Perform a scale modification on a matrix (Multi Resolution Analysis).
[zo] = NARVAL_IP_MRA(im,z,o)
matrix.
scale factor.
mode.
output matrix.
NARVAL_IP_MRA performs the following scale modification on the matrix im of size (nxm) (Multi Resolution Analysis). The output matrix zo size is z times smaller than the one of im. There are four different modes: o=1 : mean, o=2 : max, o=3 : min and o=4 : median. Thus a single value is calculated for each non-overlapping block of size (n/z,m/z) in respect with the defined mode.
dt=getdate(); seed=dt(10); rand('seed',seed);//initialization of the random values generator no=4;//quantity of obstacles (rectangle) L=1000;//squared area side hm=100;//minimal height hM=250;//maximal height wm=100;//minimal width wM=250;//maximal width Al=[0 %pi/2 %pi -%pi/2];//available angles for obstacles [Xs,Ys,X,Y,H,W,A]=NARVAL_IP_RectObstacles(no,L,hm,hM,wm,wM);//generation of obstacles [P]=NARVAL_IP_PotentialRot(X,Y,H,W,A,L);//generation of obstacle matrix z=10;//zoom factor o=2;// 1=mean, 2=max, 3=min, 4=median Pz=NARVAL_IP_MRA(P,z,o);//application of NARVAL_IP_MRA [Pzx,Pzy]=size(Pz);//image size w1=1;//window index scf(w1); clf(w1); grayplot(1:L,1:L,P);//graph visualization xset("colormap",graycolormap(128)); w2=2;//window index scf(w2); clf(w2); grayplot(1:Pzx,1:Pzy,Pz);//graph visualization xset("colormap",graycolormap(128)); | ![]() | ![]() |
Dr. Foued Melakessou
Research Associate
Interdisciplinary Centre for Security, Reliability and Trust
Room F106
University of Luxembourg
6, rue Coudenhove Kalergi
L-1359 Luxembourg-Kirchberg
E-mail: foued.melakessou@uni.lu
Tel: (+352) 46 66 44 5346