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IPC Subgroup
H04N 25/671

for non-uniformity detection or correction

Introduced: January 2023

Full Title

Circuitry of solid-state image sensors [SSIS]; Control thereof > Noise processing, e.g. detecting, correcting, reducing or removing noise > applied to fixed-pattern noise, e.g. non-uniformity of response > for non-uniformity detection or correction

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
PICTORIAL COMMUNICATION, e.g. TELEVISION

3 direct subcodes

Child Classifications

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  • H04N 25/672 between adjacent sensors or output registers for reading a single image
  • H04N 25/677 for reducing the column or line fixed pattern noise

Top Applicants

Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. QUALCOMM US 97,396
  2. HUAWEI TECHNOLOGIES COMPANY CN 96,502
  3. SAMSUNG ELECTRONICS COMPANY KR 86,981
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
  5. HUAWEI TECHNOLOGIES COMPANY 55,349
  6. LG ELECTRONICS KR 53,649
  7. CANON 33,341
  8. SONY CORPORATION JP 32,761
  9. ZTE CORPORATION CN 32,274
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327