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21
Aug, 2010
People often ask me: What image file formats will Photoshop open or save in? What are the advantages/disadvantages?
Photoshop has the capability to open and save many different graphic files. Here are some of the most popular ones.
Note: When you open an image file other than a Photoshop one, that image will default to the background layer.
.psd, .pdd, .eps
Photoshop File. This format preserves the information in all the layers. If you’re going to continue working with a picture, this is the best format to use. File size can be quite large, however. Note: It is advisable to save your work in the most up to date Photoshop format available. For example: if you have Photoshop CS and are sent a Photoshop 7 file, you should save it as a Photoshop CS file to preserve any elements that may not be supported by Photoshop 7.
.jpg, .jpeg .jpe
This format compresses the images, so that information (details and colour subtleties) are lost. You can choose how much you want to compress the image. Good format for use on the web. Small file sizes. Millions of colours.
tif, .tiff
Common in use with early scanners. Will produce high quality images, but very large files. Not for use on the web.
.gif
Pronounced both “Gif” and “Jif”, this file is one of the most popular for web graphics as it loads quickly. 8 bit format (256 colours max.). It has possibilities for transparent colour and animation.
.png
New format for use on the web that is intended to replace both gif and jpeg. Compressed, millions of colours, transparencies. It compress in a different way than jpeg, and has advanced possibilities, such as alpha channel (opaque or partly transparent colours). In 8 bit (256 colours) mode it compresses better than gif.
.bmp
Windows bitmapped image. Used by Microsoft Windows applications. Good quality, large file size. Not for use on the web.
.wmf
Windows MetaFile. Useful for clipart, and can be used to make large area, small sized background files.
.pcx
Older general purpose format. Practically obsolete now. Not for use on the web.
.psp
Internal format for Paint Shop Pro, useful if you want to swap files between these two applications.
.pcd
Kodak PhotoCD format, used with Photo Developing – although most photo processors will save your photos as jpegs if you ask them to.
Portable Document File. Adobe’s file system that allows electronic cross platform sharing of documents.
So what’s the best format for web graphics: gif or jpeg?
The general rule of thumb is to use gifs for diagrams, line drawings, illustrations, and images that contain large areas of flat colour, and jpegs for photographs and images with continuous colour tones. The jpeg format has a very good compression rate, but compression reduces the quality of the image, so it’s best to experiment with the tools in Image Ready until you have the optimal quality/file size. The gif format, on the other hand, has a smaller file size – but a limited range of colours.
Category: photoshop
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21
Aug, 2010
So you learned to take a great picture and now you would like to make some cash from them (and of course, share your artwork with the world). Here are three ways you can go about this without costing you a fortune.
–Create your own products using your photos, such as framed prints, greeting cards or t-shirts, and sell them on Ebay. Ebay receives millions of visitors eager to buy, provides easy step by step instructions on getting you set up (their website also offers advice and tips on selling) and costs are very minimal. You have the choice to auction your product or let your customer “buy now”. Your biggest investment in this is producing your products.
–Sell products on Cafepress. They provide the products (framed prints, t-shirts, coasters, mousepads, clocks, teddy bears and much more) which you will apply your photos to (just upload and add to the product you choose) and they provide complete service (orders, delivery, complaints). You build your store (through their website) either using one of their templates or you can customize your own using HTML. They have a base price for each product and you set the price above that. You are paid the price above the base price. You can open a free store or you can pay a small fee each month and receive more benefits. Thou your products will appear in their Marketplace (which they receive millions of customers) so will millions of other products. So your biggest investment here is to advertise your store. I am not going into advertising here but there are free and low cost ways of doing this (read articles regarding this matter).
–Submit your photos to online stock agencies such as Shutterstock, Fotosearch or iStockphoto. Stock agencies house large files of images and markets the photos to potential clients. You are paid a percentage or a set price of each sale. You give these clients permission to use your photo (such as in their magazine or on their personal website) but they can not resell to profit from.
Whichever way you decide to sell your photos, the better the resolution your pictures are, the better the quality. To achieve this, first you must have a high megapixel digital camera. This does not mean you need to buy the top of the line. A 5 megapixel is quite sufficient. Second, your picture should have a high DPI (dots per inch) such as 300. If you want a high quality 8×10 inch picture, you will multiply the DPI by the inch. For instance, 8×300=2400 and 10×300=3000 so you want your picture size (resolution) to be 2400×3000 pixels. You can always decrease the size of your picture but never increase the original size.
Before joining any program, be sure to read their terms carefully. I wish you much success!
Category: free photos
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