One of the common problem areas with Auction Listing is with Images
There are two main image formats which are used on the web, these are the GIF & JPG/JPEG.
Both use compression to reduce the overall size of the image which is why they were initially
chosen rather then other formats like the BMP which is not compressed.
In the early days of the web line speeds were much slower than they are today so the use of compressed images was essential. Ironically even now with faster Internet access speeds rather then moving away from compressed images you just find that more & more images are used.
The GIF image format is best suited to non photographic images due to the limitation that an individual GIF can only contain a maximum of 256 different colours. GIF's are typically used in Logo's, Buttons and Icons. The GIF image format also supports the inclusion in a single file of multiple images which are then shown in sequence to produce a moving image, these are called Animated GIF's, the e-mail button at the bottom of this page is an Animated GIF. (Animation can also be achieved using Java Script and multiple individual images).
The JPG or JPEG image format is best suited for photographic images due to its support for 24 million different colours per image. Compression in a JPG image is achieved partly when the image is saved by a user definable level of detail in the image being discarded, because of this if a JPG image is repeatedly edited in an image editing program the image will gradually degrade in quality, the number of times this can be done before the change becomes noticeable depends upon the amount of compression applied.
Viewing, copying, moving uploading to a web server or downloading has no impact on a JPG's image quality.
The JPG image format is sometimes described as lossy because of the loss of quality each time the image is edited.
Most Digital Camera's save the pictures taken in JPG format. If your camera does not use the JPG image format the software which come with the camera will usually be capable of saving in JPG format.
When adding pictures to your auction listing you can either let eBay host the picture or host them elsewhere, there are advantages and disadvantages associated with both....
| Advantages | Disadvantages |
| Hosted by eBay (iPix) |
Simple
Range of built in features (multi-image gallery, supersize etc)
|
Charge for second and subsequent images
JPG only
No control over image positioning in listing.
Your image is resized to fit the iPix frame. The further away from a standard 4:3 (width:height) ratio your image is the worse it will look if iPix is used. (Like watching a widescreen format movie on a normal television).
|
| Hosted Elsewhere |
If you use HTML image tags your picture(s) can be positioned anywhere in the description.
No iPix size restrictions.
No forced resizing of image.
Images can be added at any time during auction to either description, if you have had no bids, or as comments
|
More complicated. Requires more web savvy
With iPix the icon which indicates your listing includes an image is automatically displayed. When hosting elsewhere you might need to add a 'dummy' image to force the icon to appear.
Some Image hosts will automatically delete your image after a few weeks and it may be necessary to reload your image if the item is being relisted.
|
|---|
Hosting Elsewhere
- You can either host your images on a 'specialist'
Image Hosting Service or you might be able to use you own Internet Service Provider.
- When naming your images it is best to stick to a single case, ie lower, and to not include any spaces in the name, if you want to break the name up use _ (underscore) or - (minus) characters instead.
Using Your ISP
The image will appear between your item description text and the Honesty Counter.
- If you want to add images to your item description or add images to comments you will need to enclose the image url in the HTML image tag like this
<img src="http://myuserid.myisp/myimagename.gif">
- If you insert all your images as HTML tags in your description text the camera icon will not be displayed unless you tick the box, as I have done in the screen print above
Using An Image Host
- The procedure for using images hosted on an Image Host is much the same as I have detailed above, they are more likely to have a form which you use to upload your pictures and there should be no need for the index.html file, but otherwise everything above is relevant.
|