Add an alpha option to ROC,DET,EPC figures

bob/measure/script/common_options.py

@@ -59,6 +59,20 @@ def scores_argument(min_arg=1, force_eval=False, **kwargs):
     return custom_scores_argument
 
 
+def alpha_option(dflt=1, **kwargs):
+    '''An alpha option for plots'''
+    def custom_eval_option(func):
+        def callback(ctx, param, value):
+            ctx.meta['alpha'] = value
+            return value
+        return click.option(
+            '-a', '--alpha', default=dflt, type=click.FLOAT,
+            show_default=True,
+            help='Adjusts transparency of plots.',
+            callback=callback, **kwargs)(func)
+    return custom_eval_option
+
+
 def no_legend_option(dflt=True, **kwargs):
     '''Get option flag to say if legend should be displayed or not'''
     return bool_option(
@@ -284,7 +298,7 @@ def n_bins_option(**kwargs):
     return custom_n_bins_option
 
 
-def table_option(**kwargs):
+def table_option(dflt="rst", **kwargs):
     '''Get table option for tabulate package
     More informnations: https://pypi.org/project/tabulate/
     '''
@@ -294,7 +308,7 @@ def table_option(**kwargs):
             return value
         return click.option(
             '--tablefmt', type=click.Choice(tabulate.tabulate_formats),
-            default='rst', show_default=True, help='Format of printed tables.',
+            default=dflt, show_default=True, help='Format of printed tables.',
             callback=callback, **kwargs)(func)
     return custom_table_option
 
@@ -664,6 +678,7 @@ def roc_command(docstring, far_name="FAR"):
         @figsize_option()
         @style_option()
         @linestyles_option()
+        @alpha_option()
         @verbosity_option()
         @click.pass_context
         @functools.wraps(func)
@@ -718,6 +733,7 @@ def det_command(docstring, far_name="FAR"):
         @figsize_option()
         @style_option()
         @linestyles_option()
+        @alpha_option()
         @verbosity_option()
         @click.pass_context
         @functools.wraps(func)
@@ -765,6 +781,7 @@ def epc_command(docstring):
         @figsize_option()
         @style_option()
         @linestyles_option()
+        @alpha_option()
         @verbosity_option()
         @click.pass_context
         @functools.wraps(func)

bob/measure/script/figure.py

@@ -430,6 +430,7 @@ class PlotBase(MeasureBase):
         self._points = ctx.meta.get('points', 2000)
         self._split = ctx.meta.get('split')
         self._axlim = ctx.meta.get('axlim')
+        self._alpha = ctx.meta.get('alpha')
         self._disp_legend = ctx.meta.get('disp_legend', True)
         self._legend_loc = ctx.meta.get('legend_loc')
         self._min_dig = None
@@ -571,7 +572,8 @@ class Roc(PlotBase):
                 CAR=self._semilogx,
                 min_far=self._min_dig,
                 color=self._colors[idx], linestyle=self._linestyles[idx],
-                label=self._label('dev', idx)
+                label=self._label('dev', idx),
+                alpha=self._alpha,
             )
             if self._split:
                 mpl.figure(2)
@@ -584,7 +586,8 @@ class Roc(PlotBase):
                 CAR=self._semilogx,
                 min_far=self._min_dig,
                 color=self._colors[idx],
-                label=self._label('eval.', idx)
+                label=self._label('eval.', idx),
+                alpha=self._alpha,
             )
             if self._far_at is not None:
                 from .. import fprfnr
@@ -604,7 +607,8 @@ class Roc(PlotBase):
                 CAR=self._semilogx,
                 min_far=self._min_dig,
                 color=self._colors[idx], linestyle=self._linestyles[idx],
-                label=self._label('dev', idx)
+                label=self._label('dev', idx),
+                alpha=self._alpha,
             )
 
 
@@ -648,7 +652,8 @@ class Det(PlotBase):
                 dev_neg, dev_pos, self._points, min_far=self._min_dig,
                 color=self._colors[idx],
                 linestyle=self._linestyles[idx],
-                label=self._label('dev.', idx)
+                label=self._label('dev.', idx),
+                alpha=self._alpha,
             )
             if self._split:
                 mpl.figure(2)
@@ -658,7 +663,8 @@ class Det(PlotBase):
                 eval_neg, eval_pos, self._points, min_far=self._min_dig,
                 color=self._colors[idx],
                 linestyle=linestyle,
-                label=self._label('eval.', idx)
+                label=self._label('eval.', idx),
+                alpha=self._alpha,
             )
             if self._far_at is not None:
                 from .. import farfrr
@@ -675,7 +681,8 @@ class Det(PlotBase):
                 dev_neg, dev_pos, self._points, min_far=self._min_dig,
                 color=self._colors[idx],
                 linestyle=self._linestyles[idx],
-                label=self._label('dev.', idx)
+                label=self._label('dev.', idx),
+                alpha=self._alpha,
             )
 
     def _set_axis(self):
@@ -713,7 +720,8 @@ class Epc(PlotBase):
             color=self._colors[idx], linestyle=self._linestyles[idx],
             label=self._label(
                 'curve', idx
-            )
+            ),
+            alpha=self._alpha,
         )