Adey Baker |
03-12-06 08:22 |
When I get a shot ready for posting in the gallery I usually do the following:
Image processing: I usually work from an image that I've already processed with the usual 'levels,' 'unsharp mask,' etc.
Re-size: make sure that 'constrain proportions' is 'ticked' as this will automatically keep proportions of the image correct when you re-size one dimension. Then I make sure that 72 pixels per inch is set as the resolution. I keep the maximum width within about 1000 pixels and the height 700 pixels as any larger means that many viewers will have to 'scroll' around the image on their monitors to view it all - this completely ruins the overall effect of the photo!
File-size/compression: I use the 'Save for Web' function (just below 'Save as' in photoshop, etc.). This opens the image in a seperate window and you can use the slider towards the right side whilst checking the file-size under the shot towards the left. The lower the figure you use, the higher the compression (basically, you're throwing out details from the image for file-reducing, but the detail will be 're-invented' when you open it up to view - with varying degrees of faithfulness to the original!). You can get away with surprisingly small file sizes purely for internet viewing. The largest file size in my gallery is about 176kbs whilst the smallest is approx. 44kbs. The larger the image size and the more fine detail (ie. leaves on trees) that it contains the larger the file size will be unless you use more compression. A shot re-sized to 800 pixels wide containing a large area of one colour, such as a clear blue sky, will look fine at about 40kbs.
Bear in mind that many people don't have broadband connections so opening up large files is a time-consuming business on dial-up - if they see that a shot has a file size around 250kbs they'll probably not bother viewing it at all!
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