Image display system and method

• US 4,749,990 A
• Filed: 11/22/1985
• Issued: 06/07/1988
• Est. Priority Date: 11/22/1985
• Status: Expired due to Fees

• Current Assignee: Computer Design and Applications Incorporated
• Original Assignee: Computer Design and Applications Incorporated
• Inventors: Birkner, David A.
• Primary Examiner(s): Birmiel, Howard A.
• Application Number:
  US06/800,987
• Time in Patent Office: 928 Days
• Field of Search: 367/71, 367/72, 364/421, 364/515, 340/717, 340/799, 340/750, 340/723
• US Class Current: 345/537
• CPC Class Codes: G06T 1/20 Processor architectures; Processor configuration, e.g. pipelining
• CPC Class Codes: G09G 5/393 Arrangements for updating the contents of the bit-mapped memory

Abstract

The present invention generally provides an image display system having display means, image memory means for storing image data in the form of rows and columns of pixels with each pixel having a value representing the intensity level thereof, processor means for processing the image data on a selectable basis and in a selectable manner, and display memory means for receiving and storing image data from the processor means for use by the display means. The method of the present invention provides for displaying images from image data in the form of rows and columns of pixels with each pixel having a value representing the intensity level thereof, comprising the steps of: storing the image data in a random access memory means; selectively reading the image data from the random access memory means; selectively processing the image data read form the random access memory means; storing the processed image data in a display memory means for display purposes; and displaying the stored processed image data.

Claims

1. An image display system, comprising:

display means;

random access image memory means for storing image data in the form of rows and columns of pixels with each pixel having a value representing the intensity level thereof;

processor means for processing said image data on a selectable basis and in a selectable manner; and

random access display memory means for receiving and storing image data from said processor means for use by said display means, wherein said processor means includes pipelined means for processing said pixelled image data during transfer from said image memory means to said display memory means.

2. The systems of claim 1, further comprising:

a host computer;

terminal means for enabling control of said processor means via said host computer;

control bus coupled to said host computer, said image memory means, said processor means, said terminal means and said display memory means;

random access bus means coupled to said image memory means and said processor means; and

screen memory bus means coupled between said processor means and said screen memory means.

3. The system of claim 2, wherein said image memory means includes means for storing other data in addition to said image data, said other data including image data access paths and textual data describing the image data stored therewith.

4. The system of claim 2, wherein said terminal means includes terminal emulator means coupled to said screen memory means for allowing use of said display means as a terminal display means in the control of said host computer and thereby said processor means.

5. The system of claim 2, wherein said display means includes means for displaying each pixel of said image data at one of a predetermined number of relative intensity levels, further wherein said values stored in said image memory for each said pixel represent a larger number of relative intensity levels than said predetermined number, and still further wherein said processor means includes means for selecting a range of said pixel values to be displayed from said image memory and for scaling the selected pixel values to the range of relative intensity levels that are displayable by said display means.

6. The system of claim 2, wherein said processor means includes means for updating image data stored in said display memory means, for causing the image displayed therefrom to show movement.

7. The system of claim 6, wherein said means for updating includes for causing said movement to appear as relative movement between different portions of the image displayed.

8. The system of claim 6, wherein said means for updating includes means for causing said movement to appear as movement of the displayed image around different portions of an undisplayed larger image.

9. The system of claim 2, wherein said processor means includes for combining and transferring image data from a plurality of separate images, as stored in said image memory means, into said display memory means for display as a single image.

10. The system of claim 9, wherein said image memory means includes means for storing overlay graphics data for selection and use by said processor means in combination with said image data.

11. The system of claim 10, wherein said overlay graphics data is stored in said image memory means with sixteen levels of relative intensity.

12. The system of claim 1, wherein said processor means includes a microword processor means for controlling said pipelined means for processing.

13. The system of claim 12, wherein said pipelined means for processing includes means for enlarging image data stored in said image memory by interpolating data for additional pixels for location between pixels stored in said rows and columns in said image memory means.

14. The system of claim 12, wherein said display means includes means for displaying each pixel of said image data at one of a predetermined number of relative intensity levels, further wherein said values stored in said image memory for each said pixel represent a larger number of relative intensity levels than said predetermined number, and still further wherein said pipelined means for processing includes means for selecting a range of said pixel values to be displayed from said image memory and for scaling the selected pixel values to the range of relative intensity levels that are displayable by said display means.

15. The system of claim 12, wherein said processor means includes means for updating image data stored in said display memory means, for causing the image displayed therefrom to show movement.

16. A method of displaying images from image data in the form of rows and columns of pixels with each pixel having a value representing the intensity level thereof, comprising the steps of:

storing said image data in a random access memory;

selectively reading said image data from said random access memory;

selectively processing said image data read from said random access memory through a pipelined means for processing;

storing said processed image data in a random access display memory for display purposes; and

displaying said stored processed image data.

17. The method of claim 16, wherein said step of processing said image data through said pipelined means for processing includes selectably using interpolation for changing the size of the image presented, selecting a range of intensity levels and mapping those intensity levels for display purposes and selectively combining image data with overlay graphics data also stored in said random access memory.

18. The method of claim 17, wherein said step of processing includes repetetively updating said processed image data stored in said display memory for causing the image displayed therefrom to show movement.