Camera LUT Support & User Guide

01. Setup & Permissions

Camera LUT is built to operate immediately with maximum privacy. The application requests only the strictly required hardware permission to function as a camera:

• Camera Permission (android.permission.CAMERA): Required to access the physical sensor hardware, stream camera frames to the viewfinder, and capture high-resolution still photographs.
• No Internet Permission: The app does not declare or use android.permission.INTERNET. No tracking, cloud syncing, telemetries, or external network requests can occur.
• Foreground Service (FOREGROUND_SERVICE_DATA_SYNC): Used when processing captured high-resolution frames asynchronously in the background so that rapid multi-shot capture does not freeze the viewfinder.

02. System & Hardware Requirements

To ensure smooth 3D LUT matrix interpolation and responsive frame rates, Camera LUT requires:

• Operating System: Android 10 (API level 29) or higher (Android 11, 12, 13, 14, 15, and 16 supported).
• Camera Subsystem: Android Camera2 API hardware level LIMITED, FULL, or LEVEL_3.
• Memory: 3 GB RAM or higher recommended for continuous multi-shot rendering.
• Storage: Standard internal device storage for saving photographs.

03. Where Photos Are Saved (Dual Save Architecture)

Camera LUT never overwrites your original capture. Every time you press the shutter, the pipeline saves two high-resolution JPEG files to your device's native media directory:

1. Unaltered Original:
   File pattern: LUTCamera_YYYYMMDD_HHMMSS_ORIGINAL.jpg
   The pristine frame straight from the camera sensor before any LUT or tonal correction was applied.
2. Enhanced Image:
   File pattern: LUTCamera_YYYYMMDD_HHMMSS_ENHANCED_<Scene>_<Strength>.jpg
   The finalized image with scene technical correction, tone curve, and selected 3D LUT applied.

Both files are saved to the public Android gallery folder: Pictures/SceneCamera

04. In-Depth Camera Controls

Top Tool Rack

• 3×3 Grid: Toggles rule-of-thirds grid lines for framing landscapes and horizons cleanly.
• Native HDR: Direct toggle for multi-exposure sensor capture on supported hardware sensors.
• Self-Timer: Cycles between Off, 3-second delay, and 10-second delay for hands-free framing.
• Aspect Ratio: Toggles sensor framing ratio (standard 4:3 full sensor frame or wide aspect).
• Settings: Quick access to sound, vibration feedback, and app information.

Viewfinder & Capture Controls

• AI Scene Pill: Shows real-time scene classifier reading. Tap to manually lock or change scene mode.
• Compare Button (◧): Press and hold anywhere on the compare pill to see the un-graded raw sensor feed. Release to return to the active 3D LUT look.
• Zoom (.5, 1×, 2, 5): Switches seamlessly between ultra-wide (.5) and standard (1×) physical sensors, or applies clean sensor crops (2×, 5×).
• Horizontal LUT Strip: Swipe horizontally along the lower tray to select your desired film look: Auto, Portra 400, Velvia 100, Pastry, Sunset, Twilight, Night Colors, Soft Day, or Tri-X 400.
• Strength Selector: Choose how heavily the grade blends: Natural (20%), Mid (45%), or Extreme (70%).
• Shutter Button: Ergonomic center trigger with glowing gradient ring. Immediate capture response with background saving.
• Camera Flip: Toggles smoothly between rear main camera and front selfie camera.

05. Common Troubleshooting

Why do some photos look different from the viewfinder preview?

The live viewfinder operates at real-time video preview resolution (1080p / 60fps) to ensure zero latency and smooth framing. When you press the shutter, the pipeline captures a full-resolution sensor frame (12MP, 50MP, or device maximum) and executes high-precision 3D trilinear interpolation and soft-knee tone mapping for pristine final clarity.

Can I shoot without an internet connection?

Yes! Camera LUT is completely self-contained. All ML Kit scene classification models, 3D LUT color cubes, and image processing algorithms reside locally on your phone. You can shoot in remote mountains, airplanes, or deep subways without Wi-Fi or cellular service.

How do I retrieve the original un-graded photo?

Every single capture automatically saves the original unedited JPEG alongside the enhanced photograph in Pictures/SceneCamera. You never have to worry about permanently altering or losing your original shot.