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LSST Data Management Base Package
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lsst.afw.math._warper Namespace Reference

Classes

class  Warper
 
class  WarperConfig
 

Functions

 computeWarpedBBox (destWcs, srcBBox, srcWcs)
 

Variables

int _DefaultInterpLength = 10
 
int _DefaultCacheSize = 1000000
 

Function Documentation

◆ computeWarpedBBox()

lsst.afw.math._warper.computeWarpedBBox ( destWcs,
srcBBox,
srcWcs )
Compute the bounding box of a warped image.

The bounding box includes all warped pixels and it may be a bit oversize.

Parameters
----------
destWcs : `lsst.afw.geom.SkyWcs`
    WCS of warped exposure
srcBBox : `lsst.geom.Box2I`
    parent bounding box of unwarped image
srcWcs : `lsst.afw.geom.SkyWcs`
    WCS of unwarped image

Returns
-------
destBBox: `lsst.geom.Box2I`
    bounding box of warped exposure

Definition at line 32 of file _warper.py.

32def computeWarpedBBox(destWcs, srcBBox, srcWcs):
33 """Compute the bounding box of a warped image.
34
35 The bounding box includes all warped pixels and it may be a bit oversize.
36
37 Parameters
38 ----------
39 destWcs : `lsst.afw.geom.SkyWcs`
40 WCS of warped exposure
41 srcBBox : `lsst.geom.Box2I`
42 parent bounding box of unwarped image
43 srcWcs : `lsst.afw.geom.SkyWcs`
44 WCS of unwarped image
45
46 Returns
47 -------
48 destBBox: `lsst.geom.Box2I`
49 bounding box of warped exposure
50 """
51 srcPosBox = lsst.geom.Box2D(srcBBox)
52 destPosBox = lsst.geom.Box2D()
53 for inX in (srcPosBox.getMinX(), srcPosBox.getMaxX()):
54 for inY in (srcPosBox.getMinY(), srcPosBox.getMaxY()):
55 destPos = destWcs.skyToPixel(srcWcs.pixelToSky(inX, inY))
56 destPosBox.include(destPos)
57 destBBox = lsst.geom.Box2I(destPosBox, lsst.geom.Box2I.EXPAND)
58 return destBBox
59
60
A floating-point coordinate rectangle geometry.
Definition Box.h:413
An integer coordinate rectangle.
Definition Box.h:55

Variable Documentation

◆ _DefaultCacheSize

int lsst.afw.math._warper._DefaultCacheSize = 1000000
protected

Definition at line 62 of file _warper.py.

◆ _DefaultInterpLength

int lsst.afw.math._warper._DefaultInterpLength = 10
protected

Definition at line 61 of file _warper.py.