Image compensation apparatus
An image compensation apparatus for use with a video display and a video camera, the video camera being arranged to capture images of a scene in front of the video display. The image compensation apparatus includes an analyzer configured to analyze successive frames of data provided to the video display, the successive frames of data being for displaying respective successive display images, a processor configured to calculate the illumination effect of the successive display images on the scene in front of the video displays and a compensator configured to apply image compensation to the successive images captured by the video camera so as to compensate for the effect of illumination by the video display of the scene in front of the video display.
1. An image compensation apparatus for use with a video display and a video camera, the video camera configured to capture images of a scene in front of the video display, the image compensation apparatus comprising:
an analyzer configured to analyze successive frames of data provided to the video display, the successive frames of data displaying respective successive display images;
a processor configured to calculate an illumination effect of the successive display images on the scene in front of the video display; and
a compensator configured to apply image compensation to the successive images captured by the video camera by controlling image capture parameters of the video camera to compensate for the effect of illumination by the video display of the scene in front of the video display.
2. The image compensation apparatus according to claim 1 , wherein the compensator is configured to receive image data from the video camera as input data, to apply image compensation by adjusting values of the input data and to output adjusted data for use in place of the image data.
3. The image compensation apparatus according to claim 1 , wherein the compensator is configured to control at least one of a shutter speed, a diaphragm opening and bias voltages of the camera to achieve image compensation.
4. The image compensation apparatus according to claim 1 , wherein the illumination effect is the effect of light from the display images displayed on the video display being reflected off the scene in front of the video display.
5. The image compensation apparatus according to claim 1 , wherein the compensator is configured to apply image compensation for compensating for changes in white balance in the successive images captured by the video camera.
6. The image compensation apparatus according to claim 1 , wherein the compensator is configured to apply image compensation for compensating for changes in brightness in the successive images captured by the video camera.
7. The image compensation apparatus according to claim 1 , wherein the analyzer is configured to calculate average display data for the entirety of each successive display image and the processor is configured to calculate the corresponding illumination effect of each display image on the basis of the respective display data.
8. The image compensation apparatus according to claim 1 , wherein the compensator is configured to apply image compensation to each respective one of the successive images captured by the video camera according to the corresponding one or more respective display images displayed by the video display during the respective period of image capture.
9. The image compensation apparatus according to claim 1 , wherein the video display has a display surface for displaying the video images and the video camera is provided integrally with the video display alongside the display surface.
10. A video display apparatus comprising:
a video display;
a video camera; and
an image compensation apparatus for use with the video display and the video camera, the video camera configured to capture images of a scene in front of the video display, the image compensation apparatus including
an analyzer configured to analyze successive frames of data provided to the video display, the successive frames of data displaying respective successive display images;
a processor configured to calculate an illumination effect of the successive display images on the scene in front of the video display; and
a compensator configured to apply image compensation to the successive images captured by the video camera by controlling image capture parameters of the video camera to compensate for the effect of illumination by the video display of the scene in front of the video display.
11. A method of image compensation for images captured by a video camera of a system including a video display and the video camera, the video camera capturing images of a scene in front of the display, the method comprising:
analyzing successive frames of data provided to the video display, the successive frames of data displaying respective successive display images;
calculating an illumination effect of the successive display images on the scene in front of the video display; and
applying image compensation to the successive images captured by the video camera by controlling image capture parameters of the video camera to compensate for the effect of illumination by the video display of the scene in front of the video display.
12. A non-transitory computer readable medium having stored thereon a program that when executed by a computer causes the computer to execute an image compensation method comprising:
analyzing successive frames of data provided to the video display, the successive frames of data displaying respective successive display images;
calculating an illumination effect of the successive display images on the scene in front of the video display; and
applying image compensation to the successive images captured by the video camera by controlling image capture parameters of the video camera to compensate for the effect of illumination by the video display of the scene in front of the video display.