Embedded Files
Processing
Processing
Tasks:
Tasks:
- Use Capture class to read in live webcam feed
- Change number of pixels in images using resize() function
- Display the digital version of the output array using draw()
- Use arrays to cycle through the pixels in an image and modify them
- Send RGB values in array to Arduino
Testing:
Testing:
- Different modes of serial sending
- Different methods of reading in feed
Arduino
Arduino
Tasks:
Tasks:
- Read in RGB values
- Send RGB values to LEDs
Testing:
Testing:
- FastLED library
- NeoPixel library
Current Serial Processing
Current Serial Processing
PROCESS: Send the RGB values in three arrays — one for each value. Iterate through these arrays in Arduino and convert all three into one RGB color for each LED in the array. Then display those values.
PROCESS: Send the RGB values in three arrays — one for each value. Iterate through these arrays in Arduino and convert all three into one RGB color for each LED in the array. Then display those values.
Processing:
import processing.video.*;import processing.serial.*;Processing:
Capture cam;Serial myPort;void setup() { size(490, 490); //490,490 // w, h // 400, 500 println((Object[])Serial.list()); String portName = Serial.list()[0]; myPort = new Serial(this, portName, 9600); String[] cameras = Capture.list(); if (cameras.length == 0) { println("There are no cameras available for capture."); exit(); } else { println("Available cameras:"); for (int i = 0; i < cameras.length; i++) { println(i); println(cameras[i]); } } cam = new Capture(this, cameras[0]); cam.start();}
void captureEvent(Capture cam) { cam.read();}
void draw() { loadPixels(); cam.loadPixels(); String gSend = ""; String rSend = ""; String bSend = ""; for (int x = 0; x < cam.width; x+=92) { //cam.width 640 for (int y = 0; y < cam.height; y+=69) { //cam.height 480 int loc = x + y * cam.width; float r = red(cam.pixels[loc]); float g = green(cam.pixels[loc]); float b = blue(cam.pixels[loc]); r = constrain(r, 0, 255); g = constrain(g, 0, 255); b = constrain(b, 0, 255); //print(str(int(red)) + " "); if (gSend == "" || rSend == "" || bSend == "") { gSend = "G" + str(int(g)); rSend = "R" + str(int(r)); bSend = "B" + str(int(b)); } else { gSend = gSend + "," + str(int(g)); rSend = rSend + "," + str(int(r)); bSend = bSend + "," + str(int(b)); }
//problems might be: the video is live so the next pixel it gets can be from the new frame/image } }//end of nested for-loop myPort.write(gSend); delay(1500);//1500 println("g Sent"); myPort.write(rSend); delay(1500); println("r Sent"); myPort.write(bSend); println("b Sent"); delay(1500);}//end of method
Arduino:
Arduino:
#include <Adafruit_NeoPixel.h>#define PIN 5#define NUMPIXELS 49 //the size of our prototype arrayAdafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);int g[NUMPIXELS];int r[NUMPIXELS];int b[NUMPIXELS];int counter = 0;String valG = "";String valR = "";String valB = "";String val = "";
void setup() { pixels.begin(); pixels.show(); Serial.begin(9600);}
void loop() {
while (valG == "" || valR == "" || valB == "") { pixels.setPixelColor(25, pixels.Color(0, 0, 0)); pixels.show(); if (Serial.available()) { val = Serial.readString(); if (val.charAt(0) == 'G') { valG = val.substring(1); pixels.setPixelColor(0, pixels.Color(100, 0, 0)); pixels.show(); } if (val.charAt(0) == 'R') { valR = val.substring(1); pixels.setPixelColor(1, pixels.Color(0, 100, 0)); pixels.show(); } if (val.charAt(0) == 'B') { valB = val.substring(1); pixels.setPixelColor(2, pixels.Color(0, 0, 100)); pixels.show(); } } pixels.setPixelColor(25, pixels.Color(0, 50, 100)); pixels.show(); } for (int k = 0; k < NUMPIXELS; k++) { g[k] = valG.substring(0, valG.indexOf(',')).toInt(); //sets each value in the array as the corresponding value in the string --> atoi makes the string into an int valG = valG.substring(valG.indexOf(',') + 1); r[k] = valR.substring(0, valR.indexOf(',')).toInt(); //sets each value in the array as the corresponding value in the string --> atoi makes the string into an int valR = valR.substring(valR.indexOf(',') + 1); b[k] = valB.substring(0, valB.indexOf(',')).toInt(); //sets each value in the array as the corresponding value in the string --> atoi makes the string into an int valB = valB.substring(valB.indexOf(',') + 1); }// find a way to see what is being print out here ^ for (int i = 0; i < NUMPIXELS; i++) { pixels.setPixelColor(i, pixels.Color(g[i], r[i], b[i])); pixels.show(); } valG = ""; valR = ""; valB = ""; // delay(200);}
Preliminary Serial Processing
Preliminary Serial Processing
Tests whether RGB values can be sent, received, and displayed in our Processing-Arduino system.
Tests whether RGB values can be sent, received, and displayed in our Processing-Arduino system.
Processing:
Processing:
import processing.serial.*;Serial myPort;
void setup() { println((Object[])Serial.list()); //added String portName = Serial.list()[0]; // added myPort = new Serial(this, portName, 9600); //added}
void draw() { myPort.write("255,0,0"); println("green"); delay(2500); myPort.write("0,255,0"); println("red"); delay(2500); myPort.write("0,0,255"); println("blue"); delay(2500);}
Arduino:
Arduino:
#include <Adafruit_NeoPixel.h>#define PIN 5#define NUMPIXELS 50Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);int g, r, b;String val;
void setup() { pixels.begin(); pixels.show(); Serial.begin(9600);}
void loop() { if (Serial.available()) { val = Serial.readString(); } if (val.length() > 3) { int cIndex = val.indexOf(','); int nextCIndex = val.indexOf(',', cIndex + 1);
g = (val.substring(0, cIndex)).toInt(); r = (val.substring(cIndex + 1, nextCIndex)).toInt(); b = (val.substring(nextCIndex + 1)).toInt();
for(int k = 0; k < 50; k++){ pixels.setPixelColor(k, pixels.Color(g, r, b)); pixels.show(); delay(5); } delay(0); }}
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