/usr/lib/python3/dist-packages/ginga/rv/plugins/WCSMatch.py is in python3-ginga 2.6.1-2.
This file is owned by root:root, with mode 0o644.
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# WCSMatch.py -- WCSMatch plugin for Ginga reference viewer
#
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
#
from ginga import GingaPlugin
from ginga.gw import Widgets
from ginga.util import wcs
from ginga.misc import Bunch
class WCSMatch(GingaPlugin.GlobalPlugin):
"""
*** This plugin is experimental/alpha/testing/preview ***
WCSMatch is a global plugin for the Ginga image viewer that allows
you to roughly align images with different scales and orientations
using WCS for viewing purposes.
To use, simply start the plugin, and from the plugin GUI select a
channel from the drop-down menu labeled "Reference Channel". The
image contained in that channel will be used as a reference for
zooming and orienting the images in the other channels.
The channels will be synchronized in viewing (zoom, pan, rotate,
transform). To "unlock" the synchronization, simply select "None"
from the "Reference Channel" drop-down menu.
Currently there is no way to limit the channels that are affected
by the plugin.
"""
def __init__(self, fv):
# superclass defines some variables for us, like logger
super(WCSMatch, self).__init__(fv)
self.chnames = []
self.ref_channel = None
self.ref_image = None
self.gui_up = False
self._cur_opn_viewer = None
fv.add_callback('add-channel', self.add_channel)
fv.add_callback('delete-channel', self.delete_channel)
def build_gui(self, container):
top = Widgets.VBox()
top.set_border_width(4)
vbox, sw, orientation = Widgets.get_oriented_box(container)
vbox.set_border_width(4)
vbox.set_spacing(2)
self.msg_font = self.fv.get_font("sansFont", 12)
tw = Widgets.TextArea(wrap=True, editable=False)
tw.set_font(self.msg_font)
self.tw = tw
fr = Widgets.Expander("Instructions")
fr.set_widget(tw)
vbox.add_widget(fr, stretch=0)
fr = Widgets.Frame("WCS Match")
captions = ((' Reference Channel:', 'label',
'ref channel', 'combobox'),
)
w, b = Widgets.build_info(captions, orientation=orientation)
self.w = b
b.ref_channel.add_callback('activated', self.set_reference_channel_cb)
fr.set_widget(w)
vbox.add_widget(fr, stretch=0)
spacer = Widgets.Label('')
vbox.add_widget(spacer, stretch=1)
top.add_widget(sw, stretch=1)
btns = Widgets.HBox()
btns.set_spacing(3)
btn = Widgets.Button("Close")
btn.add_callback('activated', lambda w: self.close())
btns.add_widget(btn, stretch=0)
btns.add_widget(Widgets.Label(''), stretch=1)
top.add_widget(btns, stretch=0)
container.add_widget(top, stretch=1)
self.gui_up = True
self._reset_channels_gui()
def add_channel(self, viewer, channel):
chname = channel.name
info = Bunch.Bunch(chinfo=channel)
channel.extdata._wcsmatch_info = info
# Add callbacks to the viewer for all the scale, pan, rotation and
# transform settings changes
chviewer = channel.fitsimage
fitssettings = chviewer.get_settings()
fitssettings.getSetting('scale').add_callback('set',
self.zoomset_cb, chviewer, info)
fitssettings.getSetting('rot_deg').add_callback('set',
self.rotset_cb, chviewer, info)
for name in ('flip_x', 'flip_y', 'swap_xy'):
fitssettings.getSetting(name).add_callback('set',
self.xfmset_cb, chviewer, info)
fitssettings.getSetting('pan').add_callback('set',
self.panset_cb, chviewer, info)
self.fv.gui_do(self._reset_channels_gui)
def delete_channel(self, viewer, channel):
chname = channel.name
self.logger.debug("deleting channel %s" % (chname))
self.active = None
self.info = None
self.fv.gui_do(self._reset_channels_gui)
def _reset_channels_gui(self):
self.chnames = list(self.fv.get_channel_names())
self.chnames.sort()
self.chnames.insert(0, "None")
if not self.gui_up:
return
self.w.ref_channel.clear()
for chname in self.chnames:
self.w.ref_channel.append_text(chname)
# CALLBACKS
def redo(self, channel, image):
info = channel.extdata._wcsmatch_info
self.logger.info("Channel '%s' setting image" % (info.chinfo.name))
if info.chinfo == self.ref_channel:
self.ref_image = image
return True
def set_reference_channel_cb(self, w, idx):
chname = self.chnames[idx]
if chname == 'None':
self.ref_image = None
self.ref_channel = None
chinfo = self.fv.get_channel(chname)
self.ref_channel = chinfo
chviewer = chinfo.fitsimage
self.ref_image = chviewer.get_image()
# reset the scale base to be identical in both axes for the
# reference image
chviewer.set_scale_base_xy(1.0, 1.0)
self.scale_all_relative(chviewer, chinfo)
self.rotate_all_relative(chviewer, chinfo)
self.transform_all_relative(chviewer, chinfo)
self.pan_all_relative(chviewer, chinfo)
self.logger.info("set reference channel to '%s'" % (chname))
def close(self):
self.fv.stop_global_plugin(str(self))
return True
def instructions(self):
self.tw.set_text(WCSMatch.__doc__)
def start(self):
self.instructions()
def stop(self):
self.ref_channel = None
self.ref_image = None
self.fv.showStatus("")
def get_other_channels(self, myname):
return set(self.fv.get_channel_names()) - set([myname])
def zoomset_cb(self, setting, value, chviewer, info):
"""This callback is called when a channel window is zoomed.
"""
# Don't do anything if we are not active
if not self.gui_up or self.ref_image is None:
return
# if this is not a zoom event from the focus window then
# don't do anything
## focus_chviewer = self.fv.getfocus_viewer()
## if chviewer != focus_chviewer:
## return
if self._cur_opn_viewer is not None:
return
self._cur_opn_viewer = chviewer
try:
self.scale_all_relative(chviewer, info.chinfo)
finally:
self._cur_opn_viewer = None
def scale_all_relative(self, chviewer, chinfo):
if self.ref_image is None:
return
# get native scale relative to reference image
image = chviewer.get_image()
ort = wcs.get_relative_orientation(image, self.ref_image)
self.logger.info("scale for channel '%s' relative to ref image %f,%f" % (
chinfo.name, ort.rscale_x, ort.rscale_y))
scale_x, scale_y = chviewer.get_scale_xy()
#scale_x, scale_y = value
chg_x, chg_y = scale_x / ort.rscale_x, scale_y / ort.rscale_y
self.logger.info("scale changed for channel '%s' by %f,%f" % (
chinfo.name, chg_x, chg_y))
# for all other channels except ours
chnames = self.get_other_channels(chinfo.name)
for chname in chnames:
chinfo2 = self.fv.get_channel(chname)
# calculate scale from orientation to reference image
image = chinfo2.fitsimage.get_image()
if image is None:
continue
ort = wcs.get_relative_orientation(image, self.ref_image)
new_scale_x, new_scale_y = (ort.rscale_x * chg_x,
ort.rscale_y * chg_y)
# apply that scale
self.logger.info("changing scale for channel '%s' to %f,%f" % (
chinfo2.name, new_scale_x, new_scale_y))
chinfo2.fitsimage.scale_to(new_scale_x, new_scale_y)
def rotset_cb(self, setting, value, chviewer, info):
"""This callback is called when a channel window is rotated.
"""
# Don't do anything if we are not active
if not self.gui_up or self.ref_image is None:
return
# if this is not a zoom event from the focus window then
# don't do anything
## focus_chviewer = self.fv.getfocus_viewer()
## if chviewer != focus_chviewer:
## return
if self._cur_opn_viewer is not None:
return
self._cur_opn_viewer = chviewer
try:
self.rotate_all_relative(chviewer, info.chinfo)
finally:
self._cur_opn_viewer = None
def rotate_all_relative(self, chviewer, chinfo):
if self.ref_image is None:
return
# get native scale relative to reference image
image = chviewer.get_image()
if self.ref_image is None:
return
ort = wcs.get_relative_orientation(image, self.ref_image)
self.logger.info("rotation for channel '%s' relative to ref image %f" % (
chinfo.name, ort.rrot_deg))
rot_deg = chviewer.get_rotation()
chg_rot_deg = rot_deg + ort.rrot_deg
self.logger.info("rotation changed for channel '%s' by %f" % (
chinfo.name, chg_rot_deg))
# for all other channels except ours
chnames = self.get_other_channels(chinfo.name)
for chname in chnames:
chinfo2 = self.fv.get_channel(chname)
# Get relative rotation of their image
image = chinfo2.fitsimage.get_image()
if image is None:
continue
ort = wcs.get_relative_orientation(image, self.ref_image)
# Apply that rotation
new_rot_deg = ort.rrot_deg + chg_rot_deg
self.logger.info("changing rot for channel '%s' to %f" % (
chinfo2.name, new_rot_deg))
chinfo2.fitsimage.rotate(new_rot_deg)
def panset_cb(self, setting, value, chviewer, info):
"""This callback is called when a channel window is panned.
"""
# Don't do anything if we are not active
if not self.gui_up or self.ref_image is None:
return
# if this is not a zoom event from the focus window then
# don't do anything
## focus_chviewer = self.fv.getfocus_viewer()
## if chviewer != focus_chviewer:
## return
if self._cur_opn_viewer is not None:
return
self._cur_opn_viewer = chviewer
try:
self.pan_all_relative(chviewer, info.chinfo)
finally:
self._cur_opn_viewer = None
def pan_all_relative(self, chviewer, chinfo):
if self.ref_image is None:
return
image = chviewer.get_image()
if self.ref_image is None:
return
pan_ra, pan_dec = chviewer.get_pan(coord='wcs')
# for all other channels except ours
chnames = self.get_other_channels(chinfo.name)
for chname in chnames:
chinfo2 = self.fv.get_channel(chname)
# set pan position on their viewer
image = chinfo2.fitsimage.get_image()
if image is None:
continue
data_x, data_y = image.radectopix(pan_ra, pan_dec)
chinfo2.fitsimage.panset_xy(data_x, data_y)
def xfmset_cb(self, setting, value, chviewer, info):
"""This callback is called when a channel window is transformed
(flipped, or swap axes).
"""
# Don't do anything if we are not active
if not self.gui_up or self.ref_image is None:
return
# if this is not a zoom event from the focus window then
# don't do anything
## focus_chviewer = self.fv.getfocus_chviewer()
## if chviewer != focus_chviewer:
## return
if self._cur_opn_viewer is not None:
return
self._cur_opn_viewer = chviewer
try:
self.transform_all_relative(chviewer, info.chinfo)
finally:
self._cur_opn_viewer = None
def transform_all_relative(self, chviewer, chinfo):
if self.ref_image is None:
return
image = chviewer.get_image()
if self.ref_image is None:
return
flip_x, flip_y, swap_xy = chviewer.get_transforms()
# for all other channels except ours
chnames = self.get_other_channels(chinfo.name)
for chname in chnames:
chinfo2 = self.fv.get_channel(chname)
# set our pan position on their viewer
image = chinfo2.fitsimage.get_image()
if image is None:
continue
chinfo2.fitsimage.transform(flip_x, flip_y, swap_xy)
def redo(self):
if self.ref_image is None:
# no reference image
return
chinfo = self.fv.get_channel_info()
viewer = chinfo.fitsimage
image = viewer.get_image()
## if image == self.ref_image:
## # current image is same as reference image
## return
info = wcs.get_relative_orientation(image, self.ref_image)
self.logger.info("rscale_x=%f rscale_y=%f rrot_deg=%f" % (
info.rscale_x, info.rscale_y, info.rrot_deg))
def __str__(self):
return 'wcsmatch'
#END
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