I'm working on a map editor for a simple map builder.
My idea was to paint walls in the map as black pixels, everything else (white colour) is free space in a room.
Any .jar to read bmp files ? So as to avoid the header, etc?
update
Im reading about Image4j
Thanks in adavance.
If you want to use Image4j, that's a pretty easy way to go. This code will display a bmp in a JLabel.
BufferedImage image = null;
try
{
image = BMPDecoder.read(new File("C:\\test.bmp"));
}
catch(IOException ex)
{
Logger.getLogger(DesktopApplication1View.class.getName()).log(Level.SEVERE, null, ex);
}
jLabel1.setIcon(new ImageIcon(image));
I'd recommend you also look at the Java Advanced Imaging API Image I/O sub-project. The project Javadoc indicates that there is support (mostly in raster mode) for BMP files.
import javax.imageio.ImageIO;
class ListImageReaders {
public static void main(String[] args) {
String[] imageReaders = ImageIO.getReaderFileSuffixes();
for (String imageReader : imageReaders) {
System.out.println(imageReader);
}
}
}
Gives output (under Java 1.6)
bmp
jpg
wbmp
jpeg
png
gif
Press any key to continue . . .
Related
I am developing an application that chooses an image of a wound and displays it on the application screen. with this, the user marks the region of interest of the wound, so that later the algorithm can recognize and process the region of interest. I'm doing this using the lib implementation 'com.github.gcacace: signature-pad: 1.2.1' to demarcate the region and then I'm saving the screen's "printscreen" so I can save the markup along with the image of the wound.
How I wish the image will look
Exit:
However, I want to cut the printscreen according to the image of the wound to send to the server to process the image. Can someone help me cut out the wound image after marking.
private fun saveImage(myBitmap: Bitmap?): String? {
try {
// image naming and path to include sd card appending name you choose for file
val mPath = Environment.getExternalStorageDirectory().toString() + "/imagesignature.jpg"
// create bitmap screen capture
val v1 = window.decorView.rootView
v1.isDrawingCacheEnabled = true
val bitmap = Bitmap.createBitmap(v1.drawingCache)
v1.isDrawingCacheEnabled = false
val imageFile = File(mPath)
val outputStream = FileOutputStream(imageFile)
val quality = 100
bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream)
outputStream.flush()
outputStream.close()
//setting screenshot in imageview
val filePath = imageFile.path
val ssbitmap = BitmapFactory.decodeFile(imageFile.absolutePath)
imagem.setImageBitmap(ssbitmap)
} catch (e: Throwable) {
// Several error may come out with file handling or DOM
e.printStackTrace()
}
return ""
}
I am still a learner so for an easy way to crop an image I would suggest using this library:
https://github.com/ArthurHub/Android-Image-Cropper
This is where you can crop the image as per your requirement and store the image on the server
If you have the coordinates of the rectangle you want to save:
Bitmap croppedBmp = Bitmap.createBitmap(originalBmp, rectanglePositionX, rectanglePositionY, rectangleWidth, rectangleHeight);
Or you can try:
BitmapFactory.decodeStream(InputStream is, Rect outPadding, Options opts)
or
BitmapFactory.decodeFileDescriptor(FileDescriptor fd, Rect outPadding, Options opts)
where in the Rect outPadding you will set the coordinates of the rectangle you want to save.
As far as I know, I don't think it's possible to crop and image. In order to crop, you need to find the dimensions for the part that you want. I don't think you can tell the program the dimensions of what you want and then crop everything else off, as far as my knowledge goes. It might be possible to print an image, but I don't think Java can crop. Other coding programs might work better for this.
I need to add an image to my docx file. The image is a png image of a signature that is to placed behind text in the signature line of a certificate to be downloaded by the user as a docx, a pdf or jpg. The first problem I encountered is that you can only add inline image using the latest version of docx4j (v6.1.2) and creating an image Anchor is currently disabled (see BinaryPartAbstractImage.java: line 1029). That's a problem since the signature image is not inline, it supposed to appear behind the name on the signature line. Instead of inserting one myself, my workaround is to place a placeholder image:
These images are mapped as image1.png and image2.png, respectively, on /word/media directory of the docx uncompressed version. The program then replaces these with the name, position, and actual png of the signature every time a certificate is generated.
The problem is that the images are scaled the same dimension as the placeholder image, where in fact it should look like this:
How can I get to keep the image dimension of the image after replacing, or at least the aspect ratio? Here is how I replace the placeholder image with the new image:
File approveBySignatureImage = new File(...);
final String approvedByImageNodeId = "rId5";
replaceImageById(approvedByImageNodeId,
"image1.png", approveBySignatureImage);
This is the actual method where the replacing happens:
public void replaceImageById(String id, String placeholderImageName, File newImage) throws Exception {
Relationship rel = document.getMainDocumentPart().getRelationshipsPart().getRelationshipByID(id);
BinaryPartAbstractImage imagePart;
if(FilenameUtils.getExtension(placeholderImageName).toLowerCase() == ContentTypes.EXTENSION_BMP) {
imagePart = new ImageBmpPart(new PartName("/word/media/" + placeholderImageName));
}
else if([ContentTypes.EXTENSION_JPG_1, ContentTypes.EXTENSION_JPG_2].contains(FilenameUtils.getExtension(placeholderImageName).toLowerCase())) {
imagePart = new ImageJpegPart(new PartName("/word/media/" + placeholderImageName));
}
else if(FilenameUtils.getExtension(placeholderImageName).toLowerCase() == ContentTypes.EXTENSION_PNG) {
imagePart = new ImagePngPart(new PartName("/word/media/" + placeholderImageName));
}
InputStream stream = new FileInputStream(newImage);
imagePart.setBinaryData(stream);
if(FilenameUtils.getExtension(newImage.getName()).toLowerCase() == ContentTypes.EXTENSION_BMP) {
imagePart.setContentType(new ContentType(ContentTypes.IMAGE_BMP));
}
else if([ContentTypes.EXTENSION_JPG_1, ContentTypes.EXTENSION_JPG_2].contains(FilenameUtils.getExtension(newImage.getName()).toLowerCase())) {
imagePart.setContentType(new ContentType(ContentTypes.IMAGE_JPEG));
}
else if(FilenameUtils.getExtension(newImage.getName()).toLowerCase() == ContentTypes.EXTENSION_PNG) {
imagePart.setContentType(new ContentType(ContentTypes.IMAGE_PNG));
}
imagePart.setRelationshipType(Namespaces.IMAGE);
final String embedId = rel.getId();
rel = document.getMainDocumentPart().addTargetPart(imagePart);
rel.setId(embedId);
}
You'll need to set the dimensions (or possibly just remove what you have?) on your placeholder image.
For help in doing that:-
docx4j inspects the image to work that out at https://github.com/plutext/docx4j/blob/master/src/main/java/org/docx4j/openpackaging/parts/WordprocessingML/BinaryPartAbstractImage.java#L512 using org.apache.xmlgraphics ImageInfo.
See also CxCy:https://github.com/plutext/docx4j/blob/master/src/main/java/org/docx4j/openpackaging/parts/WordprocessingML/BinaryPartAbstractImage.java#L1164
https://github.com/plutext/docx4j/blob/master/src/main/java/org/docx4j/openpackaging/parts/WordprocessingML/BinaryPartAbstractImage.java#L815 shows scaling to maintain aspect ratio.
I am very new to Tess4J so my knowledge is somewhat limited. I am currently using Tess4j to do OCR on an image that has already had a threshold applied to it using OpenCV. I'm using OTSU to threshold the image, and cropping out most noise, but Tesseract doesn't seem to be able to read the numbers at all. I've read that the size can alter recognition but even when I scale the image it doesn't seem to work. Is there more I need to do to the Image or use a different .traindata to do OCR?
This is my code for Tess4J's OCR.
public static void main(String[] args) {
File imageFile = new File("newim.TIFF");
Tesseract instance = new Tesseract(); // JNA Interface Mapping
instance.setDatapath("workspace/Tess4J/tessdata");
instance.setLanguage("Interstate");
try {
String result = instance.doOCR(imageFile);
System.out.println(result);
} catch (TesseractException e) {
System.err.println(e.getMessage());
}
}
Image I'm trying to do OCR on
Result: "EEEH"
I have been dealing with very small images and I have tried to discover the best way to increase them. I compared two different sources: imagecopyresampled (PHP: http://www.php.net/manual/en/function.imagecopyresampled.php) versus Scalr (JAVA: How to resize images in a directory?). I am including the codes that I am using below for the sake of completeness, but they are strongly based on other threads or sites referenced above. If someone thinks that I should remove, I will do that! In both sources it seems that the algorithm used to deal with the issue seems to be the same: Bicubic interpolation. However, in the case of the JAVA source, the quality of the resized image is MUCH MUCH better in my implementation (it is not even possible to compare). Am I doing something wrong when I am using the PHP source? If not, does anyone can explain me the difference between them?
JavaCode:
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import static org.imgscalr.Scalr.*;
public class App2 {
public static void main(String[] args) throws IOException {
for (File sourceImageFile : new File("imgs").listFiles()) {
if (sourceImageFile.getName().endsWith(".jpg"))
res(sourceImageFile.getAbsolutePath());
}
}
public static void res(String arg) throws IOException {
File sourceImageFile = new File(arg);
BufferedImage img = ImageIO.read(sourceImageFile);
BufferedImage thumbnail = resize(img, 500);
thumbnail.createGraphics().drawImage(thumbnail, 0, 0, null);
ImageIO.write(thumbnail, "jpg", new File("resized/" + sourceImageFile.getName()));
}
}
PHP code:
<?php
// The file
$filename = 'photos/thePhoto.jpg';
// Set a maximum height and width
$width = 250;
$height = 250;
// Content type
header('Content-Type: image/jpeg');
// Get new dimensions
list($width_orig, $height_orig) = getimagesize($filename);
$ratio_orig = $width_orig/$height_orig;
if ($width/$height > $ratio_orig) {
$width = $height*$ratio_orig;
} else {
$height = $width/$ratio_orig;
}
// Resample
$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);
// Output
imagejpeg($image_p, null, 100);
?>
Just to be clear, in the JAVA code, I have to keep the images in a folder. In the PHP code, I provide the name of the file. Off course, I compared exactly the same image. Furthermore, both codes are running without any kind of problem.
![PHP versus Java (in this order)]: http://www.facebook.com/media/set/?set=a.122440714606196.1073741825.100005208033163&type=1&l=55d93c4969
i have an application that loads an image to create a button with an icon in it. When started from the IDE, it works just fine, but when started from an exported jar file, it gives an image fetching error.
Location of images :
+Project
-Source Packages
-Tools
-start.jpg
The code used :
static final String STARTIMAGE = "/Tools/start.JPG";
public static JButton createStartButton() {
Image img = Toolkit.getDefaultToolkit().getImage(GUITools.class.getResource(STARTIMAGE));
JButton b = new JButton("",new ImageIcon(img));
b.setPreferredSize(smallButton);
b.setMaximumSize(smallButton);
b.setMinimumSize(smallButton);
return b;
Now, the weirdest thing is that in another screen, a button is created in the exact same way, and this one works just fine...
Code:
static final String PREVIOUSIMAGE = "/Tools/previous.gif";
public JButton createPreviousButton(){
Image img = Toolkit.getDefaultToolkit().getImage(getClass().getResource(PREVIOUSIMAGE));
JButton b = new JButton("Previous",new ImageIcon(img));
b.setPreferredSize(dimensionButton);
b.setMaximumSize(dimensionButton);
b.setMinimumSize(dimensionButton);
return b;
}
The only difference is that one is static, but even if make it non-static like the other one, it still won't work.
I tried everything I found on this forum and other sites, including this good topic :
How to bundle images in jar file
(The generated url at the end of the topic is just 'null')
Nothing seems to work... Please help!
Thanks!
When started from the IDE, it works just fine, but when started from an exported jar file, it gives an image fetching error.
Image img = Toolkit.getDefaultToolkit().getImage(getClass().getResource(PREVIOUSIMAGE));
This approach above is incorrect, use this instead:
private static BufferedImage readBufferedImage (String imagePath) {
try {
InputStream is = YourClassName.class.getClassLoader().getResourceAsStream(imagePath);
BufferedImage bimage = ImageIO.read(is);
is.close();
return bimage;
} catch (Exception e) {
return null;
}
}
And better load all images at application startup and then use them.
It seems to me that your images are inside a package so the actual link might be "package.name/Tools/start.jpg" or something else when its compiled so the image should be moved.
Instead of having it inside of a package like:
+Project
-Source Packages
-Tools
-start.jpg
Do something like this instead.
+Project Folder
-Source Packages/
-Tools/
-start.jpg