The present disclosure relates generally to data hiding for retail product packaging and other printed objects such as substrates. One embodiment embeds an information signal in a spot color for printing on various substrates. The spot color is screened, and overprinted with process color tint. The tint is modulated prior to overprinting with optimized signal tweaks. The optimization can include consideration of a detector spectral dependency (e.g., red and/or green illumination). Many other embodiments and combinations are described in the subject patent document.

An image processing apparatus includes a specifying unit, an extraction unit, and a creation unit. The specifying unit specifies, for one image among a first image before color conversion and a second image after color conversion, an area for which image information is extracted. The extraction unit extracts plural pieces of color conversion information, which are image information about pixels in the area of the one image among the first image and the second image, the area being specified by the specifying unit, and image information about pixels in the other image corresponding to the pixels in the one image. The creation unit creates a color conversion property on the basis of the plural pieces of color conversion information extracted by the extraction unit.

An original reading unit that inputs image data; an image generation unit that generates an image based on the image data; an image output unit that outputs, as a preview image, the image generated based on the image data; a touch panel display that displays the preview image; a color change region specifying unit that specifies, in the preview image, a region, a color of which is changed; and a control unit that performs control so that color change of the region specified by the color change region specifying unit is performed are included.

Methods, apparatuses, and systems are disclosed for simulating a tooth whitening procedure. The simulation may generally obtain a patient's two-dimensional or three-dimensional dental scan and color space convert color information from a first or native color space to a color space based on an International Commission on Illumination color space (CIELAB). The simulation may include modifying color information in the CIELAB color space then returning the modified color information to the native color space.

A method and apparatus for automatically selecting a color for overlay on an image or video for presentation on a media device. The system identifies the most prominent color in an image, finds the closest match to that color in a predetermined number of colors, and then uses the closest match color to color the font of the title that is overlaid on the image.

The present disclosure relates generally to encoding signals for spot colors. In one implementation a substitute spot color+CMY tint is selected to replace an original spot color. The CMY tint can be transformed to carry an encoded signal. Of course, other features, combinations and technology are described herein.

A method for inkjet printing machine color control includes color transformation of print data from first color space to process color space in a first stage using a computer transforming print data from the first to an intermediate color space while keeping special colors, and a second stage transforming corrected print data including special colors from intermediate to process color space. The computer uses print data corrected after the first stage as second stage starting values. Print data transformed into the process color space are printed. First color space corresponds to CMYK, flexographic printing or RGB color space with special colors, intermediate color space corresponds to CMYK color space with special colors, process color space corresponds to CMYK color space with additional process colors. The computer corrects CMY, not K print data or special not transformed colors, when correcting print data in the intermediate color space after the first stage.

A computer-controlled system determines attributes of a frexel, which is an area of human skin, and applies a reflectance modifying agent (RMA) at the pixel level to automatically change the appearance of human features based on one or more digital images. The change may be based on a digital image of the same frexel, for as seen in a prior digital photograph captured previously by the computer-controlled system. The system scans the frexel and uses feature recognition software to compare the person's current features in the frexel with that person's features in the digital image. It then calculates enhancements to the make the current features appear more like the features in the digital image, and it applies the RMA to the frexel to accomplish the enhancements. Or the change may be based on a digital image of another person, through the application of RMAs.

An image processing apparatus includes a first setting unit configured to set a target range of a luminance level, and a generation unit configured to generate a processed image by performing image processing on a first region of an image in such a manner that the first region is distinguished from a second region and a third region, the first region having a luminance level included in the target range and having a color not included in a target color gamut, the second region having a luminance level not included in the target range and having a color not included in the target color gamut, and the third region having a luminance level not included in the target range and having a color included in the target color gamut.

An image processing device includes: an acceptance unit that accepts an image information pair composed of image information before color conversion and image information after color conversion; an accuracy output unit that outputs accuracy of a color conversion property from the plural accepted image information pairs; a color conversion property creation unit that creates the color conversion property from the plural accepted image information pairs; and a display control unit that, when the acceptance unit accepts a new image information pair, controls to display, on a display device, at least image information created by color conversion of image information of the new image information pair before color conversion based on the color conversion property created by the color conversion property creation unit from the image information pair that has already been accepted by the acceptance unit and image information of the new image information pair after color conversion.