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tbintahir

set scaled image to new PImage

in Programming Questions • 2 years ago

Hi i have a 16x8 pixel image that i scale by a factor of 10 to 160x80 using

image(img, 0, 0, 160, 80)

command i wanted to know how can i use this newly scaled image in say openCV or is there a method to set this new scaled image to a new PImage.

1

Replies(5)

PhiLho

PhiLho

Re: set scaled image to new PImage

2 years ago

With a PGraphics (which is also a PImage), you can do:
graphic.image(img, 0, 0, 160, 80);

tbintahir

Re: set scaled image to new PImage

2 years ago

Hmm this is giving me a null pointer exception...

PhiLho

PhiLho

Re: set scaled image to new PImage

2 years ago

You have to provide code around my sample... Declare graphic variable, initialize it, etc.

tbintahir

Re: set scaled image to new PImage

2 years ago

Yeah i did do that... attached below is what i have, what i intend to do is pass this new image (graphic) to openCV

//Imports
import processing.serial.*;
import processing.video.*;
import blobDetection.*;
import fullscreen.*;
import hypermedia.video.*;
int cols = 16; // number of columns
int rows = 8; // number of rows
// Parssed Data test array
int[] parssedData = { 4095, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4095,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 4095, 4095, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 4095, 4095, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
4095, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4095};
int numPixels; // Total number of pixels on screen
int[] bgPixels; // Array to hold toatal pixels
PImage frame = createImage(16, 8, RGB);
PGraphics Gframe = createGraphics(160, 80, JAVA2D);
OpenCV opencv;
//BlobDetection theBlobDetection;
void setup()
{
//Setup application
size(160,80, JAVA2D);
numPixels = cols*rows; // calculate total pixles in frame
bgPixels = new int [numPixels]; //
opencv = new OpenCV(this);
opencv.allocate(width, height);
smooth();
}
void draw()
{
frame.loadPixels();
for (int i = 0; i < bgPixels.length; i ++ ) {
colorMode(RGB, 4095);
frame.pixels[i] = color(parssedData[i]);
}
frame.updatePixels();
// image(frame, 0, 0, 160, 80);
Gframe.image(frame, 0, 0, width, height);
image(Gframe, 0, 0);
}

tbintahir

Re: set scaled image to new PImage

2 years ago

Thanks i figured it out i needed beginDraw and endDraw

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