In general, image functions belong in the addons. AFAIK, the only ones in the base distribution are those in JHS.
For example, there are image facilities in Plot and the Qt IDE, and these are both addons. For your own work, you could either update the appropriate addon or create a new addon. Let me know if you need help with this. On 18 January 2016 at 10:09, Devon McCormick <[email protected]> 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 > > -- > > Devon McCormick, CFA > > Quantitative Consultant > --- > NB.* images.ijs: group various image format handlers to allow image > handling > NB. without regard to underlying type. > > coclass 'images' > require 'graphics/bmp' > require 'graphics/jpeg' > require 'graphics/png' > > extractSuffix=: ]}.~[:>:'.' i:~ ] > SUFFS=: 'bmp';'jpg';'png' > > read_image=: readbmp_jbmp_`readjpeg_jjpeg_`readpng_jpng_`] @. ((SUFFS i. [: > < extractSuffix) ]) > > write_image=: writebmp_jbmp_`writejpeg_jjpeg_`writepng_jpng_`] @. ((SUFFS > i. [: < extractSuffix) ]) > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
