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isp:automatic_exposure [2018/06/05 06:03] – [Individual color channel gains] Vanda Khachatrian | isp:automatic_exposure [2018/06/05 06:05] – [Increase the brightness] Vanda Khachatrian | ||
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==== Global Gain ==== | ==== Global Gain ==== | ||
- | Global Gain is a Gain that is applied to **every** pixel. Adjusting this setting greatly affects the brightness of the picture while only minimally affecting the color balance. | + | Global Gain is a Gain that is applied to **every** pixel. Adjusting this setting greatly affects the brightness of the picture while only minimally affecting the color balance. The offset to increasing gain is that it will increase the noise. |
===== " | ===== " | ||
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- If we have not reached the limit on Exposure setting - increase it by multiplying by the target/real brightness ratio | - If we have not reached the limit on Exposure setting - increase it by multiplying by the target/real brightness ratio | ||
- Else, if we have not hit the Global Gain limit - increase it by multiplying by the target/real brightness ratio | - Else, if we have not hit the Global Gain limit - increase it by multiplying by the target/real brightness ratio | ||
- | - Else (special case!) **only** if the auto-white balance is currently turned **on** and if the brightness adjustment is very high (above '' | + | - Else (special case!) **only** if the auto-white balance is currently turned **on** and if the brightness adjustment is very high (above '' |
- Never increase the Green Gain beyond '' | - Never increase the Green Gain beyond '' | ||
- Only increase the Green Gain as much as to not cause the overflow for the Gains in Red or Blue channels (take a conservative guess and then lower it by another '' | - Only increase the Green Gain as much as to not cause the overflow for the Gains in Red or Blue channels (take a conservative guess and then lower it by another '' |