Merge branch 'master' into 'master'

Final deposit

See merge request !36

src/methods/laurensi/reconstruct.py

+"""The main file for the reconstruction.
+This file should NOT be modified except the body of the 'run_reconstruction' function.
+Students can call their functions (declared in others files of src/methods/your_name).
+"""
+
+
+import numpy as np
+
+from src.forward_model import CFA
+from scipy.signal import medfilt2d
+
+
+def freeman_median_demosaicking(op: CFA, y: np.ndarray) -> np.ndarray:
+    """Performs the Freeman's method with median for demosaicking.
+
+    Args:
+        op (CFA): CFA operator.
+        y (np.ndarray): Mosaicked image.
+
+    Returns:
+        np.ndarray: Demosaicked image.
+    """
+    z = op.adjoint(y)
+    res = np.empty(op.input_shape)
+
+    mask_r = np.zeros_like(z[:, :, 0], dtype = float)
+    mask_g = np.zeros_like(z[:, :, 1], dtype = float)
+    mask_b = np.zeros_like(z[:, :, 2], dtype = float)
+
+    D_rg = z[:, :, 0] - z[:, :, 1]
+    M1 = medfilt2d(D_rg, kernel_size=5)
+
+    D_gb = z[:, :, 1] - z[:, :, 2]
+    M2 = medfilt2d(D_gb, kernel_size=5)
+
+    D_rb = z[:, :, 0] - z[:, :, 2]
+    M3 = medfilt2d(D_rb, kernel_size=5)
+
+    res[:, :, 0] = z[:, :, 0] + (M1 * mask_g + z[:, :, 1]) + (M3 * mask_b + z[:, :, 2])
+    res[:, :, 1] = z[:, :, 1] + (z[:, :, 0] - M1 * mask_r) + (M2 * mask_b + z[:, :, 2])
+    res[:, :, 2] = z[:, :, 2] + (z[:, :, 1] - M2 * mask_g) + (z[:, :, 0] - M3 * mask_r)
+
+    return res
+
+
+
+def run_reconstruction(y: np.ndarray, cfa: str) -> np.ndarray:
+    """Performs demosaicking on y.
+
+    Args:
+        y (np.ndarray): Mosaicked image to be reconstructed.
+        cfa (str): Name of the CFA. Can be bayer or quad_bayer.
+
+    Returns:
+        np.ndarray: Demosaicked image.
+    """
+    input_shape = (y.shape[0], y.shape[1], 3)
+    op = CFA(cfa, input_shape)
+
+    res = freeman_median_demosaicking(op, y)
+
+    return res
+
+
+####
+####
+####
+
+####      ####                ####        #############
+####      ######              ####      ##################
+####      ########            ####      ####################
+####      ##########          ####      ####        ########
+####      ############        ####      ####            ####
+####      ####  ########      ####      ####            ####
+####      ####    ########    ####      ####            ####
+####      ####      ########  ####      ####            ####
+####      ####  ##    ######  ####      ####          ######
+####      ####  ####      ##  ####      ####    ############
+####      ####  ######        ####      ####    ##########
+####      ####  ##########    ####      ####    ########
+####      ####      ########  ####      ####
+####      ####        ############      ####
+####      ####          ##########      ####
+####      ####            ########      ####
+####      ####              ######      ####
+
+# 2023
+# Authors: Mauro Dalla Mura and Matthieu Muller