Initialize unified printed OCR dataset

README.md

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+---
+configs:
+- config_name: default
+  data_files: data/*.parquet
+  features:
+  - name: image
+    dtype: image
+  - name: label
+    dtype: string
+language: [fa]
+task_categories: [image-to-text]
+tags: [ocr, persian, printed-text]
+pretty_name: Persian Printed OCR 3.5M
+---
+
+# Persian Printed OCR 3.5M
+
+A unified corpus of **3,517,974 Persian printed OCR image/text pairs**, selected from five public
+datasets using GlotLID v3. Only the `accept` bucket is included; 232,317 ambiguous and 190,733
+rejected rows are excluded. The viewer exposes exactly `image` and `label`.
+
+## Sources
+
+- `AliShafiee2003/persian-ocr-garshasp-70c` — pinned revision `36bfdcdeac20c02231f4ee08472f80db2fc467bb` (CC-BY-4.0)
+- `hezarai/parsynth-ocr-200k` — pinned revision `e55cca662250585aa0278303901ef30b9b0612f9` (no license declared on its HF card)
+- `mohajesmaeili/Persian_Arabic_TextLine_Image_Ocr_Medium` — pinned revision `b99becc3cadd733998c53ab1a599eb94ac7dfb99` (no license declared on its HF card)
+- `mohajesmaeili/Persian_Arabic_TextLine_Image_Ocr_Small` — pinned revision `7ca7a34389bdf805465876eb54ebd3e93c5a48b1` (no license declared on its HF card)
+- `ordaktaktak/Persian-OCR-230k` — pinned revision `05d248b30988b41bb905f7919c0bac39cab38d70` (MIT)
+
+Users remain responsible for complying with each upstream source's terms. This aggregation does not
+replace or broaden upstream licenses.
+
+## Persian filter
+
+Accepted when GlotLID predicted `fas_Arab` with probability at least 0.65, or predicted `fas_Arab`
+and the text contained Persian-specific characters. The complete intake comprised 3,941,024 rows.