Merge pull request #148 from miketaormina/bug-tile_scaling

Tile image scale

Author: RussTorres

renderapi/image.py

@@ -179,6 +179,7 @@ def get_tile_renderparams(
 @renderaccess
 def get_tile_image_data(stack, tileId, channel=None, normalizeForMatching=True,
                         excludeAllTransforms=False, scale=None,
+                        minIntensity=None, maxIntensity=None,
                         filter=None, host=None, port=None, owner=None,
                         project=None, img_format=None,
                         session=requests.session(), render=None, **kwargs):
@@ -205,6 +206,10 @@ def get_tile_image_data(stack, tileId, channel=None, normalizeForMatching=True,
         (or remove till there are max 3 transforms)
     scale : float
         force scale of image
+    minIntensity : int
+        Minimum pixel value to rescale image
+    maxIntensity : int
+        Maximum pixel value to rescale image
     filter : bool
         whether to apply server side filtering to image
     img_format : str
@@ -245,6 +250,10 @@ def get_tile_image_data(stack, tileId, channel=None, normalizeForMatching=True,
         qparams['excludeAllTransforms'] = jbool(excludeAllTransforms)
     if channel is not None:
         qparams.update({'channels': channel})
+    if minIntensity is not None:
+        qparams['minIntensity'] = minIntensity
+    if maxIntensity is not None:
+        qparams['maxIntensity'] = maxIntensity
     logger.debug(request_url)
 
     r = session.get(request_url, params=qparams)
@@ -286,6 +295,7 @@ def get_section_renderparams(stack, z, binaryMask=None, channel=None,
 
 @renderaccess
 def get_section_image(stack, z, scale=1.0, channel=None,
+                      minIntensity=None, maxIntensity=None,
                       filter=False,
                       maxTileSpecsToRender=None, img_format=None,
                       host=None, port=None, owner=None, project=None,
@@ -307,6 +317,10 @@ def get_section_image(stack, z, scale=1.0, channel=None,
     channel: str
         channel name to render, (e.g. 'DAPI') or a weighted average of channels of the format
         e.g 'DAPI___.8___GFP___.2'
+    minIntensity : int
+        Minimum pixel value to rescale image
+    maxIntensity : int
+        Maximum pixel value to rescale image
     filter : bool
         whether or not to apply server side filtering
     maxTileSpecsToRender : int
@@ -345,6 +359,10 @@ def get_section_image(stack, z, scale=1.0, channel=None,
         qparams.update({'maxTileSpecsToRender': maxTileSpecsToRender})
     if channel is not None:
         qparams.update({'channels': channel})
+    if minIntensity is not None:
+        qparams['minIntensity'] = minIntensity
+    if maxIntensity is not None:
+        qparams['maxIntensity'] = maxIntensity
 
     r = session.get(request_url, params=qparams)
     return np.asarray(Image.open(io.BytesIO(r.content)))