EP4046377A1 - Verfahren zur kalibrierung eines systems mit stereoskopischem 3d-display - Google Patents
Verfahren zur kalibrierung eines systems mit stereoskopischem 3d-displayInfo
- Publication number
- EP4046377A1 EP4046377A1 EP20792935.7A EP20792935A EP4046377A1 EP 4046377 A1 EP4046377 A1 EP 4046377A1 EP 20792935 A EP20792935 A EP 20792935A EP 4046377 A1 EP4046377 A1 EP 4046377A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- zone
- camera
- zones
- partially covered
- detection object
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/327—Calibration thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
- H04N13/31—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0693—Calibration of display systems
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
- G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
Definitions
- the invention relates to a method for calibrating a display system according to the preamble of claim 1.
- Calibration methods for display systems are known in which a test image is mapped onto a detection object, the detection object having a first and a second reference zone, in each of which a camera is arranged in order to detect the image mapped by the display device for calibration of a barrier layer .
- Such calibration methods are used for display systems that display 3D images, with a first and a second eye capturing / seeing different images.
- the invention has set itself the task of proposing a method which enables a simple and / or inexpensive and / or precise calibration of a display system.
- relatively light / relatively dark are understood to mean, in particular, essentially illuminated / essentially not illuminated.
- the invention is based in particular on the idea that in the course of
- a method for calibrating a display system comprising a display device, having a display layer which has controllable display points, and a barrier layer or a
- Parallax barrier layer which has controllable barrier cells, by means of which display points of the display layer can be concealed
- the system also includes at least one first camera, an electronic one Control unit and a detection object
- the display device sending out a first test image with a test pattern, in which the barrier layer covers part of the test image by means of a barrier pattern, so that a partially covered test image is imaged on the detection object with regard to at least two reference zones of the detection object, the Test pattern and the barrier pattern generate light and dark zones of the partially covered image
- the first camera capturing the partially covered test image on the detection object with regard to its coverage and / or positioning with relatively light and relatively dark zones of the partially covered test image on the two reference zones of the detection object, after which the Control of the barrier layer is calibrated.
- the first test image with the test pattern is preferably provided by the display dots of the display layer in such a way that the first test image has alternating light and dark display dots for test purposes.
- the control and calibration of the display device is preferably carried out in the ECU, which stands for electronic control unit.
- the display device is preferably designed in such a way that it can provide different images for a right and a left eye, as a result of which a three-dimensional image is generated.
- the barrier cells are preferably each controllable in such a way that they are translucent or opaque.
- the calibration or any calibration values are preferably stored in the ECU, which in particular is integrated into the display device.
- the method is expediently carried out after the production of the display device and / or display system or parts thereof, in particular at the end of the line.
- the at least one calibration value is used expediently in later operation or normal operation of the display device and / or display system or parts thereof.
- a calibration value is calculated in the electronic control unit, which shifts the barrier pattern of the barrier layer so that the partially covered image on the detection object images a relatively bright zone on the first reference zone and a relatively dark zone on the second reference zone.
- test pattern has perpendicular, parallel, relatively light and relatively dark zones and the barrier pattern has perpendicular, parallel covered and uncovered areas.
- the calibration is designed in such a way that a relatively bright zone of the partially covered test image is essentially completely imaged on the entire first reference zone and / or the first reference zone is essentially completely covered and that a relatively dark zone of the partially covered test image on the entire second reference zone is substantially completely mapped and / or the second reference zone is substantially completely covered.
- the calibration is preferably designed such that the width of the first and second reference zones, which is formed along the direction of a connecting line between the first and second reference zones, is completely, relatively brightly illuminated, the first reference zone and the second reference zone is completely dark.
- the first camera or a second additional camera detects the position of the first and the second reference zone and makes it available to the electronic control unit, the first camera covering the first and the second reference zone with regard to their width by a relatively bright and relatively dark image of the partially covered test image is recorded, after which the electronic control unit calculates the calibration value.
- the detection object is preferably designed as a model head or model projection surface and in particular does not have its own camera, the detection object having the first and second reference zones, the reference zones being in particular each designed as essentially round or circular or oval surfaces which are particularly preferred for exemplary detection as / instead of a human eye are suitable.
- the detection object very particularly preferably has further face patterns or face pattern zones, for example for a nose and / or a forehead, for example.
- the second camera is designed as an infrared camera and the first camera or the only, first camera is designed as a camera which is designed mainly or exclusively for the visible light spectrum.
- the detection object is shifted along the direction of a connecting line between the first and second reference zone, after which the first camera or a second additional camera is again the position the first and the second reference zone and provides the electronic control unit, the first camera detecting the coverage of the first and the second reference zone in terms of their width by a relatively light and relatively dark image of the partially covered test image, after which the electronic control unit calculates the calibration value, in particular a new calibration value, alternatively, a previous and a new calibration value are offset against one another.
- control of the barrier layer is calibrated by checking in a test step whether a relatively bright zone of the partially covered test image is essentially completely imaged on the entire first reference zone and / or essentially completely covers the first reference zone and that a The relatively dark zone of the partially covered test image is essentially completely imaged on the entire second reference zone and / or the second reference zone essentially completely covers, after which, if the overlap of the two reference zones by the relatively light zone on the one hand and the relatively dark zone on the other hand is not complete in terms of the width of the reference zones and the result of the test step is therefore negative, the barrier layer is then by a defined amount Is shifted away, along the direction of a connecting line between the first and second reference zone, after which this test is carried out again and the shift and test is carried out until the result of the test step is positive.
- the invention also relates to a display system which is designed to be suitable for carrying out the method.
- FIG. 3 shows an alternative exemplary embodiment, with the essential difference from that from FIG. 2 that an additional camera is used, and also
- FIG 4 shows the image of a partially covered test image on a detection object with regard to the first and second reference zones.
- FIG. 1 illustrates, by way of example, a display layer 11 with the controllable display points 111 and, next to it, a barrier layer 12 which has controllable barrier cells 121, by means of which display points 111 of the display layer 11 can be concealed.
- the upper eye of a viewer 8 only sees the dark zones and the lower eye of the viewer 8 only sees the light zones, im exemplary case of testing.
- the pattern captured by the respective eye of the viewer 8 depends on its position relative to the barrier layer 12.
- FIGS. 2 and 3 each illustrate an exemplary embodiment of an arrangement or a system for the method.
- the system comprises a first camera 2, an electronic control unit 3 and a detection object 4.
- the display device 1 or display has a display layer 11, which comprises controllable display points 111 or image cells, and a barrier layer 12, which has controllable barrier cells 121, by means of which display points 111 of the display layer 11 can be concealed.
- the display device 1 generates a first test image 5 with a test pattern, in which the barrier layer 12 covers part of the test image by means of a barrier pattern, so that a partially covered test image is imaged on the detection object 4, for example a head of a schematic viewer.
- This mapping onto two reference zones 41, 42 of the detection object 4 results in light and dark zones of the partially covered image for the test pattern caused by the barrier pattern 12, 121.
- the image provided by the display dots 111 of the display layer for test purposes comprises alternating light and dark display dots 111.
- the first camera 2 detects on the detection object 4 with regard to its coverage and / or positioning with relatively bright 51 and relatively dark 52 zones of the partially covered test image on the two reference zones 41, 42 of the detection object 4, as also specifically illustrated by way of example with reference to FIG. 4 .
- additional camera 6 detects the eye position or reference zones 41, 42 of the detection object 4, this information being processed in the ECU.
- the first camera 2 has a unit for example in FIG Detection of the light and dark zones or areas as well as a unit for comparing these areas with the eye positions or the two reference zones 41, 42 of the detection object 4.
- FIG. 2 an exemplary embodiment is now illustrated which, in contrast to that from FIG. 3, has only a single first camera 2, by means of which both the eye positions or the two reference zones 41, 42 of the detection object 4 are recorded as well as additionally the light and dark stripes or the light and dark zones of the partially covered image are detected on the two reference zones 41, 42 of the detection object 4.
- First camera 2 in FIG. 2 or additional camera 6 from FIG. 3 is responsible for the information for controlling the barrier layer 12, for example, and captures light and dark zones on the reference zones 41, 42 Barrier cells or the barrier pattern is adapted until one reference zone is essentially completely dark and the other reference zone is essentially completely brightly illuminated.
- the test procedure is used to test and calibrate the geometry of the structure.
- the tolerance or inaccuracies between the display layer and the barrier layer with regard to the relative positioning of the pixels of these two layers are compensated for.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019007146 | 2019-10-15 | ||
PCT/EP2020/078371 WO2021074019A1 (de) | 2019-10-15 | 2020-10-09 | Verfahren zur kalibrierung eines systems mit stereoskopischem 3d-display |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4046377A1 true EP4046377A1 (de) | 2022-08-24 |
Family
ID=72915802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20792935.7A Withdrawn EP4046377A1 (de) | 2019-10-15 | 2020-10-09 | Verfahren zur kalibrierung eines systems mit stereoskopischem 3d-display |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP4046377A1 (de) |
WO (1) | WO2021074019A1 (de) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2306826A (en) * | 1995-10-18 | 1997-05-07 | Sharp Kk | Display, method of calibrating an observer tracking display and observer tracking autostereoscopic 3D display |
-
2020
- 2020-10-09 EP EP20792935.7A patent/EP4046377A1/de not_active Withdrawn
- 2020-10-09 WO PCT/EP2020/078371 patent/WO2021074019A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
WO2021074019A1 (de) | 2021-04-22 |
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