Method for the representation of a three-dimensional scene on an auto-stereoscopic monitor

Patent metadata

Field	Value
Publication number	US-10368048-B2
Application number	US-201715408100-A
Country	US
Kind code	B2
Filing date	Jan 17, 2017
Priority date	Jul 15, 2014
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

An auto-stereoscopic monitor and method for the presentation of a three-dimensional scene on an auto-stereoscopic monitor, wherein a number of basic images of a scene is predefined, b) an image mask is predefined for each of the basic images, c) the individual basic images are weighted pixel by pixel or subpixel by subpixel with the values of the respectively associated image mask and are then added to form a raster image, d) the determined raster image is displayed on the screen of the auto-stereoscopic monitor, e) a current normal distance of the viewer from the monitor is determined, and f) a stretch factor is determined as a function of the determined current normal distance and a nominal distance off the screen, wherein the image masks are stretched or compressed in the direction of the horizontal image axis as a function of the stretch factor.

First claim

What is claimed is:

1. A method for representing a three-dimensional scene on an auto-stereoscopic monitor, the method comprising:
a) displaying a number N of basic images which respectively show an image to be displayed from different viewing angles;
b) providing an image mask for each of the basic images, each with a size of a native screen resolution of the auto-stereoscopic monitor or of a subregion of the auto-stereoscopic monitor;
c) determining a current normal distance of an observer from the auto-stereoscopic monitor normal to a screen plane of the auto-stereoscopic monitor;
d) determining a stretching factor as a function of the current determined normal distance;
e) weighting the basic images according to pixel or sub-pixel with the values of the respective image mask assigned to them and subsequently adding to a raster image;
f) displaying the raster image on a screen of the auto-stereoscopic monitor;
g) stretching or compressing the image masks in the direction of a horizontal image axis as a function of the stretching factor by means of interpolation, wherein the stretched or compressed image mask has the same resolution and width as the image mask before being stretched or compressed;
h) horizontally centering the stretched or compressed image masks, so that the horizontal center of the stretched or compressed image masks coincides with the horizontal center of the image mask before being stretched or compressed; and
wherein:
a number of optical elements are assigned to an image line of the screen;
color and/or brightness values originating from each basic image are projected to a respective projection point via a respective optical element; and
a distance between two adjacent projection points, on a straight line at the current normal distance to the screen, corresponds to a respective distance between a respective two adjacent projection points on a straight line at the nominal distance to the screen.

2. The method according to claim 1 , wherein step c) is repeated at a predetermined updating time, and steps d), g) and h) are repeated if a change in the determined current normal distance is detected.

3. The method according to claim 1 , wherein a video data structure is provided for a representation of moving three-dimensional scenes, wherein the N basic images of the scene are available for each of a plurality of points in time, and at least the steps b), e), f), and h) are executed for each time point.

4. An auto-stereoscopic monitor for displaying a three-dimensional scene, which is provided as a number of basic images which respectively show the scene to be displayed from different viewing angles, the auto-stereoscopic monitor comprising:
a memory for storing an image mask for each of the basic images, each of the image masks associated with a size of a native screen resolution of the auto-stereoscopic monitor, or of a partial area adapted to the auto-stereoscopic display window thereof;
a weighting unit adapted to specify a number of basic image masks;
a screen for displaying a raster image;
optical elements which, when using a basic image mask, respectively map a light originating from the basic images to points on a straight line;
a detection unit for determining a current normal distance of an observer from the auto-stereoscopic monitor normal to an image plane of the auto-stereoscopic monitor; and
an updating unit which determines a stretching factor as a function of the normal distance and a nominal distance when the normal distance of the observer changes, wherein the image masks are stretched or compressed in the direction of the horizontal image axis as a function of the stretching factor;
wherein the weighting unit is adapted
to weight the individual basic images according to sub-pixels with the values of the respective image mask assigned to them and then adds them, and to stretch compress the image masks in the direction of the horizontal image axis as a function of the stretching factor by means of interpolation of the image mask, wherein the stretched or compressed image masks have the same resolution and width as the image mask before being stretched or compressed;
to center the stretched or compressed image masks horizontally, so that the horizontal center of the stretched or compressed image masks coincides with the horizontal center of the image mask before being stretched or compressed; and
wherein the distance between two adjacent projection points on a straight line at the current normal distance from the screen, corresponds to a distance between two respective adjacent projection points on a straight line at the nominal distance from the screen.

Assignees

• Novomatic Ag

Inventors

• Kugler Andreas

Classifications

• H04N13/122 Primary

  Improving the three-dimensional [3D] impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues (H04N13/128 takes precedence) · CPC title

• H04N13/373

  for tracking forward-backward translational head movements, i.e. longitudinal movements · CPC title

• H04N13/30

  Image reproducers (optical systems for producing stereoscopic or other three-dimensional [3D] effects G02B30/00) · CPC title

• H04N13/324

  Colour aspects · CPC title

• H04N13/366

  using viewer tracking · CPC title