COMPARITIVE DISPLAY OF IMAGES IN COLOR

• US 3,673,317 A
• Filed: 12/30/1970
• Issued: 06/27/1972
• Est. Priority Date: 12/30/1970
• Status: Expired due to Term

• Current Assignee: George F. Newell, Paul G. Kennedy
• Original Assignee: George F. Newell, Paul G. Kennedy
• Inventors: Newell, George F., Kennedy, Paul G.
• Primary Examiner(s): Murray, Richard
• Application Number:
  US05/102,621
• Time in Patent Office: 545 Days
• Field of Search: 178/5.2,5.4,6.6A,6.8,DIG.33
• US Class Current: 348/29
• CPC Class Codes: H04N 9/43 Conversion of monochrome picture signals to colour picture signals for colour picture display

Abstract

A system for the comparative display of video information wherein first video signals, e.g. corresponding to a first X-ray image, are compared with second video signals, e.g. corresponding to a second X-ray image, are applied to a display, such as a color television monitor, in such fashion that the difference between the first and second images is displayed in color while the common portion thereof are displayed in gray tones.

Claims

1. In a system for the comparative display of video signals the combination of:

means for providing first video signals corresponding to a first video image and second video signals corresponding to a second video image;

color display means including first, second and third primary color means respectively responsive to video signals applied thereto for effecting the display of the corresponding primary color on said color display means; and

means for applying said first video signals to said first primary color means and said second video signals to said second and third primary color means so that the differences between said first and second images are displayed by said color display means in color and the common portions thereof are displayed in gray tones.

2. The combination of claim 1 wherein:

said means for providing includes recording means for recording said first video signals on a first track thereof.

3. The combination of claim 2 wherein:

said recording means includes a second track for recording said second video signals.

4. The combination of claim 1 wherein:

said means for providing include television camera means for scanning said first and second images to provide said first and second video signals, and recording means for recording said first and second video signals on first and second tracks respectively thereof, said recording means includes a synchronizing track having synchronizing signals prerecorded thereon for synchronizing said television camera means, said recording means and said display means.

5. The combination of claim 4 wherein said means for producing includes first switch means for selectively enabling the recording of selected fields of video signals on respective tracks of said recording means in response to said synchronizing signals, and second switch means for selectively effecting the comparison of video signals from selected tracks of said recording means.

6. The combination of claim 1 wherein:

said means for applying includes means responsive to said first and second video signals for applying said first video signal plus a portion of the difference between said first and second video signals to said first primary color means and said first video signals less a portion of the difference between said first and second video signals to said second and third primary color means respectively.

7. The combination of claim 6 wherein:

said means responsive to said first and second video signals includes means for controlling the amplitude of the difference between said first and second video signals so that the portion of the difference is controlled in such a manner that the color saturation of the displayed difference can be controlled.

8. The combination of claim 6 wherein:

said means responsive to said first and second video signals includes first summing means for providing difference signals in response to the difference between said first and second video signals, means for controlling the amplitude of said difference signals, second summing means for adding said first video signals with said amplitude controlled difference signals to supply said first primary color means, third summing means for differencing said first video signals and said amplitude controlled difference signals to supply said second primary color means, and fourth summing means for differencing said first video signals and said amplitude controlled difference signals to supply said third primary color means.