Abstract: A system for determining hair color treatment, including a processor. The processor is configured for: receiving as input an initial spectrum of a sample of hair, the initial spectrum having a wavelength range; calculating a new spectrum of the hair due to a hypothetical hair color treatment as a direct function of the initial spectrum; and outputting data to a device, the data being based upon the step of calculating. The system also includes a spectrum analyzer configured for producing the initial spectrum and a display device configured for displaying a color and hair color treatment instructions based on the data. An alternate embodiment of the invention includes a color mixing device configured for dispensing a hair color treatment based on the data.

Abstract: An apparatus for analyzing a sample hair mixture having a mixture of two hair colors and an overall spectrum representative of the two colors, comprising: a first color selector, configured to select a first spectrum representative of a first color in the hair mixture from a first group of at least one spectrum, and an iterative spectrum combiner, associated with the first color selector and configured to iteratively combine therewith a second spectrum representative of a second color in the hair mixture from a second group of spectra over the first spectrum, thereby to find an optimal combination of first and second spectrum which is a closest match to the overall spectrum.

Abstract: An apparatus for analyzing a sample hair mixture having a mixture of two hair colors and an overall spectrum representative of the two colors, comprising: a first color selector, configured to select a first spectrum representative of a first color in the hair mixture from a first group of at least one spectrum, and an iterative spectrum combiner, associated with the first color selector and configured to iteratively combine therewith a second spectrum representative of a second color in the hair mixture from a second group of spectra over the first spectrum, thereby to find an optimal combination of first and second spectrum which is a closest match to the overall spectrum.

Abstract: A method to change the color of hair. The method includes measuring an initial reflectance spectrum of a sample of the hair and analyzing a contribution of a plurality of natural hair factors to the initial reflectance spectrum. The method also includes calculating a hair treatment based on another reflectance spectrum. A system to measure a reflectance spectrum of a sample includes an integrating sphere having a sampling port and an inner surface and a window disposed near to the sampling port. The window is configured for being placed in close contact with the sample. The system also includes a light source configured to project light onto the sample via the window and a light detector configured to analyze light reflected from the inner surface to produce the reflectance spectrum of the sample.

Abstract: A system for determining hair color treatment, including a processor. The processor is configured for: receiving as input an initial spectrum of a sample of hair, the initial spectrum having a wavelength range; calculating a new spectrum of the hair due to a hypothetical hair color treatment as a direct function of the initial spectrum; and outputting data to a device, the data being based upon the step of calculating. The system also includes a spectrum analyzer configured for producing the initial spectrum and a display device configured for displaying a color and hair color treatment instructions based on the data. An alternate embodiment of the invention includes a color mixing device configured for dispensing a hair color treatment based on the data.

Abstract: In a secure imaging system for securing documents or encrypting images, an image comprises an array of printed positions formed using a group of inks each having a predetermined spectrum. The positions are selected to form a predetermined image, either real or virtual, when the image is viewed through an optical processor. An image formed using inks having the same colors as experienced by the human eye, but not sharing exactly the same spectra, will fail to form the correct predetermined image.

Abstract: A method to change the color of hair. The method includes measuring an initial reflectance spectrum of a sample of the hair and analyzing a contribution of a plurality of natural hair factors to the initial reflectance spectrum. The method also includes calculating a hair treatment based on another reflectance spectrum. A system to measure a reflectance spectrum of a sample includes an integrating sphere having a sampling port and an inner surface and a window disposed near to the sampling port. The window is configured for being placed in close contact with the sample. The system also includes a light source configured to project light onto the sample via the window and a light detector configured to analyze light reflected from the inner surface to produce the reflectance spectrum of the sample.