Claims
- 1. A horizontal line interpolation apparatus comprising:
- an interpolation coefficient generation circuit for generating an interpolation coefficient for performing interpolation processing for horizontal lines of an input image signal;
- a horizontal line interpolation circuit for obtaining an output image signal by performing the interpolation processing for the horizontal lines of the input image signal based on the interpolation coefficient; and
- a noise reduction circuit for obtaining an output image of a generally uniform S/N ratio regardless of screen positions by reducing noise of the output signal of the horizontal line interpolation circuit in accordance with the interpolation coefficient.
- 2. An image pickup apparatus comprising:
- a signal processing circuit for processing an output signal of an image sensor;
- an interpolation coefficient generation circuit for generating an interpolation coefficient for performing interpolation processing for horizontal lines of an output signal of the signal processing circuit;
- a horizontal line interpolation circuit for obtaining an output image signal by performing the interpolation processing for the horizontal lines of the output signal of the signal processing circuit based on the interpolation coefficient; and
- a noise reduction circuit for obtaining an output image of a generally uniform S/N ratio regardless of screen positions by reducing noise of the output signal of the horizontal line interpolation circuit in accordance with the interpolation coefficient.
Priority Claims (4)
Number |
Date |
Country |
Kind |
2-258002 |
Sep 1990 |
JPX |
|
2-258003 |
Sep 1990 |
JPX |
|
2-285004 |
Oct 1990 |
JPX |
|
3-64476 |
Mar 1991 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/104,913, filed Aug. 12, 1993 which is in turn a divisional of application Ser. No. 07/765,036, filed Nov. 24, 1991, now U.S. Pat. No. 5,268,758.
US Referenced Citations (10)
Foreign Referenced Citations (6)
Number |
Date |
Country |
0136770A1 |
Apr 1985 |
EPX |
0225029A2 |
Jun 1987 |
EPX |
0367418A2 |
May 1990 |
EPX |
63-290014 |
Nov 1988 |
JPX |
64-81472 |
Mar 1989 |
JPX |
2-250471 |
Oct 1990 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
765036 |
Sep 1991 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
104913 |
Aug 1993 |
|