image compression software for mac reviews

If you try to recreate a large file from a small JPEG file, the results will be virtually unusable. The worst feature is that JPEG compression is a one-way street. * You have a great deal of control over how much your image is compressed and, hence, how much picture information is sacrificed. * It stores images with 24-bit-per-pixel colour, which maintains comparatively high colour fidelity So if you decide to compress an image file to reduce its size, make sure you do so with a copy of the image not the original.

When you save an image as a JPEG file, a certain amount of picture information is irretrievably discarded. Most compact-style digital cameras have JPEG as their default capture format some allow you to select between JPEG and other file formats. Invented by the Joint Photographic Experts Group, it can be found in everything from the simplest point-and-shoot model to the most sophisticated SLR. In this feature we’ll look at the most commonly-used file formats and explain when and how they are best used.įor image capture, the JPEG standard (denoted by the *.jpg extension) is the most widely used file format. This isn’t a problem as all software applications provide a selection of options whenever you save an image (although you may need to us the ‘save as’ or ‘save a copy’ menu to access them. You should also be aware that a digital camera may store your pictures in a different file format from the default format used for saving images after you’ve edited them with your preferred software package. To get the best results from your digital photography, you should know the differences between the various file formats and when each is best used.

And while all cameras allow you to save images in a compressed file format (which reduces the file size), top quality digital cameras also offer an uncompressed file format that delivers the best possible quality. Most digital cameras provide between one and three file format options plus a range of ‘quality’ settings. When you save a digital image, you normally have to choose what format you want to save it in, regardless of whether you’re saving the shot in the camera’s memory card or to a computer. An outline of the most important file formats for digital photographers and how best to use them.

Image compression software for mac reviews