Christophe Courtois a �crit, samedi 20 septembre 2003, � 10:31 : [...] > PS : Dans le m�me esprit, quelqu'un a un outil � conseiller pour > retailler en masse des images (jpegs) pour un �cran bien plus petit ? > (But principal : r�duire la taille de ces Jpegs, et leur temps > d'affichage sur le Palm)
$ jhead -h Program for extracting Digicam setting information from Exif Jpeg headers used by most Digital Cameras. v2.0 Matthias Wandel, Dec 11 2002. http://www.sentex.net/~mwandel/jhead Usage: jhead [options] files [...] -st <name> Save Exif thumbnail, if there is one, in file <name> If output file name contains the substring "&i" then the image file name is subsitute for the &i. Note that quotes around the argument are required for the '&' to be passed to the program. An output name of '-' causes thumbnail to be written to stdout [...] -cmd command --> Apply 'command' to every file, then re-insert exif and command sections into the image. &i will be substituted for the input file name, and &o (if &o is used). Use quotes around the command string This is most useful in conjunction with the free ImageMagic tool. For example, with My Cannon S100, which suboptimally compresses jpegs I can specify jhead -cmd "mogrify -quality 80 &i" *.jpg to re-compress a lot of images using ImageMagic to half the size, and no visible loss of quality while keeping the exif header Another invocation I like to use is jpegtran (hard to find for windows). I type: jhead -cmd "jpegtran -progressive &i &o" *.jpg to convert jpegs to progressive jpegs (Unix jpegtran syntax differs slightly) Sur une s�rie de photos num�riques, la premi�re option cit�e est /tr�s/ rapide, et me donne des vignettes 100x75. -- Jacques L'helgoualc'h
