Automatic background removal for input data having consecutive input points identification
US7329852B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 2006 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Jul 18, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/12784
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Automatic background signal removal for input data, such as for spectrometry data, is provided. Input data includes input pixel points, such as those read by a CCD spectrometer or chromatography device, and intensity values corresponding to the data points. A distribution of changes in the intensity values between the data points is determined, and a noise level is judged by setting a threshold for the distribution. A noise region is identified as a predetermined number of consecutive input points for which the changes in the intensity values are within the noise level. Adjacent noise regions may be connected and the background signal is thus determined and subtracted. A spike noise region may also be identified and filtered, such that a peak obtained from fewer than a second predetermined number of the pixel points is determined as a spike, not a true peak. Non-spike large amplitude noises are optionally filtered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.