Title:
FILTER
Document Type and Number:
Japanese Patent JP2756420
Kind Code:
B2
Abstract:
PURPOSE: To obtain the inexpensive filter with a simple structure by which noise is reduced and an image ridge is emphasized.
CONSTITUTION: The filter 1 is provided with an image ridge detection circuit 6 connected between outputs of the 1st and 2nd processing circuit means 2, 3 and with an image ridge emphasis circuit 7 connected between the output of the image ridge detection circuit and a noise reduction circuit 5 in addition to the 1st and 2nd processing circuit means 2, 3 receiving a digital image signal, a noise detection circuit 4, the noise reduction circuit 5 and an output of the image ridge emphasis circuit 7 is an output of the filter 1.
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Inventors:
MANUSO MASSIMO (IT)
POLUZZI RINALDO (IT)
RIZZOTTO GIANGUIDO (IT)
POLUZZI RINALDO (IT)
RIZZOTTO GIANGUIDO (IT)
Application Number:
JP3357595A
Publication Date:
May 25, 1998
Filing Date:
February 22, 1995
Export Citation:
Assignee:
ST MICROELECTRONICS SRL (IT)
International Classes:
G06T5/20; H03H21/00; H04N1/409; H04N5/21; (IPC1-7): G06T5/20; H04N1/409
Domestic Patent References:
| JP4294466A | ||||
| JP4188283A | ||||
| JP563974A | ||||
| JP5145759A |
Attorney, Agent or Firm:
Soga Doteru (6 people outside)
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