add script to detect with api

detect_api.py

@@ -0,0 +1,16 @@
+import requests
+import base64
+import sys
+
+def detect_api(filename):
+    b64 = base64.b64encode(open(sys.argv[1], 'rb').read()).decode('utf8')
+    data = dict(image = b64)
+    response = requests.post('https://bzh.imatag.com/bzh/api/v1.0/detect',
+                             json=data)
+    if response.json()['p-value'] < 1e-3:
+        print("watermark detected")
+    else:
+        print("no watermark detected")
+
+if __name__ == '__main__':
+    detect_api(sys.argv[1])