Technical Specifications
Device Performance Specifications
The medical device is a cloud-based software solution designed for reliable, high-performance clinical analysis. The following specifications define the device's operational characteristics:
Performance Metrics
| Specification | Value | Description |
|---|---|---|
| Device Size | 33 kilobytes | Lightweight software footprint |
| Average Response Time | 1,400 milliseconds | Typical processing time for clinical analysis |
| Maximum Response Time | 10 seconds | Guaranteed maximum time for any transaction |
| Request Capacity | No limit | Scalable architecture supports unlimited concurrent requests |
Service Availability
| Specification | Value | Description |
|---|---|---|
| Service Availability | 24/7/365 | Continuous operation with no scheduled downtime |
| Uptime Guarantee | 100% per month | Service level commitment for medical device reliability |
| Recovery Time (RTO) | 6 hours maximum | Maximum time to restore service after failure |
| Data Loss (RPO) | None | Zero data loss guarantee with robust backup systems |
Data Backup and Storage
| Specification | Value | Description |
|---|---|---|
| Backup Infrastructure | AWS S3 | Enterprise-grade cloud storage with redundancy |
| Backup Frequency | Every 12 hours | Regular automated backups ensure data protection |
| Backup Type | Incremental | Efficient backup strategy minimizing storage overhead |
Image Processing Requirements
| Specification | Value | Description |
|---|---|---|
| Recommended Image Size | 10,000 pixels² | Optimal dimensions for accurate clinical analysis |
| Supported Formats | JPEG, PNG | Standard image formats for medical photography |
| Encoding Method | Base64 | Secure transmission format for API integration |
Image Capture Device Requirements
Healthcare providers and patients use various image capture devices to photograph skin structures for analysis by the Legit.Health Plus device. To ensure optimal performance and accurate clinical results, image capture devices must meet the following minimum specifications:
Camera Specifications
In regard to the camera, technical requirements for the Legit.Health medical device are:
| Feature | Relevance | Notes |
|---|---|---|
| Recommended Image Dimensions | ≥ 10,000 px² (e.g., 4000×2500 px) | Ensures sufficient detail for lesion analysis. |
| Image Formats | .JPG, .PNG | Standard, lossy/lossless formats for compatibility. |
| Minimum Camera Resolution | ≥ 12 MP | Needed for capturing fine dermal features. |
| Lens Aperture (Main) | ≤ ƒ/2.4 (wider) | Wider apertures (e.g., ƒ/1.8 (wide)–ƒ/2.2 (ultra-wide)) improve low-light performance. |
| Built-in Flash | Required | Consistent lighting improves color calibration and sharpness. |
| Autofocus | Required | Ensures lesion remains sharply focused at varying distances. |
| Adjustable Focus | Required | Macro mode or tap-to-focus enhances image clarity. |
| Macro camera | Recommended | Needed for close-up skin imaging (~2–5 cm distance). |
| Zoom | Recommended | Not essential unless image framing is problematic. |
| Flash Modes | Recommended | Manual flash control helps standardize capture conditions. |
The following features are not required or can be detrimental:
| Feature | Relevance | Notes |
|---|---|---|
| Front Camera | Irrelevant | Rear cameras are recommended due to higher quality and macro access. |
| Video Recording | Irrelevant | Irrelevant for still images. |
| Optical Image Stabilization (OIS) | Irrelevant | Helps reduce motion blur in handheld use. |
| HDR | Not recommended | It may distort the image. |
| Scene Optimizer or Enhancement Modes | Not recommended | It may distort the image. |
| Slow Motion | Irrelevant | Irrelevant for still images. |
Resolution Requirements
- Minimum Resolution: 12 megapixels (MP)
- Purpose: High-resolution imaging ensures sufficient detail capture for accurate computer vision analysis
- Clinical Impact: Higher resolution enables detection of subtle clinical signs and features
Lighting Capabilities
- Built-in Flash: Required for consistent illumination
- Function: Provides uniform lighting conditions across different environments
- Clinical Benefit: Consistent lighting highlights skin structures effectively and reduces image quality variability
- Reference: Detailed guidance available in How to Take Pictures
Focus System
- Adjustable Focus: Essential for sharp, clear image capture
- Requirement: Manual or automatic focus adjustment capabilities
- Clinical Importance: Proper focus ensures accurate detail capture necessary for effective device analysis
- Best Practices: Follow focus guidelines in How to Take Pictures
Additional Considerations
Image Quality Optimization
For best results, ensure image capture devices meet or exceed these minimum specifications. Higher quality images lead to more accurate clinical analysis and better diagnostic support.
Compatibility
The device is designed to work with images from a wide range of modern smartphones, tablets, and dedicated medical cameras that meet these specifications.