图片如何SEO？

这是在Bing Community 看到的关于图片SEO讨论，原文出处：http://cn.bing.com/community/forums/t/658985.aspx，我摘录了一些，基本上对图片SEO细节方面的处理都提到了，比较到位：

how do we optimize images? or is it necessary to optimize the images?

• It’s very important to optimize the images in your website because you may get a lot of traffic from search engines, if you properly optimize your images…
• If you read and understand the best tips given below, you can optimize the images in your website.
• Keywords in alt text, text around the image, image name, page title;
• Preferred image formatting – jpg;
• Separate SE accessible image folder;
• Image freshness. (SEW suggests re-uploading your images to keep them fresh);
• Enabled image search option at Google webmaster tool.
• Reasonable image file size
• Limited number of images per page;
• Popular and reliable photo sharing hosting (e.g. Flickr is reported to help in Yahoo! image optimization).