593results about "Color measuring using colour charts" patented technology

A paint color matching and coordinating system comprises an interface for receiving an input reference color, a processor capable of reading a memory, a memory including (1) instructions readable by the processor and (2) a database of architectural paint colors spanning all or most of the known color space, and a display generator. In use, the interface of the system receives an input reference color from a user. The processor selects a “reference paint color” from the database, the reference paint color being visually closer, with respect to color space, to the input reference color than any other paint color in the database. According to the invention, color space is divided into a plurality of fixed, generally equally sized, non-overlapping, contiguous portions, each color space portion being defined as the space of all colors within a band of hues within color space. The processor selects five sets of paint colors—one set from each of the color space portions that include the five hues that comprise the “five-way harmony” of the reference paint color. The processor may also select a sixth set of paint colors from the color space portion that includes the hue of the reference paint color. Finally, the processor directs the display generator to create a display of color samples of the reference paint color and of the first through sixth sets of paint colors.

To translate a physical color to a color space of a printer device, a color patch is scanned using a printer's internal scanner. The printer then automatically prints that scanned color, together with a range of variations of that color, on the print media on which printing is to occur. A user may quickly and easily select a color match from the range of colors printed, by visual inspection. The user enters the selected color into the printer, using for example a number or position code, or by marking the selected color on the print media, which is then re-scanned by the printer. Thus, an iterative prior art manual procedure of color modification using color data determined by spectrophotometers is avoided.

In order to stabilize a displayed color and to attenuate printing when measuring a color patch for preparing a color conversion profile, an accurate measurement is obtained by waiting for a certain time, repeating the measurement until measurements settle down or using a measurement obtained when the measurements of color patchs of different sizes all become equal. When preparing a matrix profile, which should be stored for higher accuracy, a gamma value or a TRC value is judged and a selected value is stored in the profile. Both a matrix profile and an LUT profile are prepared and a profile with higher accuracy is stored as an available one.

An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.

Systems and methods are provided that accurately estimate a post-printing appearance of a color on a substrate. In addition, systems and methods are provided that accurately estimate a post-mixing appearance of several colors mixed on a substrate.