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.
100 lines
3.0 KiB
Matlab
100 lines
3.0 KiB
Matlab
function sc=V1_size_tuning
|
|
crop=0;
|
|
grating_wavel=6;
|
|
|
|
diams=[3:4:31];
|
|
|
|
iterations=8;
|
|
contrast=0.25;
|
|
phase=0;
|
|
|
|
node=1;
|
|
|
|
[wFFon,wFFoff]=dim_conv_V1_filter_definitions;
|
|
|
|
clf
|
|
for test=1:2
|
|
i=0;
|
|
clear Ion Ioff;
|
|
for diam=diams
|
|
i=i+1;
|
|
fprintf(1,'.%i.',i);
|
|
if test==1 %a grating
|
|
I=image_contextual_surround(diam,max(diams)-diam/2,0,grating_wavel,grating_wavel,0,phase,0,contrast,0);
|
|
else %an annulus
|
|
I=image_contextual_surround(0,diam/2,max(diams)-diam/2,grating_wavel,grating_wavel,0,0,phase,0,contrast);
|
|
end
|
|
[Ion,Ioff]=preprocess_image(I);
|
|
[a,b]=size(I);
|
|
|
|
%plot original image
|
|
maxsubplot(3,length(diams),i),
|
|
imagesc(I(crop+1:a-crop,crop+1:b-crop,:),[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(diams),i+length(diams)),
|
|
imagesc(y(crop+1:a-crop,crop+1:b-crop,node),[0,0.05]),
|
|
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(diams),i+2*length(diams)),
|
|
imagesc(y(crop+1:a-crop,crop+1:b-crop,node),[0,0.05]),
|
|
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])
|
|
plot(diams,sc(1,:),'r-o','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','r');
|
|
hold on
|
|
plot(diams,sc(2,:),'b-o','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','w');
|
|
axis([1,33,0,0.008])
|
|
set(gca,'XTick',[5:5:30],'YTick',[0:0.002:0.008],'FontSize',20,'Box','off');
|
|
xlabel('Diameter (pixels)'),ylabel('Response')
|
|
figure(2),clf
|
|
maxsubplot(5,2,8)
|
|
maxdiam=max(diams).*2;
|
|
spacingh=maxdiam*2;(450-maxdiam)/2;
|
|
spacingv=max(40,maxdiam)
|
|
L=zeros(spacingv+maxdiam+1,2*spacingh+maxdiam+1)+0.5;
|
|
centv=ceil(maxdiam/2)+1;
|
|
for test=1:2
|
|
centh=ceil(maxdiam/2)+1;
|
|
for diam=diams([1,5,7])
|
|
if test==1
|
|
I=image_contextual_surround(diam,max(diams)-diam/2,0,grating_wavel,grating_wavel,0,0,0,contrast,0);%a grating
|
|
else
|
|
I=image_contextual_surround(0,diam/2,max(diams)-diam/2,grating_wavel,grating_wavel,0,0,0,0,contrast);%an annulus
|
|
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=maxdiam/2;
|
|
axis([-ends,2*spacingh+maxdiam+ends,max(diams)/2,2*maxdiam])
|
|
hold on
|
|
centv=ceil(maxdiam/2)+1;
|
|
plot(mean([maxdiam+15,spacingh-15]),centv,'ro','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','r');
|
|
plot(mean([maxdiam+spacingh+15,2*spacingh-15]),centv,'ro','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','r');
|
|
centv=centv+spacingv;
|
|
plot(mean([maxdiam+15,spacingh-15]),centv,'bo','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','w');
|
|
plot(mean([maxdiam+spacingh+15,2*spacingh-15]),centv,'bo','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','w');
|
|
cmap=colormap('gray');
|
|
%cmap=1-cmap;
|
|
%colormap(cmap);
|
|
|