added exampl

examples/thd_json/test_thd.json

+{
+    "focal_spot_position_mm": [
+        2724.71682,
+        1690.5,
+        193.29345
+    ],
+    "detector_center_position_mm": [
+        1902.85619,
+        1690.5,
+        121.38996
+    ],
+    "detector_horizontal_vector": [
+        -0.08715574274765814,
+        0.0,
+        0.9961946980917458
+    ],
+    "detector_vertical_vector": [
+        -0.0,
+        -1.0000000000000002,
+        0.0
+    ],
+    "detector_center_orientation_quat": [
+        0.6755902076156602,
+        -0.0,
+        0.737277336810124,
+        0.0
+    ],
+    "pixel_pitch_mm": 0.07479989711934157,
+    "image_width_px": 1944,
+    "image_heigth_px": 1536,
+    "projection_matrix_cera": [
+        [
+            -0.17494827015512399,
+            0.0,
+            0.988513847201303,
+            285.61124242325764
+        ],
+        [
+            -0.06936693345179354,
+            -0.9999999999999998,
+            -0.006068820300589123,
+            1880.678313541253
+        ],
+        [
+            -9.032152793202284e-05,
+            0.0,
+            -7.902109766392087e-06,
+            0.24762801242350704
+        ]
+    ]
+}
\ No newline at end of file

scripts/validate.py

+from jsonschema import validate, ValidationError
+import json
+
+from pathlib import Path
+
+
+SHEMA = Path('./thd_json/projection.json')
+FILE = Path('./examples/thd_json/test_thd.json')
+
+
+def main():
+    with open(str(SHEMA)) as schema_file, open(str(FILE)) as data_file:
+        schema = json.load(schema_file)
+        data = json.load(data_file)
+
+        try:
+            validate(instance=data, schema=schema)
+            print("JSON is valid.")
+        except ValidationError as e:
+            print("Validation error:", e)
+
+if __name__ == '__main__':
+    main()
\ No newline at end of file