707 results about "Color chart" patented technology

An assortment of color elements is grouped within a plurality of color families which are organized in accordance with a circular color chart (FIG. 10-A) and a columnar chart (FIG. 11-A). Except for the neutral-gray color family, a pair of boundary-hues respectively defines the extent of acceptable hue variation within each group, resulting in an included range of hue within each color family, and an excluded range of hue in between neighboring color families. Variant-hue charts enhance color comparison and selection within each main color family by displaying contrasting variations of all three color attributes, that is, value, saturation, and hue, within a single chart. Variant-hue charts also consolidate color elements into a compact format, and provide a graphical user interface for computer color selection.

Color-based reaction testing of biological materials may be performed by capturing, in an uncalibrated environment, a digital image of an exposed test strip, together with an adjacently-located reference color chart or on-strip color chart. The image data specifically representing the individual test pads on the test strip, as well as the reference color blocks on the reference chart, are then located within the captured image, and compared to identify any color matches between the test pads and the corresponding sequences of reference color block. Based on this comparison operation, a set of test results can be generated which effectively identifies which of the reference chart's color blocks most closely matches the color of the corresponding dipstick's test pads. The generated test results may then be provided to the user in a printed or displayed form. Alternatively, the test results may simply be stored for later retrieval.

An assortment of color elements is grouped within a plurality of color families which are organized in accordance with a circular color chart (FIG. 10A) and a columnar chart (FIG. 11-A). Except for the neutral-gray color family, a pair of boundary-hues respectively defines the extent of acceptable hue variation within each group, resulting in an included range of hue within each color family, and an excluded range of hue in between neighboring color families. Variant-hue charts enhance color comparison and selection within each main color family by displaying contrasting variations of all three color attributes, that is, value, saturation, and hue, within a single chart. Variant-hue charts also consolidate color elements into a compact format, and provide a graphical user interface for computer color selection.

In order to allow a user to arbitrarily set color processing parameters which determine the color reproduction characteristics of a digital camera according to user's preference, an image processing unit obtains color data by performing the same processing as that performed by the digital camera with respect to the sensed data of each color patch included in a color chart by using color processing parameters. A changing unit displays, on a display unit, a target data changing window which presents color data and the target data (the target color of color reproduction) of each color patch and allows the user to change the target data. A parameter editing unit edits color processing parameters so as to reduce the color difference between the changed target data and color data. A data input/output unit transmits the edited color processing parameters to the digital camera.

Methods and electronic devices for performing color-based reaction testing of biological materials. The method includes capturing and interpreting digital images of an unexposed and later exposed paddle at various delay times within an automatically calibrated environment. The test paddle includes a unique identification mechanism (UID), a Reference Color Bar (RCB) providing samples of standardized colors for image color calibration, compensation and corrections, and several test-specific sequences of Chemical Test Pads (CTP). The method further includes locating the paddle in the image, extracting the UID and validating the paddle, extracting the RCB and locating the plurality of CTP in each image. The method further reduces image noise in the CTP and calibrates the image automatically according to lighting measurements performed on the RCB. To determine test results, the method further determines several distances between the CTP and its possible trajectory in the color space described by the Manufacturer Interpretation Color Chart.

A biological material test strip and adjacently-located reference color chart are affixed to a lid portion of an all-in-one specimen cup to perform color-based reaction testing of collected biological specimens in an uncalibrated environment. After specimen collection, the lid portion is secured to a container portion of the specimen cup. The cup may then be rotated into an upside down position causing the specimen, under the force of gravity, to pass from the container portion and into a volume of the lid portion, such that the test strip is exposed to the specimen as it is received into the volume of the lid portion. An image of the exposed test strip and adjacently-located reference color chart may then be captured and processed to identify any color matches between the individual test pads on the test strip and the corresponding sequences of reference color blocks on the reference chart.

The invention discloses a method for calibrating colors of multiple cameras in an open environment, comprising the specific steps as follows: firstly, the white balance of a single camera is calibrated by adopting an X-Rite 24 color standard color card so as to solve the problem that physical parameters of the cameras are inconsistent with one another; secondly, data of the X-Rite 24 color standard color card of different cameras under different monitoring scenes is obtained, the position of the color card is obtained in a man-machine interaction way, the position and the color average value of each color lump in the color card are calculated to obtain 24 color values in two scenes with multiple cameras, color mapping relation among the cameras is calculated in a polynominal regression method, and each camera is subjected to color calibration; and finally, areas with similar colors in the two scenes are found according to an H-S color matching method, and color calibration parameters are adjusted in a self-adaption way by detecting the change of pixel colors in the matched areas with the similar colors through on-line detection, thereby ensuring that the multiple cameras in a monitoring system are consistent in color in the open environment.

A detection method of color restoration of digital cameras includes the following steps: firstly, a standard color card is put on a back wall in a lamphouse, and the LAB value of each color block on the standard color card is detected by a luminance and chroma meter and taken as a standard LAB value of the color block to be memorized into a computer; secondly, under the same measurement condition, the optical axis of the camera is vertical to the surface of the color block in the lamphouse and then a picture is taken; thirdly, the taken picture is input into the computer, the RGB value of each color block of the picture is obtained and converted into the LAB value, and the total color difference of each color block is calculated. The detection method of color restoration of digital cameras can correctly and reliably detect the color deviation of images and accurately calculate the color deviation degree of images. The calculating effect of the method on the color deviation is in line with the feeling of human eyes, and the calculation has high efficiency and is objective and accurate.

A display characteristics recognition apparatus has a color chart data output unit outputting a color chart data representative of a predetermined color chart to a display unit, a color name input unit for entering a name of a color of the color chart, and a display characteristics identification unit for determining display characteristics of the display unit in accordance with the color chart data outputted from the color chart output unit and the name of the color entered through the color name input unit.

Methods and apparatus, including computer program products, for presenting color samples in a color chart. The color chart includes an arrangement of multiple color samples that include colored areas representing colors in a color space. Color samples in the arrangement are associated with one or more color identifiers that uniquely identify the colors represented by the corresponding color samples. A gamut identifier identifies a color gamut relative to the colors represented by the color samples in the arrangement. A gamut mapping is provided to map a color from outside the color gamut to a color inside the color gamut.

The embodiment of the invention discloses an image color correction method, apparatus and system. The method comprises the following steps: obtaining color card images of a standard color card at a plurality of different color temperatures, performing analysis to obtain standard reference values and original collection values of RGB three channels of color blocks in the standard color card at thecolor temperatures, and calculating a calibrated color correction matrix at each color temperature, wherein the color correction matrix is a 3*N-dimensional color correction matrix, N is a positive integer, and N is greater than or equal to 3; and obtaining an input pixel value of an image to be corrected, determining a target color temperature in a collection environment of the image to be corrected, matching a target color correction matrix corresponding to the target color temperature, and correcting the color of the image to be corrected according to the target color correction matrix andthe input pixel value of the image to be corrected. According to the image color correction method, apparatus and system disclosed by the invention, the color of the image is corrected by designing the color correction matrix with high dimensions and adding a medium gray block constraint item, so that the color rendition effect is better, and the chromatic aberration in the image color correctionis weakened.

A method, test reagent and device usable as a test strip for detecting toxic ammonia levels in water samples such as aquarium water. The volume of the water to be tested contacted with a soda lime reagent to raise the pH to at least 10, and simultaneously contacted with a hydrophobic barrier membrane capable of allowing only ammonia gas to pass through. The membrane is coated with a pH chromogenic indicator mixture which changes color if ammonia gas passes through. The color response of the sample is compared with standard color charts to determine the toxic ammonia potential.

The invention provides tea polyphenol test paper, which is prepared by using transition metal, such as iron, as a color development agent; using tartaric acid, citric acid, oxalic acid, hydrofluoric acid and salicylsulfonic acid, or any of sylvite, sodium salt and potassium sodium tartrate thereof as a complexing agent; and using soluble starch, polyvinyl alcohol, agaragar, polyacrylamide gel or gelatin as a bonding agent. Meanwhile, a standard tea polyphenol concentration color card is prepared. The tea polyphenol content can be quickly and visually observed according to the contrast between the color development of a sample to be tested on the detecting test paper and the standard color card. The test paper is suitable for quickly measuring the tea polyphenol content in plants or plant products, particularly suitable for the measurement of tea polyphenol content in tea. The test paper has the advantages of simple method, convenience, rapidness, low cost and easy popularization.

A method enabling checks on correctness of color signal values and an extracting region, which comprises a region deciding step of deciding an extracting region for each color region of a color chart image, an extracting step of calculating a representative color signal value of the color region, a displaying step of making a display unit display the extracting region along with the color chart image, and a determining step of determining correctness of the representative color signal value on the basis of the extracting region and the color chart image displayed on the display unit. This invention is applied when a color transformation table for a color input device such as a color scanner is created, when gradation maintainability of a color input device such as a color scanner is checked, and when a color transformation table for a color output device such as a color printer is created.

The present invention provides a six-color separation printing method of a color chart, effectively resolving the problems that the color of the prints is not bright and full, and each color version is easy to generate bumping net phenomenon under the prior equipment and technical condition, the technical solution includes following steps: the manuscript is scanned to a digital image of red, green and blue mode, changed to a digital image of CIELAB color mode after the color space conversion, divided into a six-color separation version data of yellow, magenta, cyan, black, orange and green by an algorithm of six-color separation, the data is outputted to a screening film by amplitude modulation and screening of a camera after explained of a raster image processor, burnt to a printing plate by a copyboard, printing by a printer, or outputted by amplitude modulation and screening of a direct platemaker, the prints is printed by the printer, the invention greatly improves the quality of the prints, the prints have bright and full color, each color version does not produce bumping net phenomenon, especially for printing high exquisite articles.

An endoscope apparatus includes: an endoscope which includes an imaging optical system and an illumination optical system; and a control unit which includes light source units and connected to the endoscope and supplying at least excitation light to the illumination optical system, and an image processing section correcting an image signal output from the imaging element on the basis of a predetermined color correction table. The control unit performs a calibration process in such a manner that an image of a color chart having a plurality of color patches with known chromaticity values is captured by an imaging element, chromaticity for each of the plurality of color patches is obtained from an imaging signal of the color chart, and the contents of the color correction table are changed.

An image processing apparatus is provided that can adjust an output profile used for color matching in output devices. The image processing apparatus comprises: a unit to convert a target value of a device-independent color space into a value of a device-dependent color space; a unit to create a color chart to adjust the converted value of the device-dependent color space; a unit to select in the device-independent color space measured values measured from the color chart; a unit to convert the selected measured values into values of device-dependent color space, and calculate a target value of the device-dependent color space corresponding to the target value of the device-independent color space, and a unit to adjust the conversion unit based on the calculated target value of the device-dependent color space.

An image output controller is capable of directly or indirectly controlling a printer printing a color chart and a color measuring apparatus carrying out color measurement for the color chart. When color authentication is executed for an optionally set image, a process is carried out in relation to user's setting or automatic optimization including at least one of a printing position of the color chart, a layout of the color chart and a color value of the color chart. The printer is controlled according to a printing condition based on the user's setting or the automatic optimization so that the color chart is printed on a sheet of predetermined printing paper. The color measuring apparatus is controlled so as to carry out color measurement for the printed color chart.

A reactive test strip having a pre-exposure color is used to measure and indicate the concentration of copper ions in brake fluid in terms of a readily visible color change. The strip is immersed in the fluid within a brake fluid container and any resulting color change is compared to a color chart and a known test standard representative of the maximum metal concentration determined empirically to correspond to a boiling point considered safe for normal operation. If the color change indicates a higher copper concentration than the known test standard, then the fluid is considered inadequate for safe operation and thus recommended for replacement without any further tests. Similar copper or metal strips can also be used in a similar test to determine iron or zinc concentration within the brake fluid so as to also determine suitability of the brake fluid for ensuring safe operation. An automated version of the reactive test strip for performing brake fluid testing includes an optical instrument to compare the color obtained during the test against a predetermined test standard and determine whether or not a brake fluid change is recommended.

An inspection apparatus includes circuitry to acquire a first scanned image by scanning each recording media printed with a target image, acquire a second scanned image by scanning one recording medium printed with a color chart including a plurality of color patches, generate index color information including information of index colors having higher frequency of occurrence on the one recording medium for each of the color patches, generate color conversion information by associating each of the color patches and each of the index colors, generate a reference image for each of the index colors by performing a color conversion of the target image by applying the color conversion information, calculate a difference of a color value of each pixel configuring the first scanned image and a color value of each pixel of each of reference images, and inspect the printed matter based on a plurality of color difference values.

A color adjusting method including: creating a first color profile for each of a first and a second image outputting apparatuses, based on values obtained by measuring a color chart; creating a second color profile based on the first color profile; and adjusting by using the second color profile in such a manner that an output color of the second image outputting apparatus matches to that of the first image outputting apparatus. The color adjusting method further including: adjusting lightness; and adjusting chroma by changing the values of the predetermined color system so as to adjust the chroma in response to the ratio of the lightness before to the lightness after the adjusting lightness step; wherein, the second color profile is created, based on the values having been adjusted in the adjusting lightness step and in the adjusting chroma step.