| Hyperlink | A link that allows the viewer of a page to navigate or ‘jump’ to another location on the same page or on a different page |
| Hydrophone | Underwater microphone |
| Hue | The name of a color, e.g. red, green or blue |
| HTML | Hyper Text Markup Language. The code that is used to describe the contents and appearance of a web page |
| HQ | High-quality |
| Hosepiping | The tendency to make unnecessary movements |
| History Brush | A tool in Photoshop with which a previous state or history can be painted |
| Highlight | Area of subject receiving highest exposure value |
| High Dynamic Range | A picture type that is capable of storing 32 bits per color channel. This produces a photo with a much bigger possible brightness range than found in 16 –or 18-bit per channel photos. Photoshop creates HDR images with the merge to HDR feature |
| HID | High intensity discharge lights |
| Hi8 | Highband Video 8 |
| Headroom | The space between the top of the subject and the top of the picture |
| HDR | High Dynamic Range image |
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