Introduction to Image Reduction
Introduction to Image Reduction
Introduction to Image Reduction
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Motivation & background Instrumental Signature Removal Combining multiple images Pho<strong>to</strong>metric calibration<br />
Instrumental signature removal: overview<br />
• mask: identify bad pixels/areas <strong>to</strong> eliminate them from the<br />
following computations<br />
• overscan: correct for the bias of each row<br />
• crosstalk: correct for “signals” from nearby amplifiers<br />
• debias: correct for spatial variation of bias<br />
• defringe: subtract fringe pattern due <strong>to</strong> sky lines if present<br />
• flatfield: correct for nonuniform response
Change language