EP2116067A1 - Stéréoprojection à filtres d'interférence - Google Patents

Stéréoprojection à filtres d'interférence

Info

Publication number
EP2116067A1
EP2116067A1 EP07846350A EP07846350A EP2116067A1 EP 2116067 A1 EP2116067 A1 EP 2116067A1 EP 07846350 A EP07846350 A EP 07846350A EP 07846350 A EP07846350 A EP 07846350A EP 2116067 A1 EP2116067 A1 EP 2116067A1
Authority
EP
European Patent Office
Prior art keywords
color
intervals
stereo
perspective
transmitting
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Withdrawn
Application number
EP07846350A
Other languages
German (de)
English (en)
Inventor
Helmut Jorke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Infitec GmbH
Original Assignee
Infitec GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Infitec GmbH filed Critical Infitec GmbH
Publication of EP2116067A1 publication Critical patent/EP2116067A1/fr
Withdrawn legal-status Critical Current

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
    • H04N13/363—Image reproducers using image projection screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/106—Processing image signals
    • H04N13/144—Processing image signals for flicker reduction
    • 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
    • H04N13/324—Colour aspects
    • 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
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/334—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using spectral multiplexing
    • 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
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • 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
    • H04N13/398—Synchronisation thereof; Control thereof

Definitions

  • the invention relates to methods for stereoscopic reproduction of images, video clips, films, etc., or to a stereo projection system for carrying out such a method.
  • the anaglyph technique has long been known: through simple red / green separation of the two left / right partial images and observation of the summation image by means of filter glasses f which allow only the red or the green color component for each eye, a stereoscopic image is created for the observer Impression.
  • the green color is assigned exclusively to the left and the red color exclusively to the right field, disadvantageous is the system-related color filtering, so that no realistic color images can be reproduced with this technique.
  • Another method that is occasionally used on television is the PuIfrich method.
  • spectacles are used for viewing, but the beam path is darkened more for one eye than for the other.
  • color glasses are also often used (for cost reasons), although it depends only on the different ⁇ bdunklung. Due to the different brightness, the visual information is easy Delays to the processing areas of the brain. If an illustrated scene moves at a right angle to the viewer, the temporal delay of the perception of an eye causes parallax and the scene is spatially perceived.
  • the advantage of this technique is the simplicity of the rendering technique.
  • the disadvantage is that the scene must be constantly in motion, which is often felt after some time as unpleasant.
  • the scene must always move in the same direction, otherwise the depth information would be reversed, and the movement speed must be kept constant, otherwise the depth information is not reproduced correctly.
  • the right / left portions are separated by so-called shutter glasses that pass through electrically switchable polarizing filter, the light, eg from a monitor or projector, alternately only for the right or left eye of the beholder.
  • the shutter glasses are synchronized with the playback device (eg monitor), so that only the respective partial images reach the left or right eye from the alternating sequence of left / right partial images shown there.
  • the constant left / right blanking requires a very high refresh rate (at least 120-160Hz) so that a disturbing flicker effect is suppressed.
  • Another principle is based on the interference filter technique.
  • a method for producing an optically three-dimensionally perceptible image reproduction using the interference filter technique or a corresponding stereo projection system is known from DE 199 24 167 B4.
  • Two interference filters with slightly different spectral filter effect are used for the projection.
  • Each filter has three narrow passbands (trans mittent intervals) for the primary colors blue, green and red.
  • the width of the passbands is chosen in the range of 20 nm.
  • the passage areas of the two filters are arranged offset from each other so arranged that they show no overlap and thus formed orthogonal to each other.
  • two separate perspective partial images one for the left eye and one for the right eye, can be realized with the aid of which a three-dimensional perceptible image can be projected onto a screen.
  • This image is selectively perceived by a viewer through the separated eyes by having spectacles whose left lens shows a filter characteristic corresponding to the one interference filter and the right lens shows a filter characteristic corresponding to the other interference filter.
  • the two perspective partial images on the screen can be safely separated from one another eye-specifically and produce the stereo effect or the three-dimensional effect of the images on the viewer.
  • the known prior art is characterized in that the optical components for generating or for detecting the left or the right Perspektivteilers are each realized identically. That is, for generating or detecting the left perspective partial image In each case the same optical polarization, the same optical frequency distribution and / or the same temporal activity control is used for the generation or for the acquisition of the respective partial image. In contrast, a different and complementary optical or temporal property is selected for generating or for detecting the other right perspective partial image in order to enable a secure and reliable separation of the two perspective partial images (channel separation).
  • the present invention has for its object to develop a method for stereo projection systems or to provide a stereo projection system, which shows a good color reproduction, a reliable perspective Colourierentren- tion with low flicker and also shows a simple structure, which proves to be robust.
  • the object is achieved by the method having the features according to claim 1 and a stereo projection system having the features of claim 6.
  • the invention is characterized in that the color filters for the two perspective partial images either for image formation or image acquisition are designed so that the number b of the transmitting intervals compared to the known prior art numerically (a) are reduced, whereas the other color filters for the two perspective partial images are typically equal to 6 (a) and structurally different.
  • the invention shows for exactly one side of the system either for imaging or image capture a reduced number b of transmitting intervals for the two compared to the number (a) of the other side Perspective partial images which are smaller than 6 (a), especially 5 or 4 (b).
  • at least one transmissive interval exhibits an arrangement in the range of two color perceptions of blue (B), green (G) or red (R).
  • the other transmitting intervals are arranged in the frequency spectrum such that they are arranged in the region of a single color perception, ie blue or green or red.
  • transmissive intervals for color perception preferably exhibit a bandwidth in the range of about 30 nm or noticeably below that, allowing for secure demarcation and placement within a range of color perception, and for safe separation from the other transmissive intervals.
  • the transmitting intervals are arranged so that they have a sufficient distance from each other.
  • the formation of the stereo projector can be simplified with a corresponding embodiment of the filter according to the invention for the inventive method or the stereo projection system, since by this training, a reduction of very high frame rates for a realized example as Dreichip DLP projector projector with replaceable Separation of the two perspective partial images is possible. This is with a noticeable reduction the burden on the imaging units, and thus an improvement in the life of the projector.
  • At least one transmitting interval in such a way that it is permeable in the region of two color perceptions makes it possible to increase the image brightness available for projection and image reproduction, and thereby to create the possibility of using suitable electronic color correction circuits To provide reliable and natural color composition of the reproduced perspective partial images and thus of the three-dimensionally perceivable stereo image.
  • the interference filters of the lenses are not identical to those of the interference filter units of the image-forming components of the system but rather structurally different and thus at most only in accordance with each other form.
  • differences in the manufacturing quality or in the design can be purposefully used or used to ensure that certain advantageous projection or presentation situations can be achieved.
  • a combination of the filters in the stereo projector and in the spectacle (s) which differ from one another in the corresponding filters by a permutation of individual limited transmitting intervals, reduce the frame rate of the stereoprojector without a unpleasant flickering of the stereo images is perceptible.
  • the stereoprojection system described below has been found to be particularly preferred.
  • an exchange of two transmitting intervals between corresponding interference filters (right side opposite left side and right perspective partial image opposite left perspective partial image) within a color, that is within a color perception is carried out, wherein additionally at least one merger of two adjacent, transmitting intervals to a common transmissive interval that extends over two color perception areas.
  • the sum of the transmitted spectral intervals in the interference filter of the stereo projector is reduced, for example, from 6 to 5.
  • an exchange of the assigned color image data to be displayed is now carried out in accordance with the permutation of the transmitting intervals.
  • This improved design of the stereo projection system makes it possible to reduce the undesirably high frame rate of the stereo projector, which places a significant burden on the components of the stereo projector, thereby increasing the lifetime of the components of the projector.
  • the outer blue transmitting interval or the outer red transmitting interval as an upwardly or downwardly open interval, so typically beyond the visible through the human area or as broad with a little steeply sloping edge trained, transmittie - To realize rendes interval and thereby in turn provide for increased brightness. With this additional brightness, it is possible to achieve improved color perception through electronic measures.
  • the filter with the two transmissive areas shows a reduced number of transmissive intervals, which accordingly have a significantly reduced number of edges, ie edges for the transmission areas of the transmitting areas Intervals, ie 4 pieces instead of 6 pieces in the prior art, shows.
  • This reduction provides a significant simplification of the filter characteristics and allows the cost-effective and simpler design of the filter without this, which is surprising, has a significant effect on the quality of color reproduction.
  • the steepness of the flanks of the Transmitting intervals represents a quality-determining measure of the filter in particular the interference filter, which in turn has a massive impact on the cost of the filter.
  • the filter in particular the interference filter with fewer edges on the one hand by the inventive reduction of the number of transmitting intervals and on the other by the ability to provide open transmitting intervals in the edge region of the outer color perception areas, in particular with gently sloping edges in the outer region of these transmitting intervals,
  • each filter for a perspective partial image shows a transmitting interval, which is arranged in the region of two color perceptions.
  • These transmissive intervals comprise either the two color perceptions blue and green or the two color perceptions green and red.
  • These transmissive intervals show a mean bandwidth of more than 30 nm.
  • the other two transmitting intervals, one each of the two perspective partial images and thus one each Filter is assigned to a single Color perception namely blue or red assigned.
  • the transmitting intervals are selected such that each filter or each perspective partial image receives color information for each color perception region red, blue, green.
  • the outer transmissive intervals may be formed as open transmitting intervals.
  • the number of edges or the number of edges on the one hand by the reduction of the number of intervals and on the other hand by the provision of open edge intervals further reduce and thereby create the possibility of simpler, cheaper filters, which in particular as a Fabri-Perrot filter are realized to use to create a stereo projection system according to the invention.
  • this embodiment of the transmitting intervals has created the possibility of generating a particularly natural color perception by means of electronic color correction circuits.
  • the stereo glasses of which different numbers are provided depending on the number of persons who want to use the stereo projection system at the same time, are provided with spectacle lenses which show interference filters.
  • the optical properties of the lenses are chosen so that they preferably structurally differ from the corresponding interference filter units in the optereoharmor.
  • the invention is based on a method for generating an optically three-dimensionally perceptible image reproduction according to the known interference filter technology or a known corresponding Stereoêtionssyste ⁇ i characterized in that the color filter for image generation, ie in a stereo projector or in a stereo display, etc., compared to those color filters for image acquisition by means of the stereo glasses structurally different formed by different numbers of transmitting intervals are selected.
  • the number a of the one number is selected to be 6, in particular, as in the prior art, while the other number b is chosen to be smaller than a and thus in particular smaller than 6.
  • the reduction of the intervals is achieved, for example, by swapping (permuting) two narrow transmitting intervals in the range of a color perception blue (B), green (G) or red (R) right-left and then one of them with an adjacent transmitting interval is connected to a single wide interval, whereby a single is created in two color perceptions blue (B), green (G) or red (R) utilizateckendes transmitting interval.
  • the image data associated with the pairwise right-left (permutated) intervals are additionally reversed right-left during image generation, so that a secure and reliable separation of the stereoscopic perspective fields for the left and right eyes is possible and also the flickering tendency the system is reduced in the sequential playback of the individual color image data.
  • the system of the invention shows a simple, robust and inexpensive construction.
  • 1 a is a schematic representation of a stereoprojection system according to the invention
  • 1 b is a schematic representation of another stereoprojection system according to the invention.
  • 3 shows an exemplary spectral distribution of the transmitting intervals of two interference filters according to the invention 4 shows a further exemplary spectral distribution of the transmitting intervals of two inventive interference filters
  • Fig. 6 a shows a spectral distribution of the prior art transmitting intervals for the stereo glasses and the stereo projector b, a temporal sequence of the projected and perceived color image data according to the prior art for the stereo glasses and the stereo projector
  • FIG. 7 shows a spectral distribution of the transmitting intervals according to an exemplary stereo projection system according to the invention for a stereo eyepiece and a stereo projector
  • FIG. 8 shows a temporal sequence of the projected and perceived color image data of an exemplary stereo projection system according to the invention
  • FIG. 9 shows a further spectral distribution of the transmitting intervals according to an exemplary stereo projection system according to the invention for a stereo eyepiece and a stereo projector
  • FIG. 1 a shows the key component of the stereo projection system according to the invention for producing an optically perceptible three-dimensional image reproduction, namely the stereo projector 10.
  • This stereo projector 10 projects the image data supplied thereto onto a screen 20 by converting the stereo image data in the stereo projector 10 into perspective partial images and onto the screen 20 be projected.
  • the two separate perspective partial images which together represent the stereo image and represent a three-dimensional perceptible image. This is perceived by the viewers, who are equipped with a stereo goggles 30.
  • the two perspective partial images are separated from each other and differentiated from each other supplied to the left or the right eye of the beholder with the help of the stereo glasses 30 and the lenses located therein. The viewer thus perceives the two stereoscopically differentiated perspective partial images and thus has the perception of a three-dimensional structure.
  • the stereo projector 10 shows in a housing all the important components for the projection of perspective partial images and an integrated color correction circuit 15.
  • a light source 11 is realized in the form of a short arc lamp, the emitted light of an imaging unit 12, which is implemented as an LCD chip supplied becomes.
  • the imaging unit 12 is controlled with the stereo image data respectively with the perspective partial image data assigned to it so that the desired perspective partial image is generated from the broadband light supplied to it by the light source 11 and fed to the projection optics 14 and subsequently to the screen 20.
  • the stereo projector 10 furthermore has an additional interference filter unit 13a or 13b for each perspective partial image.
  • the arrangement of the interference filter unit 13a between the light source 11 and the imaging unit 12 provides a very robust and compact unit, while the alternative arrangement of the interference filter unit 13b in front of the projection optics 14 is a very flexible and less robust and compact arrangement.
  • the color correction circuit 15 integrated in the stereo projector 10 is connected to the image data source, which is not shown, for the stereo image data, and corrects the stereo image data supplied thereto, particularly in terms of color and brightness, by selecting the transmitting intervals (passages ) of the interference filter units 13a, 13b are reduced or substantially canceled.
  • the color correction circuit ensures that the differences in brightness and the other color distortions due to the different transmission properties due to the different transmitting intervals of the different interference filter units 13a or 13b are largely or completely corrected for the different perspective partial images. Disturbances due to the projection optics 14 or the light sources 11 used are additionally corrected. This makes it possible to project a very balanced, color-neutral stereo image, which allows the viewer a very pleasant viewing and thus allows a three-dimensional perception reliably and in a pleasant way.
  • the interference filter units 13a, 13b are Fabrice-Perrot interference filters each showing a filter characteristic formed orthogonal to each other.
  • 2 shows a known filter characteristic of the two interference filter units once for the left eye and thus for the one perspective partial image and once for the right eye and thus for the other perspective partial image, which are orthogonal to one another and thus do not show any mutual overlap
  • the illustrated transmissive intervals B1, B2, G1, G2, R1 and R2 show no overlap and are spaced apart so that the two perspective partial images are reliably separated from one another. can be given.
  • the individual transmitting intervals Bl, B2, Gl, G2, R1 and R2 are realized as very narrow-band transmitting intervals with a bandwidth of about 20 nm half-width, of which the two intervals Bl and B2 in the blue color perception area, the two intervals Gl and G2 are arranged in the green color perception area and the two intervals Rl and R2 in the red color perception area of the human eye.
  • the interval R2 represents an outer and an open transmitting interval which has a steep edge and has a much less steep, not shown edge, edge.
  • the one interference filter unit with the transmitting intervals Bl, Gl and Rl shows 6 distinct, steep edges, whereas the other interference filter unit with the transmitting intervals B2, G2 and R2 shows 5 steep, distinct edges and flanks, respectively. These steep flanks are very difficult to manufacture and are responsible for the significant cost of this interference filter unit.
  • the arrangement of the three transmitting, narrow-band intervals the possibility is given to project a pretty colorful and pleasant stereo image.
  • FIG. 1 b shows another stereo projector 10 according to the invention at different projection times T 1 or T 2.
  • the stereo projector 10 shows in a housing all the important components for the projection of perspective partial images and an integrated color correction circuit 15.
  • the single light source 11 is realized in the form of a Kurzbogenlanape whose emitted light of a single imaging unit 12, which is implemented as a DMS chip, respectively .
  • the imaging unit 12 is provided with the stereo image data, respectively, with the perspective partial image data sequentially assigned thereto so controlled that the desired perspective partial image generated from the supplied broadband light of the light source 11 and the projection optics 14 and then the associated screen 20 is supplied.
  • the stereo projector 10 also has, for each perspective partial image, an exchangeable filter as interference filter unit 13c with two different mutually orthogonal interference filters, which are alternately inserted into the beam path depending on the representation of one or the other perspective partial image.
  • the arrangement of the interference filter unit 13c as a replaceable filter between the light source 11 and the imaging unit 12 provides a very robust and compact and inexpensive unit.
  • FIG. 3 shows a filter characteristic according to the invention of the two interference filter units 13a, 13b, in which a total of less than 6 transmitting intervals, namely only 5 transmitting intervals L21, L22, L23, R21 and R22, are realized.
  • the transmitting intervals L21, L22 and R21 are implemented as narrow-band, transmitting intervals in the blue perception region (L21 and R21) and in the green perception region (L22). These show a bandwidth of about 25 nm.
  • L21 shows a mean half width in the range of 425 to 450 nm
  • R21 a bandwidth of 450 to 485 nm as the half width and in the green perception range
  • the transmitting interval L22 shows a half width of 500 to 525 nm.
  • the transmitting interval R22 is not located in a single color perception area of the eye. Rather, it includes portions of the green and red sensing regions and extends over a wavelength range of 535 to 626 nm. Separated from and spaced apart, the transmissive interval extends L23 from a wavelength of 635 to over 690 nm and represents an open interval.
  • the two transmissive intervals R21 and R22 are assigned to the one perspective partial image for the right eye, while the three other transmitting intervals L21, L22 and L23 are assigned to the other perspective partial image and thus to the left eye.
  • This filter characteristic shows a reduced number of transmitting intervals and, moreover, a reduced number of steep edges or flanks.
  • the number of transmitting intervals is reduced to 5 in total, whereas the number of steep edges is reduced to 9 in total.
  • the cost of implementing this filter characteristic is significantly reduced, without this having a significant impact on the color rendering quality.
  • the increased brightness due to the broad design of the transmitting interval R22 offers the possibility of achieving increased brightness, which makes it possible to use a color correction circuit to a particular extent, thereby enabling an additional improvement of the color characteristics.
  • the color characteristic according to the invention is given by a kind of channel permutation, namely by a kind of exchange of the interval R 1 from the one perspective partial image into the other perspective partial image and the connection of R 1 to the interval G 2, whereas in return the transmitting interval R2 is assigned to the other perspective partial image.
  • the filter characteristic of FIG. 4 has arisen from the filter characteristic of FIG. 2, in which case the interval B 1 has been assigned to the other perspective partial image and, in turn, the interval B 2 has been connected to the interval G 1 for the sub-image 1.
  • the transmitting interval LIII extends over the two color perception ranges blue and green. Whereas the other intervals are always only in one color perception area.
  • the interval LIl shows a bandwidth of 460 to 525 nm and the interval RlI a bandwidth of 420 to 450 nm, while R12 shows a bandwidth of 535 to 565 nm and the interval L12 a bandwidth of 595 to 626 nm.
  • Interval R13 is provided as an open interval with a larger bandwidth extending beyond 635 to over 690 nm.
  • This filter characteristic is characterized by a reduction of the intervals and beyond by a significant reduction of the steep edges, which significantly reduces the effort to realize this filter characteristic.
  • FIG. 5 shows a further filter characteristic according to the invention, namely one with only four transmitting intervals, two of which extend over two color perception areas and the other two extend exclusively over a single detection area or are arranged therein.
  • the left eye interval L31 and the right eye interval R32 are associated with only one color perception area, namely, the blue color perception area and the red color perception area, respectively.
  • the interval L31 extends from below 420 to about 450 nm and R32 in the red color perception range of 635 to 50 nm. over 690 ran.
  • R32 represents a so-called open interval with a flat edge or a flat top edge in the region above 690 nm.
  • the other two intervals, which extend over two color perception areas, show an increased bandwidth.
  • Interval L32 covers both the green and red color perception areas and ranges in bandwidth from about 535 to 626 nm, whereas R31 extends beyond the blue and green color perception area and the 460 area to 525 nm.
  • This design of the filter characteristic of the two interference filters an orthogonal filter characteristic is given, which is characterized by a significantly reduced number of intervals, namely 4, and beyond a significantly reduced number of steep edges, namely a total of 7 is characterized, which is a very simple and very good filter characteristic to be produced. This filter characteristic is nevertheless able to allow a very pleasant color reproduction of the stereo projection system.
  • Fig. 6a the transmitting intervals of a stereo projector and an associated stereo eyeglasses according to the prior art are shown.
  • the stereo eyeglasses 6 show narrow, limited transmitting intervals Bl *, Gl *, Rl * and B2 *, G2 *, R2 *.
  • the interference filter units of the stereo projector also show 6 at the aforementioned intervals identical transmitting intervals Bl, Gl, Rl and B2, G2, R2.
  • Fig. 6a the transmitting intervals of a stereo projector and an associated stereo eyeglasses according to the prior art are shown.
  • the stereo eyeglasses 6 show narrow, limited transmitting intervals Bl *, Gl *, Rl * and B2 *, G2 *, R2 *.
  • the left perspective field image is reproduced with the image information Bl, Gl, Rl projected by means of the respective intervals.
  • no image or image information and thus no color image data is projected from the right perspective partial image.
  • no right perspective partial image is perceptible.
  • the right perspective partial image with the color image data B2, G2, R2, which are projected by means of their respective intervals is displayed, whereas in this period, the left perspective partial image is not displayed. Accordingly, only the right perspective partial image can be perceived by the right lens of the stereo glasses, whereas no information of the left perspective partial image can be perceived.
  • FIG. 7 shows, according to FIG. 5, a spectral distribution of the interference filter spectra according to the invention for the interference filters of the interference filter units of the stereo projector or the interference filters of the spectacle lenses of the stereo glasses.
  • the characteristic of the interference filters of the spectacle lenses of the stereo projection goggles shows 6 narrow intervals according to the prior art, whereas the intervals of the interference filters of the stereo projector are structurally different according to the invention and show only four transmitting intervals.
  • the interference filter of the stereo projector for the left perspective partial image shows a narrow interval Bl *, whereas the other interval due to a permutation of Gl * with G2 * by connecting the intervals G2 * with the interval Rl * represents a relatively wide interval
  • a connected interval Gl * with B2 * has arisen, which is supplemented by the single, narrow interval R2 *.
  • the connected intervals extend into two color perception areas.
  • Bl and Bl * or R2 and R2 * are largely identical, while other intervals differ structurally and substantially and at most correspond.
  • FIG. 8 shows the chronological sequence of the reproduced and recordable stereo image information or color image data for the left eye or the right eye of a stereo project system according to the invention, wherein a stereo projector according to FIG. 1b is used.
  • FIG. 8 is based on a spectral distribution of the transmitting intervals corresponding to FIG. 7 for the interference filter units in a stereo projector.
  • the color image data associated with the interval G2 are also permuted to the interval G1 and thus represented with the aid of the other interference filter unit, this leads to an alternating representation and thus possibility of perception of the color image data on the left eye or on the right Eye in which color image data for the green color perception region alternate with the color image data of the other color perception regions red and blue. This is due to the additional permutation of the color image data so that the left eye can only perceive information for the left eye, and similarly, this also applies to the right eye. It should be noted that according to the invention no permutation of the 6 intervals for the stereo glasses has taken place, whereby their optical properties correspond to the optical properties of the non-permuted interference filters of the interference filter units in the stereo projector. By the procedure described, it is possible to close the gaps in the reproduction for the respective eye from the prior art and thereby significantly limit the unwanted flicker.
  • This design of the stereo projection system also makes it possible to lower the frame rate without increasing the tendency to flicker or, if necessary, to increase the resolution of the stereo images to be displayed. Depending on the application, this can be done alternatively or in combination.
  • the relationship between the frame rate and the resolution is taken into account that the product of them represents the constant maximum bandwidth of the transmitted image data. Accordingly, for example, by decreasing the frame rate, the resolution can be increased.
  • the stereoprojection system described achieves a very comfortable and pleasant perception of stereo images, wherein the
  • Stereoimpulsionssystem also characterized by long lifetime and comfortable and cost-effective implementation.
  • FIG. 9 shows another solution according to the invention for a stereo projection system.
  • FIG. 9 shows the spectral distribution of the interference filter spectra for the interference filters of the interference filter units of the stereo projector or the interference filters of the spectacle lenses of the stereo glasses, corresponding to FIG. 6a.
  • the characteristic of the intervals of the stereo projector shows 6 narrow intervals according to the prior art, whereas the interference filters of the lenses of the stereo projection goggles show only four transmissive intervals.
  • the left lens shows a narrow interval Bl *, whereas the other interval is due to a permutation of Gl * with G2 * by connecting the intervals G2 * with the interval Rl *.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Projection Apparatus (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un système de stéréoprojection et un procédé de production d'une restitution d'image tridimensionnelle optiquement perceptible. A cet effet, pour chacune des deux images partielles en perspective (à gauche ou à droite) de l'image stéréo, des régions du spectre visible prédéterminées, différenciées par un filtre couleur, sont supprimées de telle façon que seuls des intervalles délimités du spectre sont transmis dans la région de perception du bleu (B), du vert (G) et du rouge (R). La position des intervalles transmis est choisie différemment pour les deux images partielles en perspective. Conformément à l'invention, le nombre des intervalles transmis pour les deux images partielles en perspective est, d'une part, sélectionné, soit pour la production d'images, soit pour la détection d'images, par les lunettes stéréo, inférieur à 6 (b) et, d'autre part, sélectionné égal à 6 (a). Dans le cas du nombre réduit (b), au moins un intervalle transmis pour l'une des images partielles en perspective est sélectionné en transmission dans une région de deux perceptions couleur bleu (B), vert (G) ou Rouge (R), ceci étant obtenu par permutation droite-gauche et combinaison subséquente avec un intervalle voisin. En correspondance avec les intervalles permutés, les données image correspondantes sont permutées de façon analogue. On parvient ainsi à réduire notablement la dépense pour les filtres, en particulier pour les filtres d'interférence pour ce système de stéréoprojection, éventuellement pour le procédé de production d'une restitution d'image tridimensionnelle optiquement perceptible, sans que la qualité de restitution d'image s'en trouve sensiblement atténuée. De plus, on parvient à réduire le scintillement indésirable.
EP07846350A 2006-11-19 2007-11-19 Stéréoprojection à filtres d'interférence Withdrawn EP2116067A1 (fr)

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DE102006054713A DE102006054713B4 (de) 2006-11-19 2006-11-19 Stereoprojektion mit Interferenzfiltern
PCT/DE2007/002088 WO2008061511A1 (fr) 2006-11-19 2007-11-19 Stéréoprojection à filtres d'interférence

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EP2116067A1 true EP2116067A1 (fr) 2009-11-11

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EP (1) EP2116067A1 (fr)
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DE (1) DE102006054713B4 (fr)
WO (1) WO2008061511A1 (fr)

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US20100066813A1 (en) 2010-03-18
DE102006054713B4 (de) 2012-08-30
WO2008061511A1 (fr) 2008-05-29
DE102006054713A1 (de) 2008-06-26
JP2010510532A (ja) 2010-04-02
JP5091246B2 (ja) 2012-12-05

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