• 0

C# Displaying JPEG2000 file (JP2)


Question

10 answers to this question

Recommended Posts

  • 0

I have know idea (sorry),

a side question:

is JPEG2000 an actual standard yet? I was following the movement in 2001, but it seems that development dropped off. The standard seem to be a great improvement on the old jpeg standard. Does photoshop CS2 support JP2 ?

  • 0

JPEG 2000 is a new image coding system that uses state-of-the-art compression techniques based on wavelet technology. Visit this site for more details: http://www.jpeg.org/jpeg2000. And yet, it include motion JPEG 2000 which is similar to MPEG files. I dont think photoshop CS2 support JP2, maybe soon. And that is why I'm asking someone else to help me find the source for my application. Specially the encoder/decoder thing... :)

Amaw man siguro ka!

  • 0

Exactly! And that is why I'm asking anyone who knows about it. I know it's kinda hard for someone who will intrust his/her knowledge to someone else whom he/she don't know. But what make sense is, you were able to share it with others and make them use for it. That makes us "No Man Is An Island"! :)

  • 0

Found this in the newsgroup microsoft.public.dotnet.framework.drawing: (February 2005 info)

  Quote
Sorry to discourage you but I haven't seen anything that does JPEG2000 under

.NET yet.

It's certainly a frequently asked question.

--

Bob Powell [MVP]

Visual C#, System.Drawing

However, I found this via a Google search:

  Quote
ImagXpress™ JPEG2000 Add On

.NET, COM & VCL Interface to JPEG2000

http://www.pegasusimaging.com/ixjpeg2000.htm

ImagXpress JPEG2000 Add On is $699 for a single development license. This product may also involve additional licensing.

:x

Would be cool to have though. I just wish the format was open source and license free. Just check out the image sample in the above link for a comparison on the same file size. A cool thing about JPEG2000 is that you can also tell it to "compress an image to 80K" and it will do that, setting compression as necessary. :) It has the regular method of "compress at 80% quality" too. It also has a lossless compression mode, and even supports transparency / alpha channels, EXIF metadata, and more!

  • 0

Sadly, it's a hugely patented area. Basically it uses whats called a wavelet transform which is kinda like the fourier transform. It's pretty well known math especially to ANYONE in the sciences or engineering but patenting math is what software patents are all about. Often you'll find devs ignore it or just choose a slower/crappier hackish way of getting around the precise wording.

You'll have to use P/Invoke and build a dll.

http://www.ece.uvic.ca/~mdadams/jasper/

ps: go vancouver/island!!!

  • 0

:yes: Is that so, actually I made my own analysis of this JPEG2000 file and I came up to this information I get out of this file:

(Motion JPEG2000 file analysis)

File Offset = 0x0000000000000000 (0)

Normal Box Size = 0x0000000C (12)

Box Type = jP (Level 1) => JPEG2000 family signature

---------------------------------------

File Offset = 0x000000000000000C (12)

Normal Box Size = 0x00000014 (20)

Box Type = ftyp (Level 1) => File type

Major Brand = 0x6D6A7032 (1835692082)

Minor Version = 0x00000000 (0)

Compatible Version = 0x6D6A7032 (1835692082)

---------------------------------------

File Offset = 0x0000000000000020 (32)

Large Box Size = 0x0000000001E85A71 (32004721)

Box Type = mdat (Level 1) => Media Data

(Data) = Main data exists here

---------------------------------------

File Offset = 0x0000000001E85A91 (32004753)

Normal Box Size = 0x00000529 (1321)

Box Type = moov (Level 1) => Movie

...

...

...

My problem now is on how to manipulate the real codec thing, so that I can create an Image object that will handle a JPEG2000 file. :(

Would it be possible if I will make it without the lib of JPEG2000 or any reliable source related to JPEG2000 which will help me develop this thing? :rolleyes:

ps: I never been to vancouver/island, or anywhere in canada. I'm actually planning to work in canada or somewhere in the US. Is there someone who can help me find a job related to my work now? (Software Developer)

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • Been using Linux for the last 15-16 years, and I don't agree to any of this.. Come on, guys..
    • Crucial 8TB X10 2100 MB/s USB-C (3.2) external SSD is priced lowest ever at just $440 by Sayan Sen External SSDs are great as their portability makes them quite convenient. If you are shopping for one, then Micron has a deal that may just be right for you. The company's Crucial X10 external SSDs are currently on sale for their lowest ever prices (purchase links down below). What is interesting about the Pro X9 and X10 models is that they are based on TLC or triple-level cell NAND compared to QLC or quad-level on the X6 and X8 external SSDs, making them higher endurance and better for longer sustained reads and writes. Unfortunately, Crucial does not specifically state the kind of NAND flash the X10 has, though, from its three-year warranty, as opposed to five years on the Pro models, it can be said that the drive is QLC. As such it is not the ideal drive for constant data reads and writes, but you can certainly use it fairly often. Speaking of reads and writes, Crucial promises up to 2100 MB/s sequential reads. To enable such speeds, the SSD supports USB 3.2 Gen-2 2x2 interface and comes with a Type-C to Type-C USB cable in the box. But it is also backward compatible with USB 3.2 Gen 2/USB 3.2 Gen1/USB 3.1 Gen1/ USB 3.0 (5Gb/s), so this would mean lower speeds. In terms of durability, the X10 Pro and X9 Pro pack IP65 water and dust resistance, and the firm claims that the drive's drop-proof durability is up to 9.8 feet or about 3 meters. Get the Crucial X10 at the link below: Crucial X10 8TB Portable SSD, Up to 2,100MB/s, USB 3.2 USB-C, Compatible with Windows, Mac & Android, Blue - CT8000X10SSD9-02: $439.99 (Amazon US first-party seller) This Amazon deal is US-specific and not available in other regions unless specified. If you don't like it or want to look at more options, check out the Amazon US deals page here. Get Prime (SNAP), Prime Video, Audible Plus or Kindle / Music Unlimited. Free for 30 days. As an Amazon Associate, we earn from qualifying purchases.
  • Recent Achievements

    • Conversation Starter
      johnwin1 earned a badge
      Conversation Starter
    • One Month Later
      Marwin earned a badge
      One Month Later
    • One Year In
      fred8615 earned a badge
      One Year In
    • Week One Done
      Jim Dugan earned a badge
      Week One Done
    • Week One Done
      Adam Todd earned a badge
      Week One Done
  • Popular Contributors

    1. 1
      +primortal
      215
    2. 2
      snowy owl
      156
    3. 3
      ATLien_0
      134
    4. 4
      Xenon
      127
    5. 5
      +FloatingFatMan
      117
  • Tell a friend

    Love Neowin? Tell a friend!