US PATENT SUBCLASS 382 / 260
.~ Image filter

Current as of: June, 1999
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382 /   HD   IMAGE ANALYSIS

254  DF  IMAGE ENHANCEMENT OR RESTORATION {7}
260.~ Image filter {5}
261  DF  .~.~> Adaptive filter
262  DF  .~.~> Median filter
263  DF  .~.~> Highpass filter (i.e., for sharpening or enhancing details)
264  DF  .~.~> Lowpass filter (i.e., for blurring or smoothing)
265  DF  .~.~> Recursive filter

DEFINITION

Classification: 382/260

Image filter:

(under subclass 254) Subject matter directed to any electrical apparatus or image processing operations that enhance images by suppressing or minimizing certain spatial frequencies.

(1) Note. Optical filters are not included in this subclass. For such excluded subject matter see class 359, Optics: Systems and Elements, subclasses 885 through 892.

SEE OR SEARCH THIS CLASS, SUBCLASS:

210, for holos:graphic spatial filters.

SEE OR SEARCH CLASS

333, Wave Transmission Lines and Networks,

165, 212 for time or frequency domain filters.

359, Optics: Systems and Elements,

885, 892 for optical filters. (see (1) Note, above).

455, Telecommunications,

213, 286, 307, and 339 for various electrical filters used in telecommunications.

708, Electrical Computers: Arithmetic Processing and Calculating,

300+, for digital filters.