BufferedImage getRGB help

[ivory ravine]

This image always output zero for rgb

File input = new File(pathToImage);
Assertions.assertTrue(input.canRead());
BufferedImage image = ImageIO.read(input);
int width = image.getWidth();
int height = image.getHeight();
System.out.println(width);
System.out.println(height);
nbIndividu = Math.min(width * height, nbIndividu);
double [] [] decodedImage = new double [nbIndividu] [3] ;
int i = 0;
for (int x = 0; x < width; x++) {
  for (int y = 0; y < height; y++) {
    int rgb = image.getRGB(x, y);

[dry vine]

Detected code, here are some useful tools:

Formatted code

File input = new File(pathToImage);
Assertions.assertTrue(input.canRead());
BufferedImage image = ImageIO.read(input);
int width = image.getWidth();
int height = image.getHeight();
System.out.println(width);
System.out.println(height);
nbIndividu = Math.min(width * height, nbIndividu);
double [] [] decodedImage = new double [nbIndividu] [3] ;
int i = 0;
for (int x = 0; x < width; x++) {
  for (int y = 0; y < height; y++) {
    int rgb = image.getRGB(x, y);

<@&987246399047479336> please have a look, thanks.

[dry vine]

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[reef copper]

Could you upload the image here? @ivory ravine

[ivory ravine]

I'm trying to affect each pixel value to a 2D array where red, green, blue are columns.

But the RGB value encoded between 0 and 255 always returns 0 for PNG and -1 for JPEG.

Thanks @reef copper

[regal fulcrum]

Thats because your png image is transparent to 80%

So of cours there is just no color on that spots

[rapid acorn]

i tink you need to compile x,y

NVM

its double rounds

[rapid acorn]

so you get:

for (int x = 0; x<width; x++);{
for(int y=0; y<width; y++);{
//in these upcoming operators they wll nested where all variables are defined
int rgb = getImage(x,y);
decodedImage[i][0] = (rgb>>16) & 0xFF;
decodedImagine[i][1] = (rgb>>8) &0xFF;
decodedImage[i][2]= (rgb >>0) & 0xFF;
i++;
}
}

[dry vine]

Detected code, here are some useful tools:

Formatted code

so you get : for (int x = 0; x < width; x++);
  {
  for (int y = 0; y < width; y++);
    {
    //in these upcoming operators they wll nested where all variables are defined
    int rgb = getImage(x, y);
    decodedImage[i] [0]  = (rgb >> 16) & 0xFF;
    decodedImagine[i] [1]  = (rgb >> 8) & 0xFF;
    decodedImage[i] [2]  = (rgb >> 0) & 0xFF;
    i++;
  }
}

[ivory ravine]

I think I need to change the color model of the picture.

I also converted the picture into JPEG

And it won't read it.

Perhaps I should try another color profile

[ivory ravine]

I found this nice workaround using Raster from BufferedImage::getData:

public static Population process(String pathToImage, int nbIndividu) throws IOException
        {
        BufferedImage image;
            {
            File file = new File(pathToImage);
            InputStream input = new FileInputStream(file.getAbsoluteFile());
            ImageInputStream stream = ImageIO.createImageInputStream(input);
            image = ImageIO.read(stream);
            }

        int height = image.getHeight();
        int width = image.getWidth();

        nbIndividu = Math.min(width * height, nbIndividu);

        double[][] decodedImage = new double[nbIndividu][4];

        Raster data = image.getData();

        int i = 0;
        for(int x = 0; x < width; x++)
            {
            for(int y = 0; y < height; y++, i++)
                {
                if (i >= nbIndividu)
                    {
                    return new Population(decodedImage);//
                    }

                data.getPixel(x, y, decodedImage[i]);
                }
            }

        return null;
        }

[dry vine]

Detected code, here are some useful tools:

Formatted code

public static Population process(String pathToImage, int nbIndividu) throws IOException {
  BufferedImage image;
    {
    File file = new File(pathToImage);
    InputStream input = new FileInputStream(file.getAbsoluteFile());
    ImageInputStream stream = ImageIO.createImageInputStream(input);
    image = ImageIO.read(stream);
  }
  int height = image.getHeight();
  int width = image.getWidth();
  nbIndividu = Math.min(width * height, nbIndividu);
  double [] [] decodedImage = new double [nbIndividu] [4] ;
  Raster data = image.getData();
  int i = 0;
  for (int x = 0; x < width; x++) {
    for (int y = 0; y < height; y++, i++) {
      if (i >= nbIndividu) {
        return new Population(decodedImage);
        //
      }
      data.getPixel(x, y, decodedImage[i] );
    }
  }
  return null ;
}

[ivory ravine]

It works now

[4] -> is for RGBA; red, green, blue, alpha