An image processing apparatus comprises: an obtaining unit configured to obtain a dynamic range of a captured image on captured image data; a determination unit configured to determine a dynamic range of a printed product when viewed obtained by printing the captured image based on the captured image data, based on printing information on viewing of the printed product; and a conversion unit configured to perform conversion processing for luminance of the captured image data to the dynamic range determined by the determination unit from the dynamic range obtained by the obtaining unit.

An image reproduction system and methods for providing colorant data to an end device. A method includes extracting general HSV value data for each pixel of an image from image data. For each pixel, the general HSV value data is transformed to generate universal perceived brightness, Bp, and universal perceived chroma, Cp, value data. End-device colorant data associated with the general HSV value data is retrieved for each pixel and scaled using the Bp and Cp value data to obtain scaled end-device colorant data. The scaled end-device colorant data is transmitted to the end device.

A color conversion table creation method includes creating a reference color conversion table using a color value of a color chart, and adjusting a color conversion table by adjusting an output value of a specific grid point corresponding to a predetermined input value in the created reference color conversion table, in which the adjusting the color conversion table includes an adjustment amount calculation step of calculating an adjustment amount of the output value of the specific grid point, a ripple amount determination step of determining a ripple amount when the calculated adjustment amount propagates with respect to a peripheral grid point existing in a vicinity of the specific grid point, and an application step of applying the determined ripple amount to the peripheral grid point in the color conversion table.

A system and method for tile type based color space transformation improves the performance and image quality of multifunction devices. The disclosed embodiments transform an input image on a tile by tile basis. If a tile is detected as neutral, simple 1D L* to CMYK Tone Reproduction Curves or Look-Up-Tables are used to convert the input pixels of the tile in L*a*b* to output pixels in CMYK. If a tile is detected as containing color content, then the input pixels are chrominance adjusted and subsequently converted to CMYK using regular tetrahedral interpolation.

An apparatus and a method that decrease a banding phenomenon in a subsampled image and achieve high image quality are provided. A subsampled image obtained by copying an adjacent pixel value to a pixel value thinning position is accepted as an input image; a correction target signal global gain is calculated as a ratio between a slope of a correction target signal and a slope of a luminance signal of a global region made up of a plurality of consecutive pixels including a pixel position of the correction target pixel of the input image; a luminance local slope is calculated as a slope of the luminance signal of a local region which is a region within the global region, including the pixel position of the correction target pixel of the input image and smaller than the global region; and a corrected pixel value of the correction target pixel is calculated.

A system and method for tile type based color space transformation improves the performance and image quality of multifunction devices. The disclosed embodiments transform an input image on a tile by tile basis. If a tile is detected as neutral, simple 1D L* to CMYK Tone Reproduction Curves or Look-Up-Tables are used to convert the input pixels of the tile in L*a*b* to output pixels in CMYK. If a tile is detected as containing color content, then the input pixels are chrominance adjusted and subsequently converted to CMYK using regular tetrahedral interpolation.

An image processing apparatus is an apparatus for displaying an image corresponding to a printed product observed in a predetermined observation environment on a monitor. An image obtaining unit obtains an HDR image. A lighting luminance obtaining unit obtains a lighting luminance in the predetermined observation environment. A monitor luminance changing unit changes a luminance of the monitor according to the lighting luminance. A preview image generating unit converts the HDR image according to the lighting luminance. A preview image outputting unit outputs converted image data to the monitor having the luminance thereof changed.

To have a much better usable pragmatic manner of HDR video encoding and decoding, the inventor invented a high dynamic range video decoder (500) arranged to receive an encoding (Im_COD) of a high dynamic range video and to decode and output a set of temporally successive images (Im_RHDR) comprising: An input (502) to receive three weight values (kRY, kGY, kBY); A video decoder (501) arranged to decode the encoding (Im_COD) into an intermediate image (Im_RLDR) being in a YCbCr color representation; A brightness index calculation unit (503) arranged to calculate for each pixel of the intermediate image (Im_RLDR) a brightness index (J) being defined as J=Y+MAX{kRY*(RY), kGY*(GY), kBY*(BY)}; A brightness mapper (505) arranged to receive a specification of at least one one-dimensional function F_ct, and to apply it with the brightness index (J) as input, to obtain an output brightness index (J*); A multiplication factor calculation unit (506) arranged to calculate a multiplicative factor (g) being equal to the output brightness index (J*) divided by the brightness index (J); Three multipliers (509, 510, 511) to multiply the respective color components (Y, Cr, Cb) of each pixel of the intermediate image (Im_RLDR) with the multiplicative factor (g), to obtain an output color (YH, CbH, CrH) for that pixel in the output dynamic range image (Im_RHDR) of the set of temporally successive images being currently decoded.

An information processing apparatus includes a display and a controller. The display displays an image. The controller controls the display to display a color setting section that sets information regarding a selected color selected from among multiple predetermined colors, and an effect presenting section that presents visual effect information representing a visual effect of the selected color.

The disclosure describes a high dynamic range video coding pipeline that may reduce color artifacts and improve compression efficiency. The disclosed pipeline separates the luminance component from the chrominance components of an input signal (e.g., an RGB source video) and applies a scaling of the chrominance components before encoding, thereby reducing perceivable color artifacts while maintaining luminance quality.