Sony Corporation

Naoya Kato

Masahiko Ito

Kiyotaka Nakabayashi

Tatsuya Deguchi

Farhan A Baqai

Takami Mizukura

Koichiro Kakinuma

Xiaoling Wang

Improving color calibration, and similar operations, by generating an optimal raw RGB color chart, in the raw RGB domain, for an imaging device with a given type of image sensor, such as for a digital still camera. Calibration is performed in response to a constraint which takes into account the spectral sensitivity of the image sensor used on the camera as well as spectral reflectance and spectral radiance of multiple illuminants. Calibration is performed using the raw RGB color chart which is illuminant independent and image sensor specific and which can match the calibration performance of known calibration standards, such as Macbeth 24.

Optimal raw RGB determination for color calibration

An image-processing apparatus for processing the image data input from an image-handling device and then outputting the image data to another image-handling device. The apparatus comprises a black-adaptation correction device. The black-adaptation correction device corrects the image data in consideration of the fact that adaptation to black varies from person to person, if the darkest points of the image-handling devices differ from each other. Since the image is so corrected, the colors of the images produced by the image-handling devices look almost the same in spite of the fact that the darkest points of the image-handling devices differ from each other.

Image-processing apparatus and image-processing method

An image on the original to be printed on a print sheet P by a printing machine is scanned by a scanner, and the data is edited by an editing section. The edited data is converted from the data dependent on the device (printing machine) to data not dependent on the device with the use of a device profile P which a converter has. A luminous-environment conversion circuit compensates the data sent from the converter according to the data corresponding to surrounding light, output from a sensor S , and data related to the paper color of the print sheet P , output from the sensor S . Another luminous-environment conversion circuit compensates input data according to the paper color of a print sheet P in a printer or surrounding-light data, output from sensors S and S . Another converter converts the output of the luminous-environment conversion circuit to data dependent on the printer and the data is printed on the print sheet P by the printer.

Image processing apparatus and method, and transfer medium

In the present invention, RGB data outputted by a transmission side CRT monitor is converted by a profile P stored in a converter into XYZ data which is corrected in agreement with the viewing conditions on the transmitting side by having reference to detection signals from sensors S , S so that the data is outputted as L M S data. A viewing condition conversion circuit refers to detection signals from sensors S , S to correct the L M S data in agreement with the viewing conditions on the reception side to supply the resulting XYZ data to the converter . The converter refers to a profile P to convert the XYZ data into RGB data which is outputted to a CRT monitor . This equates color appearance of a picture on an input device on the transmission side to that of a picture on an output device on the reception side.

TRANSMISSION APPARATUS, TRANSMITTING METHOD, RECEPTION APPARATUS, RECEPTION METHOD, PICTURE PROCESSING SYSTEM, PICTURE PROCESSING METHOD, PICTURE DATA PROCESSING APPARATUS, PICTURE DATA PROCESSING METHOD AND FURNISHED MEDIUM

A printer device and a picture printing method is disclosed, in which, if the gradation for cyan is to be represented, an ink C&prime; of low concentration is superimposed to represent the low gradation area. This cyan ink is used in combination with a high-concentration blue ink B and a high-concentration green ink G to represent a high gradation area. In representing the high gradation area, the emitting proportions of the high-concentration blue ink B and the high-concentration green ink G are changed to enable the color hue in the high gradation area to be varied delicately to improve color reproducibility.

Printer and printing method

Information on ambient light (viewing environment information) input from ambient light input section is fed to viewing environment converting section , which determines measured color values of monitor , and then fed to profile updating section and contrast correcting section . The contrast correcting section corrects the contrast according to the measured color values. Information on the setting of the monitor fed from monitor control section is supplied to monitor setting values converting section , where TRCs and a matrix are generated according to the modified setting information and supplied to the profile updating section . The profile updating section updates the profiles stored in memory by means of newly generated profiles.

Image processing device and method, image transmission/receptor system and method, and providing medium

IMAGE PROCESSING APPARATUS AND METHOD, COLOR GAMUT CONVERSION TABLE CREATING APPARATUS AND METHOD, STORAGE MEDIUM HAVING IMAGE PROCESSING PROGRAM RECORDED THEREIN, AND STORAGE MEDIUM HAVING RECORDED THEREIN COLOR GAMUT CONVERSION TABLE CREATING PROGRAM

When an output color gamut is different from an input color gamut in a picture input/output system such as DTP, the color is corrected with a predetermined function for a difference in the lightness-directional dynamic range. A three-dimensional compression is made to compress the color of areas C and D to an area (A&plus;B), and next a two-dimensional compression (or shrinkage) is made to compress the color of the area (B&plus;C) to the area B, for example.

Growing community of inventors

Chiba, Japan

Naoya Kato