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DxO PhotoLab is a raw image editing and management software from DxO designed for professional and hobbyist photographers. It offers image library management, automatic corrections for lens defects, noise reduction and raw conversion based on deep learning, as well as comprehensive set of editing tools. It can be used as an end-to-end photo editor or in conjunction with other software such as Adobe Lightroom.

DxO PhotoLab is designed for macOS and Windows computers and is sold as a one-time purchase, available for use on up to three computers^[1]. Customers receive a lifetime license and no subscription is required.

DxO PhotoLab is a raw, TIFF, and JPEG non-destructive photo editor, often regarded as an alternative to Adobe Lightroom or Capture One. It is compatible with most raw file formats produced by digital cameras. Functionality includes digital asset management, raw processing, lens correction, white balance, tone curve, HSL manipulation, noise reduction, cropping, haze removal, healing and cloning, watermarking, and image exporting (JPEG, TIFF, etc). In addition to brushes and gradients, local adjustments are created through U Point technology, a series of local adjustment tools inherited from Nik Collection.

DxO PhotoLab has two modes: PhotoLibrary and Customize. PhotoLibrary is DxO PhotoLab’s digital asset manager. Users are not required to import images but instead browse the folders of their hard drive organizing images using ratings, tags, and metadata. In addition, users can filter images, export images, organize images into Projects, and apply Presets. Virtual copies can be created and metadata can be edited.

Editing takes place in the Customize interface. A number of panels surround a central image preview and the history panel keeps a list of all changes that a user makes. Image browsing remains accessible via a film strip that can be revealed at the bottom of the screen. Tools typical of most raw photo editing software are present through the panels on the right: Exposure, White Balance, Tone Curve, Selective Tone (Highlights, Shadows, etc), Vibrancy, Saturation, etc.

HSL (Hue, Saturation, Lightness) is controlled using DxO ColorWheel, a means of manipulating color that provides users with instant feedback using a color wheel palette and various sliders. It is complemented by a Channel Mixer panel that is designed to control colors when editing black-and-white images.

DxO PhotoLab includes a number of intelligent tools and features that make semi-automated corrections. These include:

• DxO SmartLighting: automatically balances the dynamic range of an image
• DxO ClearView Plus: automatically reduces haziness in an image such as that caused by fog or cloudy water
• Red eye correction
• Repair tool
• DxO Denoising Technologies
• DxO Optics Modules for lens corrections

DxO is known for its lens corrections and denoising technology^[2] and DxO PhotoLab contains several features that aim to improve image quality. Through DxO’s laboratory testing on photographic equipment, DxO PhotoLab is aware of how much noise is produced by a camera at any ISO, and at any grey level.^[3]

The software offers three different denoising options, all of which were added over time and make different trade-offs between processing time and image quality. High Quality (HQ) is the oldest and fastest, and also the only one that can be applied to both raw and JPEG images.

PRIME (Probabilistic Raw IMage Enhancement^[4]), available since DxO Optics Pro 8 in 2013, claims improved image quality at the expense of significantly longer processing time. It can only be applied to raw images and only be previewed in a small magnifier window.

DeepPRIME, introduced in DxO PhotoLab 4 in 2020^[5], claims to produce exceptional results by performing denoising and demosaicing simultaneously through a deep neural network. It is computationally even more complex than PRIME, but makes better use of modern hardware. DeepPRIME can thus be faster or slower than PRIME, depending on the hardware it runs on. Like PRIME, it can only be previewed in the magnifier window.