| 1 | from asap import rcParams
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| 2 | from asap import _n_bools, mask_and, mask_or
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| 3 | from asap.scantable import scantable
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| 4 |
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| 5 | class interactivemask:
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| 6 | """
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| 7 | The class for interactive mask selection.
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| 8 |
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| 9 | Example:
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| 10 | new_mask=interactivemask()
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| 11 | new_mask.select_mask(scan,masklist=[[0,10],[90,100]],invert=False)
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| 12 | mask=new_mask.get_mask()
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| 13 |
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| 14 | Modify mask region by selecting a region on a plot with mouse.
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| 15 | """
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| 16 |
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| 17 | def __init__(self):
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| 18 | """
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| 19 | Create a interactive masking object
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| 20 | """
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| 21 | self.scan=None
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| 22 | self.rect={}
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| 23 | self.xold=None
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| 24 | self.yold=None
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| 25 | self.xdataold=None
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| 26 | self.ydataold=None
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| 27 | self.mask=None
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| 28 | self._polygons=[]
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| 29 | self._p=None
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| 30 |
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| 31 | def select_mask(self,scan,masklist=[],invert=False):
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| 32 | """
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| 33 | Do interactive mask selection.
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| 34 | Calculate initial channel mask based on the parameters and modify
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| 35 | it interactively by adding/deleting regions with mouse drawing.
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| 36 | When finish modifying, press <Return> to calculate the final mask.
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| 37 |
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| 38 | Parameters:
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| 39 | scan: a scantable
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| 40 | masklist: [[min, max], [min2, max2], ...]
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| 41 | A list of pairs of start/end points (inclusive)
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| 42 | specifying the regions to be masked
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| 43 | invert: optional argument. If specified as True,
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| 44 | return an inverted mask, i.e. the regions
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| 45 | specified are excluded
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| 46 |
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| 47 | Interactive region selection is available only when GUI plotter
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| 48 | is active. When GUI plotter is disabled, this method only
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| 49 | calculates a initial channel mask.
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| 50 | """
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| 51 | # Verify input parameters
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| 52 | if not isinstance(scan, scantable):
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| 53 | msg = 'Input is not a scantable'
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| 54 | raise TypeError(msg)
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| 55 | if not (isinstance(masklist, list) or isinstance(masklist, tuple)) \
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| 56 | or not isinstance(invert, bool):
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| 57 | msg = 'Invalid mask definition'
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| 58 | raise TypeError(msg)
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| 59 |
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| 60 | self.scan=scan
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| 61 |
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| 62 | # Create initial mask
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| 63 | if ( len(masklist) > 0 ):
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| 64 | self.mask=self.scan.create_mask(masklist,invert=invert)
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| 65 | else:
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| 66 | self.mask=_n_bools(self.scan.nchan(),True)
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| 67 |
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| 68 | # Return if GUI is not active
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| 69 | if not rcParams['plotter.gui']:
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| 70 | print 'GUI plotter is disabled.\n'
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| 71 | print 'Exit interactive mode.'
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| 72 | return
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| 73 |
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| 74 | # Plot selected spectra
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| 75 | if not self._p or self._p.is_dead:
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| 76 | from asap.asapplotter import asapplotter
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| 77 | plotter=asapplotter()
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| 78 | self._p = plotter._plotter
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| 79 | plotter.plot(self.scan)
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| 80 | for panel in self._p.subplots:
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| 81 | xmin, xmax = panel['axes'].get_xlim()
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| 82 | marg = 0.05*(xmax-xmin)
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| 83 | panel['axes'].set_xlim(xmin-marg, xmax+marg)
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| 84 | self._p.show()
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| 85 | self._plot_mask()
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| 86 |
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| 87 | print ''
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| 88 | print 'Selected regions are shaded with yellow. (gray: projections)'
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| 89 | print 'Now you can modify the selection.'
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| 90 | print 'Draw rectangles with Left-mouse to add the regions,'
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| 91 | print 'or with Right-mouse to exclude the regions.'
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| 92 |
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| 93 | cid = None
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| 94 | cid = self._p.canvas.mpl_connect('button_press_event', self._region_start)
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| 95 | finish=raw_input('Press return to calculate statistics.\n')
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| 96 | if cid is not None:
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| 97 | self._p.canvas.mpl_disconnect(cid)
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| 98 |
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| 99 | # Finish the plot
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| 100 | self._p.unmap()
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| 101 | self._p = None
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| 102 | del plotter
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| 103 |
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| 104 | def _region_start(self,event):
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| 105 | # Do not fire event when in zooming/panning mode
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| 106 | mode = self._p.figmgr.toolbar.mode
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| 107 | if not mode =='':
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| 108 | return
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| 109 | # Return if selected point is out of panel
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| 110 | if event.inaxes == None: return
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| 111 | # Select mask/unmask region with mask
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| 112 | height = self._p.canvas.figure.bbox.height()
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| 113 | self.rect = {'button': event.button, 'axes': event.inaxes,
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| 114 | 'fig': None, 'height': height,
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| 115 | 'x': event.x, 'y': height - event.y,
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| 116 | 'world': [event.xdata, event.ydata,
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| 117 | event.xdata, event.ydata],
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| 118 | 'pixel': [event.x, height - event.y,
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| 119 | event.x, height -event.y]}
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| 120 | self._p.register('motion_notify', self._region_draw)
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| 121 | self._p.register('button_release', self._region_end)
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| 122 |
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| 123 | def _region_draw(self,event):
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| 124 | self._p.canvas._tkcanvas.delete(self.rect['fig'])
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| 125 | sameaxes=(event.inaxes == self.rect['axes'])
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| 126 | if sameaxes:
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| 127 | xnow=event.x
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| 128 | ynow=event.y
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| 129 | self.xold=xnow
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| 130 | self.yold=ynow
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| 131 | self.xdataold=event.xdata
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| 132 | self.ydataold=event.ydata
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| 133 | else:
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| 134 | xnow=self.xold
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| 135 | ynow=self.yold
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| 136 |
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| 137 | self.rect['fig'] = self._p.canvas._tkcanvas.create_rectangle(
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| 138 | self.rect['x'], self.rect['y'],
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| 139 | xnow, self.rect['height'] - ynow)
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| 140 |
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| 141 | def _region_end(self,event):
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| 142 | height = self._p.canvas.figure.bbox.height()
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| 143 | self._p.register('motion_notify', None)
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| 144 | self._p.register('button_release', None)
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| 145 |
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| 146 | self._p.canvas._tkcanvas.delete(self.rect['fig'])
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| 147 |
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| 148 | if event.inaxes == self.rect['axes']:
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| 149 | xend=event.x
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| 150 | yend=event.y
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| 151 | xdataend=event.xdata
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| 152 | ydataend=event.ydata
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| 153 | else:
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| 154 | xend=self.xold
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| 155 | yend=self.yold
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| 156 | xdataend=self.xdataold
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| 157 | ydataend=self.ydataold
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| 158 |
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| 159 | self.rect['world'][2:4] = [xdataend, ydataend]
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| 160 | self.rect['pixel'][2:4] = [xend, height - yend]
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| 161 | self._update_mask()
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| 162 |
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| 163 | def _update_mask(self):
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| 164 | # Min and Max for new mask
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| 165 | xstart=self.rect['world'][0]
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| 166 | xend=self.rect['world'][2]
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| 167 | if xstart <= xend: newlist=[xstart,xend]
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| 168 | else: newlist=[xend,xstart]
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| 169 | # Mask or unmask
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| 170 | invmask=None
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| 171 | if self.rect['button'] == 1:
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| 172 | invmask=False
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| 173 | mflg='Mask'
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| 174 | elif self.rect['button'] == 3:
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| 175 | invmask=True
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| 176 | mflg='UNmask'
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| 177 | print mflg+': ',newlist
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| 178 | newmask=self.scan.create_mask(newlist,invert=invmask)
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| 179 | # Logic operation to update mask
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| 180 | if invmask:
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| 181 | self.mask=mask_and(self.mask,newmask)
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| 182 | else:
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| 183 | self.mask=mask_or(self.mask,newmask)
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| 184 | # Plot masked regions
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| 185 | self._plot_mask()
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| 186 |
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| 187 | # Plot masked regions
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| 188 | def _plot_mask(self):
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| 189 | msks = []
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| 190 | msks = self.scan.get_masklist(self.mask,row=0)
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| 191 | # Get projection masks for multi-IF
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| 192 | ifs=self.scan.getifnos()
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| 193 | projs = []
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| 194 | if len(ifs) > 1:
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| 195 | row0if=self.scan.getif(0)
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| 196 | for ifno in ifs:
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| 197 | if ifno == row0if: continue
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| 198 | for row in xrange(self.scan.nrow()):
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| 199 | if self.scan.getif(row) == ifno:
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| 200 | projs.append(self.scan.get_masklist(self.mask,row=row))
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| 201 | break
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| 202 | if len(self._polygons)>0:
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| 203 | # Remove old polygons
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| 204 | for polygon in self._polygons: polygon.remove()
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| 205 | self._polygons=[]
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| 206 | # Plot new polygons
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| 207 | if len(msks) > 0:
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| 208 | npanel=len(self._p.subplots)
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| 209 | j=-1
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| 210 | for iloop in range(len(msks)*npanel):
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| 211 | i = iloop % len(msks)
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| 212 | if i == 0 : j += 1
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| 213 | if len(ifs) > 1:
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| 214 | for k in xrange(len(ifs)-1):
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| 215 | self._polygons.append(self._p.subplots[j]['axes'].axvspan(projs[k][i][0],projs[k][i][1],facecolor='#aaaaaa'))
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| 216 | self._polygons.append(self._p.subplots[j]['axes'].axvspan(msks[i][0],msks[i][1],facecolor='yellow'))
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| 217 | self._p.canvas.draw()
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| 218 |
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| 219 | def get_mask(self):
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| 220 | """
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| 221 | Get the interactively selected channel mask.
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| 222 | Returns:
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| 223 | A list of channel mask.
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| 224 | """
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| 225 | return self.mask
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| 226 |
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