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BufferedImageOp Kernel Convolution not doing anything

I am attempting to perform a basic kernel convolution pass on an image using the BufferedImageOp package in java.awt.image. This is the code I have:
BufferedImage img = null;
File f = null;
//read image
try {
f = new File("keys.JPG");
img = ImageIO.read(f);
} catch (IOException e) {
System.out.println(e);
}
float[] gaussian = {
1/16f, 1/8f, 1/16f,
1/8f, 1/4f, 1/8f,
1/16f, 1/8f, 1/16f,
};
BufferedImageOp op = new ConvolveOp(new Kernel(3, 3, gaussian));
BufferedImage dest = op.filter(img, null);
File outputfile = new File("image.jpg");
ImageIO.write(dest, "jpg", outputfile);
My code attempts to load the image keys.JPG and then convolve this image with the Gaussian blur kernel and save the image to the file image.jpg. When I run the code, it processes for a bit then terminates and saves the image successfully but when I compare the original and the new images, they are identical.
Looking online at some code examples, my code should work. Am I missing something?
Thanks

As #haraldK mentioned, my image was too large to notice a difference. The code works as expected.

ArrayOutOfBoundsException while reading Image from Disk

At the moment I'm trying to print some pdfs in java. The API used is Apache PDF Box in Version 2.0. After converting the images I write them to disk to save memory. In the next step I read them again and write the title in the head of the image. After that I write them again. To use them I read them again separately. When I read them for the last time I get the following exception every 200-300 images:
java.lang.IndexOutOfBoundsException: off < 0 || len < 0 || off+len > b.length || off+len < 0!
at javax.imageio.stream.MemoryCacheImageInputStream.read(MemoryCacheImageInputStream.java:100)
at com.sun.imageio.plugins.common.SubImageInputStream.read(SubImageInputStream.java:61)
at com.sun.imageio.plugins.common.InputStreamAdapter.read(InputStreamAdapter.java:47)
at java.io.SequenceInputStream.read(SequenceInputStream.java:207)
at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:238)
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
at java.io.FilterInputStream.read(FilterInputStream.java:83)
at com.sun.imageio.plugins.png.PNGImageReader.decodePass(PNGImageReader.java:1104)
at com.sun.imageio.plugins.png.PNGImageReader.decodeImage(PNGImageReader.java:1215)
at com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1330)
at com.sun.imageio.plugins.png.PNGImageReader.read(PNGImageReader.java:1606)
at javax.imageio.ImageIO.read(ImageIO.java:1448)
at javax.imageio.ImageIO.read(ImageIO.java:1400)
at my.code.Class.method()
I use the following code to convert the PDFs:
final HashMap<Integer, File> images = new HashMap<>();
PDDocument document = PDDocument.load(sourceFile);
PDFRenderer pdfRenderer = new PDFRenderer(document);
final ExecutorService service = Executors.newFixedThreadPool(4);
for (int page = 0; page < document.getNumberOfPages(); ++page)
{
final int finalPageNumber = page;
Runnable r = () -> {
try
{
//Java could only print with 72 dpi so I'll use it
BufferedImage image = pdfRenderer.renderImageWithDPI(finalPageNumber, 72);
File imageFile = new File(sourceFile.getAbsolutePath() + "-" + (finalPageNumber + 1) + ".png");
ImageIO.write(image, "png", imageFile);
image.flush();
images.put(finalPageNumber, imageFile);
}
catch (final IOException e)
{
e.printStackTrace();
}
};
Thread t = new Thread(r, page + "");
t.setName("" + page);
service.submit(t);
}
And for reading is the following code used:
// example url: /tmp/example.pdf-17.png
Image i = ImageIO.read(url);
What about to solve this problem
edit
What I've forgotten to say I add a Title manually to the Image:
BufferedImage bimage = new BufferedImage( simple.getValue().getWidth(null),
simple.getValue().getHeight(null) + 50,
BufferedImage.TYPE_INT_ARGB);
Graphics bGr = bimage.createGraphics();
bGr.setColor(Color.WHITE);
bGr.fillRect(0, 0, bimage.getWidth(), bimage.getHeight());
bGr.setFont(new Font("Arial", Font.PLAIN, 15));
bGr.setColor(Color.BLACK);
bGr.drawImage(simple.getValue(), 0, 50, null);
bGr.drawString(entry.getValue(), 20, 20);
try
{
ImageIO.write(bimage, "PNG", new File(simple.getKey().toURI()));
}
catch (IOException | URISyntaxException e)
{
e.printStackTrace();
}
bGr.dispose();
And here are the links to the files (It could occur with every page):
Image which throws the exception
PDF file which is used (generated by Word2007)

I have solved my Problem. I hadn't wait for the writing of the Image. Now I wait for the finish of the ExecutorService and everything works fine.
I think there was a problem to free resources, since I've seen that at MemoryCacheImageInputStream line 100 every thing was fine when the exception was thrown.

leaking image processing code in java

I have the code below on a tomcat server. The goal is to save in .jpg an image (that is sent in String) and create the equivalent thumbnails.
The goal is properly achieved nevertheless I noticed that at every execution (even after trying to set almost all used variables "null"), the server memomy increases by 6 Megabytes which are never freed. Since I have a very small RAM's server, this is really problematic. By the way images sent are close to 30 kilobytes only.
public boolean saveImage(String picInString)
throws IOException {
byte[] bytes = null;
try {
bytes = Base64.decode(picInString);
} catch (Base64DecodingException e) {
e.printStackTrace(System.out);
}
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
Iterator<?> readers = ImageIO.getImageReadersByFormatName("png");
ImageReader reader = (ImageReader) readers.next();
Object source = bis;
ImageInputStream iis = ImageIO.createImageInputStream(source);
Graphics2D g2 = null;
try {
reader.setInput(iis, true);
ImageReadParam param = reader.getDefaultReadParam();
Image image = reader.read(0, param);
// got an image file
BufferedImage bufferedImage = new BufferedImage(image.getWidth(null),
image.getHeight(null), BufferedImage.TYPE_INT_RGB);
// bufferedImage is the RenderedImage to be written
g2 = bufferedImage.createGraphics();
g2.drawImage(image, null, null);
ImageIO.write(bufferedImage, "jpg", new File("/image.jpg"));
ImageIO.write(Scalr.resize(MyImageClass.cropImage(bufferedImage), 100, 100),
"jpg", new File("/image_mini.jpg"));
bufferedImage.flush();
bufferedImage = null;
} catch (Exception e) {
e.printStackTrace(System.out);
} finally {
if (reader != null) {
reader.dispose();
}
if (g2 != null) {
g2.dispose();
}
bis.close();
iis.close();
reader = null;
bis = null;
iis = null;
}
return false;
}
Any help will be appreciated!

Someone gave me a clue to the answer but I am not able to see the comment anymore.
Actually, setting the variable "image" to null at the end of the process has solved the issue.

You shouldn't tame an image as it is. You should down sample it like it is done in android. Scaling is a must to prevent memory errors and exceptions. This SO questions is the solution to all your problems.
How to improve the performance of g.drawImage() method for resizing images

How do you access an attachment stored as MIME Part?

It seems to me there are two ways to store an attachment in a NotesDocument.
Either as a RichTextField or as a "MIME Part".
If they are stored as RichText you can do stuff like:
document.getAttachment(fileName)
That does not seem to work for an attachment stored as a MIME Part. See screenshot
I have thousands of documents like this in the backend. This is NOT a UI issue where I need to use the file Download control of XPages.
Each document as only 1 attachment. An Image. A JPG file. I have 3 databases for different sizes. Original, Large, and Small. Originally I created everything from documents that had the attachment stored as RichText. But my code saved them as MIME Part. that's just what it did. Not really my intent.
What happened is I lost some of my "Small" pictures so I need to rebuild them from the Original pictures that are now stored as MIME Part. So my ultimate goal is to get it from the NotesDocument into a Java Buffered Image.
I think I have the code to do what I want but I just "simply" can't figure out how to get the attachment off the document and then into a Java Buffered Image.
Below is some rough code I'm working with. My goal is to pass in the document with the original picture. I already have the fileName because I stored that out in metaData. But I don't know how to get that from the document itself. And I'm passing in "Small" to create the Small image.
I think I just don't know how to work with attachments stored in this manner.
Any ideas/advice would be appreciated! Thanks!!!
public Document processImage(Document inputDoc, String fileName, String size) throws IOException {
// fileName is the name of the attachment on the document
// The goal is to return a NEW BLANK document with the image on it
// The Calling code can then deal with keys and meta data.
// size is "Original", "Large" or "Small"
System.out.println("Processing Image, Size = " + size);
//System.out.println("Filename = " + fileName);
boolean result = false;
Session session = Factory.getSession();
Database db = session.getCurrentDatabase();
session.setConvertMime(true);
BufferedImage img;
BufferedImage convertedImage = null; // the output image
EmbeddedObject image = null;
InputStream imageStream = null;
int currentSize = 0;
int newWidth = 0;
String currentName = "";
try {
// Get the Embedded Object
image = inputDoc.getAttachment(fileName);
System.out.println("Input Form : " + inputDoc.getItemValueString("form"));
if (null == image) {
System.out.println("ALERT - IMAGE IS NULL");
}
currentSize = image.getFileSize();
currentName = image.getName();
// Get a Stream of the Imahe
imageStream = image.getInputStream();
img = ImageIO.read(imageStream); // this is the buffered image we'll work with
imageStream.close();
Document newDoc = db.createDocument();
// Remember this is a BLANK document. The calling code needs to set the form
if ("original".equalsIgnoreCase(size)) {
this.attachImage(newDoc, img, fileName, "JPG");
return newDoc;
}
if ("Large".equalsIgnoreCase(size)) {
// Now we need to convert the LARGE image
// We're assuming FIXED HEIGHT of 600px
newWidth = this.getNewWidth(img.getHeight(), img.getWidth(), 600);
convertedImage = this.getScaledInstance(img, newWidth, 600, false);
this.attachImage(newDoc, img, fileName, "JPG");
return newDoc;
}
if ("Small".equalsIgnoreCase(size)) {
System.out.println("converting Small");
newWidth = this.getNewWidth(img.getHeight(), img.getWidth(), 240);
convertedImage = this.getScaledInstance(img, newWidth, 240, false);
this.attachImage(newDoc, img, fileName, "JPG");
System.out.println("End Converting Small");
return newDoc;
}
return newDoc;
} catch (Exception e) {
// HANDLE EXCEPTION HERE
// SAMLPLE WRITE TO LOG.NSF
System.out.println("****************");
System.out.println("EXCEPTION IN processImage()");
System.out.println("****************");
System.out.println("picName: " + fileName);
e.printStackTrace();
return null;
} finally {
if (null != imageStream) {
imageStream.close();
}
if (null != image) {
LibraryUtils.incinerate(image);
}
}
}

I believe it will be some variation of the following code snippet. You might have to change which mimeentity has the content so it might be in the parent or another child depending.
Stream stream = session.createStream();
doc.getMIMEEntity().getFirstChildEntity().getContentAsBytes(stream);
ByteArrayInputStream bais = new ByteArrayInputStream(stream.read());
return ImageIO.read(bais);
EDIT:
session.setConvertMime(false);
Stream stream = session.createStream();
Item itm = doc.getFirstItem("ParentEntity");
MIMEEntity me = itm.getMIMEEntity();
MIMEEntity childEntity = me.getFirstChildEntity();
childEntity.getContentAsBytes(stream);
ByteArrayOutputStream bo = new ByteArrayOutputStream();
stream.getContents(bo);
byte[] mybytearray = bo.toByteArray();
ByteArrayInputStream bais = new ByteArrayInputStream(mybytearray);
return ImageIO.read(bais);

David have a look at DominoDocument,http://public.dhe.ibm.com/software/dw/lotus/Domino-Designer/JavaDocs/XPagesExtAPI/8.5.2/com/ibm/xsp/model/domino/wrapped/DominoDocument.html
There you can wrap every Notes document
In the DominoDocument, there such as DominoDocument.AttachmentValueHolder where you can access the attachments.
I have explained it at Engage. It very powerful
http://www.slideshare.net/flinden68/engage-use-notes-objects-in-memory-and-other-useful-java-tips-for-x-pages-development

ANDROID: Saving PreviewCallback image as a .jpg from a byte array results in a corrupt file

I have been augmenting the QR scanning library Zxing to save a photo instantly upon scan. I was advised to do so within the onPreviewFrame method within PreviewCallback.java as thus:
public void onPreviewFrame(byte[] data, Camera camera) {
Point cameraResolution = configManager.getCameraResolution();
Handler thePreviewHandler = previewHandler;
YuvImage im = new YuvImage(data, ImageFormat.NV21, 1200,
800, null);
Rect r = new Rect(0, 0, 1200, 800);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
im.compressToJpeg(r, 50, baos);
try {
FileOutputStream output = new FileOutputStream("/sdcard/test_jpg.jpg");
output.write(baos.toByteArray());
output.flush();
output.close();
System.out.println("Attempting to save file");
System.out.println(data);
} catch (FileNotFoundException e) {
System.out.println("Saving to file failed");
} catch (IOException e) {
System.out.println("Saving to file failed");
}
if (cameraResolution != null && thePreviewHandler != null) {
Message message = thePreviewHandler.obtainMessage(previewMessage, cameraResolution.x,
cameraResolution.y, data);
message.sendToTarget();
previewHandler = null;
} else {
Log.d(TAG, "Got preview callback, but no handler or resolution available");
}}
The result of running this code is a corrupt image at the set file directory. I believe this is due to the code being run every frame. Is there a way to limit this to every second or so if that will allow the full image to save, or is there a method I can use to cause the image to only save upon completed scan.
I have a less favourable working alternative, in that I can successfully save the black and white image that is shown upon scan; colour is the preferable option of course.
Update: Code changed to (in theory) accommodate camera resolution on any device. Image is still corrupt.
public void onPreviewFrame(byte[] data, Camera camera) {
Point cameraResolution = configManager.getCameraResolution();
Handler thePreviewHandler = previewHandler;
android.hardware.Camera.Parameters parameters = camera.getParameters();
android.hardware.Camera.Size size = parameters.getPictureSize();
int height = size.height;
int width = size.width;
YuvImage im = new YuvImage(data, ImageFormat.NV21, width,
height, null);
Rect r = new Rect(0, 0, width, height);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
im.compressToJpeg(r, 50, baos);
try {
FileOutputStream output = new FileOutputStream("/sdcard/test_jpg.jpg");
output.write(baos.toByteArray());
output.flush();
output.close();
System.out.println("Attempting to save file");
System.out.println(data);
} catch (FileNotFoundException e) {
System.out.println("Saving to file failed");
} catch (IOException e) {
System.out.println("Saving to file failed");
}
if (cameraResolution != null && thePreviewHandler != null) {
Message message = thePreviewHandler.obtainMessage(previewMessage, cameraResolution.x,
cameraResolution.y, data);
message.sendToTarget();
previewHandler = null;
} else {
Log.d(TAG, "Got preview callback, but no handler or resolution available");
}}
Having checked the width and height variable are correctly set to the Nexus 7's camera width and height of 1280x960. I am confident the issue comes from attempting to save the image every frame, as "Attempting to save to file" appears somewhat rapidly within the logcat; several times a second. It may also be worth noting that the corrupt image saved is square(ish).
Thanks in advance.

1200 x 800? are you sure this is your preview size? check your parameters. Probably it's 1280 x 720