Update app.py

app.py

@@ -254,8 +254,22 @@ def tif_view(filepath):
     fpath, fext = os.path.splitext(filepath)
     if fext in ['tiff', 'tif']:
         img = imread(filepath[-1])
+        if img.ndim==2:
+            img = np.tile(img[:,:,np.newxis], [1,1,3])
+        elif img.ndim==3:
+            imin = np.argmin(img.shape)
+            if imin<2:
+                img = np.tranpose(img, [2, imin])
+        else:
+            Raise ValueError("TIF cannot have more than three dimensions")
+
+        Ly, Lx, nchan = img.shape
+        imgi = np.zeros((Ly, Lx, 3))
+        nn = np.minimum(3, img.shape[-1])
+        imgi[:,:,:nn] = img[:,:,:nn]
+        
         filepath = fpath+'.png'
-        imsave(filepath, img)
+        imsave(filepath, imgi)
     return filepath
     
 def update_image(filepath):