I have many dicom (dcm) images that I want to display as thumbnails in my program. I can load it and draw in a separate window with ImageJ plugin:
try {
FileInputStream fis = new FileInputStream(dcms);
DICOM d = new DICOM(fis);
d.run(dcms);
d.setTitle(title);
d.show();
d.draw();
} catch (Exception e) {e.printStackTrace();}
}
But I want to be able to load it as a Image in a JavaFX button (as thumbnails) as I can do with pngs:
try{
Image picture = new Image(getClass().getResourceAsStream(dcms));
bt.setGraphic(new ImageView(picture));
}
I couldn't find any similar example on Google (most of the results lead to programs to convert the dicom to another thing through a program). But I don't want to convert and then display, I just want to display it.
Do you know if it's possible? Or will I have to convert it before loading the thumbnails?
EDIT : I know that I can save each picture somewhere e.g temp folder and then load it as a Image, but I still think that it's a unnecessary workaround. And I would like to avoid it if possible.
I found a way to use it:
FileInputStream fis;
try {
fis = new FileInputStream(path);
DICOM d = new DICOM(fis);
d.run(path);
Image picture = SwingFXUtils.toFXImage(d.getBufferedImage(), null);
Button bt = new Button();
bt.setGraphic(new ImageView(picture));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Posted because it might be useful for someone else.
Related
I need to download vector images from server and display them in ImageViews. I succesfully downloaded the images to external storage, but now I'm having a problem displaying them.
I'm using a SVG library from larvalabs and here's the code:
File image = new File(Environment.getExternalStorageDirectory(), "image.svg");
if (image.exists()) {
try {
InputStream imageStream = new FileInputStream(image);
SVGBuilder builder = new SVGBuilder();
builder.readFromInputStream(imageStream);
SVG svg = builder.build();
Drawable draw = svg.getDrawable();
((ImageButton) view).setImageDrawable(draw);
imageStream.close();
} catch (Exception e) {...
It turns out that the InputStream is empty. But the file is there, the path shows to the correct directory, the file is as it should be, so I don't know what else could be the problem. I'm adding a print screen from debugger if it helps.
Debugger Print Screen
What I want to do is read an image from FileChooser and write it to file. I had to store the image in a javafx.scene.image.Image so that I can display it and clip it inside a circle. I have a little problem with trying to write the image that I got from javafx.scene.image.Image to file. The conversion process is not fluid, converts from CMYK to RGB (therefore turning my picture to some pink thing.
Please, I have checked a lot of other sources, and no one has been able to give me a notable solution
FileChooser fileChooser = new FileChooser();
File selectedFile = fileChooser.showOpenDialog(parent);
// get Image from selectedFile
Image userImg = = new Image( selectedFile.toURI().toURL().toString() );
if ( userImg != null ) {
String format = "jpg";
String filename = "d:\\pictureName."+ format;
File file = new File(filename);
// convert Image to BufferedImage
BufferedImage bufferedImage = SwingFXUtils.fromFXImage( userImg, null);
try {
// this is where i want to convert the color mode
// from cmyk to rgb, before i write it to file
ImageIO.write( bufferedImage, format, file );
} catch (IOException e) {
System.out.println("Exception :: "+ e.getMessage() );
}
}
Why do you think that there is some CMYK to RGB conversion happening? I suspect the reason for your "pink thing" is something different. The easiest way to find out is to change your output format from jpeg to png and see whether it makes a difference.
I think you are again one of the many people who are hit by this bug https://bugs.openjdk.java.net/browse/JDK-8119048 which is not considered important enough to be fixed. If you read the comments in there you will find a work-arround. Basically the idea is to copy the image after the conversion into a new image without alpha channel.
I'd really like to know how many more people have to waste their time until this bug finally gets enough attention to be fixed.
i have a code to decode a qrcode that take a image file and decode it. am using zxing library. but how can i make this capture qrcode from webcam and decode it. what are the changes i need to do?? can any one plz explain this step by step.
here is the code:
public class QrCodeDecoder
{
public String decode(File imageFile)
{
BufferedImage image;
try
{
image = ImageIO.read(imageFile);
}
catch (IOException e1)
{
return "io outch";
}
// creating luminance source
LuminanceSource lumSource = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(lumSource));
// barcode decoding
QRCodeReader reader = new QRCodeReader();
Result result = null;
try {
result = reader.decode(bitmap);
}
catch (ReaderException e)
{
return "reader error";
}
return result.getText();
}
}
You are pretty far away from a solution, I don't think anyone can explain it "step by step". You will first need to find a library that is capable of grabbing an image from a webcam. You might start with this library, though I'm sure there are others.
Once you can capture an image, start to figure out if it is in a format that the above code expects. If you are lucky, it will be, if not you will have to convert between the two formats.
I've been searching for some solutions from the internet yet I still haven't found an answer to my problem.
I've been working or doing a program that would get an image file from my PC then will be edited using Java Graphics to add some text/object/etc. After that, Java ImageIO will save the newly modified image.
So far, I was able to do it nicely but I got a problem about the size of the image. The original image and the modified image didn't have the same size.
The original is a 2x3inches-image while the modified one which supposedly have 2x3inches too sadly got 8x14inches. So, it has gone BIGGER than the original one.
What is the solution/code that would give me an output of 2x3inches-image which will still have a 'nice quality'?
UPDATE:
So, here's the code I used.
public Picture(String filename) {
try {
File file = new File("originalpic.jpg");
image = ImageIO.read(file);
width = image.getWidth();
}
catch (IOException e) {
throw new RuntimeException("Could not open file: " + filename);
}
}
private void write(int id) {
try {
ImageIO.write(image, "jpg", new File("newpic.jpg"));
} catch (IOException e) {
e.printStackTrace();
}
}
2nd UPDATE:
I now know what's the problem of the new image. As I check it from Photoshop, It has a different image resolution compared to the original one. The original has a 300 pixels/inch while the new image has a 72 pixels/inch resolution.
How will I be able to change the resolution using Java?
I am resizing many jpeg images using Apache Sanselan which also deals with CMYK colors.
I have a problem when trying to convert jpeg images that has an alpha channel... when doing it the result is an image with different colors, and i guess that java somehow handles these type of images as a different color format.
As i said, the RGB resizing works fine as well as CMYK. ARGB images turn out with different colors.
An example:
Any suggestions? Can i force somehow ignore the alpha channel and handle the image as an RGB image? or convert it to be an RGB image without losing the real colors?
The code that handles this image is:
ImageInputStream stream = ImageIO.createImageInputStream(file);
Iterator<ImageReader> iter = ImageIO.getImageReaders(stream);
while (iter.hasNext()) {
ImageReader reader = iter.next();
reader.setInput(stream);
BufferedImage image = null;
ICC_Profile profile = null;
try {
image = reader.read(0);
} catch (IIOException e) {
... (CMYK conversion if needed)
}
return image;
}
return null;
Thanks in advance
I found a good solution here (first solution worked great):
problem using ImageIO.write jpg file
Edit:
There is a new open source library which supports CMYK processing.
All you need to do is to add the dependency to your project and a new reader will be added to the list of readers (while the known JPEGImageReader can't deal with CMYK).
You will probably want to iterate over these readers and read the image using the first reader which doesn't throw exception.
This package is a release candidate, but i am using it and it solved a huge problem that we had hard time dealing with.
http://mvnrepository.com/artifact/com.twelvemonkeys.imageio/imageio-jpeg/3.0-rc5
You can do the iteration this way to get the BufferedImage, and after you got that, the rest is easy (you can use any existing image converting package to save it as another format):
try (ImageInputStream input = ImageIO.createImageInputStream(source)) {
// Find potential readers
Iterator<ImageReader> readers = ImageIO.getImageReaders(input);
// For each reader: try to read
while (readers != null && readers.hasNext()) {
ImageReader reader = readers.next();
try {
reader.setInput(input);
BufferedImage image = reader.read(0);
return image;
} catch (IIOException e) {
// Try next reader, ignore.
} catch (Exception e) {
// Unexpected exception. do not continue
throw e;
} finally {
// Close reader resources
reader.dispose();
}
}
// Couldn't resize with any of the readers
throw new IIOException("Unable to resize image");
}