Update README.md

README.md

@@ -126,6 +126,16 @@ def get_columnar_separators(page, min_prominence=0.3, num_bins=10, kernel_width=
     return separators
 ```
 
+That way, columnar documents can be better separated. This is a basic heuristic but it should improve overall the readability of the documents.
+
+<div style="text-align: center;">
+    <img src="https://huggingface.co/datasets/pixparse/IDL-wds/resolve/main/doc_images/arrows_plot_straight.png" alt="Numbered bounding boxes on a document" style="width: 300px; height: 150px; display: inline-block;">
+    <img src="https://huggingface.co/datasets/pixparse/IDL-wds/resolve/main/doc_images/bounding_boxes_straight.png" alt="A simple representation of reading order" style="width: 300px; height: 150px; display: inline-block;">
+</div>
+<p style="text-align: center;"><em>Standard reading order for a single-column document.</em></p>
+
+
+
 For each pdf document, we store statistics on number of pages per shard, number of valid samples per shard. A valid sample is a sample that can be encoded then decoded, which we did for each sample.
 
 This instance of IDL is in [webdataset](https://github.com/webdataset/webdataset/commits/main) .tar format. It can be used with webdataset library or current releases of Hugging Face `datasets`.