Motion Detection

Core Library Questions

pooterror

in Core Library Questions • 1 year ago

Hi I've been working on this sketch where the elements of the pattern change size based on the brightness of the video input. I want to change it so the pattern changes based on movement of the video input. So that I don't have to rely as much on lighting etc for the sketch to work properly.

Any help or pointers would be great.

Thanks

Sam

import processing.video.*;
final int VIDEO_WIDTH = 800;
final int VIDEO_HEIGHT = 600;
Capture video;
int w = 20;
Spot[][] sp;
color[] c = new color[36];
int cols = VIDEO_WIDTH / w;
int rows = VIDEO_HEIGHT / w;
void setup() {
size(VIDEO_WIDTH, VIDEO_HEIGHT, P2D);
smooth();
//////Colours/////////
c[0] = color(#f4b264);
c[1] = color(#bee5e4);
c[2] = color(#fe022b);
c[3] = color(#082f56);
c[4] = color(#f8f3d6);
c[5] = color(#fceea7);
c[6] = color(#ff7101);
c[7] = color(#f1d7ca);
c[8] = color(#ffafc3);
c[9] = color(#abe6e2);
c[10] = color(#e2e8ce);
c[11] = color(#ffcb00);
c[12] = color(#aae354);
c[13] = color(#ddb0b7);
c[14] = color(#d2e6b5);
c[15] = color(#77a3be);
c[16] = color(#005c9d);
c[17] = color(#bb3325);
c[18] = color(#fdd4e2);
c[19] = color(#0dbbde);
c[20] = color(#643324);
c[21] = color(#99e1d3);
c[22] = color(#ff92a9);
c[23] = color(#a7bbba);
c[24] = color(#d0e099);
c[25] = color(#00b14b);
c[26] = color(#0376b9);
c[27] = color(#fedf2d);
c[28] = color(#fbd362);
c[29] = color(#fe5900);
c[30] = color(#4fb900);
c[31] = color(#fdd4e2);
c[32] = color(#ddb0b7);
c[33] = color(#a9998a);
c[34] = color(#77a3be);
c[35] = color(#bdb0b7);
///////////////////////
sp = new Spot[cols][rows];
for (int i = 0; i < cols; i++) {
for (int j = 0; j < rows; j++) {
sp[i][j] = new Spot(i * w + (w/2), j * w + (w/2), w, c[int(random(0, 35))]);
}
}
video = new Capture(this, cols, rows, 24);
}
void draw() {
background(255);
if (video.available()) {
video.read();
}
for (int i = 0; i < cols; i++) {
for (int j = 0; j < rows; j++) {
int x = i*w;
int y = j*w;
int loc = (video.width - i - 1) + j*video.width;
color c = video.pixels[loc];
float sz = (brightness(c)/255.0)*w;
float csz = constrain(sz, 5, w);
sp[i][j].display(csz);
}
}
}
//////////////////////////////////////////////////////////
class Spot {
// Variables
float x;
float y;
float w;
color c;
// Constructor
Spot(float xpos, float ypos, float wspot, color cspot) {
x = xpos;
y = ypos;
w = wspot;
c = cspot;
}
// Functions
void display(float w) {
fill(c);
noStroke();
ellipseMode(CENTER);
ellipse(x, y, w, w);
}
}

Replies(2)

PhiLho

Re: Motion Detection

1 year ago

I don't know much about motion detection, but your code calls for some remarks:
- color(#ABCDEF) is a redundant call. You can use #ABCDEF directly.
- There is a syntax for easy array initialization, removing the need to write all the indexes...
Instead of color[] c = new color[36]; then initializing each slot in setup(), try:
color[] c =
{
#f4b264,
#bee5e4,
#fe022b,
#082f56,
#f8f3d6,
#fceea7,
#ff7101,
#f1d7ca,
#ffafc3,
#abe6e2,
#e2e8ce,
#ffcb00,
#aae354,
#ddb0b7,
#d2e6b5,
#77a3be,
#005c9d,
#bb3325,
#fdd4e2,
#0dbbde,
#643324,
#99e1d3,
#ff92a9,
#a7bbba,
#d0e099,
#00b14b,
#0376b9,
#fedf2d,
#fbd362,
#fe5900,
#4fb900,
#fdd4e2,
#ddb0b7,
#a9998a,
#77a3be,
#bdb0b7,
};
Same size, but easier to type (here I just used a regular expression in my editor to isolate the relevant parts) and to read. And faster, even if it is unimportant here.

pooterror

Re: Motion Detection

1 year ago

Thanks PhiLho that is a lot easier and more efficient, wish I knew this before I wrote all the indexes

Top Reply