9,574 Images – Handwriting OCR Data On Board of 8 Languages

Handwriting

OCR

Black board

White board

Green board

9,574 Images – Handwriting OCR Data On Board of 8 Languages. The language distribution includes English, Spanish and Portuguese, etc. The data diversity includes multiple collecting scenes, multiple text carriers, multiple languages, multiple photographic angles. The collecting angeles are looking up angle, eye-level angle and looking down angle. In terms of annotation, row-level quadrilateral (polygon) annotation and content transcription are performed on the text. The dataset can be used for tasks such as handwriting OCR.

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Specifications

Data size

9,574 images, 243,240 bounding boxes

Language distribution

English, Spanish, Portuguese, French, German, Japanese, Italian and Dutch

Collecting environment

black boards, white boards, green boards

Device

cellphone

Photographic angle

eye-level angle, looking down angle, looking up angle

Data format

the image data format is .jpg and other common image formats, the annotation file data format is.json

Annotation content

line-level quadrilateral (polygon) bounding box annotation and transcription for the texts

Accuracy rate

the error bound of each vertex of quadrilateral bounding box is within 5 pixels, which is a qualified annotation, the accuracy of bounding boxes is not less than 95%; the texts transcription accuracy is not less than 95%

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