Esempio n. 1
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 // returns a value specifying some kind of average brightness in the image.
 protected int getAverageBrightness(BufferedImage img) {
   Raster r = img.getData();
   int total = 0;
   for (int y = 0; y < r.getHeight(); y++) {
     for (int x = 0; x < r.getWidth(); x++) {
       total += r.getSample(r.getMinX() + x, r.getMinY() + y, 0);
     }
   }
   return (int) (total / ((r.getWidth() / factorD) * (r.getHeight() / factorD)));
 }
Esempio n. 2
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  public static BufferedImage toGrayScale(BufferedImage image) {
    BufferedImage result =
        new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
    Raster raster = image.getData();
    WritableRaster grayRaster = result.getRaster();
    int height = raster.getHeight();
    int sample = 0;

    for (int x = 0; x < raster.getWidth(); ++x) {
      for (int y = 0; y < height; ++y) {

        sample = raster.getSample(x, y, 0) + raster.getSample(x, y, 1) + raster.getSample(x, y, 2);

        grayRaster.setSample(x, y, 0, (int) ((float) sample / 3.0));
      }
    }
    return result;
  }
Esempio n. 3
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  /**
   * Paint the image onto a Graphics object. The painting is performed tile-by-tile, and includes a
   * grey region covering the unused portion of image tiles as well as the general background. At
   * this point the image must be byte data.
   */
  public synchronized void paintComponent(Graphics g) {

    Graphics2D g2D = null;
    if (g instanceof Graphics2D) {
      g2D = (Graphics2D) g;
    } else {
      return;
    }

    // if source is null, it's just a component
    if (source == null) {
      g2D.setColor(getBackground());
      g2D.fillRect(0, 0, componentWidth, componentHeight);
      return;
    }

    int transX = -originX;
    int transY = -originY;

    // Get the clipping rectangle and translate it into image coordinates.
    Rectangle clipBounds = g.getClipBounds();

    if (clipBounds == null) {
      clipBounds = new Rectangle(0, 0, componentWidth, componentHeight);
    }

    // clear the background (clip it) [minimal optimization here]
    if (transX > 0
        || transY > 0
        || transX < (componentWidth - source.getWidth())
        || transY < (componentHeight - source.getHeight())) {
      g2D.setColor(getBackground());
      g2D.fillRect(0, 0, componentWidth, componentHeight);
    }

    clipBounds.translate(-transX, -transY);

    // Determine the extent of the clipping region in tile coordinates.
    int txmin, txmax, tymin, tymax;
    int ti, tj;

    txmin = XtoTileX(clipBounds.x);
    txmin = Math.max(txmin, minTileX);
    txmin = Math.min(txmin, maxTileX);

    txmax = XtoTileX(clipBounds.x + clipBounds.width - 1);
    txmax = Math.max(txmax, minTileX);
    txmax = Math.min(txmax, maxTileX);

    tymin = YtoTileY(clipBounds.y);
    tymin = Math.max(tymin, minTileY);
    tymin = Math.min(tymin, maxTileY);

    tymax = YtoTileY(clipBounds.y + clipBounds.height - 1);
    tymax = Math.max(tymax, minTileY);
    tymax = Math.min(tymax, maxTileY);
    Insets insets = getInsets();

    // Loop over tiles within the clipping region
    for (tj = tymin; tj <= tymax; tj++) {
      for (ti = txmin; ti <= txmax; ti++) {
        int tx = TileXtoX(ti);
        int ty = TileYtoY(tj);

        Raster tile = source.getTile(ti, tj);
        if (tile != null) {
          DataBuffer dataBuffer = tile.getDataBuffer();

          WritableRaster wr = tile.createWritableRaster(sampleModel, dataBuffer, null);

          BufferedImage bi =
              new BufferedImage(colorModel, wr, colorModel.isAlphaPremultiplied(), null);

          // correctly handles band offsets
          if (brightnessEnabled == true) {
            SampleModel sm =
                sampleModel.createCompatibleSampleModel(tile.getWidth(), tile.getHeight());

            WritableRaster raster = RasterFactory.createWritableRaster(sm, null);

            BufferedImage bimg =
                new BufferedImage(colorModel, raster, colorModel.isAlphaPremultiplied(), null);

            // don't move this code
            ByteLookupTable lutTable = new ByteLookupTable(0, lutData);
            LookupOp lookup = new LookupOp(lutTable, null);
            lookup.filter(bi, bimg);

            g2D.drawImage(bimg, biop, tx + transX + insets.left, ty + transY + insets.top);
          } else {
            AffineTransform transform;

            transform =
                AffineTransform.getTranslateInstance(
                    tx + transX + insets.left, ty + transY + insets.top);

            g2D.drawRenderedImage(bi, transform);
          }
        }
      }
    }
  }
Esempio n. 4
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  /**
   * Loads PNG files and returns the result as an int[][]. The only PNG formats permitted are those
   * with up to 256 grays (including simple black and white) or indexed colors from an up to
   * 256-sized color table. Each integer value represents the gray level or the color table index
   * value of the pixel. The Y dimension is not flipped.
   */
  public static int[][] loadPNGFile(InputStream str) throws IOException {
    // read the bytes into a byte array
    BufferedInputStream stream = new BufferedInputStream(str);
    ArrayList list = new ArrayList();
    int count = 0;
    while (true) {
      byte[] buffer = new byte[16384 * 16];
      int len = stream.read(buffer);
      if (len <= 0) // all done
      break;
      else if (len < buffer.length) {
        byte[] buf2 = new byte[len];
        System.arraycopy(buffer, 0, buf2, 0, len);
        buffer = buf2;
      }
      count += len;
      list.add(buffer);
    }
    byte[] data = new byte[count];
    int cur = 0;
    for (int i = 0; i < list.size(); i++) {
      byte[] b = (byte[]) (list.get(i));
      System.arraycopy(b, 0, data, cur, b.length);
      cur += b.length;
    }

    // Next convert the byte array to a buffered image
    BufferedImage image = ((ToolkitImage) (new ImageIcon(data).getImage())).getBufferedImage();

    // Is the color model something we can use?
    int type = image.getType();
    if (type == BufferedImage.TYPE_BYTE_BINARY || type == BufferedImage.TYPE_BYTE_GRAY) {
      int w = image.getWidth();
      int h = image.getHeight();
      int[][] result = new int[w][h];
      // obviously this could be done more efficiently
      for (int i = 0; i < w; i++)
        for (int j = 0; j < h; j++) result[i][j] = (image.getRGB(i, j) & 0xFF);
      return result;
    } else if (type == BufferedImage.TYPE_BYTE_INDEXED) {
      Raster raster = image.getRaster();
      if (raster.getTransferType() != DataBuffer.TYPE_BYTE) // uh oh
      throw new IOException("Input Stream must contain an image with byte data if indexed.");
      byte[] pixel = new byte[1];
      int w = image.getWidth();
      int h = image.getHeight();
      int[][] result = new int[w][h];
      // obviously this could be done more efficiently
      for (int i = 0; i < w; i++)
        for (int j = 0; j < h; j++) {
          result[i][j] = ((byte[]) (raster.getDataElements(i, j, pixel)))[0];
          if (result[i][j] < 0) result[i][j] += 256;
        }
      return result;
    }
    // else if (type == TYPE_USHORT_GRAY)   // at present we don't handle shorts
    //    {
    //    }
    else
      throw new IOException(
          "Input Stream must contain a binary, byte-sized grayscale, or byte-sized indexed color scheme: "
              + image);
  }
Esempio n. 5
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 public Raster getRaster(int x, int y, int w, int h) {
   return Raster.createBandedRaster(0, 0, 0, 0, NULL_POINT);
 }