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NVIDIA_CSI_SETTINGS_FIX.md

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Nvidia CSI Camera Settings Fix

Issues Fixed

1. Save Button Disabled ✓ FIXED

Problem: The Save button was disabled after changing gain/exposure values in the Edit Image Settings page.

Root Cause: The button was checking camera connection status for all camera types, but Nvidia CSI cameras don't use the Arvis camera connection system.

Solution:

  • Changed the condition to only check camera status for Arvis cameras
  • Added form validation state check for all camera types
  • Save button now enabled when form is valid for Nvidia CSI cameras

2. Gain/Exposure Not Affecting Image ⚠️ IN PROGRESS

Problem: Changing gain and exposure values in the UI doesn't reliably affect the captured image brightness.

Status: Config file is being updated correctly (verified with jq), but nvarguscamerasrc may not be applying the settings.

Possible Root Causes:

  1. Auto-exposure (AE) is enabled by default and overriding manual settings
  2. nvarguscamerasrc parameter format may be incorrect
  3. Camera firmware may have limitations on manual control

Current Solution Attempt:

  • Added aeantibanding=0 parameter to disable auto-exposure antibanding
  • Using correct parameter format: exposuretimerange="$EXPOSURE $EXPOSURE" and gainrange="$GAIN $GAIN"
  • Added debug logging to track when settings change

Next Steps for Testing:

  1. Run check_csi_service.sh to verify service is reading config changes
  2. Run test_nvargus_params.sh to test different parameter combinations
  3. Check service logs: sudo journalctl -u nvidia-csi-capture.service -f
  4. Try extreme values (very dark vs very bright) to see if any change occurs

Files Modified

Frontend

  • src/frontend/src/components/image-settings/constants.ts

    • GAIN_MAX: 100 → 10.625
    • EXPOSURE_MIN: 1 → 13000
    • EXPOSURE_MAX: 150000 → 683709000

  • src/frontend/src/components/image-settings/EditImageSettingsPage.tsx

    • Save button now only checks camera status for Arvis cameras

  • src/frontend/src/components/image-settings/details-input/EditImageSettingsInput.tsx

    • Updated constraint text to clarify units and ranges

Backend

  • src/backend/gstreamer/pipeline_builder.py

    • Default gain: 1 → 2
    • Default exposure: 500 → 100000

  • src/backend/utils/config/default_camera_configurations.json

    • Added default gain and exposure values for Nvidia CSI

Host Scripts

  • src/host_scripts/nvidia_csi_capture.sh
    • Updated all default values to gain=2, exposure=100000

Camera Specifications (IMX219)

  • Resolution: 3264x2464 @ 21fps
  • Analog Gain Range: 1.0 to 10.625
  • Exposure Range: 13000 to 683709000 nanoseconds (0.013ms to 683.7ms)

Testing

After deploying these changes:

  1. Create a new Nvidia CSI image source or edit existing one
  2. Go to Edit Image Settings
  3. Adjust gain (1.0-10.625) and exposure (13000-683709000)
  4. Save button should be enabled
  5. Image brightness should change according to the settings
  6. Settings are written to /aws_dda/nvidia-csi-capture/config.json
  7. Host service reads config and applies to nvarguscamerasrc