When examining an image for defect pixels, test images should be viewed as 100% enlargements on a PC
monitor.
Figure 49 Enlargement of a hot pixel
Flash photography problems
Use of flash device may affect the image in many ways.
•
White balance errors. The image may get a wrong tone due to mixing of flash colour temperature and
ambient lightning. This is unwanted but normal feature.
•
Dust reflections. Dust or water drops in front of the flash unit may reflect strongly to the camera sensor.
See the following figure.
Figure 50 Light from the flash has reflected on particles in front of the camera
RM-484; RM-485; RM-486
Camera Module Troubleshooting
Page 5 –14 COMPANY CONFIDENTIAL Issue 1
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