added brain tumor object detection paligemma dataset

README.md

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+---
+dataset_info:
+  features:
+  - name: image_id
+    dtype: int64
+  - name: image
+    dtype: image
+  - name: objects
+    struct:
+    - name: area
+      sequence: int64
+    - name: bbox
+      sequence:
+        sequence: int64
+    - name: id
+      sequence: int64
+    - name: iscrowd
+      sequence: int64
+    - name: label
+      sequence: float64
+  - name: paligemma_labels
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 21779064.0
+    num_examples: 614
+  - name: validation
+    num_bytes: 9092691.0
+    num_examples: 264
+  - name: test
+    num_bytes: 7562817.0
+    num_examples: 223
+  download_size: 38241726
+  dataset_size: 38434572.0
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: data/train-*
+  - split: validation
+    path: data/validation-*
+  - split: test
+    path: data/test-*
+---

data/test-00000-of-00001.parquet

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+size 7516967

data/train-00000-of-00001.parquet

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data/validation-00000-of-00001.parquet

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