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Questions tagged [jpeg2000]

JPEG2000 is an image encoded format intended to supercede JPEG.

JPEG 2000 is an image compression standard and coding system. It was created by the Joint Photographic Experts Group committee in 2000 with the intention of superseding their original discrete cosine transform-based JPEG standard (created in 1992) with a newly designed, wavelet-based method.

JPEG2000 is supported by Webkit based browsers (Safari, Chrome) on Mac OS X.

More information at Wikipedia page of JPEG2000

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NPAPI: data push model?

When working with NPAPI, you have the control over two functions: NPP_WriteReady & NPP_Write. This is basically a data push model. However I need to implement support for a new file format. The library I am using takes any concrete subclass of the…
malat
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build openjpeg under vc 2013

Just wondering how to build openjpeg successfully under Windows 7 and visual studio 2013. i try to install visual studio 6 witch is compatible of jpeg 2000 library but it is incompatible with window 7.
user3554447
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How to reduce j2k file size in c#?

I am using FreeImageNet.dll to compress j2k file(100KB) using various FREE_IMAGE_LOAD_FLAGS. sample code is here. string fileName=abc.jpg; string outFileName=xyz.j2k; FREE_IMAGE_FORMAT imageFormat = FREE_IMAGE_FORMAT.FIF_J2K; …
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JPEG 200 (aka J2K) handling in Silverlight app - any suggestions?

I need to handle JPEG 2000 (aka J2K) images in my silverlight app. Files stored either in the DB or file system on the server. Any suggestions how to handle them on the client? The only working converter I came across was written in Java. There are…
Alex
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Read JHOVE attributes From TIFF And JPEG-2000 Files using Python?

I am trying to read JHOVE attribues from TIFF and JP2 files. Is there a python library that makes this possible?
Alex
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diplaying jp2 in a picturebox in C# / .NET 2.0 on CE5 using FreeImage

I'm trying to display a jp2 image in a picturebox on a CE5 device using FreeImage. Everything works fine on the win32 side where I do initial code testing, but I get a compile error when compiling for CE5. This line: Bitmap bmFacial =…
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How to include jpeg2000 compression standard in code?

I am new to JAVA. I am working on Image compressions. How can I compress .jpg images with jpeg2000 in JAVA. Does java has any library?
Manasvi Karanam
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JPEG compression

I'm trying to understand the JPEG compression process and performed the following steps to verify a few things. I take an input image img1.jpg and compress it by using IrfanView, say quality=50 (img1_compress.jpg). Then I crop a small block from the…
pree
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libopenjpeg encoding with ffmpeg

The libopenjpeg codec for ffmpeg is deemed experimental. Does anyone know if it is useable for storage of archival video material, i.e. if I write a whole bunch of video files with it, am I likely top be able to open them in the future? Is there any…
stib
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Why use JPIP if there already exists kdu_transcode?

kdu_transcode provides the functionality of selecting only certain code blocks from a JPEG2000. Why use JPIP instead of just the code of kdu_transcode (+ some open-source cache)?
Lev
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SDK to Encode and Decode JPEG2000 images from C++ code

I am looking for an SDK for (roughly) the following capabilities regarding JPEG2000 files – Decode and encode J2K files. Decode to access individual elements (boxes, marker segments, image stream, etc.) of JPEG2000 images for inspection and…
user1712764
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JPEG2000 encoder/decoder on Android

I want to encode/decode jpeg2000 format on Android. Do you have any suggestions/tutorials to on how to implement it?
user1482868
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which Wavelet is used for Jpeg2000 Image Compression?

which Wavelet is used for Jpeg2000 Image Compression ? I was reading the Book on Wavelet Transform to find out how wavelet works for image compression but there are so many types of Wavelets mentioned in the book and i am confused which one is used…
Sufiyan Ghori
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How to increase the compression ratio of a JPEG2000 file with "avenc_jpeg2000" GStreamer encoder?

I'm using the plugin avenc_jpeg2000, from gst-libav module, combined with videotestsrc and filesink plugins for encoding a raw picture to a JPEG2000 picture: gst-launch-1.0 videotestsrc num-buffers=1 ! avenc_jpeg2000 ! filesink…
qfr.bertin.group
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How to create a lossy JPEG 2000 sequence with FFmpeg

I’d like to convert a movie to a lossy JPEG 2000 sequence with FFmpeg using libopenjpeg. I found -compression_level to control the compression but I‘m looking for a kind of variable bitrate control like -crf. Is this possible?
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