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91 lines
3.0 KiB
Matlab
91 lines
3.0 KiB
Matlab
function V1_surround_suppression_plaid_contrast
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crop=0;
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grating_wavel=6;
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contrasts=[0,0.01,0.025,0.05,0.1,0.25,0.5,0.8,1.25];
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iso_contrast=0.3;
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node=1;
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patch_diam=13;
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iterations=30;
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phase=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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fprintf(1,'.%i.',i);
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%contextual surround:
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I=image_contextual_surround_plaid(patch_diam,0,20,grating_wavel,...
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grating_wavel,grating_wavel,0,90,...
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phase,phase,phase,...
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iso_contrast,iso_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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0,0,0,iso_contrast,0);
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end
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[Ion,Ioff]=preprocess_image(I);
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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(:,:,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(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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[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(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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sc(i)=y(ceil(a/2),ceil(b/2),node);
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end
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figure(1),clf
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zeroOffset=0.002;
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blankx=0.002;
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subplot(3,2,[4,6])
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plot(log(zeroOffset+contrasts(1:length(sc)-1)),sc(1:length(sc)-1),'r-o','LineWidth',4,'MarkerSize',12,'MarkerFaceColor','w');
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axis([log(zeroOffset),log(zeroOffset+1),0,0.032])
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set(gca,'XTick',log(zeroOffset+[0,0.01,0.1,1]),'YTick',[0:0.01:0.06]);
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set(gca,'XTickLabel',[0,0.01,0.1,1],'FontSize',20,'Box','off');
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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(log(zeroOffset+blankx+[0,0]),[0,0.5],'w','LineWidth',15);
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plot(log(zeroOffset+[0,1]),sc(length(sc)).*[1,1],'b-','LineWidth',4);
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figure(2),clf
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maxsubplot(5,2,8)
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maxdiam=3*patch_diam;
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spacingh=(275-maxdiam)/2;
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L=zeros(maxdiam,2*spacingh+maxdiam)+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,iso_contrast,iso_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);
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axis('equal','off')
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ends=60-maxdiam/2;
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axis([-ends,2*spacingh+maxdiam+ends,0,maxdiam])
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hold on
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centv=ceil(maxdiam/2)+1;
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plot(mean([maxdiam,spacingh]),centv,'ro','LineWidth',4,'MarkerSize',8,'MarkerFaceColor','w');
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plot(mean([maxdiam+spacingh,2*spacingh]),centv,'ro','LineWidth',4,'MarkerSize',8,'MarkerFaceColor','w');
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cmap=colormap('gray');
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%cmap=1-cmap;
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%colormap(cmap);
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