JPEG | JPEG implementation in Java featuring encoder | Compression library

 by   terifan Java Version: Current License: Unlicense

kandi X-RAY | JPEG Summary

kandi X-RAY | JPEG Summary

JPEG is a Java library typically used in Utilities, Compression applications. JPEG has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. However JPEG build file is not available. You can download it from GitHub.

This is a JPEG implementation in Java featuring encoder, decoder and transcoder including support for arithmetic entropy compression

            kandi-support Support

              JPEG has a low active ecosystem.
              It has 4 star(s) with 1 fork(s). There are no watchers for this library.
              It had no major release in the last 6 months.
              There are 1 open issues and 0 have been closed. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of JPEG is current.

            kandi-Quality Quality

              JPEG has 0 bugs and 0 code smells.

            kandi-Security Security

              JPEG has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              JPEG code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              JPEG is licensed under the Unlicense License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              JPEG releases are not available. You will need to build from source code and install.
              JPEG has no build file. You will be need to create the build yourself to build the component from source.
              It has 11845 lines of code, 503 functions and 90 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed JPEG and discovered the below as its top functions. This is intended to give you an instant insight into JPEG implemented functionality, and help decide if they suit your requirements.
            • Encode a single MCU
            • Encode MCU segment
            • Encode MCU data block
            • Encode ACU coefficients
            • Example of how to shuffle the image
            • Shuffles the array of coefficients
            • Updates the image using the given coefficients
            • Compute entropy
            • Compute the derived values for a given JPEG table
            • Encodes RGB values into two shorts
            • Returns the sub - sampling mode for this component
            • Dump the hexdump of the buffer
            • Initialization method
            • Decodes a signed value
            • Encodes RGB values
            • Loads the image
            • Extract Exif data from a JPEG image
            • Randomly shuffle the input matrix with the provided parameters
            • Initialize a JPEG scan
            • Performs the actual encoding
            • Replace the Exif data in a JPEG image
            • Handle the mouse wheel
            • Paint the image
            • Prints an image choosen dialog
            • Parse the progression script
            • Decide if the input JPEG is valid
            Get all kandi verified functions for this library.

            JPEG Key Features

            No Key Features are available at this moment for JPEG.

            JPEG Examples and Code Snippets

            Adjust JPEG quality .
            pythondot img1Lines of Code : 74dot img1License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def adjust_jpeg_quality(image, jpeg_quality, name=None):
              """Adjust jpeg encoding quality of an image.
              This is a convenience method that converts an image to uint8 representation,
              encodes it to jpeg with `jpeg_quality`, decodes it, and then con  
            Random JPEG encoding .
            pythondot img2Lines of Code : 52dot img2License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def stateless_random_jpeg_quality(image,
              """Deterministically radomize jpeg encoding quality for induci  
            Return random JPEG quality .
            pythondot img3Lines of Code : 50dot img3License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def random_jpeg_quality(image, min_jpeg_quality, max_jpeg_quality, seed=None):
              """Randomly changes jpeg encoding quality for inducing jpeg noise.
              `min_jpeg_quality` must be in the interval `[0, 100]` and less than

            Community Discussions


            SSIS package fails to process all rows with C# Script task when started with SQL Server Agent
            Asked 2022-Mar-07 at 16:58

            I have a requirement to build a SSIS package that sends HTML formatted emails and then saves the emails as tiff files. I have created a script task that processes the necessary records and then coverts the HTML code to the tiff. I have split the process into separate packages, the email send works fine the converting HTML to tiff is causing the issue.

            When running the package manually it will process all files without any issues. my test currently is about 315 files this needs to be able to process at least 1,000 when finished with the ability to send up to 10,000 at one time. The problem is when I set the package to execute using SQL Server Agent it stops at 207 files. The package is deployed to SQL Server 2019 in the SSIS Catalog

            What I have tried so far

            I started with the script being placed in a SSIS package and deployed to the server and calling the package from a step (works 99.999999% of the time with all packages) tried both 32 and 64 bit runtime. Never any error messages just Unexpected Termination when looking at the execution reports. When clicking in the catalog and executing package it will process all the files. The SQL Server Agent is using a proxy and I also created another proxy account with my admin credentials to test for any issues with the account.

            Created another package to call the package and used the Execute Package Task to call the first package, same result 207 files. Changed the execute Process task to an Execute SQL Task and tried the script that is created to manually start a package in the catalog 207 files. Tried executing the script from the command line both through the other SSIS package and the SQL Server Agent directly same results 207 files. If I try any of those methods directly outside SQL Server Agent the process runs no issues.

            I converted the script task to a console application and it works processing all the files. When calling the executable file from any method from the SQL Server Agent it once again stops at the 207 files.

            I have consulted with the companies DBA and Systems teams and they have not found anything that could be causing this error. There seems to be some type of limit that no matter the method of execution SQL Server Agent will not allow. I have mentioned looking at third-party applications but have been told no.

            I have included the code below that I have been able to piece together. I am a SQL developer so C# is outside my knowledge base. Is there a way to optimize the code so it only uses one thread or does a cleanup between each letter. There may be a need for this to create over ten thousand letters at certain times.


            I have replaced the code with the new updated code. The email and image creation are all included as this is what the final product must do. When sending the emails there is a primary and secondary email address and depending on what email address is used it will change what the body of the email contains. When looking at the code there is a section of try catch that sends to primary when indicated to and if that fails it send to secondary instead. I am guessing there is a much cleaner way of doing that section but this is my first program as I work in SQL for everything else.

            Thank You for all the suggestions and help.

            Updated Code



            Answered 2022-Mar-07 at 16:58

            I have resolved the issue so it meets the needs of my project. There is probably a better solution but this does work. Using the code above I created an executable file and limited the result set to top 100. Created a ssis package with a For Loop that does a record count from the staging table and kicks off the executable file. I performed several tests and was able to exceed the 10,000 limit that was a requirement to the project.



            Created image with use-react-screenshot is incorrectly rendered
            Asked 2022-Mar-01 at 15:05

            I'm using use-react-screenshot to take a screenshot of a specific dom element, but the image gets weird, it looks like it partially renders the dom element

            I'm using the sample code in create-react-app



            Answered 2022-Feb-28 at 07:23

            On github there were a lot of issues related with SVG not downloading properly with html2canvas. I suspect these to be the issues. Solutions / workaround provided by users includes code modifications to the internal code. This is again hard to maintain further along. Also Firefox showed blank image when downloaded.

            My best solution would be to use an alternative library like html-to-image. Within a few minutes everything seems to be working with this. (Even Firefox)



            How to position a real Docx file in a Material CardMedia
            Asked 2022-Feb-27 at 22:41

            I have a Codesandbox

            I have this app that displays different files like jpg, mp4 or now docx files. I can't make docx file position so it look good but jpg or mp4 is working OK.

            Try it just open a doxc file.

            In file FileContentRenderer.jsx here below I use switch case and n open Component needed like docx-viewer.jsx



            Answered 2022-Jan-17 at 15:52

            Replace your return block with following block in your docx-viewer.jsx.



            Error: grid.mongo.GridStore is not a consstructor ,Using mongoose, Grid-fs-stream and grid multer storage
            Asked 2022-Jan-19 at 04:43

            I am getting the following error mentioned. The basic configs are as follow: I have uploaded the files on the server I want to download them but getting these errors I called a POST request to /api/files/delete/${fileId} Which should call the route and give back the file to the browser instead getting the error with the Grid related module.



            Answered 2021-Sep-07 at 04:57

            I also faced similar issues. The resolution for me was with mongoose version. The issue arises in the version 6.0.5 but is working in the version 5.13.7



            Video_player Crashes Android Emulator in Flutter
            Asked 2022-Jan-11 at 08:53

            I am trying to use the video_player, but I am getting the below error. I have also added an MRE (minimum reproducible example).

            I have used an emulated Pixel 4, an emulated Pixel 4 XL, and an emulator Pixel 5 with the Android Studio Beta, but none of them worked.

            The below error was when I was using a Pixel 4 XL, but the error was the same with all of them.




            Answered 2022-Jan-11 at 08:53

            It can be a bug of that Flutter package, indeed. Have you tried to create an issue in GitHub of that package?

            Secondly, during my development, I see several times when emulators just fail and real devices always work. The solution I used is - simply to do not test them on simulators. Real users never use simulators, aren't they?

            It can be a bug of the library when running on x86 arch (the arch simulators use). Then, nobody with a real device (arm arch) will ever see the bug.

            Thirdly, what about trying to use "cloud real devices" to test whether they work on real Pixel devices that you are worried about. There are many platforms that host some real devices and you can connect to them via a webpage and test your app.



            django rest Error - AttributeError: module 'collections' has no attribute 'MutableMapping'
            Asked 2022-Jan-07 at 19:13

            I'm build Django app, and it's work fine on my machine, but when I run inside docker container it's rest framework keep crashing, but when I comment any connection with rest framework it's work fine.

            • My machine: Kali Linux 2021.3
            • docker machine: Raspberry Pi 4 4gb
            • docker container image: python:rc-alpine3.14
            • python version on my machine: Python 3.9.7
            • python version on container: Python 3.10.0rc2

            error output:



            Answered 2022-Jan-07 at 19:13

            You can downgrade your Python version. That should solve your problem; if not, use instead of the deprecated collections.Mapping.

            Refer here: Link



            THREE.JS & Reality Capture - Rotation issue photogrammetry reference camera's in a 3D space
            Asked 2022-Jan-03 at 14:57

            Thanks for taking the time to review my post. I hope that this post will not only yield results for myself but perhaps helps others too!


            Currently I am working on a project involving pointclouds generated with photogrammetry. It consists of photos combined with laser scans. The software used in making the pointcloud is Reality Capture. Besides the pointcloud export one can export "Internal/External camera parameters" providing the ability of retrieving photos that are used to make up a certain 3D point in the pointcloud. Reality Capture isn't that well documented online and I have also posted in their forum regarding camera variables, perhaps it can be of use in solving the issue at hand?

            Only a few variables listed in the camera parameters file are relevant (for now) in referencing camera positioning such as filename, x,y,alt for location, heading, pitch and roll as its rotation.

            Currently the generated pointcloud is loaded into the browser compatible THREE.JS viewer after which the camera parameters .csv file is loaded and for each known photo a 'PerspectiveCamera' is spawned with a green cube. An example is shown below:

            The challenge

            As a matter of fact you might already know what the issue might be based on the previous image (or the title of this post of course ;P) Just in case you might not have spotted it, the direction of the cameras is all wrong. Let me visualize it for you with shabby self-drawn vectors that rudimentary show in what direction it should be facing (Marked in red) and how it is currently vectored (green).

            Row 37, DJI_0176.jpg is the most right camera with a red reference line row 38 is 177 etc. The last picture (Row 48 is DJI_189.jpg) and corresponds with the most left image of the clustured images (as I didn't draw the other two camera references within the image above I did not include the others).

            When you copy the data below into an Excel sheet it should display correctly ^^



            Answered 2022-Jan-02 at 22:26

            At first glance, I see three possibilities:

            • It's hard to see where the issue is without showing how you're using the createCamera() method. You could be swapping pitch with heading or something like that. In Three.js, heading is rotation around the Y-axis, pitch around X-axis, and roll around Z-axis.

            • Secondly, do you know in what order the heading, pitch, roll measurements were taken by your sensor? That will affect the way in which you initiate your THREE.Euler(xRad, yRad, zRad, 'XYZ'), since the order in which to apply rotations could also be 'YZX', 'ZXY', 'XZY', 'YXZ' or 'ZYX'.

            • Finally, you have to think "What does heading: 0 mean to the sensor?" It could mean different things between real-world and Three.js coordinate system. A camera with no rotation in Three.js is looking straight down towards -Z axis, but your sensor might have it pointing towards +Z, or +X, etc.


            I added a demo below, I think this is what you needed from the screenshots. Notice I multiplied pitch * -1 so the cameras "Look down", and added +180 to the heading so they're pointing in the right... heading.



            How do i iterate over an array of object in react.js and add the values of prices in the object as shown below
            Asked 2021-Dec-26 at 15:04
            const data = [
                    id: 1,
                    title: "buttermilk pancakes",
                    category: "fullstack",
                    price: 15.99,
                    img: "./img/item-1.jpeg",
                    desc: `I'm baby woke mlkshk wolf bitters live-edge blue bottle, hammock freegan copper mug whatever cold-pressed `,
                    id: 2,
                    title: "diner double",
                    category: "backend",
                    price: 13.99,
                    img: "./img/item-2.jpeg",
                    desc: `vaporware iPhone mumblecore selvage raw denim slow-carb leggings gochujang helvetica man braid jianbing. Marfa thundercats `,
            export default data;


            Answered 2021-Dec-25 at 14:13

            You can simply achieve the calculation of total price using forEach instead of map (as map has its own use case like creating new array, and forEach is available for us just for this simple iteration like in your use case) with a one-liner like:



            Converting image array to RGB to HSL/HSV and back?
            Asked 2021-Dec-08 at 06:59

            I read in colored jpg images using readJPEG() from the jpeg package. Now I have my images as three-dimensional arrays (width, height, channels) in R.

            I want to convert these image arrays into the HSL or HSV color space, mutate the images and save them as JPGs in the RGB format again. However, as the images are quite large (5000 x 8000), it would be too time consuming to loop through every single cell. I found the package OpenImageRto convert the image to the HSV color space quickly, however, I am confused by large negative values in the "saturation" channel. Also, the package contains no functions to convert the image back.

            Is there any package to perform fast conversions from RGB to HSL or HSV (and back)? Or is there any other way to perform the converison quickly?

            These are my current attempts for converting into one direction, element-wise:



            Answered 2021-Dec-07 at 19:57

            The whole thing is quite simple to do. Use the colorspace library for this.

            Here is my original img.jpg file.

            Here is the code.



            How to obtain smooth histogram after scaling image?
            Asked 2021-Nov-09 at 10:42

            I am trying to linearly scale an image so the whole greyscale range is used. This is to improve the lighting of the shot. When plotting the histogram however I don't know how to get the scaled histogram so that its smoother so it's a curve as aspired to discrete bins. Any tips or points would be much appreciated.



            Answered 2021-Nov-02 at 14:07

            I'm not sure if this is possible if you're linearly scaling the image. However, you could give OpenCV's Contrast Limited Adaptive Histogram Equalization a try:


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install JPEG

            You can download it from GitHub.
            You can use JPEG like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the JPEG component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer For Gradle installation, please refer .


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
            Find more information at:

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