Add project files

app.py

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+import gradio as gr
+import numpy as np
+import color_transfer_MKL as ct
+
+
+def color_transfer(source, target):
+    source = np.array(source)/255
+    target = np.array(target)/255
+    result = ct.color_transfer_MKL(source, target)
+    return np.uint8(result * 255)
+
+interface = gr.Interface(
+        fn=color_transfer, 
+        inputs=[
+            gr.Image(type="numpy"),
+            gr.Image(type="numpy"),
+        ], 
+        outputs=["image"],
+        title="Image Color Transfer",
+        description="DIGIMAP Final Project"
+    )
+
+if __name__ == "__main__":
+    interface.launch() 

color_transfer_MKL.py

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+import numpy as np
+
+EPS = 2.2204e-16
+
+
+def color_transfer_MKL(source, target):
+  assert len(source.shape) == 3, 'Images should have 3 dimensions'
+  assert source.shape[-1] == 3, 'Images should have 3 channels'
+  X0 = np.reshape(source, (-1, 3), 'F')
+  X1 = np.reshape(target, (-1, 3), 'F')
+  A = np.cov(X0, rowvar=False)
+  B = np.cov(X1, rowvar=False)
+  T = MKL(A, B)
+  mX0 = np.mean(X0, axis=0)
+  mX1 = np.mean(X1, axis=0)
+  XR = (X0 - mX0) @ T + mX1
+  IR = np.reshape(XR, source.shape, 'F')
+  IR = np.real(IR)
+  IR[IR > 1] = 1
+  IR[IR < 0] = 0
+  return IR
+
+
+def MKL(A, B):
+  Da2, Ua = np.linalg.eig(A)
+
+  Da2 = np.diag(Da2)
+  Da2[Da2 < 0] = 0
+  Da = np.sqrt(Da2 + EPS)
+  C = Da @ np.transpose(Ua) @ B @ Ua @ Da
+  Dc2, Uc = np.linalg.eig(C)
+
+  Dc2 = np.diag(Dc2)
+  Dc2[Dc2 < 0] = 0
+  Dc = np.sqrt(Dc2 + EPS)
+  Da_inv = np.diag(1 / (np.diag(Da)))
+  T = Ua @ Da_inv @ Uc @ Dc @ np.transpose(Uc) @ Da_inv @ np.transpose(Ua)
+  return T

requirements.txt

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+numpy