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Is your cover a jpeg or a gif under the required file size (200K)? If
so, visit the upload centre. If you want
to achieve the required file size then save your file as either of these
two formats. If you are unsure of which to use then read the following
to see which fits yours best. You can also save your graphic as an uncompressed
.tif format and make .jpg and .gif copies from this to draw your own conclusions.
The Jpeg format
JPEG (Joint Photographic Experts Group). A permanent compression which
means that your image will always be viewed compressed (It isn't compressed
then expanded once reopened like a .zip file would be!!). JPEG's are commonly
used for digital photography and pictures containing many colours. When
you save your image as a JPEG (normally .jpg) then you will be prompted
to choose the level of compression. Level 8 (out of 10) is good enough
for music covers and should safely keep your file sizes down. If you are
compressing an image of 150 dpi then you may need to increase the compression
level.
The Gif format
Unfortunately, due to the patent laws on the gif format we are unable
to accept it as a valid submission image type. We have decided to use
PNG format instead. We will inform you of when the patent law expires
and when we are able to use the GIF format again.
The PNG format
The Portable Network Graphic (PNG) is an excellent replacement for the
GIF. For the Web, PNG really has three main advantages over GIF: alpha
channels (variable transparency), gamma correction (cross-platform control
of image brightness), and two-dimensional interlacing (a method of progressive
display). PNG also compresses better than GIF in almost every case, but
the difference is generally only around 5% to 25%, not a large enough
factor to encourage folks to switch on that basis alone. All good graphic
packages support PNG file format so experiment with this format and JPEG
to find which is most suitable for your image.
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