使用很少使用的功能的包含图像的GIF测试套件 [英] Test suite for GIF containing images using rarely used features
问题描述
GIF图形格式的规范(复数，因为有87a和89a版本)很容易在Internet上找到(对于那些不想谷歌的人:
The specifications (plural, since there are versions 87a and 89a) of the GIF graphics format are easy to find in the internet (for those who don't want to google:
- http://www.w3.org/Graphics/GIF/spec-gif87.txt
- http://www.w3.org/Graphics/GIF/spec-gif89a.txt)
正如您在规范中所看到的那样，GIF支持了一些我从未见过的功能.我只想举两个例子(为简化起见，从GIF 89a): -纯文本扩展名:在 http://www.vias.org/pngguide/chapter11_15.html有一些更详细的文档 -像素长宽比:请参阅第18节.逻辑屏幕描述符.符合GIF 89a规范
As you can see in the specification GIF has support for some features that I have never seen used; I only want to give two examples (for simplicity from GIF 89a): - Plaintext extension: on http://www.vias.org/pngguide/chapter11_15.html there is a little bit more detailed documentation - Pixel Aspect Ratio: see section 18. Logical Screen Descriptor. of GIF 89a specification
另一方面，对于PNG，似乎有很多可用的测试图像: http ://www.libpng.org/pub/png/pngmisc.html (向下滚动)；最常见的是官方PNG测试套件 http://www.schaik.com/pngsuite/也可以在 http://www.libpng.org/pub/png/pngsuite上进行镜像. html .
On the other hand, for PNG there seem to be lots of test images available: http://www.libpng.org/pub/png/pngmisc.html (scroll down); the most common one is the official PNG test suite http://www.schaik.com/pngsuite/ that is also mirrored at http://www.libpng.org/pub/png/pngsuite.html.
我正在寻找的是GIF图像测试套件，该套件还/特别是包含使用功能很少使用或经常以错误方式实现的图像.
What I am looking for is a test suite of GIF images that also/especially contains images using features that are rarely used or often implemented in a wrong way.
在互联网上可以找到的最好结果如下:
The best results that I could find in the internet are the following:
- 从 http://en.wikipedia.org/w/index链接的图像.php?title = Graphics_Interchange_Format -其中有一些不太常用的GIF功能的图片
- http://phil.ipal.org/tc217.gif (例如在GIF文件中使用24位深度)-从 http://phil.ipal.org/tc.html链接并在 http://中引用en.wikipedia.org/w/index.php?title=Graphics_Interchange_Format&oldid=411332804#cite_note-8 )
- 文件 http://www-eng-x.llnl.gov/documents/a_image.gif (在 http://www中引用-eng-x.llnl.gov/documents/tests/gif.html )声称这是测试图片；对我来说，看起来好像是从浏览器不常见的GIF支持时代开始的
- 在 http://www.fileformat.info/format/gif/sample下/index.htm 中有一个名为"GIF示例文件"的文件；在我看来，他们使用的不只是GIF的非常常见"功能
- Images linked from http://en.wikipedia.org/w/index.php?title=Graphics_Interchange_Format - among them images using some not-so common GIF features
- http://phil.ipal.org/tc217.gif (as an example how to use 24 bit depth in GIF files) - linked from http://phil.ipal.org/tc.html and referenced in http://en.wikipedia.org/w/index.php?title=Graphics_Interchange_Format&oldid=411332804#cite_note-8)
- The file http://www-eng-x.llnl.gov/documents/a_image.gif (referenced in http://www-eng-x.llnl.gov/documents/tests/gif.html) claims this to be a test image; for me it rather looks like it is from a time when GIF support was not common in browsers
- Under http://www.fileformat.info/format/gif/sample/index.htm there are files called "GIF Sample Files"; it doesn't look to me that they use more than the "very common" features of GIF
因此，我发现没有什么东西能够完全满足上述GIF图片测试套件的标准，尤其是还包含很少使用或以错误方式实现的功能.
So I could find nothing fullfilling the above stated criterion of a test suite of GIF images also/especially containing features that are rarely used or often implemented in a wrong way.
所以:您知道这样的测试套件吗?
So: do you know of such a test suite?
推荐答案
我正在搜索相同的内容，并遇到了以下页面:
I was searching for the same thing and came across this page:
http://code.google.com/p/imagetestsuite/
它包含针对PNG/GIF/JPEG/TIFF创建的测试套件，以便它们基于开放源代码解码器代码库，尝试以最少的图像获得最大的代码覆盖率.这个主意似乎不错，但我还没有时间查看实际图像.
It contains test suites for PNG/GIF/JPEG/TIFF created so that they try to achieve maximum amount of code coverage with the least amount of images based on the open source decoder code-bases. The idea seems good, but I have not yet had time to check out the actual images.
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