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122 lines
3.6 KiB
Matlab
122 lines
3.6 KiB
Matlab
function V1_iso_surround_with_perp_surround_contrast
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linear=0;
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noLGNsat=0;
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crop=0;
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grating_wavel=6;
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contrasts=[0.0125,0.025,0.05,0.1,0.2,0.4,0.8,1.25];
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fixed_contrast=0.2;
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node=1;
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patch_diam=13;
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iterations=30;
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drift_rate=0;
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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 orth_contrast=contrasts
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i=i+1;
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phase=0;
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for t=1:iterations
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%centre-surround pattern with two surround gratings
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I=image_contextual_surround_plaid(patch_diam,0,20,...
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grating_wavel,grating_wavel,grating_wavel,...
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0,90,phase,phase,phase,...
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fixed_contrast,fixed_contrast,orth_contrast);
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if orth_contrast>1 %centre patch alone
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I=image_contextual_surround(patch_diam,20,0,grating_wavel,grating_wavel,...
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0,phase,phase,fixed_contrast,0);
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end
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[Ion(:,:,t),Ioff(:,:,t)]=preprocess_image(I,noLGNsat);
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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(contrasts),i),
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imagesc(I,[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(contrasts),i+length(contrasts)),
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imagesc(y(crop+1:a-crop,crop+1:b-crop,node),[0,0.01]),
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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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if linear
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[y,Y]=linear_on_and_off(wFFon,wFFoff,Ion,Ioff,1);
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else
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[y,ron,roff,eon,eoff,Y]=dim_conv_on_and_off(wFFon,wFFoff,Ion,Ioff,iterations);
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end
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y=mean(Y,4);
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maxsubplot(3,length(contrasts),i+2*length(contrasts)),
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imagesc(y(crop+1:a-crop,crop+1:b-crop,node),[0,0.01]),
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axis('equal','tight'), set(gca,'XTick',[],'YTick',[],'FontSize',11);
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drawnow;
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%record neural response
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respComplex(1:iterations)=calc_resp_complex(Y,ceil(a/2),ceil(b/2),node+[0:8:31]);
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meanrespComplex(i)=mean(respComplex,2);
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respSimple(1:iterations)=Y(ceil(a/2),ceil(b/2),node,:);
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meanrespSimple(i)=mean(respSimple,2);
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end
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numc=length(contrasts)-1;
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figure(1),clf
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subplot(3,2,[4,6])
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semilogx(contrasts(1:numc),meanrespSimple(1:numc),'r-o','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','w');
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axis([0.01,1,0,0.0325])
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set(gca,'XTick',[0.01,0.1,1],'YTick',[0:0.01:0.06]);
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set(gca,'XTickLabel',[0.01,0.1,1],'FontSize',20,'Box','on');
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xlabel('Contrast'),ylabel('Response')
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hold on
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%plot activity to centre alone
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plot([0.01,1],meanrespSimple(1+numc).*[1,1],'b-','LineWidth',4);
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if linear
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axis([0.01,1,0,0.35])
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set(gca,'YTick',[0:0.1:0.5]);
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end
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figure(2),clf
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subplot(3,2,[4,6])
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semilogx(contrasts(1:numc),meanrespComplex(1:numc),'r-o','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','w');
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axis([0.01,1,0,0.04])
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set(gca,'XTick',[0.01,0.1,1],'YTick',[0:0.01:0.06]);
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set(gca,'XTickLabel',[0.01,0.1,1],'FontSize',20,'Box','on');
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xlabel('Contrast'),ylabel('Response')
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hold on
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%plot activity to centre alone
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plot([0.01,1],meanrespComplex(1+numc).*[1,1],'b-','LineWidth',4);
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if linear
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axis([0.01,1,0,0.35])
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set(gca,'YTick',[0:0.1:0.5]);
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end
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figure(3),clf
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maxsubplot(5,2,8)
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maxdiam=3*patch_diam;
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spacingh=maxdiam+patch_diam;
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L=zeros(maxdiam+2,2*spacingh+maxdiam+1)+0.5;
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centv=ceil(maxdiam/2)+1;
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centh=ceil(maxdiam/2)+1;
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for orth_contrast=[0,0.16,0.8]
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I=image_contextual_surround_plaid(patch_diam,0,patch_diam,grating_wavel,grating_wavel,grating_wavel,0,90,0,0,0,fixed_contrast,fixed_contrast,orth_contrast);%contextual surround
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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,[0,1]);
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axis('equal','off')
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ends=10;
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axis([-ends,2*spacingh+maxdiam+ends,1,maxdiam]);
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cmap=colormap('gray');
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%cmap=1-cmap;
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%colormap(cmap);
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