docs: Update readme

README.md

@@ -1,3 +1,36 @@
 ---
-license: mit
+language:
+- en
+license:
+- mit
+source_datasets:
+- original
+tags:
+- ocr
+- text-detection
+task_categories:
+- image-detection
+- image-segmentation
+- optical-character-recognition
 ---
+
+
+# School Notebooks Dataset
+
+The images of school notebooks with handwritten notes in English.
+
+The dataset annotation contain end-to-end markup for training detection and OCR models, as well as an end-to-end model for reading text from pages.
+
+## Annotation format
+
+The annotation is in COCO format. The `annotation.json` should have the following dictionaries:
+
+- `annotation["categories"]` - a list of dicts with a categories info (categotiy names and indexes).
+- `annotation["images"]` - a list of dictionaries with a description of images, each dictionary must contain fields:
+   - `file_name` - name of the image file.
+   - `id` for image id.
+- `annotation["annotations"]` - a list of dictioraties with a murkup information. Each dictionary stores a description for one polygon from the dataset, and must contain the following fields:
+   - `image_id` - the index of the image on which the polygon is located.
+   - `category_id` - the polygon’s category index.
+   - `attributes` - dict with some additional annotation information. In the `translation` subdict you can find text translation for the line.
+   - `segmentation` - the coordinates of the polygon, a list of numbers - which are coordinate pairs x and y.