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andrewsartain
Participant
February 3, 2018
Question

Saving an image larger than original

  • February 3, 2018
  • 4 replies
  • 1771 views

i am frustrated to not know how I can save a raw file as a JPEG as a 4 megabyte file without losing quality. I need this size to upload to shutter stop.

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    4 replies

    Stephen Marsh
    Community Expert
    Stephen MarshCommunity Expert
    Community Expert
    February 4, 2018

    Don’t confuse MP with MB...

    What are the technical requirements for images? - Shutterstock Contributor Support and FAQs

    File Format

    We accept images in JPEG and TIFF formats, but we recommend submitting your images as JPEGs because all images are automatically converted to jpeg upon approval into our collection. We do not currently accept PSD files or TIFFs with layers.

    Color profile

    Shutterstock images are offered in sRGB since most images on the Internet are displayed in that profile. If you submit images in a different color profile, the colors will likely be altered during conversion to sRGB, so we recommend converting your images to sRGB before uploading them to Shutterstock.

    File Size

    All images must be at least 4 MP (megapixels), but preferably 5 MP or larger and set at highest quality settings to produce an acceptable file dimensions for submission to Shutterstock.

    Please keep in mind that megapixels (MP) are different from megabytes (MB), as they refer to the dimensions and not the file size. To determine the amount of pixels in an image, multiply the pixel width by the pixel length. For example:

    2000 x 2400 pixels = 4.8 Megapixels. A file of this size is acceptable.

    1200 x 3000 pixels = 3.6 Megapixels. This is smaller than our minimum size requirement, and this file will not be accepted by our system.

    The maximum file size you can upload using your web browser is 50 MB. If you're using FTP, you can upload files  up to 4 GB.

    A
    andrewsartainAuthor
    Participant
    February 6, 2018

    Very helpful that,thanks. Still trying to work it out using photoshop

    Stephen Marsh
    Community Expert
    Stephen MarshCommunity Expert
    Community Expert
    February 6, 2018

    Luckily, there is not too much to figure out.

    You originally mentioned “upload to shutter stop."

    If this is really “Shutterstock”, then my previous link will hopefully clear up the submission guidelines.

    Don’t worry too much about file size in megabytes (MB), they have a 50 MB browser limit or a 4 GB FTP limit… The major deciding factor is the total pixel count of the image, which should be greater than 4 MP (megapixel).

    The Shutterstock site states:

    2000 x 2400 pixels = 4.8 Megapixels. A file of this size is acceptable.

    1200 x 3000 pixels = 3.6 Megapixels. This is smaller than our minimum size requirement, and this file will not be accepted by our system.

    So 2,000 x 2,400 divided by 1,000,000 = 4.8

    Here is an Adobe Bridge script that I hacked to create an inspector panel that will list the MP (megapixel) size of a (single) selected image:

    #target bridge;  
    getMPDetails = function(){  
        var retvalue = "";  
        var thumbs = app.document.selections;  
        thumbs = app.document.getSelection("jpg,tif,psd");  
        for(var i=0; i < thumbs.length; i++) {  
            app.synchronousMode = true;  
            var Width =  thumbs.core.quickMetadata.width;  
            var Height = thumbs.core.quickMetadata.height;  
            //var cMode = thumbs.core.quickMetadata.colorMode;//3=RGB 4=CMYK  
            var mem = ((Width * Height /1000000)).toFixed(2);  
            retvalue += "Megapixel Size: = " + mem + " - " + thumbs.name + "\n";  
        }  
        return retvalue;  
    }  
    MegapixelInfo = function(){  
        var Ip2 = new InspectorPanel("Megapixel Details");  
        this.panelReferance = Ip2;  
        var abc = [["","[[javascript:getMPDetails()]]"]];  
        var tp2 = new TextPanelette("Megapixel Info", "", "[[this]]", abc);  
        Ip2.registerPanelette(tp2);  
        app.registerInspectorPanel(Ip2);  
        try{  
        app.document.displayInspectorView = true;  
        }catch(e){}  
    }  
    MegapixelInfo();

    Instructions for the save/installation here:

    Prepression: Downloading and Installing Adobe Scripts

    Another option: You should be able to come up with a Bridge find command to use with a Smart Collection that would filter out images below a certain pixel width and height, which would effectively give you a threshold for a specific MP size. Presuming that the images were not cropped and were from a consistent aspect ratio (i.e. same camera). This would be a good option to quickly assess multiple files.

    A
    andrewsartainAuthor
    Participant
    February 3, 2018

    They want j pegs. I do not know own to compress a file either. If my camera takes an 8 mb shot in raw or tiff how can I easily make it 4mb.

    D Fosse
    Community Expert
    D FosseCommunity Expert
    Community Expert
    February 3, 2018

    Specifying a target file size in MB is meaningless in itself. What pixel dimensions do they want? What file format? Do they want uncompressed TIFFs or compressed jpegs and how much compressed?

    The only thing that does make sense is pixel dimensions and whether a lossy/compressed format like jpeg is allowed. If quality is critical, it may not be and they'll want TIFF.

    Jpeg compression can squeeze a file down to, say, 2 - 10% of uncompressed file size. That's data compression, not image size or resolution. It's the same image. But lots of data are thrown away, and artifacts introduced - and this process is cumulative, destroying the original data further with every resave.

    davescm
    Community Expert
    davescmCommunity Expert
    Community Expert
    February 3, 2018

    If you save as a jpeg you lose quality - even at highest quality settings. Jpeg uses lossy compression so that is unavoidable. Whether the loss is visible depends on the image and the amount of compression you set using the quality controls.

    Try using Export As or Save for Web (Legacy) where you can preview the effect of compression as you change the quality slider to deliver the target filesize, and also remove unnecessary metadata.

    Dave

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