83 lines
2.8 KiB
Python
83 lines
2.8 KiB
Python
#!/usr/bin/env python
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# *-----------------------------------------------------------------------*
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# | |
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# | Copyright (c) 2022 by Paul Scherrer Institute (http://www.psi.ch) |
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# | Based on Zac great first implementation |
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# | Author Thierry Zamofing (thierry.zamofing@psi.ch) |
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# *-----------------------------------------------------------------------*
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'''
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coordinate systems, optical center, xray axis, pixel sizes etc.
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'''
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class gepmetry:
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def __init__(self):
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pass
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def find_optical_center(p):
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# p is an array of
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# at zoom out: (p1x,p1y),(p2x,p2y),(p3x,p3y),...
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# at zoom in : (p1x,p1y),(p2x,p2y),(p3x,p3y),...
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#
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# the pixel positions are given in chip pixel coordinates (0/0= top/right)
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# and ignore roi and binning
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# the returned (cx,cy) is the pixel koordinate that does not change with zoom
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# this coordinate represents also the origin of other coordinates
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pass
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def zoom2pixsz(zoom):
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# this returns the pixel size at a given zoom level
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# the returned value is a 2x2 matrix:
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# [pxx pxy]
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# [pyx pyy] which is interpolated out of a lookup table
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#
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# [pxx pxy] [nx]
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# [pyx pyy]*[ny] results in a vector in meter of a vector [nx,ny] pixels in x and y direction
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pass
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def set_zoom2pixsz():
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#tx: 2d-vector in m when moving px pixel in x direction
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#ty: 2d-vector in m when moving py pixel in y direction
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# the _lut_z2p is dictionaty a lookuptable
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# zoom {1,200,400,600,800,1000}
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#[pxx pxy]
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#[pyx pyy]
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self._lut_z2p=_lut_z2p={
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'zoom': np.array((1,200,400,600,800,1000),dtype=np.float32),
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'pixsz': np.array(
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#((pxx,pxy),(pyx,pyy)), # zoom n
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(( 1,0),(0, 1)), # zoom 1
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(( 2,0),(0, 2)), # zoom 200
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(( 4,0),(0, 4)), # zoom 400
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(( 6,0),(0, 6)), # zoom 600
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(( 8,0),(0, 8)), # zoom 800
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((10,0),(0,10)), # zoom 1000
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dtype=np.float32)}
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def autofocus():
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# cam camera object
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# mot motor object
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# rng region (min max relative to current position) to seek
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# n number of images to take in region
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# roi region of interrest to calculate sharpness
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# mode mode to calculate sharpness (sum/max-min/hist? of edge detection in roi)
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pass
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def pix2pos(p,zoom=None):
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# returns the position m(x,y) in meter relative to the optical center at a given zoom level of the pixel p(x,y)
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# if zoom=None, the last zoom value is used
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pass
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def pos2pix(p,zoom=None):
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# returns the pixel p(x,y) of the position m(x,y) in meter relative to the optical center at a given zoom level
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# if zoom=None, the last zoom value is used
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pass
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def optctr2xray():
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# returns the vector m(x,y) of the optical center to the xray
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pass
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