Changeset 27732 for branches/pap/psLib/src/imageops/psImageCovariance.h

Timestamp:

Apr 22, 2010, 6:20:17 PM (16 years ago)

Author:

Paul Price

Message:

Need to rescale the covariance matrix when we rescale the images. The previous covariance matrices were appropriate for the *chip* stage, not the warp stage (the pixel scales are currently different). Simulations show that this produces the expected detection limits (+/- 0.1 mag, which is about the expected error; more precision probably requires inserting and recovering fake sources).

File:

• branches/pap/psLib/src/imageops/psImageCovariance.h (modified) (1 diff)

branches/pap/psLib/src/imageops/psImageCovariance.h

@@ -90 +90 @@
     );
 
+
+/// Rescale a covariance matrix following a change in plate scale
+///
+/// The covariance matrix is stretched or shrunk to match the new plate scale.
+psKernel *psImageCovarianceScale(
+    const psKernel *in,                 ///< Input covariance pseudo-matrix
+    float scale                         ///< Scale factor (output plate scale relative to input plate scale)
+    );
+
 /// Control threading for image covariance functions
 ///