COMPGROUPS.NET | Search | Post Question | Groups | Stream | About | Register
scc.wwl (52) 25 Articles, 27 Replies, 52 Points

Since 5/31/2012 12:45:29 AM, scc.wwl has written 25 articles and participated in 27 conversations.
scc.wwl signature:
scc.wwl

scc.wwl's articles:
 Items(25) /3 Next >> Last >| The mixing formula of RGB 6 14 (1/14/2013 12:29:06 PM) comp.soft-sys.matlabHi, all I am trying to interpret RGB image format. Currently, I read the .bmp image with Matlab, and I can see it three layers of red, green, and blue. But when I try to composite the layers to recover the o...Wenlong How to get binary representation of a decimal number 1 5 (11/30/2012 10:43:08 PM) comp.soft-sys.matlabHi, all I am looking for a method that can convert a decimal number to binary vector. I know there are many answers that I can google it, but seems there's nothing fits my problem. I need to convert a dec...Wenlong Is there any difference between the results of PCA and SVD? 0 9 (8/24/2012 1:01:07 PM) comp.soft-sys.matlabHi, all I am working on singular value decomposition (SVD) and principal component analysis (PCA). I use these methods to analyse a same dataset. What I do is mean center the dataset first, and then input...Wenlong Out of memory problem #14 5 39 (7/25/2012 2:44:09 PM) comp.soft-sys.matlabHi, all I've got no response from my last question, so I'd like to post it again and describe it in details. I have a [15000 x 300] matrix A, and I'd like to carry out a matrix multiplication A*A'. Mat...Wenlong How to solve out of memory problem? 2 39 (7/25/2012 11:01:08 AM) comp.soft-sys.matlabHi, all I am using Matlab 7.0 to do matices multiplication. My matrix A is 15k by 300. When I do A*A', the matlab pops an out of memory error. Is there any method to go around this problem? Many thank...Wenlong Does higher order moments means more attention to local static property? 0 24 (7/3/2012 12:09:08 PM) comp.soft-sys.matlabDear all, I am currently looking into few static analyse algorithms. I noticed that they are analysing with different order moments or cumulants to analyse the data. I guess it is because these algorithms ar...Wenlong How to calculate an irregular shape area? 1 137 (6/22/2012 9:05:07 PM) comp.soft-sys.matlabDear all, I have a shape model in 3D space. I project it onto a 2D plane. Now I have to calculate the area of its projection area. Since the area is irregular, how can I calculate it? Is there any method in ...Wenlong What does uncorrelatedness and independence imply? 4 42 (6/15/2012 4:44:07 PM) comp.soft-sys.matlabDear all, I'm currently reading papers of statistical modelling. I encountered with the concepts of uncorrelatedness and independence. I understand the definitioins, but I am wondering what are the real effe...Wenlong How to apply kernel canonical correlation to practical data? 1 41 (5/25/2012 4:14:13 PM) comp.soft-sys.matlabDear all, I am currently looking into Kernel Canonical Correlation Analysis (KCCA). I have a set of images with m pixels. There are two different metrics of these pixels, intensity and norm. I'd like...Wenlong What is the difference between graylevel image and intensity normalized image? 1 44 (5/8/2012 1:12:07 PM) comp.soft-sys.matlabDear all I have gray level images and I'd like to normalize them by intensity before next stage process. These gray level images are converted from RGB images by rgb2gray(). The pixel value varies between 0 an...Wenlong

scc.wwl's replies:
 Items(11) /2 Next >> Last >| The mixing formula of RGB 6 14 (1/14/2013 12:29:06 PM) comp.soft-sys.matlabHi, all I am trying to interpret RGB image format. Currently, I read the .bmp image with Matlab, and I can see it three layers of red, green, and blue. But when I try to composite the layers to recover the o...scc.wwl (52) Projection from orhtogonal space to non orthogonal space 6 42 (3/2/2012 12:53:35 PM) comp.soft-sys.matlabDear all, I'm currently encountered with a projection problem. I have a n-dimensional orthogonal space A and a n-dimensional non orthogonal space B. I want to project a data point P from A into B. How can I ac...scc.wwl (52) Why principal components are not orthogonal #2 4 35 (3/6/2012 12:19:12 PM) comp.soft-sys.matlabDear all I am trying to write a PCA(principal component analysis) with matlab. I have a 300 by 15k data matrix A which is mean centered. I calculate the covariance matrix C in two approaches. The first one is...scc.wwl (52) Coordinates Transformation between non orthogonal spaces 30 32 (3/6/2012 12:40:12 PM) comp.soft-sys.matlabDear all I have two non orthogonal spaces A and B difined by two sets of vectors. I take a point P in space A. How can I calculate its coordinates in space B? I'll be extremly appreciate for your kindly help....scc.wwl (52) Gray level image normalization 3 45 (4/13/2012 9:03:25 PM) comp.soft-sys.matlabDear all, I have a 637x577 gray-level image. How can I normalize it by intensity? Thank you very much. I do extremely appretiate your help. Best wishes Wenlong ...scc.wwl (52) How to visualize a depth map? 7 70 (4/14/2012 8:49:07 PM) comp.soft-sys.matlabDear all, Can I know how to visualize a depth map? By visualize, I mean to draw an image with black backgrounds and white objects. For example, like the images at http://www.dofpro.com/cgigallery.htm where ill...scc.wwl (52) Where is TriScatteredInterp? 2 64 (4/16/2012 10:43:06 AM) comp.soft-sys.matlabDear all, I am using Matlab Version 7.1.0.246(R14) Service Pack 3. Can I know where is the location of function TriScatteredInterp? Many thanks. Regards Long ...scc.wwl (52) How to cut the margin of an image? 3 63 (4/17/2012 10:09:06 AM) comp.soft-sys.matlabDear all, I am trying to cut the margin of an image. The image is create from a 3D face model. What I want to achieve is to make the edges of the image just next to the contour of the face. Is there any way t...scc.wwl (52) What does uncorrelatedness and independence imply? 4 42 (6/15/2012 4:44:07 PM) comp.soft-sys.matlabDear all, I'm currently reading papers of statistical modelling. I encountered with the concepts of uncorrelatedness and independence. I understand the definitioins, but I am wondering what are the real effe...scc.wwl (52) Out of memory problem #14 5 39 (7/25/2012 2:44:09 PM) comp.soft-sys.matlabHi, all I've got no response from my last question, so I'd like to post it again and describe it in details. I have a [15000 x 300] matrix A, and I'd like to carry out a matrix multiplication A*A'. Mat...scc.wwl (52)