IP_13_Playing_Cards/docs/research_ImageRecognition.md

Coordination between Arduino and Image Recognition

Feasibility and Frameworks

• Integration between Arduino and image recognition is feasible.
• Various small cameras like OV7670 are compatible with Arduino.
• Available image processing libraries:
  • OpenCV: Resource-intensive but widely used.
  • Alternatives: Cameramatcs or Pixy2, tailored for microcontrollers.
• Object recognition:
  • Pre-trained models or frameworks like TensorFlow Lite for Microcontrollers or EdgeImpulse suitable for microcontrollers.

Processing and Output

• Data processing on Arduino:
  • Camera detects cards, sends raw data to Arduino.
  • Arduino analyzes data and interprets recognized cards.
• Decision logic:
  • Implementation of decision logic on Arduino defining actions.
  • Possible speech output based on card recognition.

Energy Consumption

• Low power consumption or consistent power supply is desirable.

Note: Image processing on Arduino can be challenging due to limited resources and performance capabilities. Finding compromises may be necessary.

Frameworks

• TensorFlow Lite for Microcontrollers:
  • Executes machine learning models on resource-constrained devices.
• Edge Impulse:
  • Simplifies application development for microcontrollers, facilitates data collection, model training, and deployment.
• OpenMV:
  • Platform for computer vision on microcontrollers, supports basic image processing tasks.
• Arduino Libraries:
  • Example: Arduino Computer Vision Library.

Considerations

• Processing 10-15 playing cards simultaneously on Arduino can be challenging, considering resource limitations.
• Possibilities:
  1. Algorithm optimization.
  2. External processing unit.
  3. Prototype and test.

Example Code Collection

Image Recognition with Color Detection (Arduino)

#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_TCS34725.h>

#define RED_THRESHOLD 1000 // Threshold for red color detection

Adafruit_TCS34725 tcs = Adafruit_TCS34725(TCS34725_INTEGRATIONTIME_50MS, TCS34725_GAIN_4X);

void setup() {
  Serial.begin(9600);
  if (tcs.begin()) {
    Serial.println("Color sensor found!");
  } else {
    Serial.println("Color sensor not found. Check connection.");
    while (1);
  }
}

void loop() {
  uint16_t clear, red, green, blue;
  tcs.getRawData(&red, &green, &blue, &clear);
  
  if (red > RED_THRESHOLD) {
    Serial.println("Red color detected!");
    // Further actions for the detected card can be implemented here
  } else {
    Serial.println("No red color detected.");
  }
  
  delay(1000); // Delay between detection loops
}