Provided is a color adjustment method for a display apparatus. The color adjustment method includes: measuring first luminance coordinate data indicating a luminance and color coordinates of a color displayed on a display device when image data corresponding to a white point is supplied to a drive circuitry; measuring second luminance coordinate data indicating luminances and color coordinates of colors displayed on the display device when image data corresponding to the white color of intermediate grayscale values are supplied to the drive circuitry; measuring third luminance coordinate data indicating a luminance and color coordinates of a color displayed on the display device for each of R, G and B elementary color points when image data corresponding to each of the R, G and B elementary color points is supplied to the drive circuitry; and calculating correction parameters based on the first to third luminance coordinate data.

There is provided a system including a memory and a processor configured to display targets on a display, each target having at least one target color, receive an input signal transmitted by a user device indicating at least one color value obtained from an image captured by the user device, the image including a portion of one of the targets displayed on the display, compare the color value indicated by the input signal with each of target colors in a target color database, determine the input signal is indicative of a first target of the targets based on a match between the color value indicated by the input signal and one of the target colors in the target color database, and execute an event involving the first target, in response to determining that the input signal is indicative of the first target of the targets.

An apparatus for image coding includes a processor to: execute a determining process that includes, when a specific entry included in a first palette for use in coding a first block in a coding-target image is not an entry candidate for a second palette for use in coding a second block to be coded after the first block, determining an entry to be included in the second palette based on a first index indicating a code amount to be generated when the specific entry is to be included in the second palette and a second index indicating a code amount to be generated when the specific entry is not to be included in the second palette; execute a generating process that includes generating the second palette including the entry determined in the determining process; and execute a palette coding process that includes coding the second block by the second palette.

The present invention discloses a color display method and system for a mobile terminal. According to the method, an environmental ambient light level for a mobile terminal is detected, a color enhancement factor is calculated according to the ambient light level, and display color of the mobile terminal is enhanced according to the color enhancement factor. A color enhancement technology widely used in a display screen is combined with the environmental ambient light level. The color enhancement is dynamically adjusted according to the intensity of ambient light.

The present invention discloses a color display method and system for a mobile terminal. According to the method, an environmental ambient light level for a mobile terminal is detected, a color enhancement factor is calculated according to the ambient light level, and display color of the mobile terminal is enhanced according to the color enhancement factor. A color enhancement technology widely used in a display screen is combined with the environmental ambient light level. The color enhancement is dynamically adjusted according to the intensity of ambient light.

A perceived gamut (PG) of a physical display device presenting frames of an image sequence to a human viewer may be increased. An interface of the system receives a sequence of frames from an image sequence source with each frame having input color data associated with each pixel of the respective frame, the input color data being given in a specified color space. A perceived color computation module computes for each particular frame of the received image sequence perceived colors of each pixel and a frame-specific adapted white point. An optimizer module applies a chromatic adaptation transformation to each window frame to determine display gamut adjusted perceived colors of each pixel of the respective frame and an error per window frame. The chromatic adaptation transformation is updated for all window frames to minimize the determined error, and the current frame is output to the display.

A perceived gamut (PG) of a physical display device presenting frames of an image sequence to a human viewer may be increased. An interface of the system receives a sequence of frames from an image sequence source with each frame having input color data associated with each pixel of the respective frame, the input color data being given in a specified color space. A perceived color computation module computes for each particular frame of the received image sequence perceived colors of each pixel and a frame-specific adapted white point. An optimizer module applies a chromatic adaptation transformation to each window frame to determine display gamut adjusted perceived colors of each pixel of the respective frame and an error per window frame. The chromatic adaptation transformation is updated for all window frames to minimize the determined error, and the current frame is output to the display.

Provided is a method for displaying an image including: acquiring a to-be-displayed image; correcting the to-be-displayed image based on a target look-up table, wherein in the target look-up table, at least one of the original pixel values and a corresponding corrected pixel value satisfy: an absolute value of a difference between a first chroma and a second chroma is less than or equal to a chroma difference threshold, wherein the first chroma is a chroma of a first pixel, a pixel value of the first pixel being acquired by converting the original pixel value, and the second chroma is a chroma of a second pixel displayed by the display device, a pixel value of the second pixel being acquired by converting the corrected pixel value; and displaying a corrected to-be-displayed image.

Provided is a method for displaying an image including: acquiring a to-be-displayed image; correcting the to-be-displayed image based on a target look-up table, wherein in the target look-up table, at least one of the original pixel values and a corresponding corrected pixel value satisfy: an absolute value of a difference between a first chroma and a second chroma is less than or equal to a chroma difference threshold, wherein the first chroma is a chroma of a first pixel, a pixel value of the first pixel being acquired by converting the original pixel value, and the second chroma is a chroma of a second pixel displayed by the display device, a pixel value of the second pixel being acquired by converting the corrected pixel value; and displaying a corrected to-be-displayed image.

Visual effects such as bleach bypass, sepia tone conversion, cross processing, custom effects, and many others may be applied to video streams before they are displayed to viewers. In some examples, different visual effects may be applied to the same underlying video content, such as on a viewer-by-viewer basis or at other levels of granularity, thereby allowing certain particular visual effects to be targeted to particular viewers/devices. The visual effects may be applied by one or more of a content provider, a video streaming service, one or more viewers, or by other entities. The visual effects may be applied based at least in part on instructions from the provider, such as one or more tags, for example that may be issued via an interface provided by a video streaming service.