EP1016287A2 - 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

Info

Publication number
EP1016287A2
EP1016287A2 EP98931897A EP98931897A EP1016287A2 EP 1016287 A2 EP1016287 A2 EP 1016287A2 EP 98931897 A EP98931897 A EP 98931897A EP 98931897 A EP98931897 A EP 98931897A EP 1016287 A2 EP1016287 A2 EP 1016287A2
Authority
EP
European Patent Office
Prior art keywords
color
lines
image
additional
resolution
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Withdrawn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
EP98931897A
Other languages
German (de)
English (en)
Inventor
Winfried Jentsch
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.)
JENTSCH, WINFRIED
Original Assignee
COIN ENGINEERING INSTITUT fur COMPUTERINTEGRIERTES ENGINEERING GmbH
COIN ENGINEERING INST fur COM
Coin Engineering Institut fur Computerintegriertes Engineering 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 COIN ENGINEERING INSTITUT fur COMPUTERINTEGRIERTES ENGINEERING GmbH, COIN ENGINEERING INST fur COM, Coin Engineering Institut fur Computerintegriertes Engineering GmbH filed Critical COIN ENGINEERING INSTITUT fur COMPUTERINTEGRIERTES ENGINEERING GmbH
Publication of EP1016287A2 publication Critical patent/EP1016287A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed

Definitions

  • the invention relates to a method for improving the image resolution in color image display devices, in which each conventional elementary color point from several to one unit, e.g. Triplex, formed color pixels and the elementary color points are arranged in columns and rows, as well as a method for improving the image resolution in color image recorders.
  • a major direction of improvement is the immediate increase in pixel density, ie the number of pixels on the screen, which applies to all screen types, including those based on tubes.
  • the transition to a higher resolution is associated with considerable technological problems and therefore also leads to a significant price increase, which, as experience in the market shows, is still disproportionate to the degree of resolution increase and the size of the screen diagonals.
  • 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 from a picture tube is subjected to a high-frequency vertical displacement effect during its travel through a jump line grid. The phase of the shift is changed in each field, which ultimately means that the transmission of each image is realized with four or even more fields.
  • Image flickering is inevitably associated with this method.
  • an image analysis system (according to excess factor) can be used and / or special picture tubes with luminophore areas lying behind one another with after-radiation and with a second cathode ray system.
  • the wobbulation method leads to an increase in the number of lines and thus to an increase in the image resolution, but the expenditure for additional electronics, among other things, for the high-frequency modulation of the beam deflection system and for the phase change is considerable.
  • the invention is based on the object of developing a method for improving the image resolution for image reproduction and image recording which enables the color points to be increased with simple means and which can also be implemented with the prior art.
  • the color pixels of the additional color points according to the invention are advantageously obtained by regrouping the existing color pixels, in that color pixels of different colors from at least two adjacent and / or obvious conventional color points also serve as color pixels of the additional color points.
  • the color values to be displayed in the individual color centers of the additional color dots can e.g. can be determined from known values of the environment by interpolation, including a larger environment.
  • the method according to the invention can be used in a wide variety of color displays, in particular in television sets, monitors, LED and LCD displays. With the same number of color pixels, more color points can be displayed than before. This is particularly advantageous in the case of miniaturization, as is necessary with color miniature monitors in video cameras. Furthermore, large-scale color displays can be manufactured so that the usual resolution can be achieved with less luminous material. In particular, the method can also be used in color interlacing and thus in television technology.
  • the additional color points being composed of asymmetrical RGB modulations of adjacent conventional color points so that the color centers between the Columns appear alternately above and below the middle of the row.
  • the color centers between the columns and / or rows must be calculated interpolatively from the neighboring rows and columns (from the environment).
  • Processes involving changes to the receiving and reproducing devices are primarily concerned with hardware / software for field storage, image processing and increased write frequency. Intelligent switching between tapping a real HDTV signal - for example, when the picture is not moving a lot - and interpolative image processing during action could lead to bandwidth-on-demand transmissions, which correspond to an optimal compromise in cost and quality.
  • the basis of the invention is the knowledge that representations on an RGB raster display are perceived in terms of physiological sense combined to form integral color pixels in such a way that a meaningful scene known from experience results if the RGB neighborhoods permit this. Objectively possible unrealistic summary are suppressed from a sensory physiological point of view.
  • a higher resolution original image OA is broken down into secondary images with partial resolutions - e.g. SA1 and SA2 - and then 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 superposed RGB values on a visualization display D with physically because only the resolution for a secondary image SA1 or SA2 can be perceived broken down into color pixels into SA1 and SA2, as if it were a matter of visualizing the original image OA.
  • RGB-CCD matrix Real images, projected on an RGB-CCD matrix, are usually read out in the same way that they are then visualized on a raster display.
  • An RGB readout strategy symmetrical to the visualization method of virtual lines then enables direct control of a raster display for the visualization of virtual lines analogous 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 do not match the lines, but to a certain extent (virtually lines), intermediate lines Zi-1 and Zi + 1 can be read out in such a way that their visualization does not show the real display lines Zi-2, Zi, Zi + 2, but the (virtual) intermediate lines Zi-1 and Zi + 1 takes.
  • the RGB values projected onto a physical CCD line Zi are read out from the real line Zi via the neighboring neighboring lines Zi-1 and Zi + 1 in such a way that one visualizes the (then re-encoded in a weighted RGB value summary using a suitable superposition using the visualization method) real line Zi not only perceives line Zi, but also the neighboring virtual lines Zi-1 and Zi + 1.
  • the present invention includes methods for forming the color dots (coding transformation) as well as methods for the resolution-improving representation (visualization transformation).
  • the coding transformation is a conversion (by rearrangement, multiple use, scaling ...) of the color points tapped from the RGB points of the camera recording grid and coded according to a standard method with the color point centers ZAi into the corresponding - and / or If necessary, in new resolution-enhancing - RGB combinations for the reproduction-side color centers Zwj of the visualization grid.
  • the visualization transformation is a conversion (by rearrangement, addition, scaling ...) of the incoming color points with the color point centers ZAi of the RGB combinations coded on the recording side into the corresponding - and / or possibly new resolution-improving - RGB combinations for reproduction-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 is physically (real) realized with raster resolution.
  • the core idea of the coding transformation inverse to the visualization transformation is that a conventional recording system can (virtually) encode a better image resolution than is physically (real) realized via the raster resolution.
  • the inventive solution is therefore independent of recording devices (raster cameras) and playback devices (raster displays). and only concerns methods for a suitable summary, Multiplication, scaling, etc. of given RGB points to color points.
  • the (virtual) resolution impression is equal to the doubling of the partial resolutions TAl, TA2, ie corresponds to the resolution OA of the original (for exemplary embodiments, see appendices 4 and 5).
  • the methods listed under interlaced mode and noninterlaced mode can be used to improve the row and / or the column resolution.
  • interlaced mode is particularly suitable for TV, while for web pages horizontal lines flicker with the row interlaced method or vertical lines with the column interlaced method.
  • noninterlaced mode are suitable for both TV and web pages, since the full-screen process used here leads to flicker-free visualizations.
  • Both methods can be used in combination for TV playback, in particular the improvement of the line resolution according to the interlaced mode and the improvement of the column resolution according to the noninterlaced mode.
  • image information for an original image which contains a larger number of image elements, which are arranged in columns and rows in matrix form, is provided than is physically realized on the output device.
  • the RGB values of the color dots which cannot be displayed directly on the output device, are either coded in chronological order (method according to (2)) or directly superimposed (method according to (3)) into the RGB values of adjacent rows and / or columns ("Visualization transformation").
  • the methods described above allow an additional number of AM * to be derived from an original image that was recorded with a number of AM of color dots (“coding transformation”), so that a higher resolution image with AN, AN >> AM, from the summary of the Color dots AM with the color dots AM * result
  • coding transformation with the visualization transformation now enables an improvement in the resolution of the reproduction of raster images, which were coded in accordance with the standard with conventional recording devices of the AM resolution, on conventional output devices of the physical resolution AM with a significantly higher resolution AN , AN >> AM.
  • Fig. 1 a color point of the delta type
  • Fig. 2 a section of a color display of the delta type
  • Fig. 3.1, 3.2 and 3.3 a section of a color display from Inline
  • Fig. 4.1a, 4.1b; 4.2a, 4.2b; 4.6a, 4.6b a diagram of the construction of images with additional color dots, starting from images with conventional color dots,
  • Fig. 5.1 A field A for 100 Hz television in an in-line variant
  • 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 image
  • Fig. 8c to 8f the additive formation of new columns for playback on an output device with low resolution
  • 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 in the middle marked with an asterisk (*) belongs to the quasi-simultaneously excited one RGB pixels, which form a normal triplex, lie.
  • RGB red, green and blue
  • Fig. 2 these are marked with a thick solid circle and their center with a (*) marked triplexes in a color display section.
  • Fig. 3.1 shows the normal triplexes, each marked with an ellipse, on a color display of an inline type.
  • the ellipses of Figs. 3.2 and 3.3 show the existing possibilities for the formation of additional triplexes.
  • Fig. 6.1 shows a triplex arrangement for color LCD displays, whereby normally formed triplexes are again identified by ellipses, at least in lines 1 and 2.
  • triangles and a rhombus in lines 1 to 4 indicate the variety of possibilities for the formation of 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 gives the possibility of smoothly displaying oblique edges or lines without anti-aliasing, ie without the sawtooth effect caused by the discrete arrangement of the pixels. Since the recoding of the luminance and chrominance signals is carried out before the image signal enters the playback unit (it could also be on the transmission side ), the generation of additional triplexes would be independent of the specific control of the pixels or the LCD elements.
  • Figs. 4.1a to 4.6b The derivation of the images with additional color dots and their diversity can be seen in Figs. 4.1a to 4.6b.
  • the centers of the triplexes excited in each case are marked with an *, and the centers of the conventional, elementary color points are, as in FIGS. 1 and 2, enclosed with a fully drawn circle.
  • the images according to Figs. 4.1a and 4.1b are created using the interlace method, in which the conventional color dots (triplexes) are formed and excited using the technique that was previously common.
  • the color values that are to be generated by the superimposition of the three primary colors (red, green and blue) and are to be displayed in the focal points of the (new, additional) RGB triplices can be obtained in various ways:
  • the normal triplices 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 required to generate the color point.
  • the electron beams have to go through two or three holes in the shadow mask to generate a triplex, whereby one or two beams are blanked out.
  • the electron beams are first guided through the hole in the mask with the coordinates (1.1) and the electron beam is blanked for green. The electron beams then pass through the hole (2, 2), the beams for red and blue now not being emitted.
  • the additional triplices represent an increase in resolution.
  • the resolution resolution that can actually be achieved depends on the refresh rate of the playback device and the adaptability of the eye.
  • the method according to the invention can also be used with the advantage of image enhancement at 100 Hz television.
  • Fields A and B are the ones supplied by the transmitting station. They consist of normal triplices. Both fields are displayed twice on the screen. At least for this repeated representation, fields A 'or B' modified according to the invention are now sent with additional color dots; however, both representations of a field can also be modified.
  • a 'and B' can be generated from an applied HDTV signal, obtained from calculated synthetic images / films or constructed from the fields A and B (eg by interpolation). Examples of the combination of pixels into additional color dots are given below for an inline mask.
  • the right basic color pixel of a normal triplex of field A is combined with the two left basic color pixels of the next normal triplex, as shown in Fig. 5.3.
  • the combination of two primary color pixels of the first triplex with one primary color pixel of the next triplex is also possible.
  • the focal points of these additional triplices are determined. For this focus, color values are now determined by assigning color points from an HDTV signal or by interpolation. In the simplest case, the interpolation can be carried out by linear interpolation in the line. ' But more complex methods are also possible: e.g. a calculation from several surrounding points.
  • the method described for the 100 Hz technology can be modified so that not the successive pixels in the line, which are also controlled directly in succession in the scanning process, are combined to form new pixel combinations, but triplices are formed whose color pixels are conventionally used - Driven belong to triplices that belong to different lines, but may be spatially closer together than the pixel of the same line.
  • the color pixels belonging to a triplex combined in this way would no longer be driven at virtually the same time, but with a delay by the time interval required by the electron beam to run through a full line.
  • a further modification consists in that a different pixel combination is used for each image repetition of the images A, B for the additional color points of the modified images A ', B', so that the color center takes on different discrete positions.
  • the method of introducing additional color dots offers the possibility of showing stereo images in a higher resolution.
  • the fields, their number of color points through the additional color points and through the already explained variation of the focal points of these additional color points was enlarged, sent to the left and right eye using a shutter device.
  • Figures 7a to 7f show an example of an example of an existing (high-resolution) image in lines 1, 2, 3, 4, 5, 6, 7, 8, 9, .... by means of a special topological summary of RGB -Values additively new lines 1, 3, 5, 7, 9, ... (or 2, 4, 6, 8 ...) are formed, which on an output device with the physical lines of the agreed numbering 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 triplices 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, reduced to 50% of the intensity, from the even numbers Lines 2, 4, 6, 8, 10, ... of the HDTV original into the even-numbered lines, which, according to the agreement, correspond to the physical lines of the numbering 1, 3, 5, 7, 9, .... des TV displays correspond
  • Fig. 7d 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), the resulting RGB intensity values the physical lines in the numbering 1, 3, 5, 7, 9, ... of the TV display agreed for full screen A are shown as full screen.
  • Fig. 7e Rearrangement of the RGB values of the color points, reduced to 50% of the intensity, from the odd-numbered lines of the HDTV original to the even-numbered lines, which according to the agreement are the physical lines (but in fact the same as in Figs. 7c and 7d) the numbering agreed for full screen B.
  • Fig. 7f Additive superimposition of the RGB values of the color points from the even-numbered lines reduced to 50% of the intensity with the RGB values of the color points from the odd-numbered lines of the HDTV original reduced to 50% of the intensity, the resulting RGB-intensity values are shown on the physical lines in the numbering 2, 4, 6, 8, 10 ... of the TV display agreed for the full frame B.
  • Illustrations 8a to 8d show an exemplary embodiment as in an existing image in columns 1, 2, 3, 4, 5, 6, 7, 8, 9, ... by adding a special topological summary of given RGB values new columns 1, 3, 5, 7, 9, ... (or 2, 4, 6, 8 ...) are formed, which 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 than the recording device - can be reproduced.
  • Fig. 8c Rearrangement of the RGB values of the color points, reduced to 50% of the intensity, from the even-numbered columns 2, 4, 6, 8, .... of the HDTV original into the odd-numbered columns, which according to the agreement are the physical columns for the Full screen A corresponds to the agreed 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 of the, reduced to 50% of the intensity
  • Fig. 8e Rearrangement of the RGB values of the color points from the odd-numbered columns of the HDTV original reduced to 50% of the intensity in the even-numbered columns, which by agreement correspond to the physical columns of the numbering 2, 4, 6, 8, ... agreed for the full screen 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 columns, which are reduced to 50% of the intensity, with the RGB values of the, reduced to 50% of the intensity
  • Figures 9a to 9f show an example of an existing (high-resolution) image in lines 1, 2, 3, 4, 5, 6, 7, 8, 9, ... by means of a special topological summary of the given RGB values additively new lines 1, 3, 5, 7, 9, ... (or 2, 4, 6, 8 ...) are formed, which on a flat screen display device with the physical lines of the numbering 1, 3 according to the agreement, 5, 7, 9, ... (or 2, 4, 6, 8 ...) - with a lower resolution than the recording device - can be reproduced.
  • Fig. 9a Representation of an original image in HDTV resolution on the RGB triplices 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 points from the even rows 2, 4, 6, 8, 10, ... des reduced to 50% of the intensity
  • HDTV originals into the even-numbered lines which, as agreed, correspond to the physical lines of the numbering 1, 3, 5, 7, 9, ... of the TV display agreed for full frame A.
  • Fig. 9d Additive superimposition of the RGB values of the color points reduced to 50% of the intensity from the un-values of the color points from the even-numbered lines of the HDTV original (see Fig. 7c), the resulting RGB-
  • Fig. 9f Additive superimposition of the RGB values of the color points from the even-numbered lines, which are reduced to 50% of the intensity, with the RGB values of the color points from the odd-numbered lines of the HDTV original, which are reduced to 50% of the intensity, the resulting ones RGB intensity values are shown on the physical lines in the numbering 2, 4, 6, 8, 10 ... of the TV display agreed for full frame B.
  • FIGs. 10a to 10d show an exemplary embodiment, such as lines 1, 3, 5, 7, 9, ... from a current recording, by special combination of given RGB values, new lines 2, 4, 6, 8, ... are formed from an output device with the physical (and / or virtual) lines 1, 2, 3, 4, 5, 6, 7, 8, 9. , , , , can be played.
  • Figures 11a to lld show an example of an implementation, such as new columns 2, 4, 6, 8,... From columns, 1, 3, 5, 7, 9,... By a special combination of given RGB values. ... 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, ....

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

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.
EP98931897A 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 Withdrawn EP1016287A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1997114906 DE19714906A1 (de) 1997-04-04 1997-04-04 Verfahren zur Verbesserung der Bildauflösung bei Farbbildwiedergabegeräten
DE19714906 1997-04-04
PCT/DE1998/001033 WO1998046004A2 (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

Publications (1)

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EP1016287A2 true EP1016287A2 (fr) 2000-07-05

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EP98931897A Withdrawn 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

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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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Publication number Priority date Publication date Assignee Title
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

Non-Patent Citations (1)

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Title
See references of WO9846004A3 *

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DE19714906A1 (de) 1998-10-08
WO1998046004A3 (fr) 1998-12-30
WO1998046004A2 (fr) 1998-10-15
AU8205498A (en) 1998-10-30

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