Resizing your images without quality loss

We get emails now and again from puzzled photo buyers about image resolutions at Cutcaster and what size photos they need for their specific project now that we offer different image resolutions at Cutcaster. Photo resolution has to be one of the most confusing and misunderstood aspects of digital image editing. Photo resolution only matters if you’re going to print the image in a book or magazine for example. If you are only going to use the photo online, you should focus your attention on the pixel dimension. At any resolution, you can measure the pixel widths and heights. It’s important to be very careful though how you change it. In order to best protect yourself, open the Image Size dialog in Photoshop and “uncheck” the Resample Image check-box at the bottom left. This has the effect of locking the pixel data, thus locking in quality. This is where it can be kind of confusing because the onscreen image won’t change at all and you can only see the truth by opening the Image Size dialogue box.

If you have any question about photo resolutions or pixel dimensions, please leave a comment below or email help AT cutcaster DOT com.

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One thought on “Resizing your images without quality loss

  1. FlemishDreams

    There is also a lot of confusion about DPI in digital images. DPI is just a number in the meta-info, like a command for a printer. The number can easily be changed without using Photoshop and not touching image data/quality (lossless) by the free program Irfanview (dot com).

    For resizes, don’t do it on JPG since successive openings and savings of JPGs bring about “generation loss”, as JPG is a lossy format. Try to do that on a non-lossy version like TIF, PSD or BMP.

    When resampling (in Photoshop or other aps) use “bicubic sharper” for downsize, and “bicubic smoother” for upsize. For upsizing, there are better algorithms than bicubic, like the fractal based ones.
    .-= FlemishDreams´s last blog ..Discover FlemishDreams =-.

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