I have been making some manual work in aligning the pictures
Take easily recognizable parts of the picture to compare
I have noticed that I have to move one picture a bit to the right and up
which is relatively easy looking at the results with viewrgb and picking
different indexes to move them along
It is good fun to play with pictures this way
There is quite a bit of noise on the pictures
To get the patterns aligned may also need a bit of turnings as well which is
a bit harder to do
I wonder if there are any tools to do such pattern matching automatically
Also something to smooth out noise and make the patterns stand out better
2006/11/2, Oleg Kobchenko <[EMAIL PROTECTED]>:
There may be different techniques depending on
the goals of the comparison and conditions of
input images, such as
- alignment and "exposure" transformations to match two images
- processing for easy visual identification of diffs
E.g. for visual identification, that will show one
of the images with differences area highlighted
- make sure images align (can be manual visual tool)
- get difference
- get 0,1 bitmap as threshhold of the difference image
- apply some visible filter using the bitmap mask,
such as elevate R and suppress G,B
f(r,g,b) = (r+m*d),(g-m*d),(b-m*d); m={0,1}, d=10 or so
For automated qualitative analysis, there is
a good summary of image operations
http://homepages.inf.ed.ac.uk/rbf/HIPR2/
platimg returns image in hex 0xRRGGBB form, and
most of the operations work on each color component
separately.
--- Björn Helgason <[EMAIL PROTECTED]> wrote:
> I downloaded platimg from
>
> http://olegykj.sourceforge.net/
>
> I ran the test script and could take in my jpg picture and display part
of
> it on the form
> (excellent tools on this page!!)
>
> I am pretty new to this picture scene and I wonder if there are tools
> available to scale the jpg images as well as compare differences between
jpg
> pictures
> Like I have 15 pictures taken of the same object but there are
supposedly
> small differences between them that I do not know about
> Each is 6MB in size
>
> Getting the picture displayed is a major step for me but I have not got
a
> clue as to how to compare them in J and what to do next
>
> --
> Björn Helgason, Verkfræðingur
> Fugl&Fiskur ehf, Þerneyjarsund 23, Box 127
> 801 Grímsnes ,t-póst: [EMAIL PROTECTED]
> Skype: gosiminn, gsm: +3546985532
> Landslags og skrúðgarðagerð, gröfuþjónusta
> http://groups.google.com/group/J-Programming
>
>
> Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari
einfaldleikans
>
> góður kennari getur stigið á tær án þess að glansinn fari af skónum
> /|_ .-----------------------------------.
> ,' .\ / | Með léttri lund verður |
> ,--' _,' | Dagurinn í dag |
> / / | Enn betri en gærdagurinn |
> ( -. | `-----------------------------------'
> | ) | (\_ _/)
> (`-. '--.) (='.'=)
> `. )----' (")_(")
> > ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
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----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
--
Björn Helgason, Verkfræðingur
Fugl&Fiskur ehf, Þerneyjarsund 23, Box 127
801 Grímsnes ,t-póst: [EMAIL PROTECTED]
Skype: gosiminn, gsm: +3546985532
Landslags og skrúðgarðagerð, gröfuþjónusta
http://groups.google.com/group/J-Programming
Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans
góður kennari getur stigið á tær án þess að glansinn fari af skónum
/|_ .-----------------------------------.
,' .\ / | Með léttri lund verður |
,--' _,' | Dagurinn í dag |
/ / | Enn betri en gærdagurinn |
( -. | `-----------------------------------'
| ) | (\_ _/)
(`-. '--.) (='.'=)
`. )----' (")_(")
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
