Building Earth Observation Cameras

150 Building Earth Observation Cameras

This phenomenon of spillover of electrons from a saturated pixel to the adja-

cent pixels is called blooming and appears as a white streak or blob in the

image. Thus, blooming affects both quantitative and qualitative imaging

characteristics. Some CCDs are designed with antiblooming (AB) structures.

AB structures bleed off any excess charge into a specically designed sink

before they can overow to the adjacent pixel and thereby stop blooming.

AB provision is useful when one has to observe targets with large dynamic

range. However, AB structures can reduce the effective quantum efciency

and introduce nonli ...