Hand Gesture Detection ML Application

Description

The Hand Gesture Detection application is an ML-based computer vision solution designed for real-time gesture recognition with hand detection, single-hand tracking, and hand key-point estimation. The application detects hands in every frame, tracks one hand across frames, identifies one key point (at the center) for each hand location, and classifies the hand pose into one of the supported gesture classes. This use case supports HD resolution.

The latest example structure uses a common application source tree with board-specific hardware setup kept under hw/<BOARD>/. For this app:

• Common application sources such as main.c, uc_hand_gesture_detection.c, and uc_hand_gesture_detection.h stay in the app root.

• Application defconfigs are stored under configs/.

• Board and hardware-specific setup is selected from hw/<BOARD>/, for example hw/SR110_RDK/.

The application can also be exported and built as a standalone app repository. In that flow, keep this app in its own directory, point SRSDK_DIR to the SDK root, and build from the app directory itself. For the full application workflow model, see Astra MCU SDK User Guide.

Supported Boards

This application supports:

• SR110_RDK

Select the defconfig that matches your target board, and the build system will pick the corresponding board-specific hardware setup from hw/<BOARD>/.

Prerequisites

• Choose one setup path:

  • CLI: Setup and Install SDK using CLI

  • VS Code: Setup and Install SDK using VS Code

Hardware Requirements

• Sensor Adapter (included with the Astra Machina Micro kit)

• OV5647 Camera Sensor

Test Case Selection

Before building, choose the testcase defconfig that matches both your target board and the transfer mode you want to validate.

You can:

• Select the required defconfig directly from the application’s configs/ directory.

• Run make list_defconfigs from the application directory to list all supported defconfigs.

Available defconfigs:

• sr110_rdk_cm55_hand_gesture_detection_defconfig

Building and Flashing the Example using VS Code and CLI

Use the VS Code flow described in the SR110 guide and the VS Code Extension guide:

• SR110 Build and Flash with VS Code

• Astra MCU SDK VS Code Extension User Guide

Build (VS Code):

1. Open Build and Deploy -> Build Configurations.

2. Select the hand_gesture_detection project configuration in the Project Configuration dropdown.

3. Build with Build (SDK+Project) for the first build, or Build (Project) for rebuilds.

Build (CLI):

1. Build from the application directory itself:

   cd <sdk-root>/examples/vision_examples/uc_hand_gesture_detection
   export SRSDK_DIR=<sdk-root>
   make <app_defconfig> BUILD=SRSDK
   

2. For faster rebuilds when only app code changes, reuse the app-local installed SDK package:

   cd <sdk-root>/examples/vision_examples/uc_hand_gesture_detection
   export SRSDK_DIR=<sdk-root>
   make build
   

3. If this app has been exported to its own repository, use the same commands from that exported app directory after setting SRSDK_DIR to the SDK root.

Build outputs (CLI):

• Application binary: <app-dir>/out/<target>/release/<target>.elf

• App-local SDK package: <app-dir>/install/<BOARD>/<BUILD_TYPE>/

Flash (VS Code):

1. Use Image Conversion to generate the flash image.

2. In Image Conversion, open Advanced Configurations and edit NVM_data.json.

3. Set model flash offsets in NVM_data.json:

   • image_offset_Model_A_offset: 00607000

   • image_offset_Model_B_offset: 00737000

4. In Image Flashing (SWD/JTAG), flash the model binaries first:

   • hand_gesture_detection_flash(1280x704).bin at 0x607000

   • hand_gesture_detection_flash(320x320).bin at 0x737000

5. Flash the generated firmware image (B0_flash_full_image_GD25LE128_67Mhz_secured.bin).

Flash (CLI):

1. Activate the SDK venv (required for image generation tools):

   # Linux/macOS
   source <sdk-root>/.venv/bin/activate
   # Windows PowerShell
   .\.venv\Scripts\Activate.ps1
   

2. Generate the flash image:

   cd <sdk-root>/tools/srsdk_image_generator
   python srsdk_image_generator.py \
     -B0 \
     -flash_image \
     -sdk_secured \
     -spk "<sdk-root>/tools/srsdk_image_generator/Inputs/spk_rc4_1_0_secure_otpk.bin" \
     -apbl "<sdk-root>/tools/srsdk_image_generator/Inputs/sr100_b0_bootloader_ver_0x012F_ASIC.axf" \
     -m55_image "<sdk-root>/examples/vision_examples/uc_hand_gesture_detection/out/sr110_cm55_fw/release/sr110_cm55_fw.elf" \
     -flash_type "GD25LE128" \
     -flash_freq "67"
   

3. Flash model binaries first:

   cd <sdk-root>
   python tools/openocd/scripts/flash_xspi_tcl.py \
     --cfg_path tools/openocd/configs/sr110_m55.cfg \
     --image examples/vision_examples/uc_hand_gesture_detection/models/hand_gesture_detection_flash(1280x704).bin \
     --flash-offset 0x607000
   
   python tools/openocd/scripts/flash_xspi_tcl.py \
     --cfg_path tools/openocd/configs/sr110_m55.cfg \
     --image examples/vision_examples/uc_hand_gesture_detection/models/hand_gesture_detection_flash(320x320).bin \
     --flash-offset 0x737000
   

4. Flash the firmware image:

   cd <sdk-root>
   python tools/openocd/scripts/flash_xspi_tcl.py \
     --cfg_path tools/openocd/configs/sr110_m55.cfg \
     --image tools/srsdk_image_generator/Output/B0_Flash/B0_flash_full_image_GD25LE128_67Mhz_secured.bin \
     --erase-all
   

---

Running the Application using VS Code Extension

Windows note: Ensure the USB drivers are installed for streaming. See the Zadig steps in
SR110 Build and Flash with VS Code.

1. In VS Code, open Video Streamer from the Synaptics sidebar.

   

2. For logging output, click SERIAL MONITOR and connect to the DAP logger port on J14.

   • To make it easier to identify, ensure only J14 is plugged in (not J13).

   • The logger port is not guaranteed to be consistent across OSes. As a starting point:

     • Windows: try the lower-numbered J14 COM port first.

     • Linux/macOS: try the higher-numbered J14 port first.

   • If you do not see logs after a reset, switch to the other J14 port.

3. In the Video Streamer dropdown, select the J13 COM port.

   • Plug in J13 and press RESET on the board.

   • Windows: select the newly enumerated COM port.

   • Linux/macOS: select the lower-numbered COM port of the two newly enumerated ports.

4. Use the Video Streamer controls:

   a. Select HAND_GESTURE_DETECTION from the UC ID dropdown.
   b. Set RGB Demosaic to BayerGBRG.
   c. Click Create Use Case.
   d. Click Start Use Case (a Python window opens and the video stream appears).

   

5. For logs, use the LOGGER tab when needed.

6. Change Visualization Modes as needed:

   • Smart TV Gesture Control

   • 720p

   • 320x320

   • Text only

   

7. Autorun use cases: If autorun is enabled, click Connect Image Source to open the video stream pop-up.

Supported Hand Gestures

The following hand gestures are supported:

Gesture	Description
One	One finger raised (index finger).
Two	Two fingers raised.
Three	Three fingers raised.
Four	Four fingers raised.
Palm	Open palm with five fingers raised.
Fist	Closed fist with fingers folded inward.
Thumbs Up	Thumb raised upward with other fingers folded.
Thumbs Down	Thumb pointed downward with other fingers folded.
Pinch	Thumb and index finger brought close together (pinching pose).

Gesture one

Gesture two

Gesture Three

Gesture four

Gesture palm

Gesture fist

Gesture Thumbs Up

Gesture Thumbs Down

Gesture Pinch