jared
1049057d7d
- Add project constitution with vision, principles, and autonomy settings - Add 15 feature specifications covering full app scope - Configure agent entry points (AGENTS.md, CLAUDE.md) - Add build prompt and speckit command for spec creation - Include comprehensive .gitignore for iOS development Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
29 lines
1.4 KiB
Markdown
29 lines
1.4 KiB
Markdown
# Masking Service
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## Description
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Wrapper around Vision framework for generating masks from user taps and contour detection.
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## Acceptance Criteria
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- [ ] `MaskingService` class with methods:
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- `func generatePersonMask(at point: CGPoint, in image: CGImage) async throws -> CGImage?`
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- `func generateForegroundMask(at point: CGPoint, in image: CGImage) async throws -> CGImage?`
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- `func detectContours(in image: CGImage) async throws -> [VNContour]`
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- [ ] Uses `VNGenerateForegroundInstanceMaskRequest` for person/object masks
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- [ ] Uses `VNDetectContoursRequest` for wire/line detection
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- [ ] Mask dilation method: `func dilate(mask: CGImage, by pixels: Int) -> CGImage`
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- [ ] Mask feathering method: `func feather(mask: CGImage, amount: Float) -> CGImage`
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- [ ] Returns `nil` when no mask detected at tap location (not an error)
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- [ ] Unit tests for mask operations
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## Technical Notes
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- `VNGenerateForegroundInstanceMaskRequest` requires iOS 17+
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- Point coordinates must be normalized (0-1) for Vision requests
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- Instance masks can identify multiple separate foreground objects
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- Use `indexesOfInstancesContainingPoint` to find which instance was tapped
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## Edge Cases
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- No person/object at tap location: return nil, caller shows fallback UI
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- Multiple overlapping instances: return the one containing the tap point
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- Vision request fails: throw descriptive error
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- Image orientation: ensure coordinates are transformed correctly
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