On Fri, Jul 30, 2004 at 11:52:26AM +0200, Valencic Miha wrote:
>Are you sure that D30 files contain large JPEG files in them?
I have a 300D, and I was impressed at how quickly Irfanview was as
well. I kept trying to save the jpegs from it, since it was fast and
did a good job, but they always came out 2048x1360 pixels. If you fire
up Irfanview on a CRW, and ask for image properties, it says that the
image is a "JPG/JFIF" of 2048x1360. It never occured to me that
Irfanview was reading an embedded jpeg, but it makes sense based on what
I see.
What impresses me is how fast my camera can turn raw sensor data into
jpegs in a jpeg mode, compared to how slow dcraw and fileviewer are.
It also impresses me what poor choices Canon appears to have made in
regards to its jpeg processing. Using dcraw, and playing around, it
appears that a Canon "high quality" jpeg is equivalent to running the
"cjpeg -quality 100" command. This is an amazingly bad choice that
serves only to increase the file size for no apparant gain in quality.
The "low quality" Canon jpegs seem to be like "cjpeg -qaulity 90" which
is a very good choice for what their high quality jpegs should be.
The FileViewer software provides 4 levels. I always use the lowest,
since it makes small files that are good enough for almost everything,
and most of my uses involve shrinking them down to 1/4 size or smaller.
-- void *(*(*schlake(void *))[])(void *); /* http://www.nmt.edu/~schlake/ */
*
****
*******
***********************************************************
* For list instructions, including unsubscribe, see:
* http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************
