WO2000042762B1 - Methods, apparatus and data structures for enhancing resolution images to be rendered on patterned display devices - Google Patents

Methods, apparatus and data structures for enhancing resolution images to be rendered on patterned display devices

Info

Publication number
WO2000042762B1
WO2000042762B1 PCT/US2000/000804 US0000804W WO0042762B1 WO 2000042762 B1 WO2000042762 B1 WO 2000042762B1 US 0000804 W US0000804 W US 0000804W WO 0042762 B1 WO0042762 B1 WO 0042762B1
Authority
WO
WIPO (PCT)
Prior art keywords
sub
pixel
samples
pixel element
color
Prior art date
Application number
PCT/US2000/000804
Other languages
French (fr)
Other versions
WO2000042762A3 (en
WO2000042762A2 (en
Inventor
Claude Betrisey
Bodin Dresevic
Donald P Mitchell
John C Platt
Original Assignee
Microsoft Corp
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 Microsoft Corp filed Critical Microsoft Corp
Priority to JP2000594248A priority Critical patent/JP4667604B2/en
Priority to AU32083/00A priority patent/AU3208300A/en
Priority to DE60040209T priority patent/DE60040209D1/en
Priority to EP00909900A priority patent/EP1157538B1/en
Publication of WO2000042762A2 publication Critical patent/WO2000042762A2/en
Publication of WO2000042762A3 publication Critical patent/WO2000042762A3/en
Publication of WO2000042762B1 publication Critical patent/WO2000042762B1/en

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
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/005—Adapting incoming signals to the display format of the display terminal
    • 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
    • G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
    • G09G5/24—Generation of individual character patterns
    • G09G5/28—Generation of individual character patterns for enhancement of character form, e.g. smoothing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0457—Improvement of perceived resolution by subpixel rendering
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/10—Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
    • 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
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal
    • 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
    • G09G5/024—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 using colour registers, e.g. to control background, foreground, surface filling

Abstract

Techniques for improving the resolution of images (either analog images, analytic images, or images having a higher resolution than that of a display device) to be rendered on patterned displays (Fig.10). In one aspect of the present invention, discrete values of a color scan line such as the color scan line (1510) for the color red consist of N samples per emitter (for example, two or more samples (1515r), per emitter Fig. 15)). The samples (1515r) are filtered (e.g. averaged) in order to generate an oversampled color scan line (1520r) (such as a three times oversampled color scan line (Fig. 15)). The new samples of the oversampled color scan line (1520r) are filtered again with box filters (1525) to generate color values (1530) associated with sub-pixel components. The filters (1525) are centered at locations that correspond to the centers of the sub-pixel elements. Thus, the filters (1525) are offset, and consequently operate at distinct positions within the image for each of the color components. Once all of the colors are processed, filter output may be gamma correct (1540) based on the gamma response of a display on which the image is to be rendered.

Claims

AMENDED CLAIMS[received by the International Bureau on 6 October 2000 (06.10.00); original claims 1-39 replaced by amended claims 1-26 (6 pages)]
1. For use in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements of different colors per pixel, a method for improving spatial resolution of an image that is rendered by processing image information, the method comprising: accepting scan lines of the image information, the scan lines including at least two color components, each said scan line comprising at least two samples per sub-pixel element; applying first filters to sets of the samples, wherein each set comprises at least two samples, thereby generating new samples having color values that are derived from the filtering of the sets of the samples; and for each of the sub-pixel elements, applying second filters to the new samples to generate a separate filtered color value associated with each sub- pixel element, the second filter from which the separate filtered color value for a given sub-pixel element is derived being spatially displaced from the second filters applied for other sub-pixel elements.
2. The method of claim 1 wherein each said scan line comprises exactly two samples per sub-pixel element.
3. The method of claim 1 wherein the second filters applied to the new samples comprise box filters, each of the box filters being centered at a spatial location corresponding to a sub-pixel element.
4. The method of claim 1 further comprising an act of gamma correcting the new samples.
5. For use in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements per pixel, a method for improving spatial resolution of an image that is rendered by processing image information including blend coefficients defining a blend between a foreground color and a background color, the method comprising: accepting a scan line of the image information, the scan line including blend coefficients defining a blend between the foreground color and the background color; obtaining samples of the blend coefficients, at least one sample being obtained per sub-pixel element; for each of the sub-pixel elements, applying a filter to a set of at least two of the samples of the blend coefficients to generate a filtered blend coefficient for each sub-pixel element, the filter applied for each sub-pixel element being spatially displaced from the filters applied for the other sub- pixel elements; and applying the foreground color and the background color to each of the filtered blend coefficients to generate color values associated with the sub- pixel elements.
6. The method of claim 5 further comprising an act of gamma correcting the color values associated with the pixel sub-elements.
7. For use in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements per pixel, a method for improving spatial resolution of an image that is rendered by processing image information including blend coefficients defining a blend between a foreground color and a background color, the method comprising: accepting a scan line of the image information, the scan line including blend coefficients defining a blend between the foreground color and the background color and further including at least two samples of the blend coefficients per sub-pixel element; applying first filters to sets of the samples of the blend coefficients, thereby generating new samples having values that are derived from the filtering of the sets of samples; for each of the sub-pixel elements, applying second filters to the new samples to generate a filtered blend coefficient associated with each sub-pixel element, the second filter from which the filtered blend coefficient for a given sub-pixel element is derived being spatially displaced from the second filters applied for other sub-pixel elements; and applying the foreground color and the background color to each of the filtered blend coefficients to generate color values associated with the sub- pixel elements.
8. The method of claim 7 wherein the scan line includes exactly two samples per sub-pixel element.
9. The method of claim 7 wherein the second filters applied to the new samples comprise box filters, each of the box filters being centered at a spatial location corresponding to a sub-pixel element.
10. The method of claim 7 further comprising an act of gamma correcting the color values.
11. The method of claim 7 wherein at least one of the foreground and background color changes as a function of a position of the image.
12. For use in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements of different colors per pixel, an apparatus for improving spatial resolution of an image that is rendered by processing image information, apparatus for processing image information, the apparatus comprising: means for accepting scan lines of the image information, the scan lines including at least two color components, each said scan line comprising at least two samples per sub-pixel element; means for applying first filters to sets of the samples, wherein each set comprises at least two samples, thereby generating new samples having color values that are derived from the filtering of the sets of the samples; and means for each of the sub-pixel elements, for applying second filters to the new samples to generate a separate filtered color value associated with each sub-pixel element, the second filter from which the separate filtered color value for a given sub-pixel element is derived being spatially displaced from the second filters applied for other sub-pixel elements.
13. The apparatus of claim 12 wherein each said scan line comprises exactly two samples per sub-pixel element.
14. For use in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements per pixel, an apparatus for improving spatial resolution of an image that is rendered by processing image information including blend coefficients defining a blend between a foreground color and a background color, the apparatus comprising: means for accepting a scan line of the image information, the scan line including blend coefficients defining a blend between the foreground color and the background color, a sampler for: obtaining samples of the blend coefficients, at least one sample being obtained per sub-pixel element; and for each of the sub-pixel elements, applying a filter to a set of at least two of the samples of the blend coefficients to generate a filtered blend coefficient for each sub-pixel element, the filter applied for each sub-pixel element being spatially displaced from the filters applied for the other sub-pixel elements; and means for applying the foreground color and the background color to each of the filtered blend coefficients to generate color values associated with the sub-pixel elements.
15. For use in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements per pixel, an apparatus for improving spatial resolution of an image that is rendered by processing image information including blend coefficients defining a blend between a foreground color and a background color, the apparatus comprising: means for accepting a scan line of the image information, the scan line including blend coefficients defining a blend between the foreground color and the background color and further including at least two samples of the blend coefficients per sub-pixel element; means for applying first filters to sets of the samples of the blend coefficients, thereby generating new samples having values that are derived from the filtering of the sets of samples; means for each of the sub-pixel elements, for applying second filters to the new samples to generate a filtered blend coefficient associated with each sub-pixel element, the second filter from which the filtered blend coefficient for a given sub-pixel element is derived being spatially displaced from the second filters applied for other sub-pixel elements; and means for applying the foreground color and the background color to each of the filtered blend coefficients to generate color values associated with the sub-pixel elements.
16. The apparatus of claim 15 wherein the scan line includes exactly two samples per sub-pixel element.
17. The apparatus of claim 15 wherein at least one of the foreground and background color changes as a function of a position of the image.
18. A machine readable medium having stored instructions which, when executed by a machine used in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements of different colors per pixel, performs the method of claim 1.
19. A machine readable medium having stored instructions which, when executed by a machine used in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements of different colors per pixel, performs the method of claim 2.
20. A machine readable medium having stored instructions which, when executed by a machine used in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements of different colors per pixel, performs the method of claim 5.
21. A machine readable medium having stored instructions which, when executed by a machine used in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements of different colors per pixel, performs the method of claim 7.
22. A machine readable medium having stored instructions which, when executed by a machine used in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements of different colors per pixel, performs the method of claim 8.
23. A machine readable medium having stored instructions which, when executed by a machine used in a system for rendering an image on a device having a plurality of pixels and a plurality of separately controllable sub-pixel elements of different colors per pixel, performs the method of claim 11.
24. The method of claim 1 , wherein: the device having a plurality of pixels comprises a liquid crystal display device; the plurality of separately controllable sub-pixel elements per pixel include a red sub-pixel element, a green sub-pixel element, and a blue sub- pixel element; and the second filter applied for each of the sub-pixel elements is a box filter centered about the particular sub-pixel element for which the box filter is applied and extends to an adjacent sub-pixel element on either side of said particular sub-pixel element.
25. The method of claim 5, wherein: the device having a plurality of pixels comprises a liquid crystal display device; the plurality of separately controllable sub-pixel elements per pixel include a red sub-pixel element, a green sub-pixel element, and a blue sub- pixel element; and the second filter applied for each of the sub-pixel elements is a box filter centered about the particular sub-pixel element for which the box filter is applied and extends to an adjacent sub-pixel element on either side of said particular sub-pixel element.
26. The method of claim 7, wherein: the device having a plurality of pixels comprises a liquid crystal display device; the plurality of separately controllable sub-pixel elements per pixel include a red sub-pixel element, a green sub-pixel element, and a blue sub- pixel element; and the second filter applied for each of the sub-pixel elements is a box filter centered about the particular sub-pixel element for which the box filter is applied and extends to an adjacent sub-pixel element on either side of said particular sub-pixel element. STATEMENT UNDER ARTICLE 19
Please amend the claims in the above-identified application by canceling sheets 35 - 43 of this application which contain the claims and abstract. Please substitute therefore, sheets 35 - 41, attached hereto, which contain the new claims to be entered in this application. Claims 5-7, 15-19, 22, 27-29, 32, and 37-39 have been cancelled and new claims 40-42 have been added. The remaining claims have been renumbered. Attached herewith is a claim chart comparing the old claim numbering to the new claim numbering. The abstract is identical to the abstract as set forth in the invitation.
The claims submitted herewith place this application into conformity with the amendments as allowed in the U.S. application.
PCT/US2000/000804 1999-01-12 2000-01-12 Methods, apparatus and data structures for enhancing resolution images to be rendered on patterned display devices WO2000042762A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2000594248A JP4667604B2 (en) 1999-01-12 2000-01-12 Method, apparatus and data structure for increasing the resolution of an image rendered on a patterned display device
AU32083/00A AU3208300A (en) 1999-01-12 2000-01-12 Methods, apparatus and data structures for enhancing the resolution of images tobe rendered on patterned display devices
DE60040209T DE60040209D1 (en) 1999-01-12 2000-01-12 METHOD AND DEVICE FOR IMPROVING THE RESOLUTION OF IMAGES SUBJECT TO STRUCTURED DISPLAY DEVICES
EP00909900A EP1157538B1 (en) 1999-01-12 2000-01-12 Methods and apparatus for enhancing the resolution of images to be rendered on patterned display devices

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11557299P 1999-01-12 1999-01-12
US60/115,572 1999-01-12
US09/364,365 1999-07-30
US09/364,365 US6393145B2 (en) 1999-01-12 1999-07-30 Methods apparatus and data structures for enhancing the resolution of images to be rendered on patterned display devices

Publications (3)

Publication Number Publication Date
WO2000042762A2 WO2000042762A2 (en) 2000-07-20
WO2000042762A3 WO2000042762A3 (en) 2000-12-21
WO2000042762B1 true WO2000042762B1 (en) 2001-01-18

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US (1) US6393145B2 (en)
EP (1) EP1157538B1 (en)
JP (1) JP4667604B2 (en)
AT (1) ATE408215T1 (en)
AU (1) AU3208300A (en)
DE (1) DE60040209D1 (en)
WO (1) WO2000042762A2 (en)

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