Displaying static images using spatially displaced sampling with semantic data

• US 20030210834A1
• Filed: 05/13/2002
• Published: 11/13/2003
• Est. Priority Date: 05/13/2002
• Status: Abandoned Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Narayanan, Raman, Duggan, Michael, Hitchcock, Gregory, Stamm, Beat, Linnerud, Paul
• Application Number:
  US10/145,317
• Publication Number:
  US 20030210834A1
• Time in Patent Office: Days
• US Class Current: 382/299
• CPC Class Codes: G06T 3/403 Edge-driven scaling; Edge-based scaling
• CPC Class Codes: G09G 2340/0421 Horizontal resolution change
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 5/24 Generation of individual character patterns

Abstract

Methods and systems for utilizing metadata to preserve semantic information related to an image to allow a static version of the image to be displayed with sub-pixel precision on display devices having pixels with separately controllable pixel sub-components. A static version of an image can be displayed on a display device having a relatively low resolution, such as those associated with handheld devices, while maintaining the sub-pixel precision positioning. The image is displayed on a display device, such as a liquid crystal display device, having separately controllable pixel sub-components. The sub-pixel precision positioning is used to map spatially different sets of samples to individual pixel sub-components rather than to entire pixels, resulting in image features, such as character edges, being displayed at pixel sub-component boundaries, rather than always at boundaries between full pixels.

Claims

1. In a processing device associated with a display device that has a plurality of pixels, each pixel having a plurality of separately controllable pixel sub-components, a method of displaying an image on the display device, comprising the acts of:

accessing image data that defines an image;

converting the image data to a data format that includes font attributes defining character features and that includes information having a first resolution defining a layout of the image; and

using the converted image data, displaying the image on a display device having a second resolution that is lower than the first resolution, wherein the pixel sub-components of the pixels represent spatially different portions of the image and wherein at least some of the character features are displayed with sub-pixel precision on the display device.

2. The method of claim 1 wherein the act of displaying the image comprises displaying the image such that an edge of a character is displayed at a boundary between individual pixel sub-components of the same pixel.

3. The method of claim 1, wherein the data format allows the image data to be stored in a binary format for display on the display device.

4. The method of claim 1, wherein the data format allows the image data to be serialized.

5. The method of claim 1, wherein the data format allows the image to be displayed in a device-independent manner.

6. The method of claim 1, wherein displaying the image on the display device comprises printing a binary version of the image on the display device.

7. The method of claim 1, wherein the data format comprises a metafile format.

8. The method of claim 1, wherein the data format comprises an enhanced metafile format.

9. The method of claim 8, wherein the enhanced metafile format allows storage of graphics device interface commands related to the image.

10. The method of claim 1, wherein the act of converting the image data comprises the act of creating a pickled version of the image data that includes said information having the first resolution defining a layout of the image, said information having the first resolution comprising recorded application program interface calls that define the layout of the image in a device-independent manner.

11. In a processing device associated with a display device that has a plurality of pixels each having a plurality of separately controllable pixel sub-components, a method of displaying an image on the display device, comprising the acts of:

converting image data that defines an image to a data format that includes;

graphics attributes defining features of the image; and

information defining positions of features of the image in a first coordinate space having a first resolution; and

using the graphics attributes and the information defining the position of the features of the image, displaying the image with sub-pixel precision on a display device having a second resolution that is lower than the first resolution, wherein the information defining the position of the features in the coordinate space having the first resolution is used to determine the position of the features with sub-pixel precision in a second coordinate space of the display device having the second resolution.

12. The method of claim 11, wherein the act of displaying the image includes the act of mapping samples of the converted image data to pixel sub-components of the display device.

13. The method of claim 11 wherein the display device comprises a liquid crystal display (LCD) device, wherein the act of displaying the image includes the act of overscaling the converted image data in a direction perpendicular to stripes of same-colored stripes of pixel sub components of the LCD device.

14. The method of claim 11, wherein the display device comprises a liquid crystal display (LCD) device, wherein the act of displaying the image includes the act of sampling an image to obtain a plurality of samples in order to determine luminosity intensity values to be applied to the pixel sub-components of the LCD display device.

15. The method of claim 14, wherein the pixel sub-components form a plurality of same-colored stripes on the display device, wherein the act of sampling information includes the act of obtaining more samples in the direction perpendicular to the pixel sub-component striping than in the direction of the pixel sub-component striping.

16. The method of claim 11, wherein the act of processing the converted image includes the act of filtering the image data using overlapping color filters.

17. The method of claim 11, wherein the graphics attributes comprise font attributes and include character information.

18. The method of claim 11, wherein the graphics attributes includes color information.

19. The method of claim 11, wherein the graphics attributes includes image size information.

20. The method of claim 11, wherein the information defining positions of character features of the image in a first coordinate space having a first resolution comprise recorded application program interface calls that define a layout of the image in a device-independent manner.

21. A computer program product for implementing, in a computer system including a processing device and a display device for displaying an image, the display device having a plurality of pixels, wherein each pixel has a plurality of separately controllable pixel sub-components, a method of displaying an image on the display device, the computer program product comprising:

a computer-readable medium carrying computer executable instructions for performing the method, wherein the method includes the acts of;

converting image data that defines an image to a metafile format that includes font attributes defining character features and that includes information having a first resolution defining a layout of the image; and

processing the converted image data utilizing the font attributes and the information having the first resolution so as to display the image on a display device having a second resolution that is lower than the first resolution, including the acts of;

mapping samples of the converted image data to individual pixel sub-components utilizing the font attributes; and

displaying the image on the display device such that at least some of the character features are displayed with sub-pixel precision on the display device.

22. A computer program product as defined in claim 21, wherein the display device comprises a liquid crystal display (LCD) wherein the act of processing the converted image includes the act of overscaling the converted image data in the direction perpendicular to stripes of the LCD display device to create an overscaled representation of the image.

23. A computer program product as defined in claim 21, wherein the act of processing the converted image data includes the act of sampling information representing the image so as to obtain a plurality of samples that specify luminous intensity values to be applied to pixel sub-components of the display device.

24. A computer program product as defined in claim 23, wherein the samples are obtained using the information having the first resolution such that the samples can be mapped to the individual pixel sub-components with sub-pixel precision.

25. A computer program product as defined in claim 21, wherein the method further comprises the act of filtering the image data using overlapping color filters.

26. In a processing device associated with a display device that has a plurality of pixels, wherein each pixel has a plurality of separately controllable pixel sub-components, a method of displaying an image on the display device, comprising the acts of:

accessing image data stored in a first format that defines an image;

converting the image data from the first format to a second format that represents a pickled version of the image, while maintaining font attributes defining character features of the image, the picked version of the image including information having a first resolution defining a layout of the image in a device-independent manner;

processing the font attributes and the information having the first resolution to obtain a plurality of samples representing the image, the samples having a resolution that is greater than a second resolution defined by the pixels of the display device;

mapping spatially different sets of the samples to individual pixel sub-components of the pixels of the display device so as to define luminous intensity values that control the pixel sub-components; and

displaying the image on the display device using the defined luminous intensity values, the image being displayed on the display device with sub-pixel precision.

27. The method of claim 26, wherein the display device comprises a liquid crystal display device.

28. The method of claim 27, wherein the pixel sub-components comprise a red sub-component, a blue sub-component, and a green sub-component.

29. The method of claim 28, wherein the pixel sub-components are arranged in stripes of same-colored pixel sub-components on the display device.

30. The method of claim 26, wherein the information having a first resolution defining a layout of the image in a device-independent manner comprises recorded application program interface calls that, if executed, are capable of causing a viewer to render the image.