Use of XMP metadata in Khoj Image Search is broken. Disable by default

- CLIP Image score and XMP metadata score are not combining well.
  When combined they give non sensical results. Enable only once
  figure how best to combine the two.

- Show scores with higher precision for image search
  - Image search scores seem to be mostly be between 0.2 - 0.3 for some reason
  - Higher precision scores make it easier to understand the quality
    of returned results perceived by the model itself

config/khoj_sample.yml

@@ -22,7 +22,7 @@ content-type:
     input-filter:      # /path/to/images/*.jpg  REQUIRED IF input-directories IS NOT SET
     embeddings-file: "~/.khoj/content/image/image_embeddings.pt"
     batch-size: 50
-    use-xmp-metadata: true
+    use-xmp-metadata: false
 
   music:
     input-files:  # ["/path/to/music-file.org"] REQUIRED IF input-filter IS NOT SET OR

src/search_type/image_search.py

@@ -211,9 +211,9 @@ def collate_results(hits, image_names, output_directory, image_files_url, count=
         # Add the image metadata to the results
         results += [{
             "entry": f'{image_files_url}/{target_image_name}',
-            "score": f"{hit['score']:.3f}",
-            "image_score": f"{hit['image_score']:.3f}",
-            "metadata_score": f"{hit['metadata_score']:.3f}",
+            "score": f"{hit['score']:.9f}",
+            "image_score": f"{hit['image_score']:.9f}",
+            "metadata_score": f"{hit['metadata_score']:.9f}",
         }]
 
     return results

src/utils/constants.py

@@ -30,7 +30,7 @@ default_config = {
             'input-filter': None,
             'embeddings-file': '~/.khoj/content/image/image_embeddings.pt',
             'batch-size': 50,
-            'use-xmp-metadata': True
+            'use-xmp-metadata': False
         },
         'music': {
             'input-files': None,