Not signed in (Sign In)


Welcome, Guest

Want to take part in these discussions? If you have an account, sign in now.

If you don't have an account, apply for one now.

Vanilla 1.0.3 is a product of Lussumo. More Information: Documentation, Community Support.


    JPG's are often used for web sites and email as they are generally smaller file sizes as they are lossy meaning that some image quality is lost when the JPG is compressed and saved. The resultant 'lossy' file means that quality can never be recovered. The JPG format is often used in digital camera memory cards. The JPG file is a great format as it often manages to compress files to 1/10 of the size of the original file which is especially good for saving on bandwidth.

    • CommentAuthortippystrut
    • CommentTimeFeb 14th 2020

    JPG is a graphical file format for editing still images, it offers a symmetrical compression technique which is processor intensive and time consiming in both compression and decompression. JPEG is a joint standard of the International Telecommunications Union (ITU-T T.81) and the International Organization for Standardization (ISO 10918-1). JPEG involves a lossy compression mechanism using discrete cosine transform (DCT). Compression rates of 100:1 can be achieved, although the loss is noticeable at that level. Compression rates of 10:1 or 20:1 yield little degradation in image quality.


    A good raw file converter will allow you to correct errors in exposure, adjust brightness levels to ensure both highlights and shadows contain detail, remove colour casts and, generally, make your digital photograph look as much like the original scene you photographed without losing any of the fine tonal nuances that make the difference between an excellent digital picture and a poor one. And, because all adjustments are done on your own computer, you have much more processing power at your fingertips than the camera can possibly provide.

    • CommentAuthorpirateeyes
    • CommentTimeFeb 14th 2020

    Unfortunately for photographers, the capabilities of conversion software vary widely between different manufacturers. Some have intuitive user interfaces; others are clunky. Different manufacturers provide different adjustments and different levels of adjustment. Nikon, for example, bundles a very basic converter (ViewNX2) with new cameras but charges more than $200 extra for its more powerful and capable converter: Capture NX 2.


    Raw converters are constantly changing, usually for the better. Many recent converters include noise reduction algorithms and corrections for chromatic aberration, rectilinear distortion and vignetting. Unfortunately, to take advantage of these features you have to keep pace with developments. You’ll probably need to update converters each time you buy a new camera body ““ and this can prove costly.

    • CommentAuthortippystrut
    • CommentTimeFeb 14th 2020

    Third-party converters are popular with both professional photographers and serious enthusiasts, with Adobe Camera Raw (ACR) and Phase One’s Capture One being the leading products. ACR is a free download for users of Photoshop and Photoshop Elements but you must have the latest version of each application installed. This requires regular updating of your software, something you may be reluctant to do if the existing application does everything you need.


    JPG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality. Image files that employ JPEG compression are commonly called "JPG files", and are stored in variants of the JIF image format. Most image capture devices (such as digital cameras) that output JPG is actually creating files in the Exif format, the format that the camera industry has standardized on for metadata interchange. Click here to find out more