Lazer Tarayıcı İle 3D Modelleme Yapımı

Lazerden nesnenin üzerine düşen ışınlar nesnenin şeklini alırlar ve bu çizgiler  webcam üzerinden processing arayüze gönderilir.Gönderilen her çizginin 3 boyutlu koordinatları processingde işelenerek asc dosya uzantısında kaydedilir.Kaydedilen dosyayı meshlab 3d modelleme programına import ederek model oluşturulur.

Malzemeler:

1. Arduino
2. Mekaniği için lego
3. Step motor
4. Step motor sürücü
5. Batarya
6. Lineer lazer
7. Webcam

Elektronik Kısım:

Mekanik Kısımlar:

Arduino Yazılımı

#include <Stepper.h>
Stepper oki(48,8,9); //see stepper tutorial in arduino.cc for info about that
const int ledPin = 13; // the pin that the LED is attached to
int incomingByte; // a variable to read incoming serial data into
 
void setup() {
 // initialize serial communication:
 Serial.begin(9600);
 // initialize the LED pin as an output:
 pinMode(ledPin, OUTPUT);
 oki.setSpeed(60);
}
 
void loop() {
 // see if there's incoming serial data:
 if (Serial.available() > 0) {
 // read the oldest byte in the serial buffer:
 incomingByte = Serial.read();
 // if it's a capital H (ASCII 72), turn on the LED:
 if (incomingByte == 'S') {
 digitalWrite(ledPin, HIGH);
 oki.step(4);
 }
 // if it's an L (ASCII 76) turn off the LED:
 if (incomingByte == 'K') {
 digitalWrite(ledPin, LOW);
 }
 }
}

Processing Yazılımı

import codeanticode.gsvideo.*;
import processing.serial.*;
 
//objects
PFont f;
GSCapture cam;
Serial myPort;
PrintWriter output;
 
//colors
color black=color(0);
color white=color(255);
 
//variables
int itr; //iteration
float pixBright;
float maxBright=0;
int maxBrightPos=0;
int prevMaxBrightPos;
int cntr=1;
int row;
int col;
 
//scanner parameters
float odl = 210; //distance between webcam and turning axle, [milimeter], not used yet
float etap = 120; //number of phases profiling per revolution
float katLaser = 25*PI/180; //angle between laser and camera [radian]
float katOperacji=2*PI/etap; //angle between 2 profiles [radian]
 
//coordinates
float x, y, z; //cartesian cords., [milimeter]
float ro; //first of polar coordinate, [milimeter]
float fi; //second of polar coordinate, [radian]
float b; //distance between brightest pixel and middle of photo [pixel]
float pxmmpoz = 5; //pixels per milimeter horizontally 1px=0.2mm
float pxmmpion = 5; //pixels per milimeter vertically 1px=0.2mm
 
//================= CONFIG ===================
 
void setup() {
 size(800, 600);
 strokeWeight(1);
 smooth();
 background(0);
 
 //fonts
 f=createFont("Arial",16,true);
 
 //camera conf.
 String[] avcams=GSCapture.list();
 if (avcams.length==0){
 println("There are no cameras available for capture.");
 textFont(f,12);
 fill(255,0,0);
 text("Camera not ready",680,32);
 }
 else{
 println("Available cameras:");
 for (int i = 0; i < avcams.length; i++) {
 println(avcams[i]);
 }
 textFont(f,12);
 fill(0,255,0);
 text("Camera ready",680,32);
 cam=new GSCapture(this, 640, 480,avcams[0]);
 cam.start();
 }
 
 //Serial (COM) conf.
 println(Serial.list());
 myPort=new Serial(this, Serial.list()[0], 9600);
 
 //output file
 output=createWriter("skan.asc"); //plik wynikowy *.asc
 
 
 
}
 
//============== MAIN PROGRAM =================
 
void draw() {
 
 PImage zdjecie=createImage(cam.width,cam.height,RGB);
 cam.read();
 delay(2000);
 for (itr=0;itr<etap;itr++) {
 cam.read();
 zdjecie.loadPixels();
 cam.loadPixels();
 for (int n=0;n<zdjecie.width*zdjecie.height;n++){
 zdjecie.pixels[n]=cam.pixels[n];
 }
 zdjecie.updatePixels();
 set(20,20,cam);
 String nazwaPliku="zdjecie-"+nf(itr+1, 3)+".png";
 zdjecie.save(nazwaPliku);
 obroc();
 delay(500);
 }
 obroc();
 licz();
 noLoop();
 
}
 
void licz(){
 for (itr=0; itr<etap; itr++){
 
 String nazwaPliku="zdjecie-"+nf(itr+1, 3)+".png";
 PImage skan=loadImage(nazwaPliku);
 String nazwaPliku2="odzw-"+nf(itr+1, 3)+".png";
 PImage odwz=createImage(skan.width, skan.height, RGB);
 skan.loadPixels();
 odwz.loadPixels();
 int currentPos;
 fi=itr*katOperacji;
 println(fi);
 
 for(row=0; row<skan.height; row++){ //starting row analysis
 maxBrightPos=0;
 maxBright=0;
 for(col=0; col<skan.width; col++){
 currentPos = row * skan.width + col;
 pixBright=brightness(skan.pixels[currentPos]);
 if(pixBright>maxBright){
 maxBright=pixBright;
 maxBrightPos=currentPos;
 }
 odwz.pixels[currentPos]=black; //setting all pixels black
 }
 
 odwz.pixels[maxBrightPos]=white; //setting brightest pixel white
 
 b=((maxBrightPos+1-row*skan.width)-skan.width/2)/pxmmpoz;
 ro=b/sin(katLaser);
 //output.println(b + ", " + prevMaxBrightPos + ", " + maxBrightPos); //I used this for debugging
 
 x=ro * cos(fi); //changing polar coords to kartesian
 y=ro * sin(fi);
 z=row/pxmmpion;
 
 if( (ro>=-30) && (ro<=60) ){ //printing coordinates
 output.println(x + "," + y + "," + z);
 }
 
 }//end of row analysis
 
 odwz.updatePixels();
 odwz.save(nazwaPliku2);
 
 }
 output.flush();
 output.close();
}
 
void obroc() { //sending command to turn
 myPort.write('S');
 delay(50);
 myPort.write('K');
}

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