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How to copy and compress and then paste multiple jpg images [duplicate]

From pagespeed I am getting only image link and possible optimizations in bytes & percentage like,
Compressing and resizing https://example.com/…ts/xyz.jpg?036861 could save 212KiB (51% reduction).
Compressing https://example.com/…xyz.png?303584508 could save 4.4KiB (21% reduction).
For an example I have image of size 300kb and for this image pagespeed is displaying 100kb & 30% of reduction.
This is only for one image but I am sure I will have lots of images for compression.
so how can I compress image by passing bytes or percentage as a parameter or using anyother calculations in java
(by using API or image-processing Tool) so,that I can get compressed version of image as suggested by google.
Thanks in advance.

You can use Java ImageIO package to do the compression for many images formats, here is an example
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Iterator;
import javax.imageio.*;
import javax.imageio.stream.*;
public class Compresssion {
public static void main(String[] args) throws IOException {
File input = new File("original_image.jpg");
BufferedImage image = ImageIO.read(input);
File compressedImageFile = new File("compressed_image.jpg");
OutputStream os = new FileOutputStream(compressedImageFile);
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpg");
ImageWriter writer = (ImageWriter) writers.next();
ImageOutputStream ios = ImageIO.createImageOutputStream(os);
writer.setOutput(ios);
ImageWriteParam param = writer.getDefaultWriteParam();
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionQuality(0.05f); // Change the quality value you prefer
writer.write(null, new IIOImage(image, null, null), param);
os.close();
ios.close();
writer.dispose();
}
}
You can find more details about it here
Also there are some third party tools like these
https://collicalex.github.io/JPEGOptimizer/
https://github.com/depsypher/pngtastic
EDIT: If you want to use Google PageSpeed in your application, it is available as web server module either for Apache or Nginx, you can find how to configure it for your website here
https://developers.google.com/speed/pagespeed/module/
But if you want to integrate the PageSpeed C++ library in your application, you can find build instructions for it here.
https://developers.google.com/speed/pagespeed/psol
It also has a Java Client here
https://github.com/googleapis/google-api-java-client-services/tree/main/clients/google-api-services-pagespeedonline/v5

There is colour compression ("compression quality") and there is resolution compression ("resizing"). Fujy's answer deals with compression quality, but this is not where the main savings come from: the main savings come from resizing down to a smaller size. E.g. I got a 4mb photo to 207K using the maximum compression quality using fujy's answer, and it looked awful, but I got it down to 12K using a reasonable quality but a smaller size.
So the above code should be used for "compression quality", but this is my recommendation for resizing:
https://github.com/rkalla/imgscalr/blob/master/src/main/java/org/imgscalr/Scalr.java
I wish resizing was part of the standard Java libraries, but it seems it's not, (or there are image quality problems with the standard methods?). But Riyad's library is really small - it's just one class. I just copied this class into my project, because I never learnt how to use Maven, and it works great.

One liner java solution: thumbnailator.
Maven dependency:
<!-- https://mvnrepository.com/artifact/net.coobird/thumbnailator -->
<dependency>
<groupId>net.coobird</groupId>
<artifactId>thumbnailator</artifactId>
<version>0.4.17</version>
</dependency>
The one liner:
Thumbnails.of(inputImagePathString).scale(scalingFactorFloat).outputQuality(qualityFactorFloat).toFile(outputImagePathString);

As a solution for this problem I can recommend the API of TinyPNG.
You can use it for compressing as well as resizing the image.
Documentation: tinypng.com/developers/reference/java

Does ImageIO.read() take EXIF orientation metadata into account?

In JPEG images, EXIF metadata is sometimes included and tells in what orientation the image should be shown.
The question is, whether Java's ImageIO.read() takes EXIF into account while reading a JPEG image, and automatically applies the transformation.
More concretely, if I use Java's ImageIO for converting a JPEG image with EXIF into a PNG image, is the orientation of the PNG image going to be correct? Or is the below code going to produce a PNG image without taking EXIF orientation instructions into account?
private byte[] convertToPng(byte[] imageFileAsByteArray) {
ByteArrayInputStream bis = new ByteArrayInputStream(imageFileAsByteArray);
BufferedImage bi = ImageIO.read(bis);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ImageIO.write(bi, "png", bos);
return bos.toByteArray();
}

The short answer is, unfortunately, no; ImageIO.read(..) (by default) does not take the Exif Orientation tag into account. Your PNG will be not be rotated accordingly.
However, all ImageIO.read(..) does internally, is to look up an appropriate ImageReader plug-in for the input, and delegate reading to it. And while the JRE-bundled plug-in does not take Exif into account, it is possible to add support for it, in a third-party ImageReader. Unfortunately, I don't know of any that do, but I am considering adding Exif orientation support to the TwelveMonkeys ImageIO JPEGImageReader in the future.
In the mean time, you have to apply the rotation yourself, by reading the metadata and rotating. The value of the orientation tag can be acquired either using the ImageIO JPEG metadata or some third-party library. I think both the mentioned metadata-extractor or TwelveMonkeys ImageIO can be used for this purpose. JAI ImageIO (using the TIFF metadata) can probably also do this.
If using the ImageIO JPEG metadata, be aware:
Note that an application wishing to interpret Exif metadata given a metadata tree structure in the javax_imageio_jpeg_image_1.0 format must check for an unknown marker segment with a tag indicating an APP1 marker and containing data identifying it as an Exif marker segment.

I have struggled with jpeg exif orientation for awhile, and now that I set out to fix my problems, I find that they are gone. To make sure for myself, I simplified OP.s example so as to read
public static void main (String [] args) throws Exception {
java.io.File in = new java.io.File ("in.jpg");
java.io.File out = new java.io.File ("out.png");
BufferedImage image = ImageIO.read (new FileInputStream(in));
ImageIO.write (image, "png", out);
}
in.jpg is a picture with exif orientation tag 8, tilted to the left. When I run the example, out.png is created as a properly oriented png picture. So it seems that ImageIo has learned something recently.

Decoding of old style JPEG-in-TIFF data is not supported

I need to display the 3rd page of scanned tiff files. i used the code
TIFFReader reader = new TIFFReader(new File(pathOfFile));
RenderedImage image = reader.getPage(2);
its sometimes work. and show error : Decoding of old style JPEG-in-TIFF data is not supported.
I used aspriseTIFF.jar
then how i solve this problem.
please reply.
thanks in advance

The problem you have run into is that "old style" JPEG compression in the TIFF format (compression == 6), is not supported in the library you use.
This is quite common I guess, as "old-style" JPEG compression is deprecated in TIFF, because it was never fully specified. And because of this under-specification, various vendors implemented it in different, incompatible ways. Support was dropped in favor for TIFF compression 7, JPEG.
Unfortunately, old TIFF files using this compression still exists, so you need to find another library. The good news is that you can use ImageIO and a proper plug-in.
Using a TIFF ImageReader plug-in, like the one from my TwelveMonkeys ImageIO open source project, you should be able to do this:
// Create input stream
try (ImageInputStream input = ImageIO.createImageInputStream(file)) {
// Get the reader
ImageReader reader = ImageIO.getImageReaders(input).next();
try {
reader.setInput(input);
// Read page 2 of the TIFF file
BufferedImage image = reader.read(2, null);
}
finally {
reader.dispose();
}
}
(sorry about the try/finally boiler-plate, but it is important to avoid resource/memory leaks).

DICOM JPEG compression not yet supported in Android

DicomDroid.jar used to open a .dcm formated image in my Android application. I got the follwing exception when try to open it.
java.io.IOException: DICOM JPEG compression not yet supported
Adding my code below
try {
// Read the imagefile into a byte array (data[])
File imagefile = new File(path);
byte[] data = new byte[(int) imagefile.length()];
FileInputStream fis = new FileInputStream(imagefile);
fis.read(data);
fis.close();
// Create a DicomReader with the given data array (data[])
DicomReader DR = new DicomReader(data);
} catch (Exception ex) {
Log.e("ERROR", ex.toString());
}
What can be done to avoid this error?
Thanks in advance.

The cause is pretty obvious. That DICOM library doesn't support that particular kind of DICOM file.
There's not much you can do about it ... unless you are prepared to enhance the library yourself.
But I think you have probably made a mistake in setting up your instrument to generate DICOM files with JPEG compression. JPEG is lossy, and best practice is to capture and store images with the best resolution feasible. If you need to downgrade resolution to reduce bandwidth, it would be better to
save a high resolution DICOM,
convert the DICOM to a low resolution JPG, and
send the JPEG.

Another option is to get the Dicom file in an uncompressed format (ej: Explicit VR Little Endian). This is the simplest dicom file format and every dicom library has support for such format.
So, when you get your Dicom file from your PACS, force this transfer syntax. This way, your dicom library will be able to deal with the image file.

Convert a bitmap image to an uncompressed tif image in Java

I'm trying to convert a bitmap image into an uncompressed tif file for use with the Tesseract OCR engine.
I can use this method to produce a compressed tif file...
final BufferedImage bmp = ImageIO.read(new File("input.bmp"));
ImageIO.write(bmp, "jpg", new File("output.tif"));
This produces an empty tif file when the "jpg" is changed to tif as these files are dealt with in Java Advanced Imaging (JAI).
How can I create an uncompressed tif image? Should I decompress the tif image produced from the above code or is there another way to handle the conversion process?
Any examples provided would be much appreciated.
Thanks
kingh32

You can use ImageWriteParam to disable compression:
TIFFImageWriterSpi spi = new TIFFImageWriterSpi();
ImageWriter writer = spi.createWriterInstance();
ImageWriteParam param = writer.getDefaultWriteParam();
param.setCompressionMode(ImageWriteParam.MODE_DISABLED);
ImageOutputStream ios = ImageIO.createImageOutputStream(new File("output.tif"));
writer.setOutput(ios);
writer.write(null, new IIOImage(bmp, null, null), param);

Some time before i was facing the problems with tiff images reading and conversion with jai.
I found that it need to install support for working with tiff images in jai, then it works fine for me u can also get it form here:
https://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/ViewProductDetail-Start?ProductRef=jaiio-1.0_01-oth-JPR#CDS-CDS_Developer
and install over a jvm then it will also work for you.
you can also have a look here
Java / JAI - save an image gray-scaled