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Luigi/engine/tasks_conversion.py

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+import os
+import luigi
+import SimpleITK as sitk
+from pathlib import Path
+
+class ImageConversion(luigi.Task):
+    artifacts_dir = luigi.Parameter(default="artifacts")
+
+    def requires(self):
+        from engine.tasks_fusion import ImageFusion
+        return ImageFusion(artifacts_dir=self.artifacts_dir)
+
+    def output(self):
+        return luigi.LocalTarget(os.path.join(self.artifacts_dir, "converted_index.txt"))
+
+    def run(self):
+        fused_index = os.path.join(self.artifacts_dir, "fused_index.txt")
+        with open(fused_index, "r") as f:
+            fused_paths = [line.strip() for line in f if line.strip()]
+
+        converted_paths = []
+        for img_path in fused_paths:
+            img = sitk.ReadImage(img_path)
+            out_path = Path(self.artifacts_dir) / f"converted_{Path(img_path).name}"
+            sitk.WriteImage(img, str(out_path))
+            converted_paths.append(str(out_path))
+
+        with self.output().open("w") as f:
+            f.write("\n".join(converted_paths))