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Add image adjustment sliders, mask alpha, Load Prev Mask, and button state colours

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- Three vertical sliders (Brightness, Contrast, Gamma) to the left of the
  canvas for display-only image adjustment; all use power/linear formulae
  applied on-the-fly without touching saved data
- Alpha slider controls mask overlay transparency
- Brush size slider moved to its own row
- Each slider has a reset (↺) button restoring its default value
- Hide Mask button turns red when active; Eraser button turns orange
- Load Prev Mask button copies the saved mask from the previous clip in
  the list onto the current clip; the action is pushed onto the undo stack
  so it can be reverted with Undo
- Right survey panel narrowed (stretch factor 2 → 1)
- README Controls section updated to document all new features

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Ivan Sievering
2026-05-20 14:41:10 +02:00
parent d0f7cc64fc
commit d13ad1743a
3 changed files with 181 additions and 15 deletions
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README.md
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@@ -124,17 +124,38 @@ Copy `config/clips.example.txt` as a starting point.
The window shows the video on the left (auto-playing) and the survey panel on the right.
### Mask drawing
| Action | How |
|---|---|
| Draw water mask | Click and drag on the video |
| Erase mask | Toggle **Eraser** button, then drag |
| Erase mask | Toggle **Eraser** button (turns orange when active), then drag |
| Brush preview | A white circle follows the cursor showing the current brush size |
| Adjust brush size | **Brush size** slider below the controls; click **↺** to reset |
| Undo last stroke | **Undo** |
| Undo 10 strokes | **Undo×10** |
| Redo | **Redo** — steps forward through undone strokes |
| Clear entire mask | **Clear** |
| Adjust brush size | Slider next to the erase controls |
| Toggle mask overlay | **Hide Mask / Show Mask** — hides or reveals the green overlay without affecting the mask data |
| Toggle mask overlay | **Hide Mask / Show Mask** — button turns red when hidden; does not affect mask data |
| Mask transparency | **Alpha** slider below the controls; click **↺** to reset |
| Load mask from previous clip | **Load Prev Mask** — copies the saved mask of the previous clip in the list onto the current clip; the action is undoable with **Undo** |
### Image display adjustments
Three vertical sliders sit to the left of the video and affect display only — they do not change what is saved.
| Slider | Effect | Range |
|---|---|---|
| Brightness | Shifts all pixel values up or down | −100 to +100 |
| Contrast | Scales pixel values around the midpoint | −100 to +100 |
| Gamma | Applies a power-law correction (higher = brighter) | 0.1× to 3.0× |
Click **↺** below any slider to restore its default value.
### Navigation
| Action | How |
|---|---|
| Save and continue | **Next** — saves current clip and loads the next one. If the clip already has a saved annotation a dialog asks whether to replace it or keep the existing save. |
| Go back | **Previous** — saves current clip and returns to the previously viewed clip. Disabled on the first clip. |
| Skip without saving | **Skip** — discards any unsaved changes and loads the next clip without writing anything to disk. |