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- Each pixel of the CCD camera (digital camera) is capable of imaging a fixed amount of light (photons).
- When the amount of light exceeds the pixel's capacity, the pixel becomes saturated.
- This excess light overflows (smears) to the surrounding pixels and blooming occurs.
- PROPERLY EXPOSED IMAGE
- EXCESS LIGHT OVERFLOWS AND BLOOMING OCCURS
- Reflective Retinal Pathology that might cause Blooming:
- Optic Nerve
- Laser Scar
- Exudates
- Drusen
- Large Vessels
- Leakage on Angiography
- EXAMPLES
- EXAMPLES
- Image blooming can cause loss of diagnostic information.
- Once image blooming occurs you can’t recover or “burn in” the overexposed area as with film.
- HINTS:
- Decreasing flash and/or gain on the camera will lessen the amount of blooming.
- Anticipate and compensate for potential blooming.
- Slightly underexposing an image can help to avoid blooming.
- Bracketing images might be needed.
- Sometimes blooming can't be avoided.
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