Method and device for cancelling distortion and displacement of a displayed three-dimensional image

A method for cancelling distortion and displacement of a three-dimensional image that is displayed to a viewer by an autostereoscopic display device, the distortion and displacement being perceived by the viewer, wherein the autostereoscopic display device comprises:

• an eye tracking system for determining the position of the eyes of the viewer relative to the autostereoscopic display device;
• and
• a display portion configured to display a composite three-dimensional image composed of a left image to be viewed by a left eye of the viewer and a right image to be viewed by a right eye of the viewer, the display portion comprising:
• an array of pixels for producing a display output, wherein each pixel is capable of producing a pixel output;
• and
• a transparent plate, which (i) is provided over the array and comprises a parallax barrier or a lenticular lens comprising lenticular elements, wherein a front side of the transparent plate faces the viewer and a back side of the transparent plate faces the array of pixels;
• and (ii) has light refraction properties that cause the viewer to perceive distortion and/or displacement of a three-dimensional image that is displayed by the display device;
• wherein the method comprises:
• determining the viewing position of the eyes of the viewer relative to the autostereoscopic display device using the eye tracking system;
• providing three-dimensional image data;
• weaving the three-dimensional image data to the array of pixels, which weaving comprises selecting pixels that produce pixel output for the left image and pixels that produce pixel output for the right image taking into account the viewing position of the eyes of the viewer relative to the autostereoscopic display device;
• and
• controlling the selected pixels accordingly to display, to the viewer, the three dimensional image;
• wherein the method cancels the perceived distortion and/or displacement, caused by the transparent plate, of the three-dimensional image that is displayed by the display device, taking into account the refraction properties of the transparent plate, the position of each pixel relative to the transparent plate and the viewing position of the eyes of the viewer relative to the autostereoscopic display device,
• wherein a modification is made to the selecting of pixels during the weaving, the modification comprising attributing a particular pixel output of a selected pixel at a first position in the array to a different pixel at a second position in the array, taking into account the refraction properties of the transparent plate, the position of each pixel relative to the transparent plate and the viewing position of the eyes of the viewer, so that the viewer perceives that the particular pixel output comes from the first position in the array, while in reality it comes from the second position in the array, which allows the viewer to perceive the three-dimensional image with a proportion and position that correspond to those contained in the three-dimensional image data,
• wherein for a group of pixels an interpolation is made to determine the modification to the selecting of pixels by calculating the modification for a selection of pixels followed by an interpolation to determine the modification for pixels that are not part of the selection.

A method for cancelling distortion and displacement of a three-dimensional image that is displayed to a viewer by an autostereoscopic display device, the distortion and displacement being perceived by the viewer, wherein the autostereoscopic display device comprises:

• an eye tracking system for determining the position of the eyes of the viewer relative to the autostereoscopic display device;
• and
• a display portion configured to display a composite three-dimensional image composed of a left image to be viewed by a left eye of the viewer and a right image to be viewed by a right eye of the viewer, the display portion comprising:
• an array of pixels for producing a display output wherein each pixel is capable of producing a pixel output;
• and
• a transparent plate, which (i) is provided over the array and comprises a parallax barrier or a lenticular lens comprising lenticular elements, wherein a front side of the transparent plate faces the viewer and a back side of the transparent plate faces the array of pixels;
• and (ii) has light refraction properties that cause the viewer to perceive distortion and/or displacement of a three-dimensional image that is displayed by the display device;
• wherein the method comprises:
• determining the viewing position of the eyes of the viewer relative to the autostereoscopic display device using the eye tracking system;
• providing three-dimensional image data;
• weaving the three-dimensional image data to the array of pixels, which weaving comprises selecting pixels that produce pixel output for the left image and pixels that produce pixel output for the right image taking into account the viewing position of the eyes of the viewer relative to the autostereoscopic display device;
• and
• controlling the selected pixels accordingly to display, to the viewer, the three dimensional image;
• wherein the method cancels the perceived distortion and/or displacement, caused by the transparent plate, of the three-dimensional image that is displayed by the display device, taking into account the refraction properties of the transparent plate, the position of each pixel relative to the transparent plate and the viewing position of the eyes of the viewer relative to the autostereoscopic display device,
• wherein the three-dimensional image data are first modified into modified three-dimensional image data, taking into account the refraction properties of the transparent plate, the position of each pixel relative to the transparent plate and the viewing position of the eyes of the viewer, so that the weaving is performed using the modified three-dimensional image data and the viewer is allowed to perceive the three-dimensional image with a proportion and position that correspond to those contained in the unmodified three-dimensional image data,
• wherein cancelling the perceived distortion and/or displacement of the three-dimensional image comprises the steps of:
• defining a refraction model for the display portion, which refraction model has at least one variable for the position of each pixel relative to the transparent plate, at least one variable for the viewing position of the eyes of the viewer relative to the autostereoscopic display device, at least one variable for characterizing the transparent plate and parameters related to these variables;
• then
• determining the at least one variable for the position of each pixel relative to the transparent plate and the at least one variable for characterizing the transparent plate;
• then
• using the refraction model to modify the three-dimensional image data to yield the modified three-dimensional image data, which comprises feeding the model with the viewing position of the eyes of the viewer obtained with the eye tracking system.