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--- biac:analysis:roi_et [2011/04/25 17:53]
petty [ROI Drawing]
+++ biac:analysis:roi_et [2023/02/23 18:43]
@@ Line 1: / Line 1: @@
-====== Region of Interest Based Eyetracking Analysis ======
-These steps were created to gather eyetracking information based on specific regions of interest drawn on stimuli from the experimental task.  The following assumes your task was image based, ( or images can be created to mimic the task ), there is XML behavioral output from the task, and your eyetracking was collected through Cigal or Viewpoint.
-===== Behavioral XML =====
-The first step is to create behavioral XML files using the [[http://www.biac.duke.edu/home/gadde/xmlheader-docs/|BXH/XCEDE tools]].
-Please see the documentation for eprime2xml, showplay2xml, eventstable2xml to create the files.
-Your resulting event nodes should include (at minimum):
-  * the image name
-  * onset
-  * duration
-For example:
-<HTML>
-  <event type="image" units="sec">
-    <onset>425.894</onset>
-    <duration>4</duration>
-    <value name="imgName">12F_CA_C.bmp</value>
-    <value name="regType">positive</value>
-    <value name="trialType">FACE</value>
-    <value name="response">1</value>
-    <value name="RT">244</value>
-  </event>
-</HTML>
-===== ROI Drawing =====
-Next, ROIs should be drawn for each image that you wish to calculate eyetracking data. These ROIs should be saved in an XML based format.  Chris Petty has written a matlab based function that will let you draw circles/ellipses or squares/rectangles on input images.  The result is an XML which can be merged into your behavioral XML using the bxh tool **bxh_eventmerge** .
-All of the following steps are based on this type of ROI.
-Here is a sample script to run the drawing function.
-  * The first thing you need is a text file with all the image paths ( the full path to the image is recommended ).
-  * Also, either add the path to the actual drawing function **"imgROI_keyfcn"**, or make a copy of it to your own directory.
-<file matlab drawer_sample.m>
-%% add path to functions
-%addpath \\Munin\Data\Programs\User_Scripts\petty\matlab\
-addpath ~/net/munin/data/Programs/User_Scripts/petty/matlab/
-%% full path to your text file, which contains images ( also full path )
-fileList = textread('file_names.txt','%s'); %read in list
-XML.rois = {}; %create empty XML
-outName = 'my_output.xml'; %name of output .xml with all ROIs ( file will overwrite on each save )
-%screen resolution of task display
-xRes = 1024;
-yRes = 768;
-scrSize = [ xRes yRes ];
-imgIDX = 0; %leave 0 to start at first image
-figUD = struct('imgIDX',imgIDX,'XML',XML);
-    %loop that finds images
-    imgs = {};
-    for file=1:length(fileList)
-        [path name ext] = fileparts(fileList{file});
-        imgs{file} = struct('fname',[name ext],'fpath',fileList{file});
-    end
-%% this opens the drawing window and runs functions: do not edit %%
-fscreen = repmat(uint8(0),[scrSize(2),scrSize(1),3]);
-axes_h = axes;
-imshow(fscreen,'Parent',axes_h,'InitialMagnification',100,'Border','tight');
-text(10,60,{'i - image','e - ellipse','r - rectangle','s - save','q - quit' },'HorizontalAlignment','left','BackgroundColor',[.5 .5 .5],'Color',[1 1 1]);
-figH = gcf;
-set(figH,'Toolbar','none','Resize','off');
-set(figH,'UserData',figUD);
-hold on;
-% calls the functions
-set(figH,'KeyPressFcn','imgROI_keyfcn(gcbo,axes_h,imgs,scrSize,outName)');
-</file>

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