ESP32 identifying and tracking

[steliosaath]

Hi I want to make a pan tilt camera using esp32 camera (ai thinker) and a FTDI. I want the servos to move/track the object according the position (x,y)

I use the machine learning "edge impulse" and I uploaded photos from the object I want to track and identify

First, I took the existing edge impulse code and I added( in order to find the center point )a line that calculates the center using the height and width of bounding_boxes

But the servos the don’t move accordingly they move a bit off

Then shawn_edgeimpulse from edge impulse team answered to my question

Bounding box information (x, y, width, height) are given in pixels. So, when you calculate center coordinates (centerX and centerY), those are pixels (from 0 to whatever the width/height of your image is). Assuming you are using the Arduino servo library, the Servo.write() method expects an angle in degrees (0 to 180). You need to translate center coordinates in pixels to an angle to pass to your servos.

So I modify the code and look like this, still not working ;/

.
.
.
int servo_min_angle = 0;   
int servo_max_angle = 180; 
int image_width = 48;      
int image_height = 48;
.
.
.
void loop()
{
for (size_t ix = 0; ix < result.bounding_boxes_count; ix++) {
    auto bb = result.bounding_boxes[ix];
    if (bb.value == 0) {
        continue;
    }

    int servoX_angle = map(bb.x, 0, image_width, servo_min_angle, servo_max_angle);
    int servoY_angle = map(bb.y, 0, image_height, servo_min_angle, servo_max_angle);

    servoX.write(servoX_angle);
    servoY.write(servoY_angle);

    ei_printf("    %s (%f) [ x: %u, y: %u, width: %u, height: %u ]\n", bb.label, bb.value, bb.x, bb.y, bb.width, bb.height);
}
}

[pert]

I moved your topic to a more appropriate forum category @steliosaath.

The Nano ESP32 category you chose is only used for discussions directly related to the Arduino Nano ESP32 board.

In the future, please take the time to pick the forum category that best suits the subject of your question. There is an "About the _____ category" topic at the top of each category that explains its purpose.

Thanks in advance for your cooperation.