converting jpeg to ps getting wrong canvans

[nowardev]

the problem is this

if i do (my picture is very small it's not a4 picture...anyway )

convert mypicture.jpg mypictures.png

i got converted pictures well with the right resolution , the right hight and width

instead with

convert mypicture.jpg mypictures.ps

i got my pictures like it is in a4 page...



identify arabafenice.jpg

arabafenice.jpg JPEG 400x455 400x455+0+0 8-bit DirectClass 79.8KiB 0.000u 0:00.010

convert arabafenice.jpg arabafenice.ps

identify arabafenice.ps

arabafenice.ps PS 399x455 399x455+0+0 16-bit DirectClass 262KiB 0.030u 0:00.029


now it seems correct but if i print the pictures
the png is printed like jpg
instead the ps no :S

to print i used lp

[GreenKoopa]

See -page for setting your PostScript page size. Also see:
http://www.imagemagick.org/Usage/formats/#ps

[nowardev]

ok but i would like convert makes the job for me


i am doing a little service menu ... so basically

i need to convert jpeg , that can not be printed from "lp" shell program to print in linux , into a format that can be printed with lp
but
without lost quality

it was said to me ps was the correct format another format i could try without lose quality ?