I have images of codes that I want to decode. How can I use zxing so that I specify the image location and get the decoded text back, and in case the decoding fails (it will for some images, that's the project), it gives me an error.
How can I setup zxing on my Windows machine? I downloaded the jar file, but I don't know where to start. I understand I'll have to create a code to read the image and supply it to the library reader method, but a guide how to do that would be very helpful.
I was able to do it. Downloaded the source and added the following code. Bit rustic, but gets the work done.
import com.google.zxing.NotFoundException;
import com.google.zxing.ChecksumException;
import com.google.zxing.FormatException;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.Reader;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.Result;
import com.google.zxing.LuminanceSource;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import java.io.File;
import java.io.IOException;
import java.util.*;
import com.google.zxing.qrcode.QRCodeReader;
class qr
{
public static void main(String args[])
{
Reader xReader = new QRCodeReader();
BufferedImage dest = null;
try
{
dest = ImageIO.read(new File(args[0]));
}
catch(IOException e)
{
System.out.println("Cannot load input image");
}
LuminanceSource source = new BufferedImageLuminanceSource(dest);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Vector<BarcodeFormat> barcodeFormats = new Vector<BarcodeFormat>();
barcodeFormats.add(BarcodeFormat.QR_CODE);
HashMap<DecodeHintType, Object> decodeHints = new HashMap<DecodeHintType, Object>(3);
decodeHints.put(DecodeHintType.POSSIBLE_FORMATS, barcodeFormats);
decodeHints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
Result result = null;
try
{
result = xReader.decode(bitmap, decodeHints);
System.out.println("Code Decoded");
String text = result.getText();
System.out.println(text);
}
catch(NotFoundException e)
{
System.out.println("Decoding Failed");
}
catch(ChecksumException e)
{
System.out.println("Checksum error");
}
catch(FormatException e)
{
System.out.println("Wrong format");
}
}
}
The project includes a class called CommandLineRunner which you can simply call from the command line. You can also look at its source to see how it works and reuse it.
There is nothing to install or set up. It's a library. Typically you don't download the jar but declare it as a dependency in your Maven-based project.
If you just want to send an image to decode, use http://zxing.org/w/decode.jspx
Related
I am trying to convert the image to a searchable pdf using tesseract. The below command line option working fine for me.
Exploring a similar option in java. But not sure what to pass in the arguments. Below is my java code
import java.io.File;
import java.util.Arrays;
import java.util.List;
import net.sf.saxon.expr.instruct.ValueOf;
import net.sourceforge.tess4j.Tesseract;
import net.sourceforge.tess4j.TesseractException;
public class Mask2 {
public static void main(String[] args) {
File image = new File("D:\\ML\\Java\\img3.PNG");
Tesseract tesseract = new Tesseract();
tesseract.setDatapath("C://Program Files//Tesseract-OCR//tessdata");
tesseract.setLanguage("eng");
tesseract.setPageSegMode(1);
tesseract.setOcrEngineMode(1);
try {
// Not sure what to pass in arguments
tesseract.createDocumentsWithResults()
} catch (TesseractException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Any Suggestions / Solutions would be much helpful.
you can create a list of renderFormats like this ( you can add others)
List<RenderedFormat> renderFormats = new ArrayList<RenderedFormat>();
renderFormats.add(RenderedFormat.PDF);
and then you can pass the path of the input filename (PDF or IMG), the path of the output filename with no extension, and the render format you want to use.
tesseract.createDocuments("a/b/c/inputfile.PNG", "a/b/c/outputfile", renderFormats);
Ciao!
Recently I have got involved into Storlet project which is a middleware of OpenStack Swift Project. I do not intend to talk about Storlet but, in short Storlet running a java code on objects(files) that stored into swift object storage. Files read by the storlet and send to the java application in form of InputSream which means we don't direct access to files.
this is a sample code of a storlet which gets the image as an inputstream and make a thumbnail of it.
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.io.InputStream;
import java.io.OutputStream;
import org.openstack.storlet.common.IStorlet;
import org.openstack.storlet.common.StorletException;
import org.openstack.storlet.common.StorletInputStream;
import org.openstack.storlet.common.StorletLogger;
import org.openstack.storlet.common.StorletObjectOutputStream;
import org.openstack.storlet.common.StorletContainerHandle;
import org.openstack.storlet.common.StorletOutputStream;
import org.openstack.storlet.common.StorletUtils;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.awt.Image;
import java.awt.Transparency;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
public class ThumbnailStorlet implements IStorlet {
#Override
public void invoke(ArrayList<StorletInputStream> inputStreams,
ArrayList<StorletOutputStream> outputStreams,
Map<String, String> parameters, StorletLogger log)
throws StorletException {
log.emitLog("ThumbnailStorlet Invoked");
/*
* Get input stuff
*/
HashMap<String, String> object_md;
StorletInputStream storletInputStream = inputStreams.get(0);
InputStream thumbnailInputStream = storletInputStream.getStream();
object_md = storletInputStream.getMetadata();
/*
* Get output stuff
*/
StorletObjectOutputStream storletObjectOutputStream = (StorletObjectOutputStream)outputStreams.get(0);
OutputStream thumbnailOutputStream = storletObjectOutputStream.getStream();
/*
* Set the output metadata
*/
log.emitLog("Setting metadata");
storletObjectOutputStream.setMetadata(object_md);
/*
* Read Input to BufferedImage
*/
log.emitLog("Reading Input");
BufferedImage img = null;
try {
img = ImageIO.read(thumbnailInputStream);
} catch (Exception e) {
log.emitLog("Failed to read input stream to buffered image");
throw new StorletException("Failed to read input stream to buffered image " + e.getMessage());
} finally {
try {
thumbnailInputStream.close();
} catch (IOException e) {
log.emitLog("Failed to close input stream");
}
}
try {
thumbnailInputStream.close();
} catch (IOException e) {
log.emitLog("Failed to close input stream");
}
/*
* Convert
*/
log.emitLog("Converting");
int newH = img.getHeight()/8;
int newW = img.getWidth()/8;
int type = img.getTransparency() == Transparency.OPAQUE ? BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB;
BufferedImage thumbnailImage = new BufferedImage(newW, newH, type);
Graphics2D g = thumbnailImage.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(img, 0, 0, newW, newH, null);
g.dispose();
/*
* Write
*/
log.emitLog("Writing Output");
try {
ImageIO.write(thumbnailImage, "PNG" , thumbnailOutputStream);
} catch (Exception e) {
log.emitLog("Failed to write image to out stream");
throw new StorletException("Failed to write image to out stream " + e.getMessage());
} finally {
try {
thumbnailOutputStream.close();
} catch (IOException e) {
}
}
try {
thumbnailOutputStream.close();
} catch (IOException e) {
}
log.emitLog("Done");
}
}
Now ..
I want to using some external application which running on images such as GDAL inside my java code ,assume code like the code above(not exactly doing the same as above). GDLA has some cli commands. For example this command
gdal_translate -of JPEG -co QUALITY=50 input.tif output.jpg
The input.tif has already stored into my object storage and storlet can read it and give it to me as inputstream, also I have some practice how to run external process inside java with java ProcessBuilder but, imagine I receive input.tif as InputStream not a file.
Next, I don't want to write back InputStream to local storage where my application running there because of lack of storage ( maybe the object are very large, more the 2GBs) and also degrading performance.
Is there any way in java to pass InputStream to external process as a file argument without storing it on disk.
I am running my code on Ubuntu Docker
I don´t think you can do that, a File needs to be stored in a File system (either local or remote) to be read. You could try to base a ByteArrayInputStream to the reading process but the GDAL process should support that type of input:
https://gdal.org/programs/gdal_translate.html#cmdoption-gdal_translate-arg-src_dataset
As per the GDAL documentation, it does not seem possible:
<src_dataset>
The source dataset name. It can be either file name, URL of data source or subdataset name for multi-dataset files.
I'm attempting to run an Access function through Java using Jacob using Application.Run (https://msdn.microsoft.com/en-us/library/office/ff193559.aspx). I am able to open and close an Access database, but not run a function. I suspect the run call actually does go through but that I have opened the file read-only (maybe? not sure I did) which then causes the Access error: Run-time error 3073: Operation must use an updatable query. The query simply appends two strings onto a test table I created, and that query works by hand, but so far not through Java.
If the error is that I've opened it read-only, how can I open it not read-only? If it's something else, how do I call a function (or a macro, either will work) using Jacob? Or you may know some other Java technique besides using Jacob, I'd take that too.
Minimum example:
Java program
import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.ComThread;
import com.jacob.com.Dispatch;
import com.jacob.com.LibraryLoader;
import com.jacob.com.Variant;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* #author evans
*/
public class Test {
public static void main(String[] args) {
// Load library/.dll
try {
String libFile = System.getProperty("os.arch").equals("amd64") ? "jacob-1.18-x64.dll" : "jacob-1.18-x86.dll";
FileInputStream inputStream = new FileInputStream(new File(libFile));
File temporaryDll = File.createTempFile("jacob", ".dll");
try (FileOutputStream outputStream = new FileOutputStream(temporaryDll)) {
byte[] array = new byte[8192];
for (int i = inputStream.read(array); i != -1; i = inputStream.read(array)) {
outputStream.write(array, 0, i);
}
}
System.setProperty(LibraryLoader.JACOB_DLL_PATH, temporaryDll.getAbsolutePath());
LibraryLoader.loadJacobLibrary();
temporaryDll.deleteOnExit();
} catch (IOException ex) {
Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex);
}
// Open thread
ComThread.InitSTA(true);
// New application
ActiveXComponent ComBridge = new ActiveXComponent("Access.Application");
// Open database
Dispatch.put(ComBridge, "Visible", new Variant(true));
ComBridge.invoke("OpenCurrentDatabase", new Variant("C:/Users/evans/Documents/Book Business/Building Reports/Book Business.accdb"));
// Run function
ComBridge.invoke("Run", new Variant("Test"));
// Shutdown
ComBridge.invoke("Quit");
ComThread.quitMainSTA();
ComThread.Release();
}
}
Access query:
INSERT INTO tblTest ( Test, Test2 )
SELECT "a" AS Expr1, "B" AS Expr2;
I am able to take screenshot by ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
In my application I have to take screenshot for every page so I want to save the multiple screenshot into a single .doc file one by one.
Is there any API?
Any Idea?
Please Help...
Easiest way - take screenshot, put it in PNG/JPEG file, read it, add it in MS-Word, delete the file, simple. here's a ready to use code for you.... BINGO...!!
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.concurrent.TimeUnit;
import javax.imageio.ImageIO;
import org.apache.poi.util.Units;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFRun;
public class TakeScreenshots {
public static void main(String[] args) {
try {
XWPFDocument docx = new XWPFDocument();
XWPFRun run = docx.createParagraph().createRun();
FileOutputStream out = new FileOutputStream("d:/xyz/doc1.docx");
for (int counter = 1; counter <= 5; counter++) {
captureScreenShot(docx, run, out);
TimeUnit.SECONDS.sleep(1);
}
docx.write(out);
out.flush();
out.close();
docx.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void captureScreenShot(XWPFDocument docx, XWPFRun run, FileOutputStream out) throws Exception {
String screenshot_name = System.currentTimeMillis() + ".png";
BufferedImage image = new Robot()
.createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));
File file = new File("d:/xyz/" + screenshot_name);
ImageIO.write(image, "png", file);
InputStream pic = new FileInputStream("d:/xyz/" + screenshot_name);
run.addBreak();
run.addPicture(pic, XWPFDocument.PICTURE_TYPE_PNG, screenshot_name, Units.toEMU(350), Units.toEMU(350));
pic.close();
file.delete();
}
}
Selenium Webdriver do not provide any feature to add snapshot in word file.
For this you need to use third party libraries.
Refer below:-
how to insert image into word document using java
How can I add an Image to MSWord document using Java
You can also add your image file in TestNG output file using reporter
Refer below :-
http://www.automationtesting.co.in/2010/07/testng-take-screenshot-of-failed-test.html
Hope it will help you :)
i have axis m1114 ip camera
i want to display live streaming as well as record streaming using java. i tried following code but frame rate is very low
please suggest some api gives me more frame rate and recording functionality.
import java.io.File;
import java.net.URL;
import com.googlecode.javacpp.Loader;
import com.googlecode.javacv.*;
import com.googlecode.javacv.cpp.*;
import static com.googlecode.javacv.cpp.opencv_core.*;
import static com.googlecode.javacv.cpp.opencv_imgproc.*;
import static com.googlecode.javacv.cpp.opencv_calib3d.*;
import static com.googlecode.javacv.cpp.opencv_objdetect.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import javax.imageio.ImageIO;
import demo.authenticator.MyAuthenticator;
import java.net.Authenticator;
import java.net.MalformedURLException;
import org.jcodec.api.SequenceEncoder;
public class Demo {
public static void main(String[] args) throws IOException {
CanvasFrame CamWindow = new CanvasFrame("Camera");
int i=0,j=0;
URL url = null ;
SequenceEncoder encoder=new SequenceEncoder(new File("video.mp4"));
try {
// Create a new URL object from the URL-string of our camera.
url = new URL("http://192.168.168.92/axis-cgi/jpg/image.cgi");
} catch (MalformedURLException m) {
m.getMessage();
}
// Check if this camera requires authentication.
// If so, then create and set the authenticator object.
MyAuthenticator authenticator = new MyAuthenticator("root",
"pass");
Authenticator.setDefault(authenticator);
Long stime=System.currentTimeMillis();
while(true){
i++;
//InputStream is = url.openStream();
BufferedImage image = ImageIO.read(url);
CamWindow.showImage(image);
// is.close();
/* if(i<100)
{
encoder.encodeImage(image);
}
else
{
if(j==0)
{
encoder.finish();
j++;
System.out.println("video saved");
System.out.println((System.currentTimeMillis()-stime)/1000+"seconds");
}
}*/
System.out.println((System.currentTimeMillis()-stime));
}
}
}
The Axis camera API is here: http://www.axis.com/files/manuals/vapix_video_streaming_52937_en_1307.pdf
You need to use this:
http:///axis-cgi/mjpg/video.cgi
instead of the image URL you have now. Getting a still image from the Axis camera will be very choppy. You need to use the Motion JPEG feed it spits out.
I have also gone through for these solutions and one of the good API i found is WEBCAM-Capture. I rate it good for some reasons
It is updated
It is open source
Many Examples
And most IMPORTANT its support from its developers is fast and accurate rather than other Camera supporting APIs.
Hope this would help you.