WO1998046004A9 - Amelioration de la resolution d'image avec des appareils de reproduction d'image couleur et de prise de vues couleur - Google Patents

Amelioration de la resolution d'image avec des appareils de reproduction d'image couleur et de prise de vues couleur

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Publication number
WO1998046004A9
WO1998046004A9 PCT/DE1998/001033 DE9801033W WO9846004A9 WO 1998046004 A9 WO1998046004 A9 WO 1998046004A9 DE 9801033 W DE9801033 W DE 9801033W WO 9846004 A9 WO9846004 A9 WO 9846004A9
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WO
WIPO (PCT)
Prior art keywords
color
lines
image
additional
resolution
Prior art date
Application number
PCT/DE1998/001033
Other languages
German (de)
English (en)
Other versions
WO1998046004A2 (fr
WO1998046004A3 (fr
Filing date
Publication date
Priority claimed from DE1997114906 external-priority patent/DE19714906A1/de
Application filed filed Critical
Priority to AU82054/98A priority Critical patent/AU8205498A/en
Priority to EP98931897A priority patent/EP1016287A2/fr
Publication of WO1998046004A2 publication Critical patent/WO1998046004A2/fr
Publication of WO1998046004A3 publication Critical patent/WO1998046004A3/fr
Publication of WO1998046004A9 publication Critical patent/WO1998046004A9/fr

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Definitions

  • the invention relates to a method for improving the image resolution in color image display devices, in which each conventional elementary color point consists of a plurality of units, e.g. Triplex, formed color pixels and the elementary color points are arranged in column and rows, and a method for improving the image resolution in color image recording devices.
  • a major direction of enhancement is the immediate increase in pixel density, ie the number of pixels on the screen, which applies to all screen types, including the tube-based.
  • the transition to a larger resolution is associated with significant technological problems and therefore leads to a significant price increase, which also, as the experience in the market shows, is still disproportionate to the degree of resolution increase and the size of the screen diagonal.
  • Another possibility of increasing the image resolution is the introduction of a synchronous wobbulation.
  • the mode of operation of synchronous wobbulation in television is based on the following consideration: an electron beam of a picture tube is subjected to a high-frequency vertical displacement effect during its passage through a jump line raster. At this time, the phase of the shift in each field is changed, which ultimately means that the transmission of each picture is realized with four or even more field numbers.
  • the invention has for its object to develop a method for improving the image resolution for image reproduction and image acquisition, which allows an increase of the color dots with simple means and which is also feasible with the previous technique.
  • the color pixels of the additional color dots according to the invention are advantageously obtained by regrouping the existing color pixels by color pixels of different color from at least two adjacent and / or nearby conventional color dots also serve as color pixels of the additional color dots.
  • the color values to be displayed in the individual color centers of the additional color dots may be e.g. from known values of the environment can be determined by interpolation, including a larger environment.
  • the method according to the invention can be used for a wide variety of color displays, in particular for television sets, monitors, LED and LCD displays. It can be displayed with the same number of color pixels more color points than before. This is particularly advantageous in a miniaturization, as is necessary in the color miniature monitors in video cameras. Furthermore, large color displays can be made so that the usual resolution can be achieved with less luminous material. In particular, the method is also applicable to the color representation in the interlaced process and thus in television technology.
  • the additional color points of asymmetrical RGB controls of adjacent conventional color points are composed so that the color centers between the Columns appear alternately above and below the middle of the line.
  • the color centers between the columns and / or lines must be calculated interpolatively from the neighboring lines and columns (from the environment).
  • Basis of the invention is the recognition that representations on a RGB screen display sensory physiology are summarized as integral to color pixels that results in a meaningful, known from experience scene when the RGB neighborhoods allow this. Objectively possible unrealistic summary are suppressed sensesphysiologically.
  • a superposition image SA is generated in the RGB values by means of a suitable addition of the RGB values of the secondary images SA1, SA2, this superposition image SA can be superimposed RGB values on a visualization display D with physically because only the resolution for a secondary image SA1 or SA2 is perceived as being decomposed into color pixels to SA1 and SA2, as if it were the visualization of the original image OA.
  • RGB CCD Real images projected on an RGB CCD matrix are usually read out as they are then visualized on a raster display.
  • a symmetrical RGB readout strategy for the visualization process of virtual lines then allows a direct control of a raster display for visualizing virtual lines analogously to the image reproduction. It follows, among other things, that, for example, from physical, directly adjacent CCD lines Zi-2, Zi, Zi + 2, the RGB values are not line-oriented, but to some extent (virtual). can be read in such a way that their visualization does not represent the real display lines Zi-2, Zi, Zi + 2, but the (virtually) intervening lines Zi-1 and Zi + 1. takes.
  • the resolution of SA1 and SA2 in the RGB values are obtained, which is then perceived on a visualization display D with physically only the resolution SA the superposition image SA # (almost) decomposed into color pixels to SA1 and SA2, as if it were would act around the visualization of the original image OA.
  • Symmetrically applied to the process for image reproduction follows that, for example, the RGB values projected on a physical CCD line Zi are read out of the real line Zi in such a decomposed manner over the adjacent neighboring lines Zi-1 and Zi + 1 that the visualization of the (then re-encoded by a suitable superposition according to the visualization method in weighted RGB value summary) real line Zi not only the line Zi, but at the same time also the adjacent virtual lines Zi-1 and Zi + 1 perceives.
  • the present invention includes methods for forming the color dots (coding transformation) as well as methods for resolution enhancing representation (visualization transformation).
  • the coding transformation is a conversion (by rearrangement, multiple use, scaling ...) of the color points with the color point centers ZAi, which are picked up from the RGB points of the camera recording master and coded according to a standard method, into the corresponding - and / or possibly in new resolution-improving - RGB combinations for the rendering-side color centers Zwj of the visualization grid.
  • the visualization transformation is a conversion (by rearrangement, addition, scaling, etc.) of the incoming color points with the color point centers ZAi of the RGB-encoded RGB combinations into the corresponding - and / or possibly new resolution-improving - RGB combinations for rendering side (possibly virtual) color centers Zwj of the visualization grid.
  • the core idea of the visualization transformation is that a conventional visualization system can (virtually) realize a better image resolution than physically (real) is realized at raster resolution.
  • the core idea of the encoding transformation that is inverse to the visualization transformation is that this allows a conventional imaging system to (virtually) encode a better image resolution than physically realized via the raster resolution.
  • the inventive solution is independent of recording devices (raster cameras) and playback devices (raster displays) ) and concerns only methods for a suitable summary, _ ,. , PCT / DE98 / 01033 O 98/46004
  • the (virtual) resolution impression is equal to the doubling of the partial resolutions TA1, TA2, ie corresponds to the resolution OA of the original (exemplary embodiments see Appendices 4 and 5).
  • the interlaced and noninterlaced mode methods can be used to improve row resolution and / or column resolution.
  • interlaced mode is particularly suitable for TV, while for web pages, horizontal lines are flickered in the line interlaced method, and vertical lines in the column interlaced method flicker.
  • noninterlaced mode is suitable for both TV and web pages, as the full-screen method used here leads to flicker-free visualizations. Both methods can be used in combination for the TV playback, whereby in particular the improvement of the line resolution after interlaced mode and the improvement of the column resolution after noninterlaced mode can be realized. In both methods, it is assumed that the image information is provided to a preimage containing a larger number of picture elements arranged in columns and rows in matrix form than physically realized on the output device.
  • the RGB values of the color dots which can not be displayed directly on the output device, are encoded into the RGB values of adjacent lines and / or columns either subsequently (method according to (2)) or directly superimposed (method according to (3)) ("Visualization transformation").
  • Both methods allow a number of AM * to be additionally encoded from a preimage taken with a number AN of color points and rendered on an output device with only AM, AM ⁇ AN, color points ("visualization transformation "), so that a higher resolution in relation to the physical resolution of the output device image results from the summary of the color points AM with the color dots AM *.
  • Fig. 1 a color dot of the delta type
  • Fig. 2 a section of a delta-type color display
  • Fig. 3.1, 3.2 and 3.3 a section of a color display of inline type
  • Fig. 4.1a, 4.1b; 4.2a, 4.2b; 4.6a, 4.6b a diagram of the construction of images with additional color points, starting from images with conventional color points,
  • Fig. 5.1 a field A for 100 Hz television in the inline version
  • Fig. 5.3 the field A 'in the modified process with a variant of additional color dots
  • Fig. 6.1 and 6.2 a section of an LCD screen
  • Fig. 7a to 7f the additive formation of new lines from a high-resolution recording
  • Fig. 8c to 8f the additive formation of new columns for playback on a low-resolution output device
  • Fig. 9a to 9f the additive formation of new lines for playback on a flat screen
  • an elementary color point in color displays of the delta type consists of a pixel triplex of the colors red, green and blue (RGB), the center of which is centered in the center marked by an asterisk (*) RGB pixels that form a normal triplex lies.
  • RGB red, green and blue
  • Fig. 2 these are marked with a thick circle and their center is arranged with a (*) marked triplex in a color display section.
  • Fig. 6.1 shows a triplex arrangement in color LCD displays, where normally formed triplexes are again characterized by ellipses, at least in lines 1 and 2.
  • triangles and a rhombus in lines 1 to 4 indicate the variety of possibilities for forming additional triplexes, which can be achieved by regrouping the color pixels of conventional color points.
  • the arrangement of the additional triplexes in lines 1 and 2 makes it clear that this makes it possible to display obliquely running edges or lines without anti-aliasing, ie without the sawtooth effect due to the discrete arrangement of the pixels. Since the re-encoding of the luminance and chrominance signals is carried out before the image signal enters the reproduction unit (it could also be on the transmission side be made), the generation of additional triplexes of the specific control of the pixels or the LCD elements would be independent.
  • images of conventional color dots, formed from normal triplexes, and images from additional triplexes, which are based on a new combination of color pixels, have to be excited one after the other in rapid succession.
  • Figs. 4.1a to 4.6b The derivation of the images with additional color points and their diversity can be seen in Figs. 4.1a to 4.6b.
  • the centers of the excited triplexes are marked with a *, and the centers of the conventional, elementary color points are enclosed, as in Figs. 1 and 2, with a fully extended circle.
  • the images according to the Fig. 4.1a and 4.1b are created by the interlaced process, in which the conventional color dots (triplexes) are formed and energized in the hitherto conventional art. From the odd-numbered field with conventional color points according to Fig. 4.1a, five images with additional triplexes but different color centers can be derived by regrouping the color pixels of adjacent color points according to Figs.
  • the RB color pixels of the conventional color point 3.3 with the G color pixel of the conventional color point 5.3 and the G color pixels of the conventional color point 3.3 with the RB color pixels of the conventional color point 1.3 as shown in Fig. 4.3a additional triplexes with the color centers.
  • the color pixels are also controlled in the new summary in the usual way, the BRG excitation, however, adjusted so that adjusts the required color value in the new color centers.
  • this excitation scheme applies equally to inline picture tubes, color LC displays and to all displays in which multiple color pixels each produce one color point.
  • the color values generated by the superposition of the three basic colors (red, green and blue) and to be shown in the centers of gravity of the (new, additional) RGB triplets can be obtained in various ways:
  • the red pixels from the environment of the newly determined color point (averaging in the simplest case, smarter interpolation involving a larger environment, if necessary, the image obtained from it then subjected to a method for image enhancement / editing to achieve edge enhancement, etc.) so as to determine the intensity of the red pixel in the new triplex.
  • the RGB values for the desired color intermediate points already exist. In doing so, it may be necessary to perform a calculation that weights the present RGB values to account for the particular shape of the additional triplices.
  • the normal triplizes which are symbolized as stars in Figures 4.1a and 4.1b, are excited. This is done in the conventional manner, with all three beams being directed through a hole in the shadow mask with the intensity necessary to produce the color dot.
  • the electron beams must travel through two or three holes of the shadow mask to produce a triplex, with one or two beams being blanked.
  • Figure 4.2a the electron beams are first passed through the hole of the mask with the coordinates (1.1) and the electron beam is darkened for green. Subsequently, the electron beams pass through the hole (2, 2), whereby now the red and blue rays are not emitted.
  • the additional triplizes represent an increase in the resolution.
  • the actually achievable increase in resolution is dependent on the refresh rate of the playback device and the adaptability of the eye.
  • the inventive method can also be used with the advantage of image enhancement, at 100 Hz television.
  • the television pictures are displayed in ABAB or AABB format.
  • the fields A (Fig. 5.1) and B (Fig. 5.2) are those delivered by the transmitting station. They consist of normal triplizes. Both fields are displayed twice on the screen. At least for this repeated representation now modified according to the invention fields A 'and B' are sent with additional color dots; however, both representations of a field can also be modified.
  • a 'and B' can be generated from an adjacent HDTV signal, obtained from computed synthetic images / movies, or constructed from fields A and B (eg, by interpolation). Examples of summing the pixels to additional color points are given below for an inline mask.
  • the right base color pixel of a normal triplex of field A is combined with the two left base color pixels of the next normal triplex, as shown in Fig. 5.3.
  • the focal points of these additional triplices are determined.
  • color values are now determined by assigning color points from an HDTV signal or by interpolation. In the simplest case, the interpolation can be done by linear interpolation in the line. ' But even more complex methods are possible: eg a calculation of several surrounding points.
  • the method described for the 100 Hz technique can be modified such that not the consecutive pixels in the line, which are also addressed directly in succession in the scanning, are combined to new pixel combinations, but triplets are formed whose color pixels in conventional Be - Drive belong to Triplizes that belong to different lines, but may be spatially closer together than the pixel of the same line.
  • the color pixels associated with such a combined triplex would no longer be driven at virtually the same time but with a delay by the time interval required by the electron beam to travel one full line.
  • a further modification consists in that with each image repetition of the images A, B for the additional color points of the modified images A ', B' another pixel combination is used, so that the color centroid occupies different discrete layers.
  • the method of introducing additional color dots offers the possibility of displaying stereo images in a higher resolution.
  • the fields, their number of color dots by the additional color points and by the already explained variation of the centers of gravity of these additional color points was enlarged, sent to the left and right eye by means of a shutter device.
  • FIGS. 7a to 7f show an RGB example given by a special topological summary of an existing (high-resolution) picture in lines 1, 2, 3, 4, 5, 6, 7, 8, 9,.. Values are additively formed new lines 1, 3, 5, 7, 9, ... (or 2, 4, 6, 8 ...), which on an output device with the physical lines of the numbering according to agreement 1, 3, 5, 7, 9, ... (or 2, 4, 6, 8...) - with a lower resolution than the recording device - can be reproduced.
  • Fig. 7a Representation of an original image in HDTV resolution on the RGB triplets of the slit-mask display (HDTV display)
  • Fig. 7b Reduction of the color intensity of the RGB values to 50% of the original image value
  • Fig. 7c Rearrangement of the RGB values of the color points from the even numbers reduced to 50% of the intensity Lines 2, 4, 6, 8, 10, ... of the HDTV original in the even-numbered lines, the agreed according to the physical lines agreed for the frame A numbering 1, 3, 5, 7, 9, .... of the TV displays correspond
  • Fig. 7d Additive superimposition of the RGB values of the color dots, reduced to 50% of the intensity, from the non-values of the color dots from the even-numbered lines of the HDTV original (see Fig. 7c), whereby the resulting RGB intensity values are the physical lines in the agreed for the frame A numbering numbering 1, 3, 5, 7, 9, ... of the TV display come as a full screen for presentation.
  • Fig. 7e Redirecting the RGB values of the color dots from the odd-numbered lines of the HDTV original to 50% of the intensity into the even-numbered lines that correspond to the physical lines (de facto the same as in Fig. 7c and 7d) the numbering agreed for frame B
  • FIGS. 8a to 8d show, by way of a specific topological summary of given RGB values, addi in an exemplary embodiment such as from a present recording in columns 1, 2, 3, 4, 5, 6, 7, 8, 9, - tiv new columns 1, 3, 5, 7, 9, ... (or 2, 4, 6, 8 ...) formed on an output device with the physical columns of the agreed numbering 1, 3, 5 , 7, 9, ... (or 2, 4, 6, 8 ...) - with a lower resolution compared to the recording device - can be reproduced.
  • Fig. 8c Rearranging the RGB values of the color dots from the even-numbered columns 2, 4, 6, 8,... Of the HDTV original, reduced to 50% of the intensity, into the odd-numbered columns, which according to the agreement are the physical columns of the Frame A correspond to numbering 1, 3, 5, 7, 9, ... of the reproducing TV display
  • Fig. 8d Additive superimposition of the RGB values of the color points from the odd-numbered columns reduced to 50% of the intensity with the RGB values of the color points from the even-numbered columns reduced to 50% of the intensity
  • Fig. 8e Redirection of the RGB values of the color dots from the odd-numbered columns of the HDTV original to 50% of the intensity reduced in the even-numbered columns which according to agreement correspond to the physical columns of the numbering 2, 4, 6, 8, ... agreed upon for frame B (but in fact the same as in Fig. 7c and 7d) of the TV display
  • Fig. 8f Additive superimposition of the RGB values of the color points from the even-numbered columns, reduced to 50% of the intensity, with the RGB values of the even values reduced to 50% of the intensity
  • FIGS. 9a to 9f show an RGB example given by a special topological summary of an existing (high-resolution) picture in lines 1, 2, 3, 4, 5, 6, 7, 8, 9,.. Values additively form new lines 1, 3, 5, 7, 9, ... (or 2, 4, 6, 8 ...) which are displayed on a flat-screen output device with the physical lines of the numbering 1 as agreed. 3, 5, 7, 9, ... (or 2, 4, 6, 8 ...) - with a lower resolution compared to the recording device - can be played back.
  • Fig. 9a Representation of an original image in HDTV resolution on the RGB triplets of the plasma or LCD display (HDTV display)
  • Fig. 9b Reduction of the color intensity of the RGB values to 50% of the original image value
  • Fig. 9c Rearrangement of the RGB values of the color dots from the even-numbered lines 2, 4, 6, 8, 10, ... of the color blocks reduced to 50% of the intensity
  • Fig. 9d Additive superimposition of the RGB values of the color dots, reduced to 50% of the intensity, from the un-values of the color dots from the even-numbered lines of the HDTV original (see Fig. 7c), whereby the resulting RGB
  • Fig. 9f Additive superimposition of the RGB values of the color dots from the even-numbered lines reduced to 50% of the intensity with the RGB values of the color dots from the odd-numbered lines of the HDTV original reduced to 50% of the intensity RGB intensity values on the physical lines in the agreed for the frame B numbering 2, 4, 6, 8, 10 ... come to the TV display for display.
  • Embodiments for coding transformation are described below.
  • new color points (Si, Zj *) can be coded from color points (Si, Zi) and (Si, Zj + 1) of adjacent lines Zj and Zj + 1 of the original image.
  • These new color points (Si * (1), Zj), (Si * (2), Zj) together with the color points (Si, Zj) and (Si + 1, Zj) of the original image contain more resolution information than these alone.
  • Arranged in additional columns Si * and additional lines Zj * this results in an objective resolution improvement for the original image.
  • a further (virtual) improvement in perceived resolution arises.
  • FIGS. 10a to 10d show an exemplary embodiment of how, from a present recording in lines 1, 3, 5, 7, 9,..., By means of a specific combination of given RGB values, new lines 2, 4, 6, 8,... ., which can be reproduced from an output device with the physical (and / or virtual) lines 1, 2, 3, 4, 5, 6, 7, 8, 9, ....
  • FIGS. 11a to 11d show an exemplary embodiment, such as from a present recording in columns 1, 3, 5, 7, 9,...
  • new columns 2, 4, 6, 8,. ... are formed, which can be reproduced from an output device with the physical (and / or virtual) columns 1, 2, 3, 4, 5, 6, 7, 8, 9, ....

Abstract

La présente invention porte sur un procédé d'amélioration de la résolution d'images et peut s'utiliser pour les types les plus divers d'affichage en couleur, y compris en grand format, notamment sur les téléviseurs, les moniteurs et les écrans à affichage à cristaux liquides. Autre domaine d'application: les appareils de prise de vues. L'un des principes à la base de l'invention est que pour réduire le coût de mise en oeuvre de procédés connus fondés sur les points pixels de couleur élémentaires classiques, il convient de former de nouveaux points de couleur supplémentaires, dont les centres colorés se trouvent hors des centres colorés des points de couleur classiques. On détermine par interpolation les valeurs chromatiques à représenter dans les centres colorés des points de couleur supplémentaires à partir de l'environnement de ces derniers, ou bien on les évalue à partir d'un signal existant de télévision haute définition. En présence d'une image de synthèse, on dérive de ladite image les valeurs chromatiques à représenter. L'invention se caractérise également en ce que les images de points de couleur supplémentaires dérivées desdites images de synthèse sont stimulées en séquence rapide.
PCT/DE1998/001033 1997-04-04 1998-04-06 Amelioration de la resolution d'image avec des appareils de reproduction d'image couleur et de prise de vues couleur WO1998046004A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU82054/98A AU8205498A (en) 1997-04-04 1998-04-06 Improved image resolution with cameras and copy cameras
EP98931897A EP1016287A2 (fr) 1997-04-04 1998-04-06 Amelioration de la resolution d'image avec des appareils de reproduction d'image couleur et de prise de vues couleur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997114906 DE19714906A1 (de) 1997-04-04 1997-04-04 Verfahren zur Verbesserung der Bildauflösung bei Farbbildwiedergabegeräten
DE19714906.5 1997-04-04

Publications (3)

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WO1998046004A2 WO1998046004A2 (fr) 1998-10-15
WO1998046004A3 WO1998046004A3 (fr) 1998-12-30
WO1998046004A9 true WO1998046004A9 (fr) 1999-03-11

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EP (1) EP1016287A2 (fr)
AU (1) AU8205498A (fr)
DE (1) DE19714906A1 (fr)
WO (1) WO1998046004A2 (fr)

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DE19954029C1 (de) * 1999-11-11 2001-04-05 Grundig Ag Vorrichtung zur Verbesserung der Bilddarstellung auf einem Display

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JPS5237734B2 (fr) * 1972-06-22 1977-09-24
US5748770A (en) * 1993-11-30 1998-05-05 Polaroid Corporation System and method for color recovery using discrete cosine transforms
JP3392564B2 (ja) * 1995-02-27 2003-03-31 三洋電機株式会社 単板式カラービデオカメラ

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