AI masking in Capture One automatically selects a photo’s subject or background so you can adjust each separately, which can replace much of the manual brushing for local edits. For edits that change content, such as replacing a background, Adobe Firefly’s AI photo editor uses Prompt to Edit and a Markup tool instead of hand-drawn masks.
Picture a wedding photographer with 900 images from a Saturday ceremony. In the past, brightening the couple while darkening a busy reception hall meant painting a mask around veils, flyaway hair, and bouquets, image after image. That kind of manual masking could eat an entire evening. AI masking changes the math. The software detects the subject in a fraction of the time, and a photographer’s job shifts from drawing masks to checking and refining them. The question isn’t whether AI can mask. It’s how much of the work it can take over and where human judgement still matters.
Capture One’s AI masking arrived in version 16.3.0, which Capture One says introduced subject masking, background masking, AI select, and AI eraser. A review in Fujilove Magazine describes AI Select as a brush you hover over the image, clicking when the part you want lights up. Capture One also notes that AI mask preparation takes about 3 to 6 seconds the first time you use AI Select on an image. For tasks beyond adjustment masks, Firefly takes a different approach. Adobe says you can use Prompt to Edit to add, remove, or replace objects and backgrounds by typing what you want to change and use the Markup tool to point to specific areas, with free daily generations on a free account.
How Masking Works in an AI Photo Editor
Masking in an AI photo editor works by having a trained model identify what’s in the image, then turning that detection into a selection you can adjust or edit.
There are two main styles. In raw editors like Capture One and Lightroom, AI masks are adjustment masks: they limit exposure, colour, or other changes to a selected area without altering the pixels’ content. In generative editors like Firefly, the selection guides a content change. Adobe says Firefly’s Markup tool lets you select and indicate specific parts of an image you want to change, while Generative Remove cleans up unwanted elements and Replace Background swaps the scene.
That distinction matters. Capture One’s own team noted in a livestream. Q&A: that its AI masking is for smarter and quicker masking, but it can’t replace the background. For that, a generative tool fills the gap.
AI Masking for Subject and Background: What Gets Selected Automatically
AI masking for subject and background typically gives you one-click selections for the most common needs, plus brushes for everything else.
| Platform | Automatic selections | Key details |
| Adobe Firefly | Areas you mark or describe | Markup tool; Prompt to Edit; Generative Remove; Replace Background; free daily generations |
| Capture One | Subject, Background, and People | AI Select and AI Eraser brushes; batch masking across selected images; copy AI masks between images with automatic recalculation |
| Adobe Lightroom Classic | Sky, Subject, Objects, and People | People’s masks can target body parts such as skin, hair, and clothing. |
Capture One says that if an image has more than one subject, it should select them all, and its People Masking option can place each element on its own layer. For tricky areas, Capture One’s older Magic Brush, which a user on DxO’s forum notes uses both luma and chroma, remains a useful complement, such as isolating a sky behind trees.
How Much AI Photo Editing Replaces Manual Masking, and the Impact on Your Workflow
AI photo editing replaces most routine manual masking, but not all of it, and the impact on your workflow depends on how consistent your shoots are.
Where AI saves the most time: Repetitive local edits on similar images. Capture One lets you copy unchanged Subject, Background, and People masks to other images and recalculates them automatically. In Capture One Pro, AI masks also work with Next Capture Adjustments, recalculating as new images arrive during a tethered shoot.
Where you still refine by hand: Fine edges like hair against a busy background, low-contrast scenes, and images where the “subject” is ambiguous. Plan to check edges and touch up with a brush or eraser.
Where generative tools take over: Removing distractions or replacing a background, which adjustment masks can’t do. Firefly handles these through prompts and markup, and you can download the result to continue in your raw workflow.
In practice, many photographers find AI handles the first pass, while they spend their time on quality control.
FAQ
Q. Can Capture One AI masks be applied to many photos at once?
Yes. Capture One says you can select multiple images and apply Subject or Background masking to all of them, and copy unchanged AI masks between images, with each mask recalculated for the new photo.
Q. Can I replace a background using AI masking alone?
Not in Capture One, which says its AI masking is for faster masking rather than background replacement. Generative tools such as Firefly’s Replace Background or Prompt to Edit can change the background itself.
Q. Are Firefly edits safe for client work?
Adobe says its Firefly generative AI models are commercially safe because they were trained on licensed and public domain content. For partner models, you’re responsible for checking whether a model suits your project.
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