如何只用小波变换的水平系数重建图像?
How to re-construct an image with just the horizontal co-efficient of wavelet transform?
我正在尝试仅使用平稳小波变换的水平系数重建输入图像。
[A,H,V,D ] = swt2(x,1,'sym4');
A = 0; V = 0; D = 0; %i am setting other co-efficents to zero since i am only intersted in the values of H %
Y = iswt2(A,H,V,D,'sym4') ; %this gives the following error below%
Error in iswt2/reconsLOC
(line 153)
ca(sR,sC)
,ch(sR,sC,k)
,cv(sR,sC,k)
,cd(sR,sC,k)
, ...
Error in iswt2
(line 122) a = reconsLOC(a,h,v,d);
我该如何解决这个问题?
您省略了错误消息的第一行,这给出了问题所在的线索:
Index exceeds matrix dimensions.
问题是您不能只将矩阵设置为标量 0
,您必须将 整个矩阵 设置为零,这样它仍然大小与 H
相同。这将起作用:
A(:) = 0; % Fills every element of A with zero
V(:) = 0;
D(:) = 0;
Y = iswt2(A, H, V, D, 'sym4');
我正在尝试仅使用平稳小波变换的水平系数重建输入图像。
[A,H,V,D ] = swt2(x,1,'sym4');
A = 0; V = 0; D = 0; %i am setting other co-efficents to zero since i am only intersted in the values of H %
Y = iswt2(A,H,V,D,'sym4') ; %this gives the following error below%
Error in
iswt2/reconsLOC
(line 153)ca(sR,sC)
,ch(sR,sC,k)
,cv(sR,sC,k)
,cd(sR,sC,k)
, ...
Error iniswt2
(line 122)a = reconsLOC(a,h,v,d);
我该如何解决这个问题?
您省略了错误消息的第一行,这给出了问题所在的线索:
Index exceeds matrix dimensions.
问题是您不能只将矩阵设置为标量 0
,您必须将 整个矩阵 设置为零,这样它仍然大小与 H
相同。这将起作用:
A(:) = 0; % Fills every element of A with zero
V(:) = 0;
D(:) = 0;
Y = iswt2(A, H, V, D, 'sym4');