Differences

This shows you the differences between two versions of the page.

--- research:holes_crowding [2014/09/30 16:49] – anthony
+++ research:holes_crowding [2019/05/22 16:08] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-====== To Do List ======
+[[internal:holes_crowding|Practical Notes (lab members only)]]
-AC:
-  * Fix application of Binary2Depth function to GERT-generated 3-letter images.
+[[research:holes_crowding_vss2016_abstract|VSS 2016 abstract (submitted)]]
-  * Make sure can display convex version of 3D letters too.
-  * Generate more letters for use with GERT (not just G,E,R,T)
-MH:
-  * Tweak HolesCrowd_TEST.m to find best-looking depth multiplier for images
-Find good "Depth multiplier" numbers for two different files:
-  * BigFatT.png
-  * BigT.png
-   im = double(imread('BigFatT.png','png'));
-   im = mean(im,3);
-   im = Binary2Depth_thin(~logical(im));
-   %im = im/255;
-   %im = ~im;
-   %%%%%%
-   im = round(im*2.5); %% MH tweak this number
-   %%%%%%
-====== Design notes ======
-Great article for methods:
-http://www.journalofvision.org/content/13/1/24
-Visual angle of letters:
-Boots CRT monitor is 36.5 cm wide. Comfortable sitting distance for AC is 50cm exactly, so use this as viewing distance. Currently, PTB whole-screen window is 1024 pixels wide, so 20.48 px/cm.
-NOTE: this size is for use with the boots PC and monitor only! This pixel size is tiny on diego's monitor.
-Strasburger & Malania used 4 deg. eccentricity targets
-deg. at 50cm on the boots CRT monitor: 3.49cm = 71.47px ~ 71 px.
-.5 deg at 50cm on boots CRT: .44cm = 9.01 ~ 9 px.
-Can use stimulus width as the distance between flankers.
-Plan: scale these numbers up, but keep the ratios.
-First try: if boots CRT is 1024 px wide, can go up to almost 512 px eccentricity, 512/71 ~ 7.  So let's scale up by 5 to be safe:
-Place target at 71*5 ~ 350 px away from fixation cross (which should be at the center of the monitor)
-Make targets 9*5 = 45 px tall and 45 pixels apart.