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IWR6843ISK: how to detect gesture behaviour in "64xx ISK - Multiple Gesture and Motion Detection" demo

Takatoshi Tsuji
Expert 1550 points
Part Number: IWR6843ISK


Dear support team,

I am investigating "64xx ISK - Multiple Gesture and Motion Detection" demo, by comapring "68xx AoP_ODS - Multiple Gesture and Motion Detection".

It seems "86xx ISK" version is supporting only 2 kinds of gesture; "Right to Left" and "Left and Right", which is realized by not machine learning but tracking algorithm.

Am I right ? If I am wrong, please kindly advise to me.

Best regards,

Taka

  • 0
    TI__Genius 10550 points

    Hi, 

    There is another thread where the discussions are on going with the same customer. Please let me know if this for the same group or different. 

    https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1029571/iwr6843-what-is-the-value-range-profile-of-relative-power-of-mmwave-demo-visualizer-in-demo-code

    Regards, 

    Sudharshan K N 

  • 0 in reply to Sudharshan KN
    Expert 1550 points

    Hello Sudharshan KN,

    He is my colleague but purpose of his question is different from me.

    Best regadrs,

    Taka

  • 0 in reply to Takatoshi Tsuji
    TI__Genius 10550 points

    Hi, 

    The models is based on NN and implements an inference model. The model parameters are defined in C:\ti\mmwave_industrial_toolbox_4_7_0\labs\gesture_recognition\68xx_multi_gesture_and_motion_det\src\common\ANN

    float gestureInferenceProcessing (float * featureVecLog, int32_t gestureCnt[], int32_t gestureCntPrev[])
    {
    float gestureOut;
    int32_t maxCheckFlag;
    /* Augment to the feature vectors with some filtered features. These new features
    * note the change in angle (in both azimuth and elevation) around the peak doppler. */
    angleDelta(&featureVecLog[AZIM_DELTA_IDX], // AzimDelta, the first new feature.
    &featureVecLog[ELEV_DELTA_IDX], // ElevDelta, the second new feature.
    &featureVecLog[MSS_FEATURE_IDX_WTDOPPLER*FEATURE_LENGTH], // WtDoppler[]
    &featureVecLog[MSS_FEATURE_IDX_WTAZIM*FEATURE_LENGTH], // WtAzim[]
    &featureVecLog[MSS_FEATURE_IDX_WTELEV*FEATURE_LENGTH]); // WtElev[]

    maxCheckFlag = maxCheck(&featureVecLog[MSS_FEATURE_IDX_WTDOPPLER*FEATURE_LENGTH]);


    /* Perform inference. */
    Inference(&featureVecLog[0], &gANN_struct_t);


    /* Some additional heuristics on the inferred probabilities. */
    gestureOut = postProcessing(gANN_struct_t.prob, gestureProbabilityLog, gestureTimeStamp, gestureCnt, gestureCntPrev, maxCheckFlag);

    return gestureOut;
    }

    Regards, 

    Sudharshan K N 

  • 0 in reply to Sudharshan KN
    Expert 1550 points

    Hello Sudhrahan  N,

    Excuse me that my query was wrong. Let me correct as below ;

    wrong> It seems "86xx ISK" version is supporting only 2 kinds of gesture; "Right to Left" and "Left and Right", which is realized by not machine learning but tracking algorithm.

    corrected> It seems "64xx ISK" version is supporting only 2 kinds of gesture; "Right to Left" and "Left and Right", which is realized by not machine learning but tracking algorithm.

    I suppose you replied about ANN used in "68xx AoP_ODS - Multiple Gesture and Motion Detection" demo, but I would like to know about "64xx  ISK - Multiple Gesture and Motion Detection" demo.

    Best regards,

    Taka

  • +1 in reply to Takatoshi Tsuji
    TI__Genius 10550 points

    Hi, 

    Yes for IWR64xx the implementation doesnt seem to use NN approach. 

    Regards, 

    Sudharshan K N