OCR i18n — CJK Line Image
A single-line cjk script image for OCR engines. Pair with the UTF-8 ground-truth text twin.
Specifications
- Role
- OCR line image
- Script
- cjk
- Width
- 900
- Height
- 160
What is a .jpg file?
JPG is the common extension for JPEG, a lossy raster format that uses discrete cosine transform compression tuned for photographic images. It is 8-bit truecolor with no alpha channel, and quality is traded against file size via a compression factor. It is ubiquitous for photos on the web and from cameras.
How to use this file
Use an example JPG to test decoders, EXIF/metadata parsers, re-encoding quality, and orientation handling, or to confirm converters and image pipelines process baseline and progressive scans correctly.
How to use this file for testing
“OCR i18n — CJK Line Image” is a deterministic Novus Examples fixture for OCR testing, Internationalization. Image-only 'scanned' documents paired with their text source, for measuring OCR accuracy against a known ground truth.
Documented properties for this file: 900×160 · OCR line image. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
Document fixtures list their internal structure (pages, fields, tracked changes, embedded objects) in the spec table. Test extractors, converters, and OCR against that known structure, and compare searchable↔scanned or format-twin companions when present.
Run OCR on the scanned or image twin and score the output against the searchable or text ground truth on this page; the documented rotation, grain, and text content are the reference.
Code examples
<img src="cjk-line.jpg" alt="Example image" width="640" loading="lazy">Related files
- txtOCR i18n — ARABIC Ground Truth (TXT)UTF-8 ground-truth transcript for the arabic OCR line image — exact expected OCR output.
- jpgOCR i18n — ARABIC Line ImageA single-line arabic script image for OCR engines. Pair with the UTF-8 ground-truth text twin.
- txtOCR i18n — LATIN Ground Truth (TXT)UTF-8 ground-truth transcript for the latin OCR line image — exact expected OCR output.
- jpgOCR i18n — LATIN Line ImageA single-line latin script image for OCR engines. Pair with the UTF-8 ground-truth text twin.
- pdfAirline Boarding Pass (PDF)An airline boarding pass laid out as a landscape PDF — passenger, flight, gate, seat, PNR, and a decorative barcode strip. A fixture for testing document-layout parsing and field extraction. Synthetic; the barcode is decorative.
- pdfImage-Only 'Scanned' PDF (OCR twin)An image-only PDF containing a rasterised 'scan' of the simple document, with no text layer. Paired with the text version so you can score OCR output against a known ground truth.
Generated by generation/docs_ocr_wave_b.py. Free for any use, no attribution required — license.