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Correlation Between Image Reproduction Preferences and Viewing Patterns Measured with a Head Mounted Eye Tracker Lisa A. Markel Jeff B. Pelz, Ph.D. Center.

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Presentation on theme: "Correlation Between Image Reproduction Preferences and Viewing Patterns Measured with a Head Mounted Eye Tracker Lisa A. Markel Jeff B. Pelz, Ph.D. Center."— Presentation transcript:

1 Correlation Between Image Reproduction Preferences and Viewing Patterns Measured with a Head Mounted Eye Tracker Lisa A. Markel Jeff B. Pelz, Ph.D. Center for Imaging Science Rochester Institute for Technology

2 Hypothesis An eye tracker can be used to determine eye movements and fixations while viewing pairs of images. Scenes type dependent Portraits -> face and other exposed flesh Landscapes -> sky and foliage People In Nature -> flesh, sky, and foliage

3 Hypothesis There is also anticipation that there will be a distinct viewing pattern when comparing pairs or sets of images. Patterns: Original->Reproduction Alternation Original->Reproduction Overall Scanning

4 Eye Tracker  Eye Tracking Device  Applied Science Laboratories Series 5000 Eye Tracking System  Characteristics  Captures eye line of gaze with respect to head  Non-invasive  Mobility

5 Series 5000 Eye Tracking System  Eye Monitor  Pupil Reflection  Corneal Reflection  Scene Monitor  Scene display  Eye line of gaze Landscape Scene 1 Original Reproduction 1 Reproduction 2 +

6 Methodology  Participants  8 total participants  Students and Friends  7 male and 1 female  Normal Color Vision

7 Methodology  Stimuli  5x7 inch Prints  KODAK DS 8650 Thermal Printer  One Original, Two Reproductions  Original - straight-through output path  Reproductions - same as original with selective changes  Scene Categories with 12 Images Each  Portrait  Landscape  People in Nature

8 Image Preparation KODAK Photo CD Film Originals Color Adjustment KODAK DS 8650 Thermal Prints

9 Scene Layout Landscape Scene 1 Original Reproduction 1 Reproduction 2

10 Methodology  Questions  Determine which of the two reproductions are preferred  Determine which of the two reproductions most closely matches the original The order in which these two questions are performed will alternate.

11 Data Collection ä Initial Data Stored on 8mm tape Landscape Scene 1 Original Reproduction 1 Reproduction 2 + Approximately 35 minutes for each subject

12 Data Collection ä Tape data was analyzed frame by frame to acquire fixation information ä Each subject ä Every Image ä Approximately 3 hrs per subject Scene 1 A B Original 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 1 16 17 18

13 Data Analysis ä Points connected to see view patterns Scene 1 A B Original

14 Data Collection ä Spread Sheet Parameters ä Total Viewing Time for Each Scene ä Viewing Location (Original, A, B) ä Total Number of Fixations ä Number of Fixations Per Second ä Run Length (How many sequential fixations in the same image ä Number of Point to Point Correlations

15 Graphing Data ä Spreadsheet was used to generate several graphs ä Provide graphic data for each parameters ä Show the distinctions ä Between two questions asked and fixation patterns ä Between Scene Type

16 Results - Total Viewing Time

17 Results - Point to Point Correlation

18 Results - Total Number of Fixations

19 General Results Like Better Match Original

20 General Results ä Fixations ä Time - Most subjects had longer fixation when they were asked to choose which they like better ä Correlation Points - Larger number when trying to match the original ä Total Number of Fixation - Larger for matching original

21 General Results ä Scene Content ä Landscapes - General concentration to main subject in the scene, secondary focus on sky, foliage ä Portraits - Concentration on facial features, secondary focus on clothing ä People in Nature - Primary focus to flesh, secondary focus to foliage, sky

22 Further Testing ä More Subjects ä Statistics - ANOVA A final report will be available on the Web: http://www.cis.rit.edu/~lam8488


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