Video display device simulation apparatus and method

• US 4,631,691 A
• Filed: 05/14/1984
• Issued: 12/23/1986
• Est. Priority Date: 05/14/1984
• Status: Expired due to Fees

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: RCA Corporation (General Electric Company)
• Inventors: Pica, Albert P.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/610,006
• Time in Patent Office: 953 Days
• Field of Search: 304/578, 304/521, 304/518, 358/10, 358/139, 358/87, 340/728
• US Class Current: 382/280
• CPC Class Codes: G06T 1/00 General purpose image data processing

Abstract

A video display device may be simulated using a computer and a conventional video image processor. A test image which is an enlarged version of a typical image to appear on the simulated display device is generated. This enlarged test image is then digitally processed to replicate the effects of the various parameters of the display device which affect the image. The processed signal representing the image is then displayed on a test monitor, which is viewed from a distance which is proportional to the degree of enlargement of the test image.

Claims

1. A method of simulating a video display device comprising the steps of:

generating a video signal representing a test image;

processing the video signal so as to replicate the effect that the display device has on the video signal; and

displaying the processed video signal on a video monitor.

2. The method as in claim 1 wherein the processing step includes digitizing the video signal, storing the digitized signal representing the test image, and arithmetically processing said stored image to replicate the effect of the display device.

3. The method as in claim 2 wherein the processing step includes convolving the digitized image with a Fourier transform of the frequency response of the display device.

4. The method as in claim 2 wherein the processing step includes masking the stored image to replicate the video scan lines onto the test image.

5. The method as in claim 2 for simulating a display device having a cathode ray tube wherein the processing step includes masking the stored image to replicate the cathode ray tube phosphor pattern onto the test image.

6. The method as in claim 2 for simulating a display device having a cathode ray tube wherein the processing step includes convolving the stored digitized image with the electron beam spot profile for the simualted display device.

7. The method as in claim 1 wherein the test image is enlarged X times with respect to the size that the image would normally have on the simulated display device and further comprising the step of viewing the displayed processed signal from a distance from the video monitor which is X times the typical viewing distance.

8. The apparatus in claim 7 wherein the replicating means comprises a video processing system including:

a digital memory for storing the test image;

a high speed digital arithmetic processor for processing the test image and for sending the test image to the memory, and

a digital-to-analog converter for translating the stored digital image into an analog signal.

9. An apparatus for simulating a video display device comprising:

a computer for controlling the simulation;

means responsive to the computer for replicating on a test image the effects of at least one parameter of the simualted display device; and

a video monitor for displaying the output from the replicating means.