What is image compression?
How to compress photos in Adobe Photoshop Lightroom.
You can use any software that converts image file types as your own personal image compressor. In Lightroom, you can compress your original photos by turning them into a JPG or a TIF file. JPGs tend to work best for sharing and storing images, because they maintain reasonable image quality at a relatively small size.
How to compress image files in Adobe Photoshop.
Compression works similarly in both Photoshop and Lightroom, but in Photoshop, you have the added option of exporting your file as a GIF. For most sharing and storage purposes, though, you’ll get better results using the JPG image file format.
The terms lossy and lossless describe how much information files maintain after compression.
Lossy files “lose” some amount of data — for example, the actual number of colors or pixels in a photo. In most instances, your image will only lose redundant or barely perceptible visual information. An average viewer isn’t likely to be able to tell the difference between an original photo and one that’s gone through lossy compression. But, if you want to print the highest-quality version of your photo, you’ll want to keep all of its pristine visual detail intact — and that’s where lossless compression can help.
If you’ve ever used a ZIP file, you’re already experienced in lossless compression. With this form of compression, you get slightly reduced file sizes without losing any precious data. Lossless compression is great when every detail of your image counts, like when you’re photo editing or printing a family portrait.
However you decide to share your images, always pay attention to how the image looks after compression. If you’re not happy with the image quality, experiment with different compression levels in Lightroom and Photoshop until you find the right balance between quality and file size. It may take a little trial and error but before you know it, you’ll be compressing images like a boss.
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