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Reducing jpeg file for uploads!

  • 25-06-2009 4:34pm
    #1
    Dilynnio
    Registered Users Posts: 736 ✭✭✭


    Sorry if there is already a thread about this put I have spent the past hour trying to find one and alas I have not!

    Just wondering how to reduce jpeg photo files so that they will upload faster to gmail/facebook etc....

    Thanks a mill


Comments

  • #2
    melekalikimaka
    Moderators, Education Moderators, Music Moderators Posts: 10,686 Mod ✭✭✭✭melekalikimaka


    i think facebook does it for you... google power toys image resizer


  • #3
    Tallon
    Closed Accounts Posts: 22,565 ✭✭✭✭Tallon


    Free programme called

    irfanview


  • #4
    seamus-2k7
    Closed Accounts Posts: 453 ✭✭seamus-2k7


    Didn't want to start a whole new thread.

    Is there a converter of some sort availible for free which changes Jpegs to RAW? I find, I have limits when to PP as my camera only shoots Jpeg.


  • #5
    sineadw
    Registered Users, Registered Users 2 Posts: 3,319 ✭✭✭sineadw


    seamus-2k7 wrote: »
    Didn't want to start a whole new thread.

    Is there a converter of some sort availible for free which changes Jpegs to RAW? I find, I have limits when to PP as my camera only shoots Jpeg.

    Could be wrong, but pretty sure this isn't possible. RAW is the shot as the sensor sees it, with no processing or compression. Think of it as something similar to a film negative.


  • #6
    AnCatDubh
    Registered Users, Registered Users 2 Posts: 6,393 ✭✭✭AnCatDubh


    sineadw wrote: »
    Could be wrong, but pretty sure this isn't possible. RAW is the shot as the sensor sees it, with no processing or compression. Think of it as something similar to a film negative.

    +1

    JPG is a processed format (lossy too if you do lots of editing saves on your image). As it is processed, the computer software running on the camera takes what comes in on the sensor and uses computing algorithms and formulae to compute a JPG based on the configuration of your camera if it allows for configuration. Then it simply discards the sensor data.

    This is exactly what image processing computer software such as photoshop or the gimp (with ufraw) does - albeit with a lot of extra controls available to the user, except you get to keep all the sensor data and process it from the original every time you want to do a new take on it.

    With JPG you are constrained to the camera manufacturers interpretation of the RAW and thereafter it becomes your original or base image which you then start to process.

    So given the above you can't revert to RAW from JPG as the data simply isn't in the JPG to do so. I'm guessing you could technically go from a JPG format to a RAW format but the resultant RAW file would offer nothing over the original JPG.

    BTW - If doing lots of save edits on JPG, it is recommended to save out to TIFF at the start, do your edits and saves, then when finished save back to JPG.


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  • #7
    melekalikimaka
    Moderators, Education Moderators, Music Moderators Posts: 10,686 Mod ✭✭✭✭melekalikimaka


    or....simpler

    its like turning a sausage into a pig

    no can do, too much lost along the way


  • #8
    Fenster
    Closed Accounts Posts: 4,763 ✭✭✭Fenster


    I have a really neat Bash script that uses Imagemagick and NCFTP to crop and upload images. Still working on a watermark.


  • #9
    dudara
    Registered Users, Registered Users 2 Posts: 33,518 ✭✭✭✭dudara


    melekalikimaka wrote: »
    power toys image resizer

    +1 for this. It's handy for a quick resize where you don't care. When you install it, it becomes available as a right click option when you select the image in Windows Explorer.


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