scratchpad.md

Identify colors

grey

if ((R > 100) && (R < 700) && (R > G) && (G > B)) val = 1;

white

if ((R > 800) && (G > 800) && (B > 800)) val = 1;

Web

[[Drawbot@MfK#Prototypen|Prototyp #1]] Airsoft_Pellet_Bitmaps_(build_blog) [[Airsoft_Pellet_Bitmaps_(build_blog)#Farb-Erkennung|Prototyp #1]]

// // pellet sorter // color quantification of RGB measures //

String CSV_file = "RGB_values.csv";

ArrayList pellets; int max_pellet_id = 0;

void setup () { size(1000, 600); background (64);

pellets = new ArrayList(); read_pellet_colors();

String lines[] = loadStrings(CSV_file); println("there are " + lines.length + " lines"); for (int i = 0 ; i < lines.length; i++) { println(lines[i]); }

int x = 0, y = 0; int p_width = 50; int p_inner = p_width - 1;

textSize(9); textAlign(LEFT, CENTER);

for (int i = 0; i < lines.length; i ++) { if (lines[i].charAt(0) != '#') { String[] q = splitTokens(lines[i], ";"); float R = int(q[0]) / 4; float G = int(q[1]) / 4; float B = int(q[2]) / 4;

  stroke(64);
  fill(R, G, B);
  rect(x, y, p_inner, p_inner);
  
  noStroke();
  if (R + G + B < 300)
    fill(255);
  else
    fill(0);
        
  // normalization to max. read value
  float m = max(R, max(G, B));
  
  int qcolor = 0;
  float nR = 0, nG = 0, nB = 0;
  
  if (m == 0) {
    qcolor = 0;
  } else {
    nR = 100 * R / m;
    nG = 100 * G / m;
    nB = 100 * B / m;
  }  
  
  int ty = y + 6;
  int tx = x + 16;
  text("R " + nR, tx , ty);
  text("G " + nG, tx , ty + 10);
  text("B " + nB, tx , ty + 20);
  
  
  
  x = x + p_width;
  if (x > width) {
    x = 0;
    y = y + p_width;
  }
}

} }

// -------------------------------------------------------------- // pellet class // --------------------------------------------------------------

class pellet { int id; boolean enabled; float[] RGB = new float[3];

String name; color screen_color; char symbol;

pellet(int iR, int iG, int iB) { RGB[0] = iR; RGB[1] = iG; RGB[2] = iB;

enabled = true;

// name = ""; screen_color = color(RGB[0], RGB[1], RGB[2]); }

void set_RGB(int iR, int iG, int iB) { RGB[0] = iR; RGB[1] = iG; RGB[2] = iB; }

void set_color(color col) { RGB[0] = red(col); RGB[1] = green(col); RGB[2] = blue(col); }

void set_name(String iname) { name = iname; }

void set_symbol(char c) { symbol = c; }

void set_brightness_and_contrast(float brightness, float contrast) { for (int i = 0; i < 3; i ++) { RGB[i] = 128 + ((RGB[i] - 128) * contrast) + brightness; } }

float euclidian_distance(pellet p) { float dist = sqrt(sq(RGB[0] - p.RGB[0]) + sq(RGB[1] - p.RGB[1]) + sq(RGB[2] - p.RGB[2])); return(dist); }

color get_color() { color c; //c = color (max(0, min(255, int(RGB[0]))), max(0, min(255, int(RGB[1]))), max(0, min(255, int(RGB[2])))); c = color (RGB[0], RGB[1], RGB[2]); return(c); }

// add color components of another pellet void add_color(pellet p) { for (int i = 0; i < 3; i ++) RGB[i] += p.RGB[i]; }

void enable() { enabled = true; }

void disable() { enabled = false; }

void toggle() { enabled = !enabled; } }

// -------------------------------------------------------------- // read XML config file // --------------------------------------------------------------

void read_pellet_colors() { XML xml; xml = loadXML("pellet_colors.xml");

XML[] palette = xml.getChildren("palette"); String palette_name = palette[0].getContent(); println(palette_name);

XML[] children = xml.getChildren("pellet");

for (int i = 0; i < children.length; i++) { int enable = get_pellet_byte(children[i].getString("enable")); int id = get_pellet_byte(children[i].getString("id")); int red = get_pellet_byte(children[i].getString("red")); int green = get_pellet_byte(children[i].getString("green")); int blue = get_pellet_byte(children[i].getString("blue")); String name = children[i].getContent(); char symbol = children[i].getString("symbol").charAt(0);

pellets.add(new pellet(red, green, blue));

// color display name 
pellets.get(max_pellet_id).set_name(name);
pellets.get(max_pellet_id).set_symbol(symbol);

if (enable == 0)
  pellets.get(max_pellet_id).disable();

println(id + " " + hex(red)+ " " + hex(green)+ " " + hex(blue) + " / "+ name + "(" + symbol + ")");
  
max_pellet_id ++;

} }

// get XML parameter --> 1 unsigned byte, supports $xx hex format int get_pellet_byte(String s) { int i = 0;

if (s.length() > 0) { if (s.charAt(0) == '$') i = unhex(s.substring(1)); else i = int(s);

i = min(255, i);
i = max(0, i);

}
return (i); }