The Canon EOS 450D Digital SLR RAW File Format

The Canon EOS 450D camera has this RAW file format because digital
cameras have this same problem and that deprivation of picture quality once
the image is saved to its memory.
There are assorted type of file formats and they are JPEG and TIFF
also this canon eos 450d camera file format RAW and we will glimpse into
these different file formats launching with JPEG and were the problems
are caused.

JPEG is a compression format when images are save to memory they endure
a loss in quality of the image and this is called compression loss
When the image is retained by JPEG file format the image is compressed
down to about 90 percent to save on camera memory for compression to
reach this some data is thrown away and this degrades the quality of
the image, this compression system is called
discrete cosine transformation and when it compresses it works on a
blocks of eight pixel at a time keep some part of the picture and some
is lost so the picture is degraded.

There is upgrade to the first JPEG file format JPEG 2000 this was
phased in to digital cameras to improve on picture quality and the
system now used is wavelet compression and this file format creates
less artifacts and better quality of image with 20 percent compression
loss also pictures compressed with JPEG file format and most medium
range cameras offer a level of compression usually normal compression
high compression or super high and that guide is high compression high
degraded image low compression low degraded image.

TIFF stands for tagged image file format this is better file format it
takes up more memory space when saved to the camera and these can be
saved uncompressed this is a universally readable format and when TIFF
is compressed by LZW (LEMPEL-ZIV-WELCH) the it is compressed by about
50 percent and when the image is uncompressed there is no degrading of
the image the quality is lost by the camera itself.

RAW file format that the Canon needs 450D has is better than JPEG and
TIFF because the file is unprocessed data and is totally faithful to
the image when it was taken only draw back with this format RAW needs
its own manufactured software to read it but whichever file format is used the cameras had to be built to take on more memory and they come
in the form of memory cards.