High resolution image processor with multiple bus architecture

• US 5,592,237 A
• Filed: 11/04/1994
• Issued: 01/07/1997
• Est. Priority Date: 11/04/1994
• Status: Expired due to Fees

• Current Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Original Assignee: InfiMed, Inc. (New York) (Siemens AG)
• Inventors: Schoppe, Donald W., Beardslee, Andrew W., Lutz, Norman M., Breithaupt, David, Greenway, William C., Nguyen, Minh N., Stevener, Timothy L.
• Primary Examiner(s): Peng, John K.
• Assistant Examiner(s): Murrell, Jeffrey S.
• Application Number:
  US08/334,577
• Time in Patent Office: 795 Days
• Field of Search: 348/715, 348/716, 348/718, 348/719, 348/162, 348/231, 348/426, 348/555, 348/572, 348/552, 348/913, 345/189, 345/190, 345/200, 345/201, 395/309, 395/311, 395/312, 395/497.02, 395/164, 395/166, 358/909.1
• US Class Current: 348/716
• CPC Class Codes: G06T 3/40 Scaling of whole images or parts thereof, e.g. expanding or contracting
• CPC Class Codes: H04N 19/124 Quantisation
• CPC Class Codes: H04N 19/126 Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
• CPC Class Codes: H04N 19/60 using transform coding
• CPC Class Codes: H04N 5/14 Picture signal circuitry for video frequency region cameras or camera modules comprising electronic image sensors, or control thereof H04N23/00
• CPC Class Codes: H04N 5/32 Transforming X-rays cameras or camera modules for generating image signals from X-rays H04N23/30; circuitry of SSIS for transforming X-rays into image signals H04N25/30
• CPC Class Codes: H04N 5/77 between a recording apparatus and a television camera
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver

Abstract

A multiple video data bus architecture permits high speed data transfer among the various circuit elements of a fluoroscopic imaging processor. This permits simultaneous acquisition, storage, display, and image enhancement of high resolution, i.e., 2K×2K images. A memory interface circuit compresses the video data for storage in bulk memory. The processor supports several high-resolution monitors which can respectively display radiographic images from different subjects, so that review and diagnosis can occur remotely.

Claims

1. High resolution digital image storage and processing arrangement for capturing, storing, enhancing and displaying a series of video images produced by a high resolution video imager that delivers image signals having a density of 2048 lines per frame and for furnishing said video image signals to a high resolution image display device, comprising:

a) A/D circuit means for converting said video image signals to a digital image signal as a sequence of digital bytes at a density of 2048 pixels per line of said video image signal;

b) display circuit means for providing said video image signal to said image display device including onboard memory means for temporarily storing at least one frame of said digital image signal, and buffering means for providing said video image signal to said display device at a frame rate independent of the frame rate of the digital image signal supplied to said display circuit means;

c) image processor circuit means including video memory means for storing at least one frame of said digital image signal and image enhancement means for creating an enhanced video image based on the digital image signal stored in said video memory means;

d) memory interface circuit means for writing frames of said digital image signal onto a bulk data storage medium and for reading frames of the digital image signal from said storage medium;

e) system controller means for generating control signals to control flow of said digital image signal between the A/D circuit means, said display circuit means, said image processor circuit means and said memory interface circuit means;

f) a user interface device permitting a user to select an operational mode, and means generating a control signal based on the operational mode selected;

g) a digital control bus coupled to said A/D circuit means, said display circuit means, said image processor circuit means, said memory interface circuit means, said system controller means and said user interface device for carrying control signals between said system controller means and said A/D circuit means, said display circuit means, said image processor circuit means, and said memory interface circuit means; and

h) a plurality of parallel independently addressable data buses each of which is coupled to a respective data bus interface on each of said A/D circuit means, said display circuit means, said image processor circuit means, and said memory interface circuit means.

2. High resolution digital image storage and processing arrangement according to claim 1, wherein said plurality of data buses includes five BTL data buses, and each of said A/D circuit means, said display circuit means, said image processor circuit means, and said memory interface circuit means includes five BTL bus interface circuits connected to respective data ports of said BTL data buses.

3. High resolution digital image storage and processing arrangement according to claim 1 wherein said display circuit means includes an on-board video image memory, means coupling said on-board video image memory to an associated bus interface device for receiving the digital image signal from any of said plurality of data buses;

a video processor coupled to said on-board video image memory and to a control bus interface that is coupled to said digital control bus; and

a video output device having data input means coupled to said video image memory and control input means coupled to said video processor, and an output supplying a high-resolution output video signal to an associated display device to produce a high resolution image thereon.

4. High resolution digital image storage and processing arrangement according to claim 3, said display circuit means further including image synchronizer means for generating a vertical frame rate for said output video signal that is independent of the rate at which the digital image signal is supplied over said bus interface device to said video image memory.

5. High resolution digital image storage and processing arrangement according to claim 3, wherein said display circuit means further includes an overlay image memory coupled to said video output device and a text and graphics generator coupled to said overlay image memory for generating overlay text and graphics so that said video output device generates said output video signal with text and graphics superimposed on said high resolution image.

6. High resolution digital image storage and processing arrangement according to claim 1, wherein said image processor circuit means includes non-linear image enhancement transform means for transforming the stored digital image signals to produce an enhanced video image.

7. High resolution digital image storage and processing arrangement according to claim 6, wherein said image processor circuit means includes a control bus interface coupled to said digital control bus;

data bus interface means coupled to said plurality of data buses; and

crossbar switch means coupled to said control bus interface, said data bus interface means, said non-linear image enhancement transform means, and said means for storing at least two frames of said digital image signal.

8. High resolution digital image storage and processing arrangement according to claim 1, wherein said memory interface circuit means includes data compression means for converting said digital image signal to a compressed form for recording the recorded signal to a decompressed form when played back from said bulk data storage medium.

9. High resolution digital image storage and processing arrangement according to claim 8, wherein said data compression means includes first and second channels for compressing and recording a frame of said video image signal, and simultaneously playing back and decompressing another frame of said video image signal.