WO2012120272A1 - Système d'affichage et procédé de commande d'un écran - Google Patents

Système d'affichage et procédé de commande d'un écran Download PDF

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Publication number
WO2012120272A1
WO2012120272A1 PCT/GB2012/050372 GB2012050372W WO2012120272A1 WO 2012120272 A1 WO2012120272 A1 WO 2012120272A1 GB 2012050372 W GB2012050372 W GB 2012050372W WO 2012120272 A1 WO2012120272 A1 WO 2012120272A1
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WO
WIPO (PCT)
Prior art keywords
symbology
image
primary
range
intensity
Prior art date
Application number
PCT/GB2012/050372
Other languages
English (en)
Inventor
Jason Rodney Garnham
Paul Michael SHEARS
Original Assignee
Bae Systems Plc
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
Priority claimed from EP11275040A external-priority patent/EP2498246A1/fr
Priority claimed from GBGB1103987.2A external-priority patent/GB201103987D0/en
Application filed by Bae Systems Plc filed Critical Bae Systems Plc
Publication of WO2012120272A1 publication Critical patent/WO2012120272A1/fr

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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
    • G09G5/028—Circuits for converting colour display signals into monochrome display signals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/08—Biomedical applications

Definitions

  • the present invention relates to a display system and method for controlling a display.
  • the invention relates to the display of a monochromatic image generated from a source, or primary, image containing colour.
  • Displays are used in a multitude of different technical fields and applications, for example, military, medical and general scientific usage.
  • display or graphical user interfaces, including CRT, LED, LCD and plasma.
  • head or helmet mounted displays, or head-up displays have found increasingly utility.
  • These latter displays are generally referred to as augmented reality (AR) displays, in which a user can view a real world scene through the display combined with additional information or images which appear superimposed on the real world scene.
  • AR displays typically comprise one or more waveguides at least one of which acts as a combiner combining a real world scene with additional images or information.
  • a colour, or polychromic, display 100 is shown in Figure 1 .
  • the display may be any type of graphical user interface such as a monitor, for example, or a head up display, or head or helmet mounted display.
  • the display may be capable of displaying colour images using for example the RGB color model which is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colours.
  • RGB color model which is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colours.
  • a colour is given a value between 0 and 255 for each of its constituent primary colours so for instance a particular green may be R 32 , G 128 , B 32 and a red may be R 128 , G 32 , B 32 .
  • White is represented by R 255 , G 255 , B 255 and black is R°, G°, B°.
  • Other colour space models may also be used in the present invention for example Cyan Magenta Yellow and Key
  • the colour display 100 is shown displaying a primary image consisting of a real world scene 102 including two trees on a hill side.
  • the colour of the leaves on the tree will vary and may be R 120 , G 170 , B 66 at one point of the image and R 129 , G 189 , B 27 at another point of the image.
  • For certain uses of a display it may be required to superimpose graphical information, or symbology.
  • horizontal and vertical lines 104 and 106 are superimposed on the image 102 in Figure 1 . In order to help a user view the lines, they may be coloured and in this example line 104 is green (R 32 , G 128 , B 32 ) and line 106 is red (R 128 , G 32 , B 32 ).
  • the colour of each line is consistent and does not vary, unlike the colours of other objects in the image. The consistency of colour allows the lines to be easily seen.
  • a monochromatic display may be preferred or required, for example, where the display is capable of displaying only monochromatic images or where a display is capable of displaying in colour but a monochromatic display is preferred.
  • a waveguide display typically displays in monochrome, since the display of colour images by a waveguide can lead to chromatic aberration. In AR displays it can also be desirable to display in monochrome so that a viewer can easily distinguish between a real world scene or image and synthetically generated images.
  • a monochrome display is not well suited for the display of coloured graphical information.
  • a monochrome display displays only one colour but is capable of displaying different intensities e.g. in grayscale for a black and white display, or green scale for example in the commonly adopted colour for AR displays. The contrast between intensities allows the user to differentiate between different aspects of the image.
  • Figure 2 shows such a monochrome display 1 10 which is displaying the same primary image consisting of the real world scene and graphical information as shown in Figure 1 .
  • the lines 104, 106 lack clarity and are less easily distinguishable from the rest of the image and from each other. This is because a monochromatic display 1 10 may display similar colours as similar intensities or may even display different colours as similar intensities.
  • the present invention is not restricted to augmented reality displays
  • the use of head mounted displays have found recent utility in the field of medicine in which images are displayed to a surgeon, for example, during an operation.
  • Such additional images may include X-rays, MRI and ultrasonography displayed to assist a clinician during their work.
  • a MRI scan is shown in Figure 3, in which a scan 1 12 of a patient's head is displayed on a polychromic display 120 with superimposed symbology in the form of datum lines 1 14, for example a green line, and 1 16, for example a red line.
  • the colour lines 1 14 and 1 16 are easily distinguishable from the background image in the primary colour image.
  • the primary image is less easily distinguishable from the lines 1 14, 1 16 as lines 1 14 and 1 16 appear grey on a grey scale primary image.
  • information in the form of text or graphics may be superimposed over television images.
  • An example of such an arrangement is where program information is displayed over visual images on a typical television broadcast or cable network.
  • Such arrangements are configured for the display of polychromic text or graphics over polychromic video images. Either the displayed text and graphics is difficult to read or the background image is difficult to see. The problem with these displays is that they do not enable text and graphics to be adequately viewed whilst at the same time retaining clarity of the video images.
  • the extant problem is that monochromatic images frequently make symbology indistinguishable from the entirety of or parts of the reproduced image.
  • the symbology can therefore become less apparent from the original image in a reproduced monochrome image.
  • the background images may become obscured for the sake of clarity of the symbology.
  • the present invention seeks to at least alleviate the above described problem.
  • the present invention provides a method of controlling a display for displaying a monochromatic image representative of a polychromic image input, the polychromic image input comprising a primary image and symbology having at least one selected colour superimposed on the primary image, the method comprising: receiving said polychromic image input, determining at least one primary range of intensities for representing the primary image and at least one secondary range of intensities for representing the symbology, said at least one primary range not overlapping with said at least one secondary range, and displaying the monochromatic image by representing the primary image by intensities in said at least one primary range and by representing the symbology by intensities in said at least one secondary range.
  • the primary and secondary ranges are mutually exclusive to provide sufficient contrast between the primary image and symbology to assist a viewer observing the monochromatic image to distinguish between the primary image and the symbology.
  • the symbology intensity in said at least one secondary range at which said symbology is displayed may be spaced apart from the primary range to enhance in the monochromatic image the contrast between the displayed symbology and the primary image.
  • the symbology intensity may be spaced apart from said primary range by a range of intensities which are not displayed in the monochromatic image.
  • the said at least one primary range may extend from a low intensity to an intermediate intensity between said low and a high intensity, and said at least one secondary range may extend from said intermediate intensity to said high intensity.
  • the said at least one primary range may extend from a high intensity to an intermediate intensity between said low and a high intensity, and said at least one secondary range may extend from said intermediate intensity to said low intensity.
  • the said at least one primary range may comprise a plurality of sub-ranges between a low intensity and a high intensity, and said at least one secondary range may extend between the or each adjacent said sub-ranges.
  • the polychromic image input may comprise symbology having a plurality of discrete selected colours superimposed on the primary image, and the method may comprise displaying the monochromatic image by representing the symbology in said at least one secondary range by discrete intensities corresponding to respective said colours.
  • the said polychromic image input may comprise image data corresponding to each picture element for reproducing said primary image and said symbology
  • the method may comprise processing said image data to determine the colour of each picture element, wherein if the colour of a picture element is not generally equal to the selected colour or colours of the symbology the intensity at which said picture element colour is displayed in said monochromatic image is modified to correspond with an intensity in said at least one primary range, and if the colour of a picture element is generally equal to the selected colour or colours of the symbology the intensity at which said picture element colour is displayed in said monochromatic image is modified to correspond with an intensity in said at least one secondary range.
  • the colour of a picture element is not generally equal to the selected colour or colours of the symbology the intensity at which said picture element colour is displayed in said monochromatic image may be multiplied by a factor of less than one to correspond with an intensity in said at least one primary range. If the colour of a picture element is generally equal to the selected colour or colours of the symbology the intensity at which said picture element colour is displayed in said monochromatic image may be shifted to one or more discrete intensities in said at least one secondary range.
  • the present invention also provides a display system comprising: a display for displaying a monochromatic image representative of a polychromic image input, the polychromic image input comprising a primary image and symbology having at least one selected colour superimposed on the primary image, and a processing unit configured to receive said polychromic image input, to determine at least one primary range of intensities for representing the primary image and at least one secondary range of intensities for representing the symbology, said at least one primary range not overlapping with said at least one secondary range, and outputting to said display a monochromatic image output in which the primary image is represented by intensities in said at least one primary range and the symbology is represented by intensities in said at least one secondary range.
  • the primary and secondary ranges are mutually exclusive to provide sufficient contrast between the primary image and symbology to assist a viewer observing the monochromatic image to distinguish between the primary image and the symbology.
  • the said polychromic image input may comprise image data corresponding to each picture element for reproducing said primary image and said symbology
  • the processing unit may be configured to determine the colour of said picture elements and output to said display a symbology intensity in said at least one secondary range for each picture element having said selected colour and a primary image intensity in said at least one primary range for each picture element not having said selected colour.
  • the symbology intensity may be spaced apart from the primary range to enhance in the monochromatic image the contrast between the displayed symbology and the primary image.
  • the polychromic image input may comprise symbology having a plurality of discrete selected colours superimposed on the primary image, and the processing unit may be configured to output a monochromatic image output in which the symbology is represented by discrete respective intensities corresponding to said colours in said at least one secondary range.
  • the discrete symbology intensities in said at least one secondary range at which said symbology is displayed may be spaced apart one from another and from the primary range to enhance in the monochromatic image the contrast between the displayed symbology and between the displayed symbology and the primary image.
  • Figure 1 shows a known colour display
  • Figure 2 shows a known monochromatic display
  • Figure 3 shows another known colour display
  • Figure 4 shows another known monochromatic display
  • Figure 5 shows schematically a display system according to the present invention
  • Figure 6 shows a monochrome display according to the present invention
  • Figure 7 shows another monochrome display according to the present invention.
  • Figure 8 shows schematically a method of displaying polychromic images on a monochrome display according to the present invention.
  • a display system 10 which comprises a display 12 for displaying a monochromatic image 14 from a polychromic image input 16.
  • the polychromic input image 16 comprises a primary image 18 and symbology 20 having a selected colour superimposed on the primary image 18.
  • the primary image 18 may be any image for example of a real world scene or an image of an object, or patient, as described by way of example below.
  • the primary image 18 may be monochrome (e.g. grey scale or green scale) or polychrome (e.g. full or partial colour).
  • the symbology 20 may include a pre-determined list of symbols that are synthetically generated and are a combination of points, lines or areas.
  • the symbology 20 may include alphanumerical characters.
  • Such symbology is formed in a generally known set of colours and such colours may include grey or grey scales. Accordingly, the symbology 20 is generated within pre-defined or bounded limits which can be isolated from the colours forming the primary image 18. The symbology 20 is generated separately from the primary image 18 and superimposed over the primary image 18 in for example a display source 22 shown in Figure 5. The symbology 20 generated is selected to be a particular colour, for example green R 32 , G 128 , B 32 in an RGB colour model, and the colour is generally consistent across the extent of each symbol within the suite of symbology 20. The consistency allows a viewer of the combined monochrome image 14 to more easily distinguish the symbology 20 from the primary image 18.
  • symbology 20 may be generated in respective colours, for example green R 32 , G 128 , B 32 and red R 128 , G 32 , B 32 in the RGB model.
  • the symbology 20 may represent any useful information to a viewer such as datum lines, alphanumeric characters, scales or chronology.
  • the display 12 may be any of the displays described above with reference to the prior art, for example a waveguide display or monitor.
  • the display 12 is configured for displaying intensities in a dynamic range which for convenience herein is referred to as 0% to 100% intensity. 0% may represent the lowest brightness and 100% may represent the highest brightness that the display can generate.
  • a processing unit 24 is configured to receive the polychromic image input 16 and determine at least one primary range of intensities for representing the primary image 18 and at least one secondary range of intensities for representing the symbology 20. In the example described in more detail below, a single primary range and a single secondary range are generated. The primary range(s) do not overlap with the secondary range(s) so that a viewer can view the primary image 18 in the primary range and the symbology 20 in the secondary range.
  • the processing unit 24 outputs to the display 12 a monochromatic image output 26 in which the primary image 18 is represented by intensities in said at least one primary range and the symbology 20 is represented by intensities in said at least one secondary range.
  • the display 12 receives the monochromatic image output 26 and displays a monochromatic image 14 having a dynamic range of intensities (image brightness). Since the primary image 18 and symbology 20 are in different ranges the contrast between the primary image 18 and the symbology 20 can be more easily distinguished than is the case with know arrangements.
  • the symbology 20 intensity displayed in the or each secondary range is spaced apart, by a predefined or a dynamically generated unused intensity range, from the primary range to enhance in the monochromatic image 14 the contrast between the displayed symbology 20 and the primary image 18.
  • the unused intensity range is not used in the displayed image thereby improving the contrast between the intensity in the primary range which is closest to the intensity of the displayed symbology 20.
  • the symbology 20 may have specific intensities within the secondary range such that there will be a greater distinction between the intensity of the primary range closest to the secondary range and the symbology 20 in the secondary range, thereby creating a band gap of unused intensities between the most intensity portion of the primary image 18 and the symbology 20.
  • the unused intensity range may be preselected based on the type of primary image 18 and symbology 20 that will be displayed in order to obtain appropriate contrast. For example, if the primary image 18 will comprise predominantly blacks or other dark colours, it may be sufficient to provide a relatively small band of unused intensities in order to distinguish the relatively high intensity symbology 20 from the primary image 18. If though the primary image will comprise whites, yellows and other bright colours a larger band of unused intensity may be required to distinguish the symbology 20 from the primary image 18.
  • the processing unit 24 may be configured to determine the unused range by sampling the polychromic image input 16 and dynamically generating an appropriate unused range.
  • the primary image 18 may be sampled to determine its range of colour and brightness and dependent on said range the processing unit 24 determines the unused bandwidth between the primary range and that part of the secondary range used to display the symbology 20.
  • a primary image 18 may be sampled to determine unused intensity ranges that occur within the image naturally, and the symbology 20 may be displayed at determined unused intensity. For example, a histogram of intensities of the primary image 18 may be generated, and the symbology 20 displayed at an intensity or intensities which is generally zero in the histogram.
  • a display 12 is shown in Figure 6 for displaying a monochromatic image 14 from a polychromic image input 16.
  • the polychromic image input 16 is the same as shown in Figure 1 .
  • the display 12 is configured for displaying intensities from a low or zero intensity to a high intensity or full saturation.
  • the primary range extends from a low intensity to an intermediate intensity between the low and high intensities, and the secondary range extends from the intermediate intensity to said high intensity.
  • the consequence of this process is that, as will be appreciated from Figure 6, the primary image is displayed at a lower intensity (a shade of grey), whereas the symbology is displayed at a higher intensity (black in this example). In this way, the contrast between the symbology 20 and the primary image 16 is improved helping a viewer to view all aspects of the monochromatic image 14.
  • FIG 7. Another monochromatic image 14 is shown in Figure 7.
  • the primary image 18 and the symbology 28, 30 are similar to that shown in Figure 3.
  • the primary image 18 is relatively low in intensity consisting mostly of blacks and dark greys. Therefore, the secondary range is selected to be at relatively high intensity and the symbology 20 is displayed as whites or light greys. This arrangement is clearly different from that shown in Figure 6 in which the symbology 20 is displayed as blacks.
  • the original symbology 28, 30 superimposed on the primary image 18 in the display source 22 comprises two discrete colours, for example, blue and red.
  • the symbology 28 is displayed at one intensity in the secondary range (e.g. 100% intensity) and the symbology 30 is displayed at another intensity in the secondary range (e.g. 90% intensity).
  • the discrete symbology intensities in the secondary range at which the symbology is displayed are spaced apart one from another and from the primary range to enhance in the monochromatic image 14the contrast between the displayed symbology 28, 30 and between the displayed symbology 28, 30 and the primary image 18.
  • the primary image intensity may be 0 to 80% and the first and second symbology intensities may be 90% and 100%, respectively. Therefore, the intensities are spaced apart by 10% of the available intensity range of the displayed monochromatic image 14.
  • data representing the polychromic image input 16 is received from the display source by the image processor 24.
  • the polychromic image input 16 comprises image data corresponding to each picture element for reproducing the primary image 18 and the symbology 20.
  • the processing unit 24 is configured to determine the colour of the picture elements and output a symbology intensity in the secondary range for each picture element having the selected symbology colour and a primary image intensity in the primary range for each picture element not having said selected colour. Therefore, each picture element, or pixel, is sampled to determine its colour.
  • the RGB colour model is discussed in detail herein but it will be appreciated that the invention relates to any other colour model, for example, colour may be defined simply as a wavelength in the visible spectrum.
  • each picture element may be represented by Rx, Gx, Bx, where x is a number from 0 to 255.
  • the maximum intensity of each colour represents white and is defined by R 255 , G 255 , B 255 and the complete absence of each colour, or zero intensity (representing black), is defined by R°, G°, B°.
  • a monochromatic image is represented on a scale of 0% to 100% intensity, or brightness, range where the difference in intensity between 0% and 100% constitutes the maximum contrast.
  • a picture element Rx, Gx, Bx equates to an intensity z% where z is a number between 0 and 100.
  • a brown R 75 , G 41 , B 33 is represented by 10% intensity and a yellow R 252 , G 241 , B 46 is represented by 75% intensity.
  • each colour in the primary image 18 be represented by an intensity from 0% to 100%, it is represented by an intensity in only part of the range, for example from 0% to 80%.
  • any and all pixels from the primary image 18 (R x1 , G x1 , B x1 ) will be converted to a secondary image (R* 2 , G x2 , B x2 ) by scalar modification of intensity value.
  • the modification is a scalar reduction so that X2 is equal to 0.8X1 .
  • the primary image 18 has a pixel constituted as R 200 , G 100 , B 100
  • a scalar reduction of these intensities to 80% of their original values will produce the secondary image pixel constituted as R 160 , G 80 , B 80 .
  • Such a modification is performed for all pixels in the primary image 18 excepting any specific and defined colour intensities of the symbology.
  • the modification may be made with the addition of a constant if a shift in the intensities is required over and above a reduction or an increase in the intensity range.
  • the polychromic image data 16 received from the display source also comprises symbology 28, 30.
  • the symbology 28, 30 typically occupies a plurality of adjacent picture elements and may be linear as shown in the Figures or may be alphanumeric.
  • the colour of each symbol in a symbology character set is constant, as opposed to the primary image 18, which will almost invariably comprise of variable colour(s). Accordingly, the image processor 24 locates those picture elements having the selected symbology colours and outputs monochromatic data 26 with those picture elements having an intensity in the secondary range.
  • symbology having a selected colour R 200 , G 100 , B 100 will be assigned, in the secondary range, a constant intensity equal to 100% intensity (equivalent ordinarily to R 255 , G 255 , B 255 ) or white.
  • the image processor 24 locates the target colours within a reasonable tolerance limit: for instance any pixels of the range R 200 ⁇ 2 , G 100 ⁇ 2 , B 100 ⁇ 2 will be regarded as symbology.
  • the image processor 24 may identify symbology only if there are a plurality of picture elements in close proximity with the same colour thereby distinguishing from those isolated picture elements in the primary image 18 which happen to have an exact match with the target colour.
  • the image processor 24 may store the expected shapes of the displayed symbology and determine those shapes in the image, for example, alphanumerics, circles, or lines.
  • the image processor 24 determines the pictures elements with that colour and assigns to it a constant intensity, in the secondary range, equal to say 90% of the maximum intensity. In this manner, symbology associated with one colour will have an intensity distinguishable from the intensity or intensities assigned to symbology associated with a different colour or colours.
  • symbology having different discrete colours may be identified as required.
  • all symbology may be displayed at the same constant intensity.
  • the primary range is compressed to allow those symbology intensities to be spaced apart from each other and from the primary range to allow a viewer to readily distinguish one from another.
  • the primary range may usefully be reduced to 70% and the symbology displayed at intensities of 80%, 90% and 100% of the maximum.
  • a spacing of about 10% intensity allows a person to distinguish the elements of the display.
  • a spacing of 5% or possibly even lower may be acceptable however depending on the content of the displayed monochromatic image.
  • the image processor 24 may be configured to determine in real time regions of dark (or light) intensity in the primary image and display the symbology at an intensity which allows it to be distinguished from the primary image.
  • the amount of compression of the primary image is generally inversely rated to the number of target symbology colours, since an increase in the number of discrete symbology colours in the secondary range requires a decrease in the primary range whilst providing optimal differentiation, given other constraints. Constraints include the clarity of the original or primary image required in the monochromatic image, since the general reduction of intensities for all pixels will serve to reduce the contrast inherent in the original image.
  • the above more detailed description relates to display of symbology in a secondary range which is more intense than the primary range, as shown in Figure 7.
  • the primary image is compressed and shifted by a constant (for example 20%). That is, the primary image may be compressed to a range of 0% to 80% and shifted by 20% to a range of 20% to 100%.
  • two target symbology colours can be represented at intensities 0% (R°, G°, B°) or black, and 10% (R 26 , G 26 , B 26 ) or dark grey, and the primary image will be displayed in the intensity region 20%- 100% (or RGB 51"255 ).
  • the constant to be added to intensity values reduced by the normal scalar process will simply be (100-GRF)% of maximum intensity.
  • the primary range may extend from a high intensity (e.g. 100%) to an intermediate intensity (e.g. 20%), and the secondary range may extend from the intermediate intensity to a low intensity (0%).
  • the primary range may comprise a plurality of sub-ranges between the low intensity and the high intensity (e.g. 0% to 35% and 65% to 100%), and the secondary range may extend between the adjacent sub-ranges (e.g. 35% to 65%).
  • This arrangement may be useful where the primary image contains picture elements of generally high and low intensity but there is relatively less picture elements having an intensity in the intermediate range. Accordingly, the symbology can be displayed at intensities in the intermediate, generally unused, range.
  • a head-up display typically displays in monochrome.
  • a viewer In head-up displays, a viewer must typically be able to view the primary image, the symbology and the real world scene through the display.
  • monochrome head-up displays allows the real world scene to be more easily distinguished from a single colour representing the primary image and the symbology, since the brain becomes tuned to the single colour of the display and will easily distinguish between virtual images in that colour and real images in the full visible spectrum.
  • the primary image may consist of one or more still images or video images reproducing a sequence of still image in succession.
  • the displayed primary image and symbology may conform to the viewer's line of sight such that change of position or orientation of a viewer produces a commensurate change in the displayed images.
  • Such a latter arrangement is suited for providing a viewer with additional information on head-up display on the real world scene viewed through the display.
  • the primary image may be generated by a heat sensitive camera for use by emergency services for locating people or other objects in a low visibility environment.
  • the use of heat sensitive cameras is known however typically a viewer can either view the enhanced imagery through a viewer or the real world scene, but is not able to view enhanced image over the real world scene.
  • the symbology in this example may take the form of georeferences, heading, temperature etc.
  • the invention may be used in medicine for example by a surgeon executing minimally-invasive surgery, where the primary image may be historic MRI or X-ray images or live real-time feed from one or more cameras as required.
  • the symbology may comprise real-time information from other sources, for example equipment monitoring heart rate, blood pressure or blood oxygenation levels.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

Dans la présente invention, une unité de traitement (24) est configurée pour recevoir une entrée d'image polychrome (16) et déterminer au moins une plage primaire d'intensités pour représenter l'image primaire et au moins une plage secondaire d'intensités pour représenter la symbologie. La(les) plage(s) primaire(s) ne se chevauche(nt) pas avec la(les) plage(s) secondaire(s), de telle sorte que l'utilisateur peut voir l'image primaire dans la plage primaire et la symbologie dans la plage secondaire. L'unité de traitement (24) fournit en sortie à l'écran (12) une sortie d'image monochrome (26) dans laquelle l'image primaire est représentée par des intensités dans ladite au moins une plage primaire et la symbologie est représentée par des intensités dans ladite au moins une plage secondaire.
PCT/GB2012/050372 2011-03-09 2012-02-20 Système d'affichage et procédé de commande d'un écran WO2012120272A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP11275040A EP2498246A1 (fr) 2011-03-09 2011-03-09 Système d'affichage et procédé de contrôle d'un affichage
GBGB1103987.2A GB201103987D0 (en) 2011-03-09 2011-03-09 A display system and method for controlling display
GB1103987.2 2011-03-09
EP11275040.1 2011-03-09

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110025702A1 (en) * 2009-07-31 2011-02-03 Thales Method of Constructing Images for an Imaging Appliance

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110025702A1 (en) * 2009-07-31 2011-02-03 Thales Method of Constructing Images for an Imaging Appliance

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