Re: Free-/Open-Source-licensed JPG, JPG-XL, PNG, TIFF, PDF, PostScript files for print filter and OCR CI testing

Thank you very much for your detailed reply.

On 2/17/25 17:40, Michael Sweet wrote:
> Till,
> 
> The CUPS and PAPPL sources already have many of these test files provided under the Apache 2.0 license.
> 
> WRT the (legacy) PWG Raster sample files, these are companions to PWG 5102.4-2012 and are provided under the same terms as the standard itself:
> 
> Copyright © 2011-2012 The Printer Working Group. All rights reserved.
> 
> This document may be copied and furnished to others, and derivative works that comment
> on, or otherwise explain it or assist in its implementation may be prepared, copied,
> published and distributed, in whole or in part, without restriction of any kind, provided that
> the above copyright notice, this paragraph and the title of the Document as referenced
> below are included on all such copies and derivative works. However, this document itself
> may not be modified in any way, such as by removing the copyright notice or references
> to the IEEE-ISTO and the Printer Working Group, a program of the IEEE-ISTO.
> 

Is this a well-known free software/document license? And if yes, which one?

> There used to be a script in the ippsample project's "scripts" directory for creating a set of test files at a specific resolution, but since the self-certification tools no longer depend on these files (ipptool can generate PWG raster test content) I stopped maintaining it.
> 
> The libcups project includes the ipptransform tool, which can generate PDF, PWG Raster, Apple Raster, and PCL content at different resolutions from PNG, JPEG, PDF, and text input, and I can certainly revive that sample file script.

Could you please do so?

>  I'm also happy to contribute sample images towards building up a repository of test files/templates that can be used for this testing.
> 

Could you also do so, too?

> For the purposes of testing:
> 
> - Media sizes: US Letter, US Legal, US Tabloid, US #10 envelope, 4x6 ("4R") photo, ISO A6, ISO A4, ISO A3, ISO DL envelope, Japanese Hagaki (postcard), JIS B5, Japanese Kakugata 7 envelope, Chinese 16k, and Chinese #3 envelope with a mix of portrait/landscape content as appropriate
> - Content: Text, photos, graphics (graphs, drawings, etc.), barcodes (1D and 2D), color and gray scale charts; multi-page content for duplex/N-up testing
> - Resolutions: 180, 203, 300, 360, 360x180, 600, 720, 1200, and 1440
> - Color spaces: sGray, sRGB, AdobeRGB, Display P3 (RGB), Device (K, RGB, CMYK) with attached ICC profile (when applicable)
> - Bit depths: 1-bit black, 8-bit for all, 16-bit for AdobeRGB, Display P3, and device color spaces
> - Labeling: Copyright and license text and URL/QRCode on each page/image
> - Fonts (PDF): Simple and composite fonts (for Unicode text), text content in the various languages we support.
> 

OK, great.

As JPEX-XL is a format which I am newly adding to the filters, how and where 
could I obtain free sample images for that format?

    Till