IP_13_Playing_Cards/docs/research_ImageRecognition.md

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### 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)
```cpp
#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
}