Am 2006-05-31 20:17:34, schrieb H.S.:
> That was really great help. Thank a ton. The problem of identifying an
> image as progressive or not is solved.
I use the "netpbm" package and its tools.
> The problem left is to convert all my current jpegs into progressive
> ones. jpegtran did the job (t
H.S.([EMAIL PROTECTED]) is reported to have said:
> Hi Wayne,
>
> I tried your way and converted all the image with quality 25. You are
> right, I couldn't notice any perceptual difference at normal size. The
> different is noticable only if you magnify the image.
>
> I had a total of 14 images o
Wayne Topa wrote:
> All of the inages on our web site are converted with the 'quality 25'
> option. I find a lot of sites with images that are 100K or more just
> take too long to load. There are still a lot of us that live in the
> sticks and don't have access to anything but slow POT lines.
Wayne Topa wrote:
>>This is a case of compression with a loss in quality. Note that you can
>>still have the new smaller image either as progressive or non-progressive.
>>
>
>
> I don't see that loss in quality tho. At 1280x1024 they look the
> same, to these old eyes anyway, and the savings in
H.S.([EMAIL PROTECTED]) is reported to have said:
> Wayne Topa wrote:
>
> >
>
> But converting a jpeg to progressive somehow has the effect that the
> progressive jpeg file is slightly smaller than the non-progressive one,
> but the client then uses up more RAM to reconstruct the image -- not
>
Wayne Topa wrote:
>
> Having never heard of "a progressive jpeg" I was interested in your
> query, and the answer you received.
>
> I tried out the conversion to "progressive" on some of my large jpegs
> to see if it would help (as I have the same problem you have, dialup).
>
> I used the sug
H.S.([EMAIL PROTECTED]) is reported to have said:
> Olafur Jens Sigurdsson wrote:
>
> > Imagemagick does the trick for you.
> >
> > To see if your files are interlaced or not you can use identify
> > -verbose filename.jpg and search for the Interlace line and if it says
> > None then it isnt a pr
Olafur Jens Sigurdsson wrote:
> Imagemagick does the trick for you.
>
> To see if your files are interlaced or not you can use identify
> -verbose filename.jpg and search for the Interlace line and if it says
> None then it isnt a progressive jpeg and if it says Plane it is.
That was really grea
Þann 2006-05-31, 17:12:36 (-0400) skrifaði H.S.:
>
> Hello,
>
> I have searched google but haven't found an answer I was looking for. I
> want to upload some family pics to share among relatives. Some have
> dialup connections. To facilitate image downloads in their browsers, I
> want to upload p
Hello,
I have searched google but haven't found an answer I was looking for. I
want to upload some family pics to share among relatives. Some have
dialup connections. To facilitate image downloads in their browsers, I
want to upload progressive jpegs. How do I find out if the jpegs I
already have
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