Brightness and contrast now read in percentv7.3.0

Changelog

New features and improvements in Labelme.

  1. 2026

  2. FEATUREv7.3.0

    Brightness and contrast now read in percent

    The Brightness/Contrast dialog labels each slider as a percentage. 100% is the image as it loaded, 150% is half again as bright, so you can read an adjustment and repeat it.

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  3. FEATUREv7.3.0

    Menu names now say what the action does

    v7.3.0 renames three View actions, the two clipboard actions, and the Annotation List dock. Shortcuts and behavior are unchanged, so this is the old-to-new map.

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  4. FEATUREv7.2.0

    AI polygons keep the right amount of detail

    Adjust Polygon Detail while an AI polygon is still a live preview. Move left for a cleaner outline or right to follow finer edges.

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  5. FEATUREv7.2.0

    Shape colors now match your workflow

    Choose Automatic, Uniform, or By Label from Settings. The canvas, Annotation List, and Label List update immediately.

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  6. FIXv7.2.0

    Zoom keeps the detail under your cursor

    Ctrl/Cmd-wheel zoom now keeps the image point beneath your cursor fixed, so you can inspect a detail without losing it as the canvas changes size.

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  7. FIXv7.2.0

    Your first annotation can be undone

    Undo now activates after the first shape on a raw image. It removes a bad start from the canvas and Annotation List; auto-save updates the annotation file immediately.

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  8. FIXv7.1.0

    File List search keeps your current annotation open

    Typing in File List search no longer rescans your folder or interrupts unsaved work. Filter the list while your current image and annotation stay on the canvas.

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  9. FIXv7.1.0

    A failed file load keeps your current work open

    When the next image or annotation cannot load, your current image, shapes, canvas, and File List selection stay active instead of disappearing.

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  10. FEATUREv7.1.0

    Settings you change now stick

    Six toggles used to switch themselves off every time you reopened Labelme. They now stay where you put them, and the Settings dialog covers 19 preferences instead of 8.

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  11. FIXv7.1.0

    AI predictions over existing Shapes now land on the canvas

    An AI prediction that overlapped a Shape you already had used to disappear. Predictions now become new Shapes, an optional setting highlights the matched Shape instead, and point prompts steer which candidate you get.

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  12. FIXv7.1.0

    Your last saved annotation stays safe

    If Labelme cannot finish saving, your last successful annotation stays intact so you can fix the problem and try again.

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  13. FIXv7.1.0

    Cross-drive saves and one File List row per image on Windows

    Saving to a second Windows drive no longer closes Labelme, and the File List stops listing an image twice or leaving a dialog-opened image unchecked.

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  14. FIXv7.0.4

    AI Assist no longer crashes on overlapping shapes

    Labelme v7.0.4 fixes an AI Assist / AI Box crash that hit on older Pillow versions when a new detection overlapped an existing polygon or oriented-rectangle shape.

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  15. FIXv7.0.3

    Deleting from the annotation list no longer crashes your next shape

    Labelme v7.0.3 fixes a crash where deleting an annotation from the list's right-click menu brought the app down on your next shape. It also stops AI polygon output from choking on very thin detections.

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  16. FEATUREv7.0

    Dark mode, and a theme that follows your system

    Labelme v7 adds a color theme setting with System, Light, and Dark. Dark mode is new, System tracks your OS appearance, and the switch applies live without a restart.

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  17. FEATUREv7.0

    Annotate past the edge of the image

    A BETA preview in Labelme v7. Place polygon and shape points beyond the image boundary, so objects that run off the frame keep their true geometry instead of being clamped to the edge.

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  18. FEATUREv7.0

    See labels on the canvas, not just in the side panel

    A BETA preview in Labelme v7. Draw each shape's label text directly on the canvas so you can read what's what without cross-referencing the polygon list.

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  19. FEATUREv7.0

    A real Settings dialog, not a text file

    Labelme v7 replaces the open-the-YAML-in-an-editor preference flow with a Settings dialog that applies changes live, preserves your comments, and lets you pick the language in-app.

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  20. FEATUREToolkit v0.3.0

    YOLO-OBB export and import in the Toolkit

    The toolkit now converts oriented bounding boxes both ways. Export a Labelme dataset to YOLO-OBB for YOLOv8-OBB training, and import a YOLO-OBB dataset back into editable Labelme shapes.

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  21. FIXv6.3.1

    Switching draw modes mid-shape, without the crash

    A three-click sequence used to crash Labelme whenever you changed draw modes mid-shape. v6.3.1 fixes it, and stops empty shapes (zero-area rectangles, zero-length lines, single-point polygons) from getting saved into your annotation files.

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  22. FEATUREv6.3

    AI-assisted annotation for crowd objects, without the duplicates

    Two suppression passes in Labelme v6.3 stop AI-Box, AI-Points, and AI-Text from stacking redundant predictions on the same object, whether they came from nested SAM granularities or from regions you've already labeled.

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  23. FEATUREv6.2

    AI annotation outputs circles and rectangles, not just polygons

    Pick the output shape for AI-Points and AI-Box: polygon, mask, rectangle, oriented rectangle, or circle. Fitted to the SAM mask, no post-export conversion.

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  24. FEATUREv6.2

    Multi-select labels in Labelme

    Select many annotations at once and apply the same edit to all of them. Ctrl/Cmd+A grabs every shape on the image, range-select works in the label list, and hide/show propagates across the whole selection as one undoable step.

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  25. FEATUREv6.2

    Oriented rectangle, a rotated bounding box for off-angle objects

    A new shape type in Labelme v6.2. Three clicks to draw, corner drag to resize, edge midpoint to rotate, with an arrow on the canvas so the heading is never ambiguous.

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  26. FEATUREv6.1

    AI model downloads show progress, and you can cancel

    The first AI click of a fresh install used to freeze the app for minutes while the model downloaded in silence. v6.1 shows a progress bar with bytes, ETA, and a cancel button.

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  27. FEATUREv6.1

    A unified AI toolbar, two tools instead of four

    Labelme v6.1 collapses four near-identical AI buttons into AI-Points and AI-Box, each with a polygon-or-mask output toggle. A separator between manual and AI tools makes the right button easier to find when you haven't opened the app in a week.

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  28. FEATUREv6.1

    SAM3 AI-Box mode, one prompt for a whole crowd

    Drag a single bounding box around a cluster and SAM3 returns one shape per instance inside it. Built for parking lots, shelves, microscopy, and anything else where every visible object is the same kind of thing.

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  29. FEATUREv6.0

    Annotation JSON files store image paths, not pixels

    Labelme v6 stops base64-embedding the image inside every annotation JSON by default. Files get an order of magnitude smaller, diffs become readable, and version control stops choking on the binary blob.

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  30. FEATUREv6.0

    Auto-save is on by default

    Labelme v6 saves annotations as you work. The most common way to lose hours of labeling — forgetting to Ctrl+S before closing — is gone for new installs.

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  31. FEATUREv6.0

    Large image and TIFF support for satellite and aerial imagery

    Labelme v6 opens multi-gigapixel images and float32 GeoTIFFs that v5 refused to load. Pan, zoom, and annotate a 26,000 x 22,000 px aerial tile without the app locking up.

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