You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
2.9 KiB
Matlab
104 lines
2.9 KiB
Matlab
function V1_cross_orient_spatial_freq
|
|
crop=0;
|
|
spatial_freq=1./[20,12,8,6,4,3,2,1.5];
|
|
mask_wavels=1./spatial_freq;
|
|
grating_wavel=6;
|
|
patch_diam=14;
|
|
image_size=51;
|
|
|
|
iterations=12;
|
|
phase=0;
|
|
node=1;
|
|
|
|
[wFFon,wFFoff]=dim_conv_V1_filter_definitions;
|
|
|
|
clf
|
|
for test=1:2
|
|
i=0;
|
|
for mw=mask_wavels
|
|
i=i+1;
|
|
fprintf(1,'.%i.',i);
|
|
if test==1 %cross-orientation simulus
|
|
Ig=image_cross_orientation_sine(patch_diam,grating_wavel,mw,0,90, ...
|
|
phase,phase,0.1,0.25);
|
|
else %spatial freq tuning stimulus
|
|
Ig=image_square_grating(patch_diam,0,mw,0,phase,0.1);
|
|
end
|
|
%pad image so that they are the same size regardless of patch diameter
|
|
I=zeros(image_size)+0.5;
|
|
[a,b]=size(I);
|
|
[ag,bg]=size(Ig);
|
|
I(ceil(a/2)-floor(ag/2):ceil(a/2)+floor(ag/2),ceil(b/2)-floor(bg/2):ceil(b/2)+floor(bg/2))=Ig;
|
|
[Ion,Ioff]=preprocess_image(I);
|
|
[a,b]=size(I);
|
|
%plot original image
|
|
maxsubplot(3,length(mask_wavels),i),
|
|
imagesc(I(:,:),[0,1]);
|
|
axis('equal','tight'), set(gca,'XTick',[],'YTick',[],'FontSize',11);
|
|
drawnow;
|
|
|
|
%initial response without competition
|
|
[y,ron,roff,eon,eoff,Y]=dim_conv_on_and_off(wFFon,wFFoff,Ion,Ioff,1);
|
|
y=mean(Y,4);
|
|
maxsubplot(3,length(mask_wavels),i+length(mask_wavels)),
|
|
imagesc(y(crop+1:a-crop,crop+1:b-crop,node),[0,0.01]),
|
|
axis('equal','tight'), set(gca,'XTick',[],'YTick',[],'FontSize',11);
|
|
drawnow;
|
|
|
|
%perform competition
|
|
[y,ron,roff,eon,eoff,Y]=dim_conv_on_and_off(wFFon,wFFoff,Ion,Ioff,iterations);
|
|
y=mean(Y,4);
|
|
maxsubplot(3,length(mask_wavels),i+2*length(mask_wavels)),
|
|
imagesc(y(crop+1:a-crop,crop+1:b-crop,node),[0,0.01]),
|
|
axis('equal','tight'), set(gca,'XTick',[],'YTick',[],'FontSize',11);
|
|
drawnow;
|
|
|
|
sc(test,i)=y(ceil(a/2),ceil(b/2),node);
|
|
end
|
|
end
|
|
|
|
figure(1),clf
|
|
subplot(3,2,[4,6])
|
|
semilogx(spatial_freq,sc(1,:),'r-o','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','w');
|
|
hold on
|
|
semilogx([0.01,1],sc(2,find(mask_wavels==6)).*[1,1],'b-','LineWidth',2);
|
|
axis([0.035,1,0,0.0035])
|
|
set(gca,'XTick',[0.05,0.2,0.5],'YTick',[0:0.001:0.012],'FontSize',20,'Box','off');
|
|
xlabel('Spatial Freq. (cycles/pixel)'),ylabel('Response')
|
|
|
|
figure(2),clf
|
|
maxsubplot(5,2,8)
|
|
patchscale=5;
|
|
patch_diam=patch_diam*patchscale;
|
|
spacingh=patch_diam*2;
|
|
spacingv=patch_diam*1.25;
|
|
%L=zeros(patch_diam+spacingv+1,2*spacingh+patch_diam+1)+0.5;
|
|
L=zeros(patch_diam+1,2*spacingh+patch_diam+1)+0.5;
|
|
centv=ceil(patch_diam/2)+1;
|
|
for test=1:1
|
|
centh=ceil(patch_diam/2)+1;
|
|
for mw=mask_wavels([1,4,7])*patchscale
|
|
phase=0;
|
|
if test==1 %cross-orientation simulus
|
|
I=image_cross_orientation_sine(patch_diam,grating_wavel*patchscale,mw,0,90, ...
|
|
phase,phase,0.1,0.25);
|
|
|
|
else %spatial freq tuning
|
|
I=image_square_grating(patch_diam,0,mw,0,phase,0.5);
|
|
end
|
|
[a,b]=size(I);
|
|
L(centv-floor(a/2):centv+floor(a/2),centh-floor(a/2):centh+floor(a/2))=I;
|
|
centh=centh+spacingh;
|
|
end
|
|
centv=centv+spacingv;
|
|
end
|
|
imagesc(L);
|
|
axis('equal','off')
|
|
ends=60;
|
|
axis([-ends,2*spacingh+patch_diam+ends,0,patch_diam])
|
|
hold on
|
|
|
|
cmap=colormap('gray');
|
|
%cmap=1-cmap;
|
|
%colormap(cmap);
|