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83 lines
2.5 KiB
Matlab
83 lines
2.5 KiB
Matlab
function V1_temporal_frequency_tuning
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crop=14;
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grating_wavel=6;
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patch_diam=50;
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iterations=12;
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drift_rates=[1,2,4,10,20,60,180];
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angle=90;
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node=5;
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[wFFon,wFFoff]=dim_conv_V1_filter_definitions;
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clf
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i=0;
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for drift_rate=drift_rates
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i=i+1;
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fprintf(1,'.%i.',i);
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phase=0;
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for t=1:iterations
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I=image_square_grating(patch_diam,0,grating_wavel,angle,phase,0.25);
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[Ion(:,:,t),Ioff(:,:,t)]=preprocess_image(I);
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phase=phase+drift_rate;
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end
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[a,b]=size(I);
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%plot original image
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maxsubplot(3,length(drift_rates),i),
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imagesc(Ion(:,:,1),[0,1]);
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axis('equal','tight'), set(gca,'XTick',[],'YTick',[],'FontSize',11);
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drawnow;
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%initial response without competition
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[y,ron,roff,eon,eoff,Y]=dim_conv_on_and_off(wFFon,wFFoff,Ion,Ioff,1);
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y=mean(Y,4);
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maxsubplot(3,length(drift_rates),i+length(drift_rates)),
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imagesc(y(crop+1:a-crop,crop+1:b-crop,node),[0,0.05]),
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axis('equal','tight'), set(gca,'XTick',[],'YTick',[],'FontSize',11);
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drawnow;
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%perform competition
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[y,ron,roff,eon,eoff,Y]=dim_conv_on_and_off(wFFon,wFFoff,Ion,Ioff,iterations);
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y=mean(Y,4);
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maxsubplot(3,length(drift_rates),i+2*length(drift_rates)),
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imagesc(y(crop+1:a-crop,crop+1:b-crop,node),[0,0.025]),
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axis('equal','tight'), set(gca,'XTick',[],'YTick',[],'FontSize',11);
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drawnow;
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sc(i)=y(ceil(a/2),ceil(b/2),node);
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%sc(i)=sum(sum(sum(y(crop+1:a-crop,crop+1:b-crop,:))));
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end
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figure(1),clf
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drift_rates=drift_rates./360; %convert to cycles / iteration
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subplot(3,2,[4,6])
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semilogx(drift_rates,sc,'r-o','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','w');
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axis([min(drift_rates)./2,max(drift_rates).*2,0,0.006]);
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set(gca,'XTick',[0.005,0.05,0.5],'YTick',[0:0.001:0.005],'FontSize',20,'Box','off');
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%axis([min(drift_rates)./2,max(drift_rates).*2,0,10]);
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%set(gca,'XTick',[0.005,0.05,0.5],'YTick',[0:2:10],'FontSize',20,'Box','off');
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set(gca,'XTickLabel',[0.005,0.05,0.5]);
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xlabel('Drift Rate (cycles/iteration)'),ylabel('Response')
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figure(2),clf
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maxsubplot(5,2,8)
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spacingh=ceil((275-patch_diam)/2);
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L=zeros(patch_diam,2*spacingh+patch_diam)+0.5;
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centv=ceil(patch_diam/2)+1;
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centh=ceil(patch_diam/2)+1;
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for drift_rate=drift_rates
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phase=0+drift_rate;
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I=image_square_grating(patch_diam,0,grating_wavel,angle,phase,1);
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[a,b]=size(I);
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L(centv-floor(a/2):centv+floor(a/2),centh-floor(a/2):centh+floor(a/2))=I;
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centh=centh+spacingh;
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end
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imagesc(L);
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axis('equal','off')
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ends=50-patch_diam/2;
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axis([-ends,2*spacingh+patch_diam+ends,-25,patch_diam])
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cmap=colormap('gray');
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%cmap=1-cmap;
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%colormap(cmap);
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