Categories

See More
Popular Forum

MBA (4887) B.Tech (1769) Engineering (1486) Class 12 (1030) Study Abroad (1004) Computer Science and Engineering (988) Business Management Studies (865) BBA (846) Diploma (746) CAT (651) B.Com (648) B.Sc (643) JEE Mains (618) Mechanical Engineering (574) Exam (525) India (462) Career (452) All Time Q&A (439) Mass Communication (427) BCA (417) Science (384) Computers & IT (Non-Engg) (383) Medicine & Health Sciences (381) Hotel Management (373) Civil Engineering (353) MCA (349) Tuteehub Top Questions (348) Distance (340) Colleges in India (334)
See More

Why am I getting a smaller jpg image size when converting from File->BufferedImage->byte[]

General Tech Bugs & Fixes

Max. 2000 characters
Replies

usr_profile.png

User

( 6 months ago )

 

I'm testing different ways to store a jpg file in java and using a ByteArrayInputStream from a buffered image always results in a smaller file size. Is there anyway around this?

So for the whole picture, I'm currently trying to write a client-server image storing program(with eventual editing capabilities, think adobe lightroom). Uploading to the server from the client is no problem, just use Files.readAllBytes(currentFile.toPath()); and vice-versa when downloading to the client from the server, since it's being stored as a file.

The problem is what to do when I want to upload the same image I received(Assuming the image is edited and wanted to be reuploaded to server). I don't have a file created from it so I can't use the readAllBytes functions, they're only stored as an Image Object or BufferedImage. When I write that to a ByteArrayInputStream and get the size of the byte[] array to send back to the server, it's always smaller than the originals.

As a last resort I can make this into an export option so you have to download an image from the server onto the computer before editing, but it would make workflow less efficient.

currentFile = fileChooser.showOpenDialog(window);
            try{

            currentImage = new Image(currentFile.toURI().toString());
            SelectedImageView.setImage(currentImage);
            MainImageLayout.setLeft(SelectedImageView);


            System.out.println("Original file length "+currentFile.length());

                try {
                    BufferedImage bImage = ImageIO.read(currentFile);

                    byte[] fileContent = Files.readAllBytes(currentFile.toPath());
                    System.out.println("bytes from fileContent " +fileContent.length);

                    ByteArrayOutputStream tmp = new ByteArrayOutputStream();
                    ImageIO.write(bImage, "jpg", tmp);
                    tmp.flush();
                    byte[] imageBytes = tmp.toByteArray();
                    tmp.close();
                    long length = imageBytes.length;


                    System.out.println("length of bytearraystream " + length);

Printed Results:
Original file length 196874
bytes from fileContent 196874
length of bytearraystream 117010

what's your interest


forum_ban8_5d8c5fd7cf6f7.gif