Processing 1.0 - Processing Discourse - save the image of webcam, but not the whole screen

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Index › Programming Questions & Help › Video Capture, Movie Playback, Vision Libraries › save the image of webcam, but not the whole screen

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save the image of webcam, but not the whole screen (Read 1411 times)

save the image of webcam, but not the whole screen
Mar 25^th, 2010, 9:15pm

I would like to know how can I save the image of webcam, but not the whole screen? I have tried to use saveFrame(), but it only works for saving the whole screen and required the image of webcam shown on the screen. What if I want to save the image of webcam into my computer even the image doesn't display on the screen?

antiplastik

Re: save the image of webcam, but not the whole screen
Reply #1 - Mar 25^th, 2010, 11:21pm

Quote:

how can I save the image of webcam, but not the whole screen

Use get().

Quote:

What if I want to save the image of webcam into my computer even the image doesn't display on the screen

Use save() instead. On your image.

Code:

cam.read();
PImage cp = cam.get(10, 10, 20, 20);
cp.save("capture.png");

Re: save the image of webcam, but not the whole screen
Reply #2 - Mar 26^th, 2010, 8:22am

can I save more than 1 image by using save() ?
For example, save 1 image of cam every 5 mins.
By using save(); I can save cam image every 5 mins but the file keep being over-write.

Using saveFrame(), then I can save many files, but cannot save the cam image only.

How can I use save() to saving more than 1 image?

antiplastik

Re: save the image of webcam, but not the whole screen
Reply #3 - Mar 26^th, 2010, 9:43am

Code:

int nb_seconds, nb_images;

void setup() {
  // draw() will execute 1 time per second
  framerate(1);
}

void draw() {
  nb_seconds++;
  if (nb_seconds%300 == 0) {
    // this will execute every 300 seconds
    nb_images++;
    cam.read();
    PImage pg = cam.get(10, 10, 20, 20);
    pg.save("image_" + nb_images + ".png");
  }
}

HM YaBB Newbies Offline Posts: 8	Re: save the image of webcam, but not the whole screen Reply #4 - Mar 28^th, 2010, 6:48am thanks a lot~~!!

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