lkml.org 
[lkml]   [2004]   [Aug]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: reverse engineering pwcx
    From
    Date
    On Sat, 2004-08-28 at 12:56, Albert Cahalan wrote:
    > On Sat, 2004-08-28 at 12:25, Lee Revell wrote:
    > > On Sat, 2004-08-28 at 12:17, Albert Cahalan wrote:
    > >> [somebody]
    >
    > > > > The LavaRnd guys examined the pixels on the actual
    > > > > CCD chip. It's 160x120. The 'decompression' is
    > > > > just interpolation.
    > > >
    > > > Don't put much faith in the 160x120 number. Suppose
    > > > that the chip is in a Bayer pattern, with 160x120
    > > > of those. Well, how many pixels is that? Who knows.
    > > > You'd sort of have 160x120, but with double the
    > > > green data. Since green carries most of the luminance
    > > > information, producing a larger image is reasonable.
    > >
    > > Right, as someone else pointed out, this is wrong.
    > >
    > > How do you account for the Slashdot poster's assertion that it's
    > > physically impossible to cram 640 x 480 worth of data down a USB 1.1
    > > pipe?
    >
    > 640x480 uncompressed 24-bit RGB? It doesn't matter.
    >
    > The suggestion of a 4x4 JPEG-like transform seems
    > pretty reasonable. I'd like to see that whitepaper.
    >

    This still can't be called 'True 640 x 480' by any reasonable standard.
    Philips' marketing claims exactly this.

    So far I have not seen any evididence to refute QuantumG's original
    assertion that the reason everyone in the know is being so tight-lipped
    is that releasing source code would prove Philips and/or Logitech guilty
    of false advertising.

    Lee

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 14:05    [W:0.021 / U:1.720 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site