Glossary
- Page ID
- 146067
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| (Eg. "Genetic, Hereditary, DNA ...") | (Eg. "Relating to genes or heredity") |  |
The infamous double helix | https://bio.libretexts.org/ | CC-BY-SA; Delmar Larsen |
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Word(s) |
Definition |
Image | Caption | Link | Source |
|---|---|---|---|---|---|
| Apparent Temperature | The temperature indicated by a thermal camera, influenced by emissivity, reflections, atmospheric effects, and camera settings. See Chapters 4, 6, 7 |
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| Atmospheric Attenuation | The reduction of infrared radiation reaching the camera due to absorption and scattering by the atmosphere. See Chapters 3, 15, 17 | ||||
| Blackbody | An idealized object that absorbs all incident radiation and emits infrared radiation with maximum efficiency for a given temperature. See Chapter 3 |
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| Calibration | Verification of a thermal camera’s measurement accuracy against a known reference, typically performed by the manufacturer or authorized service provider. See Chapters 5, 6 |
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| Conduction | Heat transfer through direct contact within a material. See Chapter 2 | ||||
| Convection | Heat transfer through the movement of fluids (liquids or gases). See Chapter 2 |
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| Emissivity | A material property describing how effectively a surface emits infrared radiation compared to a blackbody. See Chapters 4, 6, 10 |
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| Flat Field Correction (FFC) | An internal camera process that compensates for non-uniform detector response to improve image uniformity. See Chapters 6, 10 |
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| Focus, Range, and Distance (FoRD) | A foundational concept describing three capture-critical factors that determine thermal data validity; FoRD errors cannot be corrected in software. See Chapters 6, 10, 15, 17, 18 |
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| Ground Sample Distance (GSD) | The physical ground area represented by a single pixel in an image, commonly used in aerial thermography. See Chapters 15, 17 |
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| Infrared Radiation | Electromagnetic radiation emitted by objects as a function of temperature, with wavelengths longer than visible light. See Chapter 3 |
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| Isotherm | A visual overlay highlighting pixels within a selected temperature range. See Chapter 7, Appendix B |
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| Level and Span | Display controls that define how temperature values are mapped to colors in a thermal image. See Chapters 6, 7, Appendix B |
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| Motion Blur | Loss of image clarity caused by camera or target movement during image capture. See Chapters 10, 18 |
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| Radiation | Heat transfer through electromagnetic waves without a physical medium. See Chapters 2, 3 |
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| Radiometric Image | A thermal image containing temperature data for each pixel. See Chapters 7, 18, 19 |
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| Reflected Apparent Temperature | Infrared energy reflected from surrounding objects rather than emitted by the target. See Chapters 4, 6 |
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| Solar Loading | Surface heating caused by absorbed solar radiation, which can influence thermographic results. See Chapters 2, 8, 17 |
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| Thermal Contrast | The temperature difference that allows a target to be distinguished from its surroundings. See Chapters 2, 8 |
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| Thermal Sensitivity (NETD) | The smallest temperature difference a thermal camera can resolve. See Chapters 5, 8 |
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| Thermogram | A visual representation of infrared radiation emitted by a surface. See Chapters 1, 7 |
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| ASNT | American Society for Nondestructive Testing | ||||
| CP-105 | ASNT Training Outlines for Nondestructive Testing Personnel | ||||
| FFC | Flat Field Correction | ||||
| FoRD | Focus, Range, and Distance | ||||
| FOV | Field of View | ||||
| GSD | Ground Sample Distance | ||||
| IR | Infrared | ||||
| LWIR | Long-Wave Infrared (approximately 8–12 µm) | ||||
| MWIR | Mid-Wave Infrared (approximately 3–5 µm) | ||||
| NETD | Noise Equivalent Temperature Difference | ||||
| NDT | Nondestructive Testing | ||||
| OJT | On-the-Job Training | ||||
| RPIC | Remote Pilot in Command | ||||
| RSI | Related Supplemental Instruction | ||||
| TFR | Temporary Flight Restriction | ||||
| UAS | Unmanned Aircraft System | ||||
| VO | Visual Observer |