How to resize image to 1.5mb Jpeg

jollyjack · 03-08-2009, 21:30

I want to enter a image to a magazine and they say to attach image to 1.5mb jpeg, How do i resize the image to file size not pixel size?

In PS4 is memory size the actual file size?

martint · 03-08-2009, 23:34

This may help:

Go to the save for web and device option in the file menu, when the dialog box pops up there is an additional drop down menu in the top right hand side, the option in there "optimise" to file size is what you will need, after clicking on this it will then offer an option to type in the size of the file, I guess it goes without saying that it would be a good idea to get close the file size needed as it will reduce the quality with the reduction in the file size on the disc.

jollyjack · 04-08-2009, 05:41 **Thread Starter**

thanks m8 will give it ago

admirable · 04-08-2009, 06:07

edit

StewartR · 04-08-2009, 06:12

Quote:

Originally Posted by admirable

1.5 Mb is 1500 x 1000 pixels so just resize to that.

No it isn't, for two reasons.

1. 1500 x 1000 is 1.5 MP, which only equals 1.5 MB if you have exactly 1 byte (ie 8 bits) per pixel. An uncompressed image usually has 3 bytes (24 bits) per pixel.

2. JPEGs are compressed. (Or at least they are usually, but don't have to be.) You can have a 900 x 600 image which is a 1.5 MB JPEG (only very slightly compressed), or you could have a 9000 x 6000 image which is a 1.5 MB (much more compressed).

admirable · 04-08-2009, 07:31

Quote:

Originally Posted by StewartR

No it isn't, for two reasons.

1. 1500 x 1000 is 1.5 MP, which only equals 1.5 MB if you have exactly 1 byte (ie 8 bits) per pixel. An uncompressed image usually has 3 bytes (24 bits) per pixel.

2. JPEGs are compressed. (Or at least they are usually, but don't have to be.) You can have a 900 x 600 image which is a 1.5 MB JPEG (only very slightly compressed), or you could have a 9000 x 6000 image which is a 1.5 MB (much more compressed).

I know I know I know, I read Mp instead of Mb and edited my post but you must have started to write after I had corrected my post.

To early for me.

03-08-2009, 21:30	#1
jollyjack Photographer of the Year 2011 Real name : Jon Location: Derbyshire Posts: 1,857 Camera: Nikon D700	How to resize image to 1.5mb Jpeg I want to enter a image to a magazine and they say to attach image to 1.5mb jpeg, How do i resize the image to file size not pixel size? In PS4 is memory size the actual file size?

03-08-2009, 23:34	#2
martint Been here a while Real name : Martin Location: Basingstoke Posts: 308 Camera: Nikon D3	This may help: Go to the save for web and device option in the file menu, when the dialog box pops up there is an additional drop down menu in the top right hand side, the option in there "optimise" to file size is what you will need, after clicking on this it will then offer an option to type in the size of the file, I guess it goes without saying that it would be a good idea to get close the file size needed as it will reduce the quality with the reduction in the file size on the disc. __________________ Regards, Martin. DJI Innovations at Build Your Own Drone

04-08-2009, 06:07	#4
admirable Loves the place Location: Brigadoon Posts: 7,514 Camera: Canon 450D	edit Last edited by admirable; 04-08-2009 at 06:09.

04-08-2009, 05:41 Thread Starter	#3
jollyjack Photographer of the Year 2011 Real name : Jon Location: Derbyshire Posts: 1,857 Camera: Nikon D700	thanks m8 will give it ago