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+===== Vision: Human and Electronic =====
+This material is for Tobi Delbruck's part of the block course on Computational Neuroscience for biology students taught by [[http://www.ini.uzh.ch]].
+  * {{retinablockcourseassignment.pdf|The assignment}}
+  * {{retinablockcourseslides.pdf|Lecture slide handouts}}
+  * {{mahowaldmeadsiliconretinasciam1991color.pdf|Paper on the silicon retina}}
+  * {{delbruckphysiofriendvisionresearchv44i17.pdf|Paper on the Physiologist's Friend chip}}
+  * [[http://siliconretina.ini.uzh.ch|The silicon retina dynamic vision sensor]]
+  * [[http://www.ini.uzh.ch/~tobi/friend|The physiologist's friend project]]
+  * [[http://www.ini.uzh.ch/~tobi/anaprose/recep|Adapative photoreceptor circuit]]
+===Matlab code for experiments===
+<code matlab>
+%%
+loadaerdat;  % loads retina data from a recorded .dat file. Raw addreses are allAddr, timestamps in us are allTs
+%%
+x=64;
+y=64;
+p=1;
+ra=p+bitshift(x,1)+bitshift(y,8);  % compute the raw address of pixel x,y=64,64 with polarity=1 (on)
+%%
+ind=find(ra==allAddr); % find the indices of all the spikes from this pixel
+allTs(ind) % print the timestamps
+%% iterate of a block of pixels and store the number of spikes from each pixel in a vector c, then histogram these counts
+c=[];
+for i=0:1
+for t=48:96
+    x=t;
+    y=t;
+    p=i;
+    ra=p+bitshift(x,1)+bitshift(y,8);
+    ind=find(ra==allAddr);
+    res=allTs(ind);
+    c=[c length(ind)];
+end
+end
+</code>