72dpi to 300 dpi

hi

how do i do this

am trying to resize a jpeg to send but the person needs it 300 dpi and its currently 72. i have dpp installed on my laptop, no other means to process.... any help gratefully received

cheers

michael x

do you have the raw or original file?

If you go from 72 dpi to 300 dpi you will end up with a really crappy print. Best to send original file at 300 dpi

hi

shot in jpeg

i just have no idea how to make it 300 dpi total newbie xx

If it is the full size jpg just resize by changing the pixel size, 2400x3000 at 300dpi would be an 8x10 while 2400x3600 at 300 dpi would be an 8x12.

crop to 4x6 (or any fixed size), then take a look of the PPI in image size, you will see the wonder.

freeekunique wrote in post #3180100
hi

how do i do this

am trying to resize a jpeg to send but the person needs it 300 dpi and its currently 72. i have dpp installed on my laptop, no other means to process.... any help gratefully received

cheers

michael x

What's the size of the original in pixels? And how big a print does your friend want to make? The actual dpi is irrelevant at this point because that can be changed on the fly without necessarily changing the actual physical attribute (pixel resolution) of the image file.

goforphoto wrote in post #3180118
If you go from 72 dpi to 300 dpi you will end up with a really crappy print. Best to send original file at 300 dpi

How do you figure that? Changing your dpi does not mean that your image size has to change. AAMOF, if you look at the image resolution of your files coming out of the camera in JPEG format, you may notice that it is at 72 dpi. Does that mean that you won't be able to get good prints with the files coming out of the camera, then?

Look at the inch size of jpg images right out of the camera. they are 30 something by 40 something inches. when you print the image to an 8x10 inch size the quality of the image automatically increases. Most print companies require 300 dpi cropped to size not a huge jpg that they are going to have to resize.

In PS open your image ,, then go image> image size> then select under document size inches and type in your reqired print size and dpi , make sure constrain proportions is checked so you dont distort the aspect ,,, then if your upsizing select Bicubic smoother , if downsizing select bicubic sharper and select OK .

Rod

About the only time that you would need to be concerned about the PPI is when you are putting the image in a PDF document that will be viewed on a computer and you want the size to be scalable without having the images getting "blocky" when the image is magnified.

When making a hard copy print using something like Canon Easy-Photo Print, the software automatically scales the image down to fit the size paper being used. Converting from 72 to 300 PPI in that case would be just a waste of time and would also degrade the overall picture quality a small amount.

However, if your friend really really wants you to do it anyway, then in Photoshop, go to Image > Image Size. Make sure that the Constrain Proportions and Resample Image boxes are checked. Note the current pixel dimensions (either height or width). Change the Resolution from 72 to 300 pixels/inch and then reset the pixel dimensions back to what it was prior to changing the PPI. Your friend will be happy and maybe even buy you a six pack and then you will be happy.

RodBarker wrote in post #3181483
In PS open your image ,, then go image> image size> then select under document size inches and type in your reqired print size and dpi , make sure constrain proportions is checked so you dont distort the aspect ,,, then if your upsizing select Bicubic smoother , if downsizing select bicubic sharper and select OK .

Rod

Yikes, somehow I missed seeing your post. Sorry about repeating the same thing. The only thing that my post adds is the info about the potential for free beer.

Both you guys need to read the OP again. He has only DPP.

Freekunique - As has been said above changing the nominal dpi listed in the file is really unnecessary, but if you still want to do it in DPP do the following:
1. In the main (thumbnail) window select your image.
2. Click on the Batch button.
3. From the format menu select Jpg.
4. In the Output Resolution box write 300.
5. Do not select Resize.
6. Batch will not overwrite so you either have to save to a different folder (top of the page) and select "Current file name" or select "New file name".
7. Hit Execute.

i dont find going from 72DPI to 300 degrades the photos print at all? am i missing something here? I always save @300dpi mostly because my Epson printer loves 300dpi or higher for some reson and i was told the ONLY reason to use 300DPI would be for printing.
have I been lied too on this site?? Hmmmmm??
lol

zacker wrote in post #3182332
i dont find going from 72DPI to 300 degrades the photos print at all? am i missing something here? I always save @300dpi mostly because my Epson printer loves 300dpi or higher for some reson and i was told the ONLY reason to use 300DPI would be for printing.
have I been lied too on this site?? Hmmmmm??
lol

Changing the nominal dpi listed in the Exif will not degrade the image and it will not enhance the image. It will not do a freaking thing to the image. It's only a number they (Canon) put in the Exif because the standard says they have to write something there. It has the same effect as changing the date. What matters is the functional ppi which is determined by two things only, image pixel dimensions and print dimensions.

BTW, the optimal functional ppi for Epsons is 360. Canon and HP printers go best at 300.