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Questions and Answers
Questions and Answers
What type of data are scientific digital images?
What type of data are scientific digital images?
- Temporal data representing time intervals
- Qualitative data with no numerical values
- Abstract data without any structure
- Numerical data arranged spatially (correct)
According to Dr. John Russ, what is a key point regarding human observers and image interpretation?
According to Dr. John Russ, what is a key point regarding human observers and image interpretation?
- Humans are excellent observers with minimal limitations
- Humans often see what they expect to see (correct)
- Having names and labels for recognized features is not important
- Our vision system captures all available information accurately
Why should manipulation of digital images be done on a copy of the unprocessed image data file?
Why should manipulation of digital images be done on a copy of the unprocessed image data file?
- To enhance the original raw data file
- To eliminate the need for understanding instrument limitations
- To avoid any limitations imposed by physics and instrument design
- To maintain the standard for comparison with the final image (correct)
What do the individual elements in a digital image represent?
What do the individual elements in a digital image represent?
What is the responsibility of the user regarding understanding instrument limitations?
What is the responsibility of the user regarding understanding instrument limitations?
How should the final image be compared after manipulation according to the text?
How should the final image be compared after manipulation according to the text?
According to the MSA Policy on Digital Image Manipulation, which of the following operations is generally considered acceptable without needing to be reported?
According to the MSA Policy on Digital Image Manipulation, which of the following operations is generally considered acceptable without needing to be reported?
What is required for any imaging operations other than gamma correction, histogram stretching, and brightness/contrast adjustments?
What is required for any imaging operations other than gamma correction, histogram stretching, and brightness/contrast adjustments?
What is the primary requirement for the original uncompressed image file, according to the MSA Policy?
What is the primary requirement for the original uncompressed image file, according to the MSA Policy?
For diffraction data or any other image data used for subsequent quantification, what is required according to the MSA Policy?
For diffraction data or any other image data used for subsequent quantification, what is required according to the MSA Policy?
What is the primary purpose of the MSA Policy on Digital Image Manipulation?
What is the primary purpose of the MSA Policy on Digital Image Manipulation?
According to the guidelines provided, which of the following statements is true?
According to the guidelines provided, which of the following statements is true?
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Study Notes
Study Notes
Ethical Digital Imaging Policy
- The MSA policy on Digital Image Manipulation advises EMS users to store original, uncompressed image files on archival media (e.g., CD-R) without any image manipulation or processing operations.
- All parameters of image production and acquisition, as well as subsequent processing steps, must be documented and reported to ensure reproducibility.
Acceptable Image Operations
- Acceptable, non-reportable imaging operations include gamma correction, histogram stretching, and brightness and contrast adjustments.
- Other operations (e.g., Unsharp-Masking, Gaussian Blur) must be directly identified by the author as part of the experimental methodology.
Guidelines for Scientific Digital Image Acquisition and Manipulation
- Scientific digital images are data that can be compromised by inappropriate manipulations.
- Images are data arranged spatially in an XY matrix (or grid) and each individual element (pixel) has a numerical value that represents a grayscale or RGB intensity value.
- The data acquisition system and sensor are subject to limitations and aberrations imposed by physics and instrument design.
- The user is responsible for understanding the limitations of the particular instrument.
Best Practices
- Manipulation of digital images should always be done on a copy of the unprocessed image data file.
- The original raw data file is the standard to which the final image can and should be compared.
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