[SOLVED]file size for meeting its length in centimetres

[manit]

i have to upload photograph on website which asks for picture size 3.5cmx4.5cm & file size in range 25kb-110kb
firstly how can i find out length of my imagefile ?
Currently I am using paintbrush in windows using which I resized picture to given centimetres but file size was just 10kb .
i already know that 'strip' , 'quality' option helps to reduce jpg size .

[fmw42]

You can create any size jpg you want in terms of file size within limits by using the -size (for width x height) -quality (for compression). You can then set the resolution in inches or centimeters by using the -units and -density arguments. It will not change the file size.

I would recommend that you make the width and height as large as possible (maintaining the aspect ratio specified by the cm x cm ) with the least amount of compression ( say -quality 75 or higher) to match your file size restriction. Then just set the density and units to get the resolution to match your cm requirement

see
http://www.imagemagick.org/script/comma ... .php#units
http://www.imagemagick.org/script/comma ... hp#density
http://www.imagemagick.org/script/comma ... hp#quality

[manit]

That helped.
Thank You.
sorry for my late reply.