New Avi's Backdrop anime pictures
tokimi
Rev. J.
atleast someone is making quality backdrops..
J.
tokimi <tok...@collapsar.cx> wrote in message
news:050320001717328208%tok...@collapsar.cx...
tokimi
<throb...@nospam.sprynet.com> wrote:
> very cool..
>
> atleast someone is making quality backdrops..
>
> J.
>
>
thank you. those pictures turned out to be a lot more work than i
thought they would be. i'm glad you liked them.
tokimi
Sean Luke
> thank you. those pictures turned out to be a lot more work than i
> thought they would be. i'm glad you liked them.
Porn anime for Avi's Backdrop -- a first, I believe. While I'm not your
audience probably, it's nice to see more people in the Newton picture
community. However, there appear to be a few flaws in the image-conversion
process which you might want to correct on your next pass.
1. Do not use JPEGs as your source file, unless they were compressed with a
very small amount of compression. As can be seen in (warning, bikini)
http://tokimi.collapsar.cx/avi/anime/aika.jpg, you can see the compression
artifacts along sharp changes from light to dark. Use GIFs or TIFF as your
source.
2. You need to find a better conversion algorithm from color/grayscale to
16 grays, one which uses error-diffusion rather than simple thresholding.
Compare the obvious threshold lines on (warning, nude)
http://tokimi.collapsar.cx/avi/adult/stapla.jpg with the error diffused
random dithering at (non-nude)
http://scruffy.cs.umd.edu:8080/seanl/Newton/Phantom/index.html
On the Newton the thresholding looks even more pronounced. If you have a
program which only lets you do thresholding, THROW IT AWAY. :-) It is a
very poor choice for Newton pictures! It makes a *world* of difference.
Anyway, I highly recommend GraphicConverter for the Macintosh (it's free).
To convert the image with proper diffusion in GraphicConverter, you do four
steps:
0. Uncheck "Dither" at
Pciture:Colors:Dither
1. Convert the image to 8-bit grayscale by choosing
Picture:Colors:Grayscale:256 Grays
2. Then convert the image to 4-bit grayscale (16 grays) by choosing
Picture:Colors:Change to 16 Colors (4 Bit)
3. Save out your file as a PICT and convert it into a .pkg
following Avi's instructions.
[BTW, as a side note I've talked with Steve about the fact that Newt's Cape
only does thresholding in its picture conversions, but the person who did
the GIF/JPEG code is busy and can't add Floyd/Steinburg error diffisuion
right now].
Sean
tokimi
<se...@jifsan.cs.umd.edu> wrote:
ok, looks like i need to clarify a few things.
> Porn anime for Avi's Backdrop -- a first, I believe.
thanks for pointing that out.
if you will notice, there are 3 sections to this site, two of which are
not porn. Besides, there was no mention of porn in my original post so
as not to draw attention based solely on it's pornographic content AND
you had fair warning before you clicked on that link.
> While I'm not your audience probably, it's nice to see more people in the Newton picture
> community. However, there appear to be a few flaws in the image-conversion
> process which you might want to correct on your next pass.
>
> 1. Do not use JPEGs as your source file, unless they were compressed with a
> very small amount of compression. As can be seen in (warning, bikini)
> http://tokimi.collapsar.cx/avi/anime/aika.jpg, you can see the compression
> artifacts along sharp changes from light to dark.
i am aware of that.
i cannot help the quality of the pictures i started with. however, the
pictures i used for the actual backdrop images were of much higher
quality than the ones i put on the page to keep the load time down, as
stated on the intro page. the pictures you saw on the web page looked
crappy for a reason. the pictures you see on the web page are not the
source of pictures you will see on your newton, but rather, a
representation.
>
> 2. You need to find a better conversion algorithm from color/grayscale to
> 16 grays, one which uses error-diffusion rather than simple thresholding.
> Compare the obvious threshold lines on (warning, nude)
> http://tokimi.collapsar.cx/avi/adult/stapla.jpg with the error diffused
the source images for the stapla pictures were dithered 256 color
images. again, i can't help how they started out. i thought they turned
out well, considering what i started with, but that's just me.
> random dithering at (non-nude)
> http://scruffy.cs.umd.edu:8080/seanl/Newton/Phantom/index.html
>
> On the Newton the thresholding looks even more pronounced. If you have a
> program which only lets you do thresholding, THROW IT AWAY. :-) It is a
> very poor choice for Newton pictures! It makes a *world* of difference.
> Anyway, I highly recommend GraphicConverter for the Macintosh (it's free).
i did use GraphicConverter, and it is NOT free (no, my copy is not
registered).
i originally made ALL of these pictures for my own personal benefit. i
had some pictures that i liked so i put them on my newton. later, i
decided to share them with the newton community so i reworked some of
them and put some web pages together. if you like them, i'm glad. if
you don't, that's fine. thanks for downloading them anyway.
tokimi
Sean Luke
[I took this off-line with tokimi (I hadn't at all meant to be so harsh in
retrospect, I had a bad day today), but I thought I'd mention one thing in
particular:]
> i did use GraphicConverter, and it is NOT free (no, my copy is not
> registered).
For everyone who uses GraphicConverter: if you don't set things up
right it will not do error-diffusion when converting to grayscale. It's an
easy mistake to make. Here's the steps you should do:
1. Scale your image *first*. This step should be _before_ you
convert to 16-bit grayscale.
2. Do any other preprocessing and cleanup in color.
_Don't_ do it in gray.
3. Turn on error-diffusion with Picture:Colors:Dither *important!*
4. Convert the image directly to 16-bit grayscale with
Picture:Colors:Grayscale:16 Grays
Ignore my previous directions, they also do error-diffusion but converting
straight to 16-grays does a better diffusion job. Also, if you do not turn
on Dither, then converting directly to 16 grays will not do
error-diffusion. If you convert first to 256 grays and then change to "16
colors" like I had said before, it does error-diffusion regardless of
whether or not Dither is on, but doesn't do quite as good a job.
Sean
Sean Luke
Sean?", I've created three Newton-ready grayscale GIF images, each done
with a different GraphicConverter conversion process. The image is the
Apple G4 tower. View them in a web browser that provides at least 16-bit
color.
Good Error Diffusion:
http://scruffy.cs.umd.edu:8080/seanl/temp/G4good.gif
This one was done by turning on Picture:Colors:Dither, then selecting
Picture:Colors:Grayscale:16 Grays
Bad Error Diffusion:
http://scruffy.cs.umd.edu:8080/seanl/temp/G4bad.gif
This one was done by first selecting Picture:Colors:Grayscale:256 Grays,
then selecting Picture:Colors:Change to 16 Colors (4 Bit).
Thresholding (ick):
http://scruffy.cs.umd.edu:8080/seanl/temp/G4ugly.gif
This one was done by *not* turning on Picture:Colors:Dither, then selecting
Picture:Colors:Grayscale:16 Grays. This is also the effect you achieve if
you load the image through Newt's Cape or NetHopper on your Newton, and
save it to a book.
Sean
Rev. J.
by first, getting a PM6100/66dos.. and then loading Graphic Converter.. now,
i can actually try to get some decent backdrops.. this is just too sweet..
i really dig having BOTH a PC and a Mac.. and my Newton 2100u (no doubt!)
the tips are very good.. others should try to make some decent quality
backdrops..
too fun..
J.
Sean Luke <se...@jifsan.cs.umd.edu> wrote in message
news:8a1rls$bj3$2...@cronkite.cs.umd.edu...
Dan
text and an otherwise empty page. Someone help me out, thx,,
Dan
> From: "Rev. J." <throb...@nospam.sprynet.com>
> Organization: http:\\ulc.org
> Newsgroups: comp.sys.newton.misc
> Date: Mon, 6 Mar 2000 03:53:04 -0600
> Subject: Re: New Avi's Backdrop anime pictures
>
> very cool..
>
> atleast someone is making quality backdrops..
>
> J.
>
>
Sean Luke
> Good Error Diffusion:
> http://scruffy.cs.umd.edu:8080/seanl/temp/G4good.gif
> This one was done by turning on Picture:Colors:Dither, then selecting
> Picture:Colors:Grayscale:16 Grays
>
> Bad Error Diffusion:
> http://scruffy.cs.umd.edu:8080/seanl/temp/G4bad.gif
> This one was done by first selecting Picture:Colors:Grayscale:256 Grays,
> then selecting Picture:Colors:Change to 16 Colors (4 Bit).
>
> Thresholding (ick):
> http://scruffy.cs.umd.edu:8080/seanl/temp/G4ugly.gif
> This one was done by *not* turning on Picture:Colors:Dither, then selecting
> Picture:Colors:Grayscale:16 Grays. This is also the effect you achieve if
> you load the image through Newt's Cape or NetHopper on your Newton, and
> save it to a book.
One last mention about thresholding vs. error diffusion. If you're
converting a pen-and-ink drawing or cartoon where there is no gradual
change from color to color, like a South Park picture say, then you may
want to use thresholding. But if you're converting nearly anything else,
especially photographs, oil or watercolor or airbrush art, etc., you
definitely want error diffusion.
Sean