{"id":39221,"date":"2026-02-25T11:27:10","date_gmt":"2026-02-25T10:27:10","guid":{"rendered":"https:\/\/www.graviton.at\/letterswaplibrary\/synthetic-self-promotion-openhand-synth-a-large-scale-synthetic-handwriting-dataset\/"},"modified":"2026-02-25T11:27:10","modified_gmt":"2026-02-25T10:27:10","slug":"synthetic-self-promotion-openhand-synth-a-large-scale-synthetic-handwriting-dataset","status":"publish","type":"post","link":"https:\/\/www.graviton.at\/letterswaplibrary\/synthetic-self-promotion-openhand-synth-a-large-scale-synthetic-handwriting-dataset\/","title":{"rendered":"[Synthetic] [self-promotion] OpenHand-Synth: A Large-scale Synthetic Handwriting Dataset"},"content":{"rendered":"<p><!-- SC_OFF --><\/p>\n<div class=\"md\">\n<p>I&#8217;m releasing <strong>OpenHand-Synth<\/strong>, a large-scale synthetic handwriting dataset.<\/p>\n<h1>Stats<\/h1>\n<ul>\n<li>68,077 quality-filtered images<\/li>\n<li>15 languages (English, Dutch, French, German, Spanish, Italian, Portuguese, Danish, Swedish, Norwegian, Romanian, Indonesian, Malay, Tagalog, Finnish)<\/li>\n<li>220 distinct writer styles<\/li>\n<li>~50% of images include realistic noise augmentation (Gaussian, blur, JPEG compression, lighting)<\/li>\n<\/ul>\n<h1>Generation<\/h1>\n<p>Neural handwriting synthesis model.<\/p>\n<h1>Quality Assurance<\/h1>\n<p>All images validated with LLM-based OCR.<\/p>\n<h1>Metadata per image<\/h1>\n<p>Ground truth text, writer ID, neatness, ink color, augmentation flag, language, source category, CER, Jaro-Winkler score.<\/p>\n<h1>Splits<\/h1>\n<p>80\/10\/10 train\/val\/test, stratified by writer \u00d7 source \u00d7 language.<\/p>\n<h1>Benchmark<\/h1>\n<p>Zero-shot OCR results on the test split provided for Gemini 3 Flash, Qwen3-VL-8B, Ministral-14B, and Molmo-2-8B.<\/p>\n<h1>License<\/h1>\n<p>CC BY 4.0<\/p>\n<ul>\n<li><strong>Dataset:<\/strong> <a href=\"https:\/\/huggingface.co\/datasets\/to-be\/openhand-synth\">https:\/\/huggingface.co\/datasets\/to-be\/openhand-synth<\/a><\/li>\n<li><strong>Paper:<\/strong> <a href=\"https:\/\/zenodo.org\/records\/18759951\">https:\/\/zenodo.org\/records\/18759951<\/a><\/li>\n<\/ul><\/div>\n<p><!-- SC_ON -->   submitted by   <a href=\"https:\/\/www.reddit.com\/user\/nutty_cartoon\"> \/u\/nutty_cartoon <\/a> <br \/> <span><a href=\"https:\/\/www.reddit.com\/r\/datasets\/comments\/1re929m\/synthetic_selfpromotion_openhandsynth_a\/\">[link]<\/a><\/span>   <span><a href=\"https:\/\/www.reddit.com\/r\/datasets\/comments\/1re929m\/synthetic_selfpromotion_openhandsynth_a\/\">[comments]<\/a><\/span><\/p><div class='watch-action'><div class='watch-position align-right'><div class='action-like'><a class='lbg-style1 like-39221 jlk' href='javascript:void(0)' data-task='like' data-post_id='39221' data-nonce='65e0e39b87' rel='nofollow'><img class='wti-pixel' src='https:\/\/www.graviton.at\/letterswaplibrary\/wp-content\/plugins\/wti-like-post\/images\/pixel.gif' title='Like' \/><span class='lc-39221 lc'>0<\/span><\/a><\/div><\/div> <div class='status-39221 status align-right'><\/div><\/div><div class='wti-clear'><\/div>","protected":false},"excerpt":{"rendered":"<p>I&#8217;m releasing OpenHand-Synth, a large-scale synthetic handwriting dataset. Stats 68,077 quality-filtered images 15 languages (English, Dutch, French,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[85],"tags":[],"class_list":["post-39221","post","type-post","status-publish","format-standard","hentry","category-datatards","wpcat-85-id"],"_links":{"self":[{"href":"https:\/\/www.graviton.at\/letterswaplibrary\/wp-json\/wp\/v2\/posts\/39221","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.graviton.at\/letterswaplibrary\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.graviton.at\/letterswaplibrary\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.graviton.at\/letterswaplibrary\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.graviton.at\/letterswaplibrary\/wp-json\/wp\/v2\/comments?post=39221"}],"version-history":[{"count":0,"href":"https:\/\/www.graviton.at\/letterswaplibrary\/wp-json\/wp\/v2\/posts\/39221\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.graviton.at\/letterswaplibrary\/wp-json\/wp\/v2\/media?parent=39221"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.graviton.at\/letterswaplibrary\/wp-json\/wp\/v2\/categories?post=39221"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.graviton.at\/letterswaplibrary\/wp-json\/wp\/v2\/tags?post=39221"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}