| Abbreviation | Definition |
|---|---|
| inf. | infinity |
| ING | Imaging Network Group |
| INIT | Institute of New Imaging Technologies |
| INPA | International Newborn Photography Association |
| IOI | Imaging Of Infections |
| IOSS | Imaging of Stellar Surfaces |
| IPPA | Indianhead Professional Photographers Association |
| IPSG | Imaging and Personal Systems Group |
| IPW | Interactive Photography Workshop |
| IQ | Inverse Quantitization |
| IRAC | Imaging Response Assessment Core |
| IRAI | Ionizing Radiation Acoustic Imaging |
| IRIA | Indian Radiological and Imaging Association |
| IRT | Infrared Radiation Thermography |
| IS | Image Stabilization |
| ISBI | International Society for Biomedical Imaging |
| ISDIS | International Society for Digital Imaging of the Skin (New York, NY) |
| ISIC | International Skin Imaging Collaboration |
| ISML | Imaging Signals and Machine Learning |
| ISPG | Irish Street Photography Group |