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Originally Posted by bloodhound31
There are some fantastic gold nuggets of knowledge and experience coming out here. Thanks guys, it really is good to pick up on all these little techy tricks that make the difference.
Barry, my images are all taken in Canon RAW, but when I process them I save them as a maximum quality JPEG, around 11 or 12Mb, and measuring 3888 x 2592 at 350DPI.
What is the maximum size that format could be printed?
I do want to print them at some stage and I have heard it would be better to save them as a TIFF for this purpose. Does that sound right?
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Hi Baz
I am no expert in imagary but I have a reasonable working knowledge gained by experience over many years. The Canon can be a little problem because not all graphics programs will read them. It is best to convert them into Tiff for storage of the masters. This is the form that most comercial printers like and will retain all the data.
For general use the size can be reduced by storing as jpeg which can use varying amounts of compression. The problem with the compression is you lose some data, and each time you load and save you lose some more.
For picture of that size in pixels some typical file sizes would be:-
tiff 28MB with no compression
png 15MB
bmp 29MB as 24 bit image
bmp 38MB as 32 bit image
Jpg 3.4MB with minimum compression
jpg 1.13MB with medium compression
jpg 822KB with maximum compression
You can see from this that there is a large reduction in size for jpg even at minimum compression. But you do lose some picture quality.
Hope this paints a better picture of what you need to do for best storage results.
When printing your pictures the more pixels you have in a given space the better resolution you will get. With the size of picture you have, printing at 300 dpi 12.5 ins x 8.6 ins, if you print at 600 dpi the picture will be 6.25 x 4.3 and so on. On good photo quality paper the smaller image would probably look crisper but the actual resolution would be the same as the larger picture. It is more a matter of what pleases you the most.
Barry