Matlab

content based image retrieval
Gooday, i am doin my masters project on using color features for content based image retrieval and as i have no previous knowledge of image processing i am very confused on the direction to take. can i pls find sum1 to put me through, i want to know how to use matlab to calculate color histograms and to implement multi... 28 Jul 2010 12:57

Question about minimization/optimization problem
Hi, I'm looking to solve a problem for work, where we use Matlab for some applications. The problem I need to solve is to minimize the sum f(x1) + f(x2) + .... + f(xn) where: x1+a < x2 x2+b < x3 .. .. etc ( where the x's are always increasing and separated by a set of constant spacings, x_i + c_i < x_... 23 Jul 2010 11:23

uisave Equivalent for Figures
I think "imsave" is what you're looking for: http://www.mathworks.de/access/helpdesk/help/toolbox/images/imsave.html "Kyle Coogan" <coogs08(a)gmail.com> wrote in message <hqq8qs$e2e$1(a)fred.mathworks.com>... I'm looking for a way to get a user interface save dialog identical to the one displayed when using 'uisave'... 21 Jul 2010 19:07

Multiple figure windows
I have made a couple programs that automatically graph their results in a figure window (Figure1). When I run a new program, the old figure is deleted and replaced by the new one, which is also called Figure1. I am wondering if there is a way to change the settings so that the old figure window isn't deleted when the... 21 Jul 2010 18:01

custom legend graphics
I have written a modified version of quiver that is more suitable for my work. The plotting works exactly as I want it to, but I use multiple "line" objects, which show up as normal line objects when I create a legend. How can I define custom graphics for the legend entries? I am about to delve into the code in @spe... 22 Jul 2010 11:24

help with retrieving information about pixels
Hi All, Here is my problem.. I have a shape file and an image file. I am overlaying the shapefile on the imagefile and am trying to retrive the pixel values from the image. I need to select a few points on the image whose pixel values need to be stored in a vector. Can anyone suggest any matlab functions for d... 21 Jul 2010 19:07

find roots on uqtaion
Hi everyone, I would be grateful if you could help me with this basic question as I am very new to MATLAB. I need to find all the roots of some equation in the interval [o, pi], so I wrote the code below and it does work fine and give the right result, but the problem is that I need to find all the roots in the i... 22 Jul 2010 10:18

Translate matrix up and down spatially
Hello All, I want to translate a matrix spatially up and down.The following code worked for translating the matrix right and left but I am stuck with doing the up and down translation.Kindly help. i=1; fid = fopen('Src4Det5.bin','r+'); a = fread(fid,'double'); a=reshape(a,120,120); figure,imagesc(a); a=reshape... 21 Jul 2010 19:07

Colorbar not drawing correctly
Hi, I've been having issues with drawing my color bar. Everytime it goes off the screen and I can see the very bottom of it when the location is set to 'EastOutside'. Any other location the bar doesn't show up. Here is my code: ActMat = Heatmap(ACTMatrix, 'RowLabels', 0:5:row, 'ColumnLabels', 1:1:columns,... ... 21 Jul 2010 18:01

A colorbar does not match with subplots
"Edoardo" <speedo77(a)email.it> wrote in message <gg41lp$1d0$1(a)fred.mathworks.com>... I want to plot a "heatmap" of four matrices A, B, C, D using the imagesc and arranginf them in a 4x1 subplot subplot(4,1,1) imagesc(A) subplot(4,1,2) imagesc(B) subplot(4,1,3) imagesc(C) subplot(... 21 Jul 2010 18:01