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From: us on 2 Apr 2010 17:33 "Elie Matta" <matta.elie(a)hotmail.com> wrote in message <hp4jcq$23b$1(a)fred.mathworks.com>... > hey all, > > Is there any other way to convert char to double other than str2num that is too slow? > I have a graylevel image that i want to convert to a binary sequence. > > load woman; > imdec = reshape(X,256*256,1); > imbin= dec2bin(imdec,8); > msg = reshape(imbin',256*256*8,1); > > but msg is char if i use > msg2=str2num(msg); > it takes too long > and if i use > msg2=str2double(msg) > it gives me a 1x1 double inf > > is there any other way ?? > thanks in advance. > > Elie rather than just showing load woman; which (most likely) no CSSMer has on the disk, show CSSM an example of your input X... us
From: Elie Matta on 2 Apr 2010 18:03 X is the image that u get when u use load woman its a double array i want to finally transform it to a one column n line binary sequence that is double and not char. the way i used reshape it gave me a char answer. dpb <none(a)non.net> wrote in message <hp5ia0$t44$1(a)news.eternal-september.org>... > Elie Matta wrote: > > hey all, > > > > Is there any other way to convert char to double other than str2num that > > is too slow? > > I have a graylevel image that i want to convert to a binary sequence. > > > > load woman; > > imdec = reshape(X,256*256,1); > > imbin= dec2bin(imdec,8); > > msg = reshape(imbin',256*256*8,1); > > > > but msg is char if i use msg2=str2num(msg); it takes too long and if i use > > msg2=str2double(msg) > > it gives me a 1x1 double inf > > is there any other way ?? > ... > OK, I'm not much into image processing so you confused me (easily done, > undoubtedly)... > > First, what is X (double, uintN, ...)? > > What is the form of binary sequence wanted to be and what's the > definition of who's 0/1? > > --
From: Elie Matta on 2 Apr 2010 18:05 X could be any gray level image of type double i used load woman just as an example. btw what is CSSM? "us " <us(a)neurol.unizh.ch> wrote in message <hp5nqh$j7m$1(a)fred.mathworks.com>... > "Elie Matta" <matta.elie(a)hotmail.com> wrote in message <hp4jcq$23b$1(a)fred.mathworks.com>... > > hey all, > > > > Is there any other way to convert char to double other than str2num that is too slow? > > I have a graylevel image that i want to convert to a binary sequence. > > > > load woman; > > imdec = reshape(X,256*256,1); > > imbin= dec2bin(imdec,8); > > msg = reshape(imbin',256*256*8,1); > > > > but msg is char if i use > > msg2=str2num(msg); > > it takes too long > > and if i use > > msg2=str2double(msg) > > it gives me a 1x1 double inf > > > > is there any other way ?? > > thanks in advance. > > > > Elie > > rather than just showing > load woman; > which (most likely) no CSSMer has on the disk, > show CSSM an example of your input X... > > us
From: James Tursa on 2 Apr 2010 18:38
"Elie Matta" <matta.elie(a)hotmail.com> wrote in message <hp5pn2$ffe$1(a)fred.mathworks.com>... > > btw what is CSSM? This newsgroup: comp.soft-sys.matlab |