Image Scaling for Hand-held Devices
Wednesday, February 11th, 2009
Dave and I always stress the importance of using images in blogs, both for drawing in the visitor to read the post, and for SEO reasons. (The image above was one I used for our Invest in Energy Blog client today). An interesting point came up in conversation the other day about the increasing use of hand-held devices such as PDAs and cell phones for accessing websites and blogs on the move. It was stressed that images in blog posts can be annoying when trying to read them on such devices because the image files can be quite large and take a long time to download. And on a small screen you cannot see them that well anyway.
This is an interesting point and certainly something that blog owners increasingly need to consider. While I would reiterate the importance of using images in blog posts, the blogger can make life easier for readers on all platforms by scaling and optimizing their images for quick download. This is especially important if you are taking your own digital pictures for your blog (recommended). These often come out at approximately 2000 pixels in size, with a file size somewhere around 2.5 Mb – that’s huge for the web.
Ideally, you need to scale the picture down to around 500 pixels wide and optimize the file size to around 100 – 150 Kb or so. This is especially important for bloggers using developer-hosted blogs because free space on those is limited to around 3Mb – after that you pay a monthly fee. Optimizing images is always good practice for anything on the web, even if just as a courtesy to your readers. If the software that comes with your digital camera isn’t completely up to the job – mine certainly isn’t – then something like Photoline has all the functionality you will ever need for only 59 Euros.





