From: Wolfgang Moser (womo_at_news.trikaliotis.net)
Date: 2008-05-24 00:32:45
Hello Micha,
Michael Huth schrieb:
> Ok I made them available under:
thanks a lot, got'em all without any packing errors.
> Skip this if you don't want a short introduction how to stitch rows
> together with ptgui.
Thanks for your explanations. In fact I now did
download the demo version of PTGUI (not Pro) and
tried to use it. I did not follow your explanation
exactly, but tried to discover features and
options on my own.
Well, I chose "tele lens" also but changed focal
length to 10000. Since I did not select images of
one row only, but a set of 2x3 pieces, the
automatic aligning went not so good and I was
asked to set control points manually.
I did this a while, created a picture with
luminance jumps between stitched parts and decided
to take some pictures that were edge-alpha-blended
before. With these, the stitching tool did not
work well and a gave up using the tool (for now).
Did you know that Photoshop also contains some
basic stitching?
Menu->File->Automation->Photomerge
But this also doesn't work so well, and jerks,
when using pictures with alpha channel information
(transparency).
So I went the route that I tested some times ago.
I preprocessed all pictures with these steps:
1. I created a luminance correction picture and
saved it as: Aufhellung_unten.psd
2. I got my recently created Edge-Alpha-Blending
picture: Edge-Alpha-Blending-Wide.psd
3. I created an action set: VIC-II-Stitching.atn
which does the following:
a) Assume a picture of size 2048x1536 open
b) Load and copy Aufhellung_unten.psd
c) Close Aufhellung_unten.psd
d) Copy the buffer as new layer on the
opened picture
e) Adjust the new layer as luminance
correction (overlay)
f) Load/copy Edge-Alpha-Blending-Wide.psd
c) Close Edge-Alpha-Blending-Wide.psd
d) Copy the buffer as new layer on the
opened picture
e) Adjust the new layer as weak cut-off
with 30% transparency
f) Combine all visible layers to one
g) Save the image as TIFF without layers,
but additional alpha channel
Find the pictures as well as the action set in
this file:
http://d81.de/shared/vic-ii/Luma+Edge-Alpha-Blending.zip
I then took 2x3 of these TIFFs into Photoshop
again and started puzzling as done before. By
first selecting difference merge for all layers
(sometimes XOR), manual stitch adjusting was
made more simple. Finally I gave all layers a
luminance blend again. Due to the edge alpha
blending of all pieces it was of no (big)
difference, if luminance blending or normal
layer mixing was used.
Finally all layers were reduced to the
background, the image size reduced a bit and
the picture saved as HQ jpeg:
http://d81.de/shared/vic-ii/1012-1214.jpg
What do you think?
> I can take shots of chips now and then. I also got the request to do
> this for a SID recently.
Yeah, but it is really hard to find a SID in
ceramic package.
I just wanted to ask, _if_ I should find some
other ceramic packaged 65xx chip sometime.
Once I have got a 6569, but it got damaged
somehow and I threw it away, when I was a kid.
> Since my time is limited to 24h a day, I can't push this too much.
Of course we all should know where the limits
of our hobby are set to.
> So you might want to discuss how important it would be to map the die of
> a specific chip, not only for a 'nice to have' cause but also if there
> might be some real information gain in taking a look at the circuits.
To be honest, for me your DIE pictures are
nothing more than nice to have pictures. I'm
really looking out for some printing service
(copy shop) that are able to produce colored
A2, A1 or A0 pictures, maybe laminated as you
already asked for. Today I saw some
advertising from our local copy shop. It seems
I have to spend a visit there ;-)
> Still for the VIC2 images I think it is in the 'nice to have' area, or
> did someone discovered something new or clarified some assumption?
> Maybe put up some priority list.
>
> Another thing is to make the data available. I'am still not sure after
> how many Gigs my provider will complain, but I would like to see
> everything on a more official server.
> Could be connected to a Wiki to add information...
Hmmm, once there was Funet.FI, which is now
backed at zimmers.net. While Funet.FI is a
very big european FTP/rsync mirror server with
lot's of Linux related traffic, I doubt that
this holds true for zimmers.net, too. What do
you think, Bo?
Nevertheless, I'm so grateful that you made
these DIE shot, even if it does take years once
a addicted microelectronics engineer discovers
these for analysis.
Womo
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