Develop Reference

How to compress images without losing the original file?

I'm using this code for image compression before uploading the images :
public File saveBitmapToFile(File file) {
try {
// BitmapFactory options to downsize the image
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
o.inSampleSize = 6;
// factor of downsizing the image
FileInputStream inputStream = new FileInputStream(file);
//Bitmap selectedBitmap = null;
BitmapFactory.decodeStream(inputStream, null, o);
inputStream.close();
// The new size we want to scale to
final int REQUIRED_SIZE = 75;
// Find the correct scale value. It should be the power of 2.
int scale = 1;
while (o.outWidth / scale / 2 >= REQUIRED_SIZE &&
o.outHeight / scale / 2 >= REQUIRED_SIZE) {
scale *= 2;
}
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
inputStream = new FileInputStream(file);
Bitmap selectedBitmap = BitmapFactory.decodeStream(inputStream, null, o2);
inputStream.close();
FileOutputStream outputStream = new FileOutputStream(file);
selectedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
return file;
} catch (Exception e) {
return null;
}
}
The problem is the original image will be affected and get resized.
How to compress images without overwriting and losing the original one?
Update 1 :
I changed the last part of the code to this but still doesn't work.
now the image wouldn't get resized
File new_file =new File("/storage/emulated/0/DCIM/Screenshots/tmp.png");
try
{
new_file.createNewFile();
}
catch (IOException e)
{
e.printStackTrace();
}
Log.d("Create File", "File exists?"+new_file.exists());
FileOutputStream outputStream = new FileOutputStream(new_file);
selectedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
return file;
Update 2 :
I've changed the code to this so the problem is partly solved. Now I can have an original quality of each image in a file named tmp"+new Date()+".png but the original file still will be overwritten.
File new_file =new File(String.valueOf("/storage/emulated/0/DCIM/Screenshots/tmp"+new Date()+".png"));
try
{
new_file.createNewFile();
FileOutputStream outputStream = new FileOutputStream(new_file, true);
selectedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
}
catch (IOException e)
{
e.printStackTrace();
}
Log.d("Create File", "File exists?"+new_file.exists());
FileOutputStream outputStream = new FileOutputStream(file);
selectedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);

Create a new File and make the FileOutputStream write to it, rather than writing to the original.

New Answer
Your case is quite unique, what if you try this:
Rather than directly using the Bitmap from InputStream, try use it's copy().
That way, the one that you compress will be the copy of the Bitmap. And you can compress that in your new FileOutputStream without modifying the original file.
And remove the second compression. Just dont do anything with your original file.

Convert CCITT Group 3 1-Dimensional TIFF to PDF using iText in Java

I am experiencing an EOF Exception as follows when attempting to read tiff files using iText 5.5.10
ExceptionConverter: java.io.EOFException
at com.itextpdf.text.pdf.RandomAccessFileOrArray.readFully(RandomAccessFileOrArray.java:249)
at com.itextpdf.text.pdf.RandomAccessFileOrArray.readFully(RandomAccessFileOrArray.java:241)
at com.itextpdf.text.pdf.codec.TiffImage.getTiffImage(TiffImage.java:209)
at com.itextpdf.text.pdf.codec.TiffImage.getTiffImage(TiffImage.java:314)
at com.itextpdf.text.pdf.codec.TiffImage.getTiffImage(TiffImage.java:302)
at com.itextpdf.text.Image.getInstance(Image.java:428)
at com.itextpdf.text.Image.getInstance(Image.java:374)
at TiffToPdf.main(TiffToPdf.java:137)
The code I am using is:
byte[] data = null;
Image img = null;
try {
data = Files.readAllBytes(Paths.get("tiff.tif"));
img = Image.getInstance(data, true);
}
catch (Exception e) {
e.printStackTrace();
}
I have tried skipping the Image step and using the TiffImage class explicitly but I experience the same error.
byte[] data = null;
Image img = null;
try {
data = Files.readAllBytes(Paths.get("tiff.tif"));
RandomAccessSourceFactory factory = new RandomAccessSourceFactory();
RandomAccessSource fileBytes = factory.createSource(data);
RandomAccessFileOrArray s = new RandomAccessFileOrArray(fileBytes);
img = TiffImage.getTiffImage(s, true, 1, true);
}
catch (Exception e) {
e.printStackTrace();
}
I noticed that there are 2 classes within iText called TIFFFaxDecompressor and TIFFFaxDecoder but I haven't been able to find any resources online on how to use them.

with your given tiff image, the following code does worked for me i.e., converted to pdf successfully.
byte[] data = null;
com.itextpdf.text.Image img = null;
try {
//System.out.println(Paths.get("src/main/resources/tiff.tif"));
data = Files.readAllBytes(Paths.get("src/main/resources/file.tif"));
RandomAccessSourceFactory factory = new RandomAccessSourceFactory();
RandomAccessSource fileBytes = factory.createSource(data);
RandomAccessFileOrArray s = new RandomAccessFileOrArray(fileBytes);
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream("src/main/resources/destination.pdf"));
document.open();
int pages = TiffImage.getNumberOfPages(s);
Image image;
for (int i = 1; i <= pages; i++) {
image = TiffImage.getTiffImage(s, i);
Rectangle pageSize = new Rectangle(image.getWidth(),
image.getHeight());
document.setPageSize(pageSize);
document.newPage();
document.add(image);
}
document.close();
} catch (Exception e) {
e.printStackTrace();
}

Convert from Itext PDF byte array to multipage TIFF file

I have a pdf file (obtained from a byte[] generated by iText) I need to send to a signature hardware.
Due some incompatibility with the java printer driver I can't send the PDF directly, so i need to convert it to images before. I've succeed converting each PDF page to a jpg file, but customer does not like solution cause signatures are not in all the document, only in individual pages.
As I've not found any free library, I decided to make it in four steps:
STEP1: generate PDF with itext and persist it.
FileOutputStream fos = new FileOutputStream("tempFile.pdf");
fos.write(myByteArray);
fos.close();
fos.flush();
STEP 2: convert from PDF multipaged to List<java.awt.Image>
List<Image> images = null;
Ghostscript.getInstance(); // create gs instance
PDFDocument lDocument = new PDFDocument();
lDocument.load(new File("tempFile.pdf"));
SimpleRenderer renderer = new SimpleRenderer();
renderer.setResolution(300);
try
{
images = renderer.render(lDocument);
}
catch (RendererException | DocumentException e)
{
e.printStackTrace();
}
Step 3: Now I iterate over List<java.awt.Image> to convert to an individual TIFF's.
int filename = 1;
TIFFEncodeParam params = new TIFFEncodeParam();
Iterator<Image> imageIterator = images.iterator();
while (imageIterator.hasNext()) {
BufferedImage image = (BufferedImage) imageIterator.next();
FileOutputStream os = new FileOutputStream(/*outputDir + */ filename + ".tif");
JAI.create("encode", image , os, "TIFF", params);
filename ++;
}
STEP 4: create multipaged TIFF from various individual TIFF files
BufferedImage image[] = new BufferedImage[paginas];
for (int i = 0; i < paginas; i++) {
SeekableStream ss = new FileSeekableStream((i + 1) + ".tif");
ImageDecoder decoder = ImageCodec.createImageDecoder("tiff", ss, null);
PlanarImage pi = new NullOpImage(decoder.decodeAsRenderedImage(0),null,null,OpImage.OP_IO_BOUND);
image[i] = pi.getAsBufferedImage();
ss.close();
}
TIFFEncodeParam params = new TIFFEncodeParam();
params.setCompression(TIFFEncodeParam.COMPRESSION_DEFLATE);
OutputStream out = new FileOutputStream(nombre +".tif");
ImageEncoder encoder = ImageCodec.createImageEncoder("tiff", out, params);
List <BufferedImage>list = new ArrayList<BufferedImage>(image.length);
for (int i = 1; i < image.length; i++) {
list.add(image[i]);
}
params.setExtraImages(list.iterator());
encoder.encode(image[0]);
out.close();
System.out.println("Done.");
DONE. Hope that helps for someone else with same problem.

I had same issue a while ago. I got lot of help from here:
Multiple page tif
Allso check:
JAI (Java Advance Image)
Here is the conde snippet to convert pdf pages to png images (using org.apache.pdfbox library):
PDDocument document = null;
document = PDDocument.load(pdf1);
int pageNum = document.getNumberOfPages();
PDFImageWriter writer = new PDFImageWriter();
String filename = pdf1.getPath() + "-";
filename = filename.replace(".pdf", "");
writer.writeImage(document, "png", "", 1, Integer.MAX_VALUE, filename);
document.close();
And after that i converted each PNG image to TIFF and then from multiple TIFF images to single multi paged TIFF.

PdfBox: issues when creating pdf from bmp

When generating a PDF form BMP the result is allways curios.
Input "hellowworld.bmp"
Output (only the relevant part)
why is there a loss of quality
why is it repeated three times
why is there a black square ( green Frame)
Heres how i test it:
#Test
public final void testWriteSingleBMPtoPDF() throws IOException {
Assert.assertTrue("File existst", TestFileHelper.getBMP(BMPS.HELLOWORLD).exists());
Assert.assertTrue("File readable", TestFileHelper.getBMP(BMPS.HELLOWORLD).canRead());
ArrayList<File> doc = new ArrayList<EncodedPage>();
doc.add(createPage(BMPS.HELLOWORLD));
File result = null;
try {
result = ConvertPDF.bmpToPDF(doc);
} catch (COSVisitorException e) {
e.printStackTrace();
}
Assert.assertTrue("File existst", result.exists());
Assert.assertTrue("File readable", result.canRead());
System.out.println("Please Check >"+result+"<");
}
Heres the part of my java implementation
public static File bmpToPDF(ArrayList<File> inputDoc)
PDDocument document = new PDDocument();
String saveTo = "C:\\temp\\" + System.currentTimeMillis() + ".pdf";
for (File bmpPage : inputDoc) {
PDPage page = null;
PDXObjectImage ximage = null;
page = new PDPage();
document.addPage(page);
BufferedImage awtImage = ImageIO.read(bmpPage);
ximage = new PDPixelMap(document, awtImage);
PDPageContentStream content = new PDPageContentStream(document, page);
content.drawImage(ximage, 0, 0);
content.close();
}
document.save(saveTo);
document.close();
return new File(saveTo) ;
Version of Apache PDFBox is 1.7.1

How to reduce PDF file size programmatically in Java?

Document document = new Document(reader.getPageSizeWithRotation(1));
PdfCopy writer = new PdfCopy(document, new FileOutputStream(outFile));
document.open();
PdfImportedPage page = writer.getImportedPage(reader, ++i);
writer.setFullCompression();
writer.addPage(page);
document.close();
writer.close();
I am using iText to split and merger the PDF, I need your help to reduce (compress) the output PDF size programmatically. Please let me know the steps to achieve the same.

use iText
PdfReader reader = new PdfReader(new FileInputStream("input.pdf"));
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("output.pdf"));
int total = reader.getNumberOfPages() + 1;
for ( int i=1; i<total; i++) {
reader.setPageContent(i + 1, reader.getPageContent(i + 1));
}
stamper.setFullCompression();
stamper.close();

With writer.setFullCompression() you already compressed file as much as possible. With iText you can't do anything more.

Also change the PdfCopy to PdfSmartCopy. It will eliminate duplicate streams which have the same hash (md5).

You can use ghostscript, invoking the exe with specific parameters for print your pdf with the ghostscript's pdfwriter (example: sDEVICE=pdfwrite -sOutputFile=myfile.pdf). There are several accepted parameters, for compression or quality levels, etc.
It may result and optimized and smaller file.

Multiple Bitmap Image to pdf converter --> Compressed Pdf
public static String createPDFWithMultipleImage(Bitmap[] bitmaps, String pdf_name){
String directoryPath = Environment.getExternalStorageDirectory() + "/OpPath/";
File file = new File(directoryPath,pdf_name);
try {
FileOutputStream fileOutputStream = new FileOutputStream(file);
PdfDocument pdfDocument = new PdfDocument();
for (int i = 0; i < bitmaps.length; i++){
Bitmap original = bitmaps[i];
int nh = (int) ( original.getHeight() * (512.0 / original.getWidth()) );
Bitmap bitmap = Bitmap.createScaledBitmap(original, 512, nh, true);
PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(bitmap.getWidth(), bitmap.getHeight(), (i + 1)).create();
PdfDocument.Page page = pdfDocument.startPage(pageInfo);
Canvas canvas = page.getCanvas();
Paint paint = new Paint();
paint.setColor(Color.BLUE);
canvas.drawPaint(paint);
canvas.drawBitmap(bitmap, 0f, 0f, null);
pdfDocument.finishPage(page);
bitmap.recycle();
}
pdfDocument.writeTo(fileOutputStream);
pdfDocument.close();
return file.toString();
} catch (IOException e) {
e.printStackTrace();
return file.toString();
}
}