Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>You don't need a full blown Image processing library for simply resizing an image.</p> <p>The recommended approach is by using <strong>progressive bilinear scaling</strong>, like so (feel free to use this method as is in your code):</p> <pre><code>public BufferedImage scale(BufferedImage img, int targetWidth, int targetHeight) { int type = (img.getTransparency() == Transparency.OPAQUE) ? BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB; BufferedImage ret = img; BufferedImage scratchImage = null; Graphics2D g2 = null; int w = img.getWidth(); int h = img.getHeight(); int prevW = w; int prevH = h; do { if (w &gt; targetWidth) { w /= 2; w = (w &lt; targetWidth) ? targetWidth : w; } if (h &gt; targetHeight) { h /= 2; h = (h &lt; targetHeight) ? targetHeight : h; } if (scratchImage == null) { scratchImage = new BufferedImage(w, h, type); g2 = scratchImage.createGraphics(); } g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); g2.drawImage(ret, 0, 0, w, h, 0, 0, prevW, prevH, null); prevW = w; prevH = h; ret = scratchImage; } while (w != targetWidth || h != targetHeight); if (g2 != null) { g2.dispose(); } if (targetWidth != ret.getWidth() || targetHeight != ret.getHeight()) { scratchImage = new BufferedImage(targetWidth, targetHeight, type); g2 = scratchImage.createGraphics(); g2.drawImage(ret, 0, 0, null); g2.dispose(); ret = scratchImage; } return ret; } </code></pre> <p>Code modified and cleaned from the original at <a href="http://filthyrichclients.org" rel="noreferrer">Filthy Rich Clients</a>.</p> <hr> <p>Based on your comment, you can reduce quality and encode JPEG bytes like so:</p> <p><code>image</code> is the BufferedImage. </p> <pre><code>ByteArrayOutputStream os = new ByteArrayOutputStream(); ImageWriter writer = (ImageWriter) ImageIO.getImageWritersByFormatName("jpeg").next(); ImageWriteParam param = writer.getDefaultWriteParam(); param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); param.setCompressionQuality(0.2f); // Change this, float between 0.0 and 1.0 writer.setOutput(ImageIO.createImageOutputStream(os)); writer.write(null, new IIOImage(image, null, null), param); writer.dispose(); </code></pre> <p>Now, since <code>os</code> is a <code>ByteArrayOutputStream</code>, you can Base64 encode it.</p> <pre><code>String base64 = Base64.encode(os.toByteArray()); </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POImage Resizing in Java to reduce image size
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USLanguagesNamedAfterCofee
    1. USLanguagesNamedAfterCofee
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POImage Resizing in Java to reduce image size
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COI want to reduce image size (in bytes) after resizing it so that i can send it over a socket. The dataoutputstream says that the encoded string(Base64) is too large.
      singulars
      1. PO
      1. USMadeyedexter
    2. COBase64 encode JPEG bytes instead. You can use `ImageIO` for this.
      singulars
      1. PO
      1. USLanguagesNamedAfterCofee
    3. CO@Danish See my edit
      singulars
      1. PO
      1. USLanguagesNamedAfterCofee
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload