Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2001-11-13
2004-07-20
Bella, Matthew C. (Department: 2676)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S590000, C345S591000, C345S603000, C345S604000, C345S644000, C382S162000, C358S518000, C348S602000
Reexamination Certificate
active
06765585
ABSTRACT:
Japanese Patent No. 2000-344822, filed on Nov. 13, 2000, and Japanese Patent No. 2000-296027, filed on Sep. 27, 2001, are herein incorporated by reference in their entirety.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an image display system, image processing method, and program.
2. Description of Related Art
Various color conversion systems such as the color management system (CMS) have been proposed in order to provide uniformity in an image view.
However, the desired image view can differ, depending on individuals and location.
As one example, the standardized method for displaying images in Japan is NTSC, whereas one of the standardized methods for displaying images in Europe is PAL.
A situation that can therefore arise in which an image that was generated on the assumption that it would be viewed as NTSC in Japan is displayed in Europe to Europeans, giving rise to a difference in which the image is viewed, from consideration of the preferences of Europeans.
For that reason, it is not sufficient merely to convert the image information (such as the RGB signals), but it is necessary to convert the image information in accordance with an image characteristic such as the display method selected by the user.
Since an image view is also affected by factors such as ambient light, it is also necessary to detect the visual environment and take that visual environment into consideration when converting the image information.
During the conversion of image information in accordance with the image characteristic and the visual environment, the information used for the conversion must be generated. However, storing conversion information for all assumed image characteristics and visual environments beforehand in a storage region places pressures upon that storage region.
In addition, image information that is generated in real time must be converted in real time.
SUMMARY OF THE INVENTION
The present invention was devised in the light of the above-described technical problems and has as an objective thereof the provision of an image display system, image processing method, and program that enable faster reproduction of an optimal image view in accordance with an image characteristic selected by a user.
(1) In order to solve the above described technical problems, according to a first aspect of the present invention, there is provided an image display system which converts image information used for displaying an image and displays the image, based on environmental information obtained by a visual environment detection means which detects visual environment in a display area in which the image is displayed; the image display system comprising:
matrix generation means which generates a conversion matrix used for conversion, based on the environmental information and an image characteristic selected by a user, so as to display the image that is suited to the visual environment and the image characteristic;
matrix conversion means which converts the image information, based on the generated conversion matrix; and
image display means which displays the image based on the converted image information;
wherein the image characteristic is based on at least one of an image display method and an image classification.
(2) According to a second aspect of the present invention, there is provided an image display system which converts image information used for displaying an image and displays the image, based on environmental information obtained by a visual environment detection section which detects visual environment in a display area in which the image is displayed; the image display system comprising:
a matrix generation section which generates a conversion matrix used for conversion, based on the environmental information and an image characteristic selected by a user, so as to display the image that is suited to the visual environment and the image characteristic;
a matrix conversion section which converts the image information, based on the generated conversion matrix; and
an image display section which displays the image based on the converted image information;
wherein the image characteristic is based on at least one of an image display method and an image classification.
(3) According to a third aspect of the present invention, there is provided a computer-readable program for converting image information used for displaying an image, based on environmental information obtained by a visual environment detection means which detects visual environment in a display area in which the image is displayed,
the program causing a computer to function as:
matrix generation means which generates a conversion matrix used for conversion, based on the environmental information and an image characteristic selected by a user, so as to display the image that is suited to the visual environment and the image characteristic; and
matrix conversion means which converts the image information, based on the generated conversion matrix; and
wherein the image characteristic is based on at least one of an image display method and an image classification.
(4) According to a fourth aspect of the present invention, there is provided an image processing method which converts image information used for displaying an image, based on environmental information obtained by a visual environment detection means which detects visual environment in a display area in which the image is displayed, the image processing method comprising:
a matrix generation step of generating a conversion matrix used for conversion, based on the environmental information and an image characteristic selected by a user, so as to display the image that is suited to the visual environment and the image characteristic; and
a matrix conversion step of converting the image information, based on the generated conversion matrix.
The present invention enables conversions that are faster than a case in which a look-up table (hereinafter abbreviated to LUT) is used as conversion information, by generating a conversion matrix for use as conversion information and using that conversion matrix in the conversion of the image information, which also enables a reduction in the dedicated space within a storage region.
It therefore becomes possible to display an image that conforms to the image characteristic selected by the user and the visual environment, in real time.
Note that the image display method in this case refers to a method such as NTSC, PAL, or SECAM. The image classification refers to a system such as RGB or sRGB.
(5) Each of the image display systems may further comprise:
a color gamut calculation means which calculates a target color gamut based on the image characteristic and also calculates a displayable color gamut that is displayable by the image display means in the visual environment, based on the environmental information;
wherein the matrix generation means may generate different conversion matrices according to a relationship between the displayable color gamut and the target gamut, the relationship including a case where the displayable color gamut is larger than the target color gamut, a case where the displayable color gamut is smaller than the target color gamut, a case where the displayable color gamut matches the target color gamut, and a case where the displayable color gamut has a portion that overlaps the target color gamut and a portion that does not overlap the target color gamut.
(6) The program may cause the computer to function as a color gamut calculation means which calculates a target color gamut based on the image characteristic and also calculates a displayable color gamut that is displayable by the image display means in the visual environment, based on the environmental information;
wherein the matrix generation means may generate different conversion matrices according to a relationship between the displayable color gamut and the target gamut, the relationship including a case where the displayable color gamut is larger than the target color gamut, a case where the displayable
Bella Matthew C.
Caschera Antonio
LandOfFree
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