![]() Image compression can help to improve a website’s performance. Lossless compression is reversible, should you need to restore an image to its former glory for editing or printing. This is ideal for when you need to showcase images and photography for a digital portfolio or when delivering images to a client. It typically works by removing non-essential metadata from image files, leaving you with a smaller but identical high-quality image. To understand which method is right for you, it helps to weigh up the pros and cons of using a lossless image type. Lossless compression isn’t the only way to reduce the size of digital images. Lossless compression advantages and disadvantages. This makes it ideal for enthusiasts of high-quality sports photography, fine art photography, nature photography and more, as you can then handle large numbers of files, without compromising on quality.Īs a reversible compression method, lossless compression can also be used as an alternative to lossy compression, after which the original image cannot be recovered. Lossless compression is used to make it easier to store, transfer and upload high-quality digital images, as the definition remains the same while occupying less space. In any case, it’s easy to see how lossless compression can shrink the size of an image, while losing little to no graphic detail. This would be fine for storing digital images - ready to restore them back to their original size and make any further edits - but for high-definition perfectionists, you may need to tweak the compression rate to get the desired result. However, as you look closely, you may notice a slight change in texture where some pixelation has begun. Even after compressing the image by 40%, it looks as though the quality is entirely retained. We don’t lose any dynamic colour or sharpness. On the surface, the difference between the compressed and non-compressed tree frogs is almost imperceptible. Here, the original image (above) is 4.69 MB and the compressed image (below) is 2.82 MB. ![]() The point of this kind of compression is to preserve as much of the image quality as possible, meaning lossless images can be hard to spot! In some cases, you may see a slight difference - but the images are often close to identical.Ĭonsider the lossless compression examples below. The indexed data then allows you to return the images to their original form if you wish. One way the algorithm does this is by replacing non-essential information and storing them in an index file.Ĭompression algorithms reconstruct the compressed data to look exactly like the original. ![]() Essentially, it rewrites the file to make it more efficient - resulting in a smaller storage or transfer size. Lossless compression uses an algorithm to shrink the image without losing any important data. As it’s a reversible process, you can also easily switch back to the original file if you need to. No details are lost along the way, hence the name. Lossless compression is a form of data compression that reduce file sizes without sacrificing any significant information in the process - meaning it will not diminish the quality of your photos.
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