Re: Convert Binary Image to Column Vector

*To*: mathgroup at smc.vnet.net*Subject*: [mg83992] Re: Convert Binary Image to Column Vector*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Thu, 6 Dec 2007 02:46:27 -0500 (EST)*Organization*: Uni Leipzig*References*: <fj65hr$fp1$1@smc.vnet.net>*Reply-to*: kuska at informatik.uni-leipzig.de

Hi, What is a binary image for you ? something like img=Graphics[Raster[{{0, 1}, {1, 0}}, {{0, 0}, {2, 2}}, {0, 1}, ColorFunction -> GrayLevel], AspectRatio -> Automatic] ?? or something like bm={{0, 1}, {1, 0}} .. Since Flatten[bm] will make a vector out of a matrix as well as Flatten[img[[1,1]]] it is not clear what ordering you perfer, i.e. should in bm[[j,i]] the index i run first or the index j. This is what you change with Transpose[]. Regards Jens Tara.Ann.Lorenz at gmail.com wrote: > Can a 30x30 binary image be converted directly into a column vector of > 900 components in Mathematica? Or must the image first be put into > matrix form? I am using the command: > Flatten@Transpose@t1, where t1 is my binary image, and it seems to > give me a vector but I'm not sure if it's the one that I desire. > > If I first convert my image into matrix form and define my matrix as > "m" and then use this command, > Flatten@Transpose@m, then I get an output of "Transpose[...]" and my > 30 x 30 matrix is explicitly written within the Transpose brackets. > This does not provide me a column vector with 900 components, which is > what I am looking for. > > Any thoughts? > > Thanks. >