Update app.py

app.py

@@ -78,16 +78,16 @@ def warpImage(im, vx, vy, cast_uint8=True):
     xx, yy = np.meshgrid(x, y)
     XX, YY = np.meshgrid(X, Y)
     #XX = XX + vx
-    XX = np.concatenate([XX, vx])
+    XX = np.concatenate([XX, vx], axis = 0)
     #YY = YY + vy
-    YY = np.concatenate([YY, vy])
+    YY = np.concatenate([YY, vy], axis = 0)
     mask = (XX < 1) | (XX > width2) | (YY < 1) | (YY > height2)
     XX = np.clip(XX, 1, width2)
     YY = np.clip(XX, 1, height2)
 
     warpI2 = np.zeros((height1, width1, nChannels))
     for i in range(nChannels):
-        f = interp2d(x, y, im[:, :, i], 'linear')
+        f = interp2d(x, y, im[:, :, i], 'cubic')
         foo = f(X, Y)
         foo[mask] = 0.6
         warpI2[:, :, i] = foo