3859515

Information

• Patent Grant
• 3859515

• References
• Source

• Patent Number

  3,859,515

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1975
  50 years ago

• CPC

  • G06F17/145 - Square transforms
  • G06K9/00187 - Preprocessing; feature extraction
  • G06K9/522 - Frequency domain transformation; Autocorrelation

• US Classifications

  • 708 - Electrical computers: arithmetic processing and calculating
  • 324 - Electricity: measuring and testing
  • 340 - Communications: electrical
  • 382 - Image analysis