About photos

1. view and print

gv *.eps
okular *.eps
gqview：view and print photos expect .eps

gwenview ：view all photos in a file
2. Convert

imagemagick
ImageMagick is a software suite to create, edit, and compose bitmap images.
It can read, convert and write images in a variety of formats (over 100)
including DPX, EXR, GIF, JPEG, JPEG-2000, PDF, PhotoCD, PNG, Postscript,
SVG, and TIFF. Use ImageMagick to translate, flip, mirror, rotate, scale,
shear and transform images, adjust image colors, apply various special
effects, or draw text, lines, polygons, ellipses and Bézier curves.
All manipulations can be achieved through shell commands as well as through
an X11 graphical interface (display).

/usr/bin/compare
/usr/bin/animate
/usr/bin/convert
/usr/bin/composite
/usr/bin/conjure
/usr/bin/import
/usr/bin/identify
/usr/bin/stream
/usr/bin/display
/usr/bin/montage
/usr/bin/mogrify