Image displaying system and image displaying method
An image generation apparatus increases an adjustment amount of a luminance distribution to a target value B at a time t 0 at which an amount of light entering the eyes of a user changes to such a degree that the change has an influence on an action of photoreceptor cells, to thereby cause a head-mounted display to display an image 310 b having a luminance increased from that of an original image 310 a . The image generation apparatus gradually decreases the adjustment amount of the luminance distribution during a restoration period Δt in such a manner that an image 310 c having the original luminance distribution is displayed at a later time t 1.
1 . An image displaying system comprising:
one or more processors; and
one or more computer-readable media storing instructions which, when executed by the one or more processors, cause the image displaying system to perform operations comprising:
detecting, on a basis of predetermined information, a degree of change in an amount of light entering eyes of a user, wherein the degree of change causes a decrease of visibility in an action of photoreceptor cells of the eyes of the user;
controlling adjustment of a luminance distribution of an image in accordance with a rule corresponding to the degree of change;
converting a luminance represented by an image value in accordance with the rule; and
outputting data of the image having the converted luminance.
2 . The image displaying system according to claim 1 , wherein the operations further comprise increasing the luminance in response to a decrease of the amount of light and decreasing the luminance in response to an increase of the amount of light.
3 . The image displaying system according to claim 1 , wherein the operations further comprise converting the luminance in such a manner that a rate of change in the luminance depends upon the luminance before the adjustment.
4 . The image displaying system according to claim 1 , wherein the operations further comprise converting the luminance with use of a gamma curve to carry out adjustment.
5 . The image displaying system according to claim 1 , wherein the operations further comprise acquiring a degree of the change in the amount of light on the basis of the predetermined information and controlling the adjustment of the luminance distribution with an adjustment amount according to the degree.
6 . The image displaying system according to claim 1 , wherein the operations further comprise determining an adjustment amount of the luminance distribution at a time at which the change occurs, as a target value, and gradually decreases the adjustment amount in such a manner as to reach a state free from adjustment.
7 . The image displaying system according to claim 4 , wherein the operations further comprise acquiring a degree of the change in the amount of light on the basis of the predetermined information and causes a state free from the adjustment to be reached in a period of time according to the degree.
8 . The image displaying system according to claim 1 , wherein the operations further comprise detecting, on a basis of a detection result of a contact sensor provided in a head-mounted display that is a displaying destination of an image, a decrease of the amount of light caused by wearing of the head-mounted display.
9 . The image displaying system according to claim 1 , wherein the operations further comprise detecting the change in the amount of light on a basis of a change in size of a pupil appearing in an image captured by an infrared camera provided in a head-mounted display that is a displaying destination of the image.
10 . The image displaying system according to claim 1 , wherein the operations further comprise detecting the change in the amount of light by acquiring a change in the luminance of an image being displayed, on a basis of a result of drawing of the image or on a basis of metadata of a content for which the image is displayed.
11 . The image displaying system according to claim 1 , wherein the operations further comprise detecting the change in the amount of light by specifying switching of a content of a displaying target or switching between a content screen image and a system screen image on a basis of details of a user operation.
12 . The image displaying system according to claim 1 , wherein the operations further comprise:
detecting starting of a head-mounted display that is a displaying destination of an image;
predicting a decrease of the amount of light to be caused by wearing of the head-mounted display; and
controlling the luminance in such a manner as to increase at a point of time before the wearing.
13 . An image displaying method comprising:
detecting, on a basis of predetermined information, a degree of change in an amount of light entering eyes of a user, wherein the degree of change causes a decrease of visibility in an action of photoreceptor cells of the eyes of the user;
controlling adjustment of a luminance distribution of an image in accordance with a rule corresponding to the degree of change;
converting a luminance represented by an image value, in accordance with the rule; and
outputting data of the image having the converted luminance.
14 . A non-transitory computer readable storage medium comprising computer program instruction that, when executed by one or more processors, cause the one or more processors to perform actions comprising:
detecting, on a basis of predetermined information, a degree of change in an amount of light entering eyes of a user, wherein the degree of change causes a decrease of visibility in an action of photoreceptor cells of the eyes of the user;
controlling adjustment of a luminance distribution of an image in accordance with a rule corresponding to the degree of change;
converting a luminance represented by an image value, in accordance with the rule; and
outputting data of the image having the converted luminance.
15 . The image displaying system according to claim 1 , wherein the rule comprises:
increasing a luminance equal to or lower than a first predetermined luminance by multiplying the luminance by a coefficient, wherein the coefficient determined based on the first predetermined luminance; and/or
increasing the luminance based on a function in which a rate of increase of the luminance has a maximum at a second predetermined luminance.
16 . The image displaying system according to claim 15 , wherein the second predetermined luminance is determined based on a luminance region or based on the degree of change.
17 . The image displaying method according to claim 13 , wherein the rule comprises:
increasing a luminance equal to or lower than a first predetermined luminance by multiplying the luminance by a coefficient, wherein the coefficient determined based on the first predetermined luminance; and/or
increasing the luminance based on a function in which a rate of increase of the luminance has a maximum at a second predetermined luminance.
18 . The image displaying method according to claim 17 , wherein the second predetermined luminance is determined based on a luminance region or based on the degree of change.
19 . The non-transitory computer readable storage medium according to claim 14 , wherein the rule comprises:
increasing a luminance equal to or lower than a first predetermined luminance by multiplying the luminance by a coefficient, wherein the coefficient determined based on the first predetermined luminance; and/or
increasing the luminance based on a function in which a rate of increase of the luminance has a maximum at a second predetermined luminance.
20 . The non-transitory computer readable storage medium according to claim 19 , wherein the second predetermined luminance is determined based on a luminance region or based on the degree of change.