Lets say I use different methods to find the point and the correct answer should be 328 363
Even if the majority are correct or close to it the mean may not be a good answer a=.328 364;127 478;159 1;328 363;327 365;328 362 5%~+/>a 319.4 386.6 Any suggestions to get a better approximation? 2007/3/15, Björn Helgason <[EMAIL PROTECTED]>:
I am trying different sizes of the kern and different filters. I created a form to show the images and different filtering and various results of finding the object. I try it out with finding patterns equal to different numbers and combinations of numbers as well as the actual kern without filter. It takes time to do the manual checking to see what settings give best results and are accurate. 2007/3/14, Oleg Kobchenko <[EMAIL PROTECTED] >: > > The listed image formats should not produce any > difference since they all are lossless compressions. > You can verify creating images in different formats, > loading in J and then subtracting the values. > > Regarding image recognition, although the simple difference minimum > method may work, it is not very stable and depends on > accuracy of defining the kernel and the chosen threshold, > which is different for every instance. > > It would be nice to see how other methods fair, > such as cross-correlation, as listed by Devon McCormick > > http://www.jsoftware.com/pipermail/general/2007-March/029123.html > > You can go iteratively, tweaking a working algorithm > with different ideas to see what's improving. > For example, I like the idea of normalization (first link) > http://www.owlnet.rice.edu/~elec431/projects96/pictomaniacs/previous.html > > <http://www.owlnet.rice.edu/%7Eelec431/projects96/pictomaniacs/previous.html> > > You can apply it to the method you use now to see if it will > eliminate the mismatch. > > > --- Bj�rn Helgason <[EMAIL PROTECTED]> wrote: > > > When extracting an image to work with from a Dicom file I have three > options > > > > dcm2pnm - Convert DICOM images to PPM/PGM, PNG, TIFF or BMP > > > > +obt --write-24-bit-bmp > > write 24-bit truecolor BMP > > > > +ot --write-tiff > > write 8-bit (monochrome) or 24-bit (color) TIFF > > > > +on --write-png > > write 8-bit (monochrome) or 24-bit (color) PNG > > > > > > I have up to now used bmp and am reasonably happy with the results. > > > > I am wondering if the other forms TIFF or PNG would give me better > results. > > Would I need different technique to find the object I am looking for > in the > > image? > > > > The method Oleg sent in earlier finds the object most of the time in > the BMP > > images. > > Actually only found one image so far where it missed the object and > gave > > another fairly similar looking location. > > > > > ____________________________________________________________________________________ > > We won't tell. Get more on shows you hate to love > (and love to hate): Yahoo! TV's Guilty Pleasures list. > http://tv.yahoo.com/collections/265 > ---------------------------------------------------------------------- > 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 | ( -. | `-----------------------------------' | ) | (\_ _/) (`-. '--.) (='.'=) `. )----' (")_(")
-- 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 | ( -. | `-----------------------------------' | ) | (\_ _/) (`-. '--.) (='.'=) `. )----' (")_(")
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