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T
Trendssoul
Participant
June 3, 2023
Answered

300dpi

  • June 3, 2023
  • 2 replies
  • 4181 views

I'm sure I'm asking a simple question
how do i do my photoshop work as 300 dpi image jpg
thanks 

This topic has been closed for replies.
Correct answer TheDigitalDog

There is zero difference in a document that is 1000x1000 pixels (as an example) at 72 dpi (PPI) or 300 dpi (PPI) or any such value. All are 1000x1000 pixels and the dpi/ppi is simply a metadata tag. 
This very, very old primer on resolution still seems necessary to post, this may help in understanding this tag:
http://digitaldog.net/files/Resolution.pdf

2 replies

TheDigitalDog
TheDigitalDogCorrect answer
Inspiring
June 3, 2023

There is zero difference in a document that is 1000x1000 pixels (as an example) at 72 dpi (PPI) or 300 dpi (PPI) or any such value. All are 1000x1000 pixels and the dpi/ppi is simply a metadata tag. 
This very, very old primer on resolution still seems necessary to post, this may help in understanding this tag:
http://digitaldog.net/files/Resolution.pdf

Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"
    T
    TrendssoulAuthor
    Participant
    June 4, 2023

    really interesting and thanks for this information

    Ged_Traynor
    Community Expert
    Ged_TraynorCommunity Expert
    Community Expert
    June 3, 2023

    @Trendssoul unless you're going to print your images, there's no need to change the DPI, if you do want to change it you can do that from the Image > Image Size menu

    https://www.adobe.com/uk/creativecloud/photography/discover/dots-per-inch-dpi-resolution.html

      jane-e
      Community Expert
      jane-eCommunity Expert
      Community Expert
      June 3, 2023

      I hadn't seen that link before, @Ged_Traynor , but I like that it first correctly defines DPI and only later explains the difference between PPI and DPI!

       

      What does DPI stand for?

      DPI stands for Dots per Inch, referring to the number of ink droplets a printer will produce per inch while printing an image. The more dots of ink per inch the picture has, the more detail you will see when printed.

       

      How does DPI differ from PPI?

      PPI (Pixels per Inch) refers to the number of pixels that make up every inch of a digital image. It’s used to describe image resolution on a screen, rather than in print. DPI, meanwhile, refers to number of dots in every inch and is generally used for print purposes.

       

       

      Jane

        davescm
        Community Expert
        davescmCommunity Expert
        Community Expert
        June 3, 2023

        Except that some of the information in that article is wrong /misleading.

         

        Pixels per inch ppi is used for printing. An Epson inkjet for example may print an image at 300 pixels per inch. However those pixels are themselves made up of dots and those could could be laid down on the paper at 2880 x 1440 dots per inch or 1440 x 720 dots per inch. So less dots per inch but the same number  (300) of pixels per inch.

         

        If you are making images for screen ppi is irrelevant - the screen on which it is displayed will display it at whatever density that particular screen uses. All that matters is the pixel dimensions (e.g 1920 x 1080 pixels). When you send an image to print then you use ppi (pixels per inch) so the printer (or print driver) can calculate what size to make the image on the paper.

         

        Dave

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