Changes between Version 4 and Version 5 of Image_Artifacts
- Timestamp:
- Jul 28, 2009, 4:17:28 PM (17 years ago)
Legend:
- Unmodified
- Added
- Removed
- Modified
-
Image_Artifacts
v4 v5 38 38 == Jagged noise == 39 39 40 These jagged noise lines are not stable in position or time, moving and changing brightness between exposures. 40 These jagged noise lines are not stable in position or time, moving and changing brightness between exposures. Their cause is unknown, and no measures are in place to address them. 41 41 42 42 [[Image(jaggy_noise.png)]] 43 43 44 == Tiltystreaks == 44 == Pattern noise == 45 46 RFI or other conditions in the readout electronics cause a variable signal in the readout of each row. We initially attempted to address this in software using a program written by the Camera group, tiltystreaks. This produced more artifacts and was not particularly stable. We now use a polynomial subtraction of each row (with appropriate outlier rejection) in ppImage. 45 47 46 48 [[Image(tiltystreaks.png)]]
