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Analysis of Image Quality

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Presentation on theme: "Analysis of Image Quality"— Presentation transcript:

1 Analysis of Image Quality
11/29/2018 Analysis of Image Quality Student: Jeffery D. Ahern Mentor: Edward Beshore Opening Slide. Time starts now.

2 11/29/2018 Catalina Sky Survey The mission of the Catalina Sky Survey is to find near-earth objects (NEOs) that pose an impact risk to Earth and it's inhabitants. To find transiat objects, We try and find objects that are in one frame but not the other 3 frames.

3 11/29/2018 Catalina Sky Survey This is done by taking four images that are exposed for 30 seconds separated by 10 minutes, and looking for objects that appear in one frame, and have a corresponding object in the other frames plotting in a straight line

4 Co-added Images Median average of multiple images
11/29/2018 Co-added Images Median average of multiple images Allow the creation of a deep star catalog Can compare faint objects to see if a known star is there

5 11/29/2018 Manual Selection Observer looks over all the images of a field and selects the best Subjective Time consuming Costly Hard to compare results

6 Quantitative & Automated Analysis
11/29/2018 Quantitative & Automated Analysis Meaning to data Comparable Objective judgments Standardization Decreased error Repeatable Reliable Fast

7 Metric for a Automated Analysis
11/29/2018 Metric for a Automated Analysis Full-Width Half-Maximum

8 What should not be counted
11/29/2018 Data Selection What should not be counted Artifacts Bright stars that cause image bleeding Galaxies Need image of Image Distortions

9 11/29/2018 Results The Full-Width Half-Maximum value is a good metric to use to determine if the image is in focus

10 11/29/2018 Questions

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