User talk:Hymyly

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This is my talk page. Feel free to leave a message, preferably in English, but can be written in other languages as well. See my main page to see which languages I know. Please note that messages left unresponded for a year are archived.

[edit] I'm using PDF to JPG. Suggestions on PDF to PNG or SVG?

I have contributed images that are generated from PDF and converted to JPG. For me, this is easy, and the JPGs are compact and easy to post. Sample images (click to enlarge):

You have added a "bad jpg" or "should be SVG" notice to some of these images. I appreciate the feedback and would enjoy improving the quality of my contributions.

Do you know of an easy way to convert PDFs to PNG and/or SVG?

The problem with JPEG is that it is designed for photographs. Among other things it throws away a lot of colour information, leaving all details to be described only by the brightness information. While this is good for photos, it introduces a lot of artefacts into non-photos, such as graphs. Additionally, JPEG is based on patented algorithms, which is always good to avoid. (See JPEG#Potential patent issues and a similar case at GIF#Unisys and LZW patent enforcement.)
Having said that, the best format to use for graphs is Scalable Vector Graphics, because it allows the graph to be scaled to whatever size fits in the article without getting aliasing problems. If the graph were saved in a raster format such as PNG, you would need a very high resolution image to achieve the same result. In most such cases, SVG yields smaller files.
The only way I know of converting PDF to SVG is through FreeSVG, but there may be others. If you have the source data the easiest way might be to generate the graphs from scratch. To edit the SVG files afterwards I strongly recommend Inkscape.
On a side note, if you have the ability to recreate the graphs from scratch, do not include the title and legend in the image itself, put these on the image desciption page instead. The graphs can then be moved to Commons and used on all Wikipedias. The title and legend are not readable when the image is scaled down anyway.
Cheers, HymylyT@C 16:14, 27 June 2007 (UTC)
I'm in the process of converting images to PNG. Thank you for your input on the subject.--Robapalooza 01:04, 15 October 2007 (UTC)


[edit] Disputed fair use rationale for Image:Deep Thought, Hitchhiker's Guide to the Galaxy.jpg

Thanks for uploading Image:Deep Thought, Hitchhiker's Guide to the Galaxy.jpg. However, there is a concern that the rationale you have provided for using this image under "fair use" may be invalid. Please read the instructions at Wikipedia:Non-free content carefully, then go to the image description page and clarify why you think the image qualifies for fair use. Using one of the templates at Wikipedia:Fair use rationale guideline is an easy way to ensure that your image is in compliance with Wikipedia policy, but remember that you must complete the template. Do not simply insert a blank template on an image page.

If it is determined that the image does not qualify under fair use, it will be deleted within a couple of days according to our criteria for speedy deletion. If you have any questions please ask them at the media copyright questions page. Thank you.BetacommandBot (talk) 21:27, 13 February 2008 (UTC)