adjust dataset preprocessing to correct file name

ssl4eo_eu_forest.py

@@ -0,0 +1,43 @@
+
+import datasets
+import logging
+
+# Configure logging
+logger = logging.getLogger(__name__)
+logging.basicConfig(level=logging.INFO)
+
+class ForestSegmentationDataset(datasets.GeneratorBasedBuilder):
+    def _info(self):
+        logger.info("Defining dataset schema...")
+        return datasets.DatasetInfo(
+            features=datasets.Features({
+                "sample_id": datasets.Value("string"),
+                "image_paths": datasets.Sequence(datasets.Value("string")),
+                "mask": datasets.Value("string"),
+            }),
+        )
+
+    def _split_generators(self, dl_manager):
+        logger.info("Loading sample stream from index.parquet...")
+        sample_stream = dl_manager.iter_parquet("index.parquet")
+        logger.info("Sample stream loaded successfully.")
+        return [
+            datasets.SplitGenerator(
+                name=datasets.Split.TRAIN,
+                gen_kwargs={"samples": sample_stream}
+            )
+        ]
+
+    def _generate_examples(self, samples):
+        logger.info("Starting to generate examples...")
+        for i, sample in enumerate(samples):
+            if i % 1000 == 0:
+                logger.info(f"Processed {i} samples...")
+            try:
+                yield sample["sample_id"], {
+                    "sample_id": sample["sample_id"],
+                    "image_paths": sample["image_paths"],
+                    "mask": sample["mask_path"],
+                }
+            except Exception as e:
+                logger.error(f"Error processing sample {sample.get('sample_id', 'unknown')}: {e}")