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Altera_Forum
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18 years ago

JPEG libraries

Hello All,

I am currently working on a project where I have to read image files (JPEG) from a USB and displaying them on the screen. I installed uClinux and I was wondering if you could give me an advice on what libraries to use for the JPEG decoding. Also, could we display the pics using an X window or not?

Thanks.

Bouyaka

7 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    originally posted by hippo@Mar 29 2007, 08:25 PM

    please check the wiki

    http://nioswiki.jot.com/wikihome/operating...ems/framebuffer (http://nioswiki.jot.com/wikihome/operatingsystems/framebuffer)

    if you use the de2 board, you can read the usb disk as mass storage device, and display the jpeg file with nxview on nanox window.

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=22641)

    --- quote end ---

    --- Quote End ---

    Thanks for the prompt answer!! Do you have any good links with information on nxview ?

    Thanks.

    Bouyaka.
  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    originally posted by bouyaka+mar 30 2007, 04:50 pm--><div class='quotetop'>quote (bouyaka @ mar 30 2007, 04:50 pm)</div>

    --- quote start ---

    <!--quotebegin-hippo@Mar 29 2007, 08:25 PM

    please check the wiki

    http://nioswiki.jot.com/wikihome/operating...ems/framebuffer (http://nioswiki.jot.com/wikihome/operatingsystems/framebuffer)

    if you use the de2 board, you can read the usb disk as mass storage device, and display the jpeg file with nxview on nanox window.

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=22641)

    --- quote end ---

    --- Quote End ---

    Thanks for the prompt answer!! Do you have any good links with information on nxview ?

    Thanks.

    Bouyaka.

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=22685)</div>

    [/b]

    --- Quote End ---

    I tried following the instructions from the wiki http://nioswiki.jot.com/wikihome/operating...ems/framebuffer (http://nioswiki.jot.com/wikihome/operatingsystems/framebuffer)

    but I ran into this error when trying to run make in the uClinux-dist/

    arch/nios2nommu/drivers/altfb.c: In function `altfb_probe&#39;:

    arch/nios2nommu/drivers/altfb.c:161: error: `na_vga_controller_0&#39;

    undeclared (first use in this function)

    arch/nios2nommu/drivers/altfb.c:161: error: (Each undeclared

    identifier is reported only once

    arch/nios2nommu/drivers/altfb.c:161: error: for each function it

    appears in.)

    make[2]: *** [arch/nios2nommu/drivers/altfb.o] Error 1

    make[1]: *** [arch/nios2nommu/drivers] Error 2
  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    originally posted by bouyaka@Mar 29 2007, 04:59 PM

    hello all,

    i am currently working on a project where i have to read image files (jpeg) from a usb and displaying them on the screen. i installed uclinux and i was wondering if you could give me an advice on what libraries to use for the jpeg decoding. also, could we display the pics using an x window or not?

    thanks.

    bouyaka

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=22636)

    --- quote end ---

    --- Quote End ---

    Hi, Bouyaka

    I will use USB Camera to read image(JPEG) on DE2 board.

    Can you tall me ,what kind usb camera is your used?

    It&#39;s need porting usb driver?

    Can you teach me?

    thanks

    NiosQ
  • Altera_Forum's avatar
    Altera_Forum
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    --- Quote Start ---

    originally posted by niosq+apr 2 2007, 03:07 am--><div class='quotetop'>quote (niosq @ apr 2 2007, 03:07 am)</div>

    --- quote start ---

    <!--quotebegin-bouyaka@Mar 29 2007, 04:59 PM

    hello all,

    i am currently working on a project where i have to read image files (jpeg) from a usb and displaying them on the screen. i installed uclinux and i was wondering if you could give me an advice on what libraries to use for the jpeg decoding. also, could we display the pics using an x window or not?

    thanks.

    bouyaka

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=22636)

    --- quote end ---

    --- Quote End ---

    Hi, Bouyaka

    I will use USB Camera to read image(JPEG) on DE2 board.

    Can you tall me ,what kind usb camera is your used?

    It&#39;s need porting usb driver?

    Can you teach me?

    thanks

    NiosQ

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=22728)</div>

    [/b]

    --- Quote End ---

    I am using a normal USB storage device (flash drive) where JPEG pictures will be stored.
  • Altera_Forum's avatar
    Altera_Forum
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    nxview is a demo program of nanoX.

    when you enable jpeg support in microwin/nanoX, the libjpeg will be selected.

    I updated the wiki.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor

    --- Quote Start ---

    Hello All,

    I am currently working on a project where I have to read image files (JPEG) from a USB and displaying them on the screen. I installed uClinux and I was wondering if you could give me an advice on what libraries to use for the JPEG decoding. Also, could we display the pics using an X window or not?

    Thanks.

    Bouyaka

    --- Quote End ---

    Hi,Bouyaka, are you succesfull display the JPEG picture using nxview to VGA monitor?? Currently I also work a project same with you, if u succesfull make it can share experience to me? Thanks very much for reply =)