Devon,
I have done much the same thing in preparation for Fractals,
Visualization and J, 4th ed., Part 1, which I hope is soon.
My addons media/image_kit and graphics/fvj4 really could also be
posted. I control the default jpeg quality with a global (now 90) as in
the old image3.
Advice on getting these addons posted?
Best, Cliff
On 1/18/2016 1:09 PM, Devon McCormick wrote:
Hi -
As some of you may know, I use the J facilities for reading and writing
.JPGs quite a bit. However, for convenience, I've put together an "images"
script (as I believe there used to be) that incorporates the current set of
read/write verbs we have in J for .BMP,.JPG, and .PNG files (see below,
after my signature). So, I have a simple use of agenda to invoke the
correct reader or writer based on the suffix of the file name. This way,
whenever I work with a file in one of the supported formats, I can use the
same verb "read_image" that figures out which variety of I/O I need based
on the file suffix.
I'm not sure who's been maintaining this underlying code but I noticed that
whereas the jpeg code used to have a global by which the default .JPG
quality is controlled (since it's a lossy format), the current version has
a default of 75 (75% where higher is better quality, less compression)
scattered throughout. This difference requires me to either change the
default within the jpeg script, which I did, or remember to specify it
every time I write jpeg images, which I don't want to do.
So, my general question is how do I get my "images.ijs" cover verbs
included within the default J distribution? Along these lines, if I "fix"
the existing jpeg code to go back to using a global to control default
quality, what's the process for getting this change accepted into the
distribution?
Thanks,
Devon
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