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Revision as of 17:12, 14 January 2007

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This article really needs some sources that describe who used these test images. I have never seen Masuda anywhere before, and I couldn't find it on Google.... ~MDD4696 00:36, 26 January 2006 (UTC)

I agree - that would be a good extension of this article. As for the Matsuda image, I know it was named for the researcher who first used it. His name is Ichiro Matsuda and there's a list of his publications at http://itohws03.ee.noda.sut.ac.jp/~matsuda/mrp/ and an email address. I believe that the image was first used by him, then by other researchers. I don't know which of the publications use it, but we could probably find out by emailing him. The Lena image is pretty well documented at Lenna. I am not a specialist in the field, I just used the test images for a project I worked on, and tried to gather as many as possible, then decided to share the knowledge. I found all of them on the web, including the Matsuda images, and looking for them again, you are right, they are gone. I don't know why. PAR 04:49, 26 January 2006 (UTC)

I noticed that most of the images had been uploaded in 8bit (actually, all of them except Lenna and Peppers)... I had most of them in 24bit png (I presume they're good quality, though I can't remember where I got them from exatly). The only ones I didn't have are Masuda1 and Masuda2 which I do remember seeing a few years ago. The two Matsuda images on the page are currently in 8bit (256 colors). Anyone has them in 24bit? Petit 03:48, 19 February 2006 (UTC)

It seems to me that the 24 bit pictures are preferable, as long as they are the same size. I think the size needs to be the same for comparisons. If you have 24 bit versions of the same size, could you replace the 8 bit versions? PAR 04:58, 19 February 2006 (UTC)

I uploaded the images and changed the links. Most of them were the same size. A few were slightly larger (787x576). I think some people stretched them to 720x576 probably because 787 is a weird number: it's not divisible by 16... who knows... Petit 07:11, 20 February 2006 (UTC)

Image gallery

This gallery is pretty much a massive blatant violation of both copyright law and wikipedia policy. We've got these images here under a rationale of fair use, which requires that we either be using them to illustrate something that we couldn't illustrate otherwise or else that we're making some kind of critical commentary on the images themselves. Policy-wise, Misplaced Pages is not a mirror or a repository of links, images, or media files. A couple of typical test images to illustrate what's normally used, and historically important ones like lenna make sense to include, but we shouldn't have a gallery of every copyrighted image that's been appropriated by the imaging field for their own purposes. Night Gyr 07:39, 17 March 2006 (UTC)

Why don't we just provide a link to , which has a much more extensive collection of test images, and is meant to serve that purpose, instead of hosting them all ourselves? Night Gyr 07:49, 17 March 2006 (UTC)

It does seem to violate the "no repository of images" stipulation, but providing a link to an external repository is not really good either, because external links have a habit of changing or evaporating. Lets not remove these until we have examined the alternatives. Some alternatives:

• Add some content for each image, such as a list of journal articles in which it has appeared.
• Is there an image-version of Wikisource? If not there should be.

PAR 14:31, 17 March 2006 (UTC)

There is Commons, but they only want free images, not fair use ones. You still need to cover the copyright issues. Night Gyr 15:07, 17 March 2006 (UTC)

I have removed the gallery per WP:IUP#Photo_montages. If someone were to find a free image that would be suitable for inclusion. --Oden 21:05, 12 January 2007 (UTC)

You need to understand that these are standardized test images. They are not replaceable. They are to be used as presented, pixel by pixel, to test image processing algorithms. If you change one pixel in a standardized test image, it is no longer a standardized test image. This is not a gallery of pretty pictures, it is a data set that researchers can use to test image processing algorithms. PAR 23:46, 12 January 2007 (UTC)

Fair use criterion #3 says:

"The amount of copyrighted work used should be as little as possible. Low-resolution images should be used instead of high-resolution images (especially images that are so high-resolution that they could be used for piracy). Do not use multiple images or media clips if one will serve the purpose adequately."

The gallery/montage consisted of 15 high-resolution fair use images. None of the images were placed adjacent to article text. Fair use criterion #3 says:

"The material must contribute significantly to the article (e.g. identify the subject of an article, or specifically illustrate relevant points or sections within the text) and must not serve a purely decorative purpose. "

None of the images are discussed in great detail the article. I have removed them on these grounds. --Oden 01:21, 13 January 2007 (UTC)

Also, Misplaced Pages is not a mirror or a repository of links, images, or media files. Any fair use images will need to be resized to thumbnail size in order to comply with our fair use policy, which will render them useless as standardized test images.

The article on Lenna is an example of a appropriate use of a fair use image. --Oden 01:47, 13 January 2007 (UTC)

Fair use criterion #3 says:

"The amount of copyrighted work used should be as little as possible."

It does not say the amount of copyrighted work used should be zero. These do not fall into the category of simple copyrighted images. They form a special class of images that are ubiquitous in the image processing literature, and need to be treated as such.

Fair use criterion #3 says:

"The material must contribute significantly to the article (e.g. identify the subject of an article, or specifically illustrate relevant points or sections within the text) and must not serve a purely decorative purpose. "

The images contribute significantly, obviously. They are the very subject of the article.

I have restored them on these grounds, including the anti-spam tag, which is completely inappropriate. The links are links to repositories of other images, and are not "promoting" any web site.

To Oden - What modifications to this article do you think would make inclusion of the images appropriate?

PAR 16:42, 13 January 2007 (UTC)

• A fair use image has to meet all of the fair use criteria. If a free replacement could be created then a fair use image is not allowed (fair use criterion #1).
• Multiple images are not allowed if one is sufficient (criterion #3)
• Fair use images may never be included as part of a photo montage, as their status as being "fair use" depends on their proper use in the context of an article (as part of criticism or analysis) (image use policy).
• A fair use image must identify the subject of the article or illustrate certain parts of the text (criterion #8) However, if a free image could be created then identification is not permitted (criterion #1).

Unfortunately the subject of this article is generic and not specific (an article on test images in general can be compared to an article on oil paintings or on coats of arms). The possibility that a fair use image could be replaced by an image available under a free license cannot be ruled out.

I would also like to point out that articles on similar topics like Color calibration, Color management, Linux color management and CMYK color model are illustrated only using free images. The same is true for the Cornell Box, the Utah teapot and the Stanford Bunny. However, removing any images should not detract from the quality of the article text in any article. --Oden 17:54, 13 January 2007 (UTC)

I'm still trying to get at my last question - what modifications to this article do you think would make inclusion of the images appropriate? In what sense is the Lenna image a reasonable use of a test image while the others are not? If each test image had its own article, with a description of its image-processing advantages/disadvantages and a history of its use in the literature, would you then think that that would be ok? What about a standard test image article with separate sections for each image, each section giving a description of its advantages/disadvantages and history of use in the literature? How about just the way it is, with a second section that gives a list of relevant data for each image in the first section?

You still don't understand - this is not comparable to oil paintings. I cannot download the Mona Lisa, I can only download a digital reproduction of it. In an important sense, these are not digital reproductions of anything. They are a particular specific sequence of binary digits which happen to yield a picture when displayed in a particular manner. They were purposely chosen to display a picture so that quick, informal judgements could be made on the ability of an image processing algorithm to reproduce those binary digits, utilizing the special ability of the human eye/brain to make such judgements. PAR 06:15, 14 January 2007 (UTC)

Removal of gallery of copyrighted images

I have removed a gallery of copyrighted images which might have constituted a copyright infringement. Fair use criterion #2 says: "The material must not be used in a manner that would likely replace the original market role of the original copyrighted media; our use of copyrighted material should not make it so that one no longer needs to purchase the actual product.". These images are apparently sold by the copyright holder ( ). The hosting of these images on Misplaced Pages might replace the market role for the original media.--Oden 13:34, 14 January 2007 (UTC)

Suggested merge of Lenna into this article.

"It has been suggested that Lenna be merged into this article or section."

Strong Oppose - Firstly, there is little point in merging an article with a precise title and reasonable length into an article with a less accurately worded title that is a mere stub. If we did the merge, we'd have an article that talked almost entirely about the Lenna image (and at great length!) and which said nothing about any of the other test images. I'd take one look at that hypothetical article and say to myself: "If this article is only talking about the Lenna image - why does it's title refer to test images in general?".

The Lenna article is plenty long enough to stand alone - and contains far more information than would be appropriate if we were merely describing it as a test image. Lenna is almost an industry "mascot" or something akin to an Internet meme - it's gone way beyond being merely a standard test image. In fact, the very poor colour balance of the original image make it a pretty poor test image by modern standards.

If this article described many different test images in similar detail then a merge might be more appropriate - but I'm pretty sure that if we did so, this article would be so long that we'd have to consider splitting it up! So, no - this is a ridiculous suggestion.

SteveBaker 17:12, 14 January 2007 (UTC)

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