The consistent appearance of red or blue dots in a fixed position, irrespective of Mac movement, may suggest a camera malfunction else nothing much to worry.
Understanding Low-Light Image Noise
In dim environments, your camera's sensor needs to work harder to capture enough light. To do this, it increases its sensitivity (gain). While this brightens the image, it can also introduce visual disturbances known as color noise, which might appear as red/blue flickering or a grainy texture. This noise is often more noticeable in darker areas of the image, such as the background, especially if your face is partially lit by your screen.
Troubleshooting Steps:
- Increase Ambient Light: Try slightly brightening your surroundings. You can do this by opening a web browser with a white background or turning on a small lamp.
- Observe Changes: Note if the red/blue flickering or graininess diminishes or disappears.
- Test with Recording Software: Use applications like Photo Booth or QuickTime to record short clips in various lighting conditions for comparison.
Interpreting the Results:
- Noise Significantly Reduced or Gone with More Light: This is expected behavior for cameras in low-light conditions.
- Noise Persists or Shows Unusual Patterns (like glitches or color splotches) Even in Good Lighting: This could indicate a potential hardware or sensor issue.
