbance in each section of wavelength, wherein after the production process is started, the tobacco foreign material remover determines the foreign material only by judging whether the absorbance of the sampled material in the three sections of wavelength intervals exceeds the range and then gives corresponding jet valve instruction to remove the foreign material.

The invention provides a design method of a light-emitting diode (LED) even-illumination light source based on a high-diffuse-reflection-rate free-form surface. A general mathematical model of a free-form surface diffuse reflection surface for secondary light distribution is built by utilizing a bidirectional reflection distribution function (BRDF) of a high-diffuse-reflection-rate surface according to light-emitting characteristics of the LED light source. The mathematical model is utilized to write a nonlinear algebraic equation set by combining specific requirements for target illumination areas and the irradiance distribution in an actual application occasion, and a numerical method is utilized to conduct calculation to obtain a surface type outline of the diffuse free-form surface. The LED indirect light source based on the high-diffuse-reflection-rate free-form surface is compact in system structure, high in illumination evenness and capable of being used in the fields of color vision measurement, indoor illumination, projector devices and the like requiring high-evenness illumination conditions and has good application prospects.

A color vision characteristic detection apparatus has a storage section, a generation section, and a presenting section. The storage section stores a basic color chart containing portions colored in colors different from each other. The generation section performs a predetermined conversion processing with respect to the basic color chart to generate an adjusted color chart for one color vision characteristic type so that it is difficult for a person who has a visual characteristic of the one color vision characteristic type to distinguish the adjusted color chart from the basic color chart. The presenting section presents the basic color chart and the adjusted color chart to a user.

The invention discloses a colored night vision imaging device and method based on an EMCCD and a single-color CCD. The colored night vision imaging device is composed of the EMCCD, the single-color CCD, a focusing lens, a movement control platform, an electric light filter runner, a PC and a target image. The method includes: taking a standard color card as the target image; restoring an RGB-format image acquired by YUV conversion to be an image high in color fidelity through white balance, chroma control and color calibration to acquire a mapping color correction matrix; photographing a real object, and restoring a colored image under low illuminance according to the mapping color correction matrix. By the colored night vision imaging device and method, color information can be restored under low-illuminance environment without sacrificing reconstructed image resolution; photons of a near infrared wave band and a visible light wave band are utilized, so that the problem of high noise of the EMCCD under low illuminance is avoided as much as possible.

Method and apparatus utilizing the method for continuous correlation of sound to light and light to sound, and more particularly a method based on a universal equation such that it can be applied to all wavelengths of light and sound seamlessly without any intuition or subjective inputs. Within this method, the entire audible sound spectrum mutually correlates to the entire visible light spectrum. A light and sound correlation apparatus disclosed is an apparatus where the wavelength of light and/or sound is input and the correlating sound and/or light is output. This invention is revealed in a plurality of embodiments for human needs, such as providing an interactive color and sound correlation display apparatus and slide rule, a color MIDI file generating apparatus, a colorized visual orchestration apparatus, an art composer apparatus, spatial information apparatus with color and sound, and a color language apparatus.

An image enhancement method for improving color perception of colorblind viewers has an image input step, an image difference area analyzing step, an image color distribution adjusting step, and an image output step. In such method, a normal image and a colorblindness-simulative image are input and calculated to produce a colorblindness-optimized image. Color vision obtained by a colorblind person from the colorblindness-optimized image is substantially identical to that obtained by a person with normal color perception from the normal image.

To provide a functional spectral filter through which, it is possible for an observer wearing the functional spectral filter to change his or her color sensitivity (ease of color distinction), and which is for designing a color scheme easy to be distinguished for a color deficient observer by using the filter. A functional spectral filter including a multilayer is formed in accordance with a thin film design (an optimization method) determined by use of a color vision theory so as to make color sensitivity into a desired pattern. With respect to combinations that two colors among a plurality of specified colors are combined, color differences in the respective combinations are made close to a color difference given in advance. Alternatively, with respect to specified combinations, the color differences are made small or the color differences are made large.

A color night vision system based on infrared and low light level image fusion technology is disclosed. The invention relates to a color night vision system and particularly relates to the technology with the fusion of infrared and low light night vision image fusion imaging. At present, main night-vision equipment is divided into an infrared thermal imager and a low light night-vision instrument. However, the infrared thermal imager has the disadvantages of blurred outline of an infrared image, low resolution and poor sense of depth and does not meet a human eye visual characteristic, and the eye observation is not facilitated. The low light night-vision instrument is easily affected by the environment conditions of light, weather and the like, in the bad conditions of rain, rain and smoke, the image detail loss is serious. The invention provides a color night vision system which is not affected by weather, light and smoke and has the advantages of high resolution, good real-time performance, rich details, the accordance with human eye visual characteristic, and easy reading understanding by people. According to the system, an image pyramid method is used, the two paths of night vision images of infrared and low light in the same scene and same visual angle are fused, then a color rapid transfer algorithm is used, and the tone in a day natural scene is transferred to a fused night vision image.

Appliance comprising a housing, wherein a part of said housing is optically transmissive, said optically transmissive part having an exterior surface through which light travelling through the optically transparent part is transmitted, so as to cause the transmitted light to be visible upon viewing the exterior surface. The appliance further comprises a controllable light source assembly, capable of producing light in a variety of colors, and configured to couple produced light into the optically transmissive part of the housing. The appliance also includes a control unit, and a color vision system, configured to optically observe an environment of the appliance, and to output data relating to colors of the observed environment to the control unit. The control unit is configured to control a housing color to be produced by the light source assembly, whereby said housing color is determined in dependence of the data received from the color vision system.

A system for coding images, and more particularly, to a system for compressing images to a reduced number of bits by employing a Discrete Cosine Transform (DCT) in combination with a visual model.