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CS Camera Slow Shutter manual (view source)
Revision as of 14:26, 26 November 2020
, 14:26, 26 November 2020no edit summary
[[CS Camera Slow Shutter manual/zh|查看中文]]
[[CS Camera Slow Shutter manual/zh|查看中文]]
=== Introduction ===
CS series cameras support slow shutter mode, the following mainly introduces the slow shutter application of CS-MIPI-IMX307.
=== Version description ===
For the record of version , please refer to the [[CS-MIPI-IMX307 version log|VEYE-MIPI-IMX307 Version Log]].
<br />
Slow shutter is supported only after FV2.32, and is improved in later versions of FV2.35. '''Customers who use the slow shutter function must upgrade to a later version of FV2.35.'''
=== Use restriction ===
==== SYNC mode ====
Do not support framerate continuously adjustable function and slow shutter mode.
==== Exposure time effective delay and transmission delay ====
After configuring an me time, it is recommended to take the 5th frame to use.
=== IMX307 feature ===
The exposure time of the sensor is adjusted by ''one line time——'' t<sub>r</sub>. For IMX307, the supported exposure time range is [tr,0x3FFFF*tr].
{| class="wikitable"
|+IMX307 exposure time range
!camera mode
!t<sub>r</sub>
!min exp time
!max exp time
!min framerate
!max framerate
|-
|1920*1080
|30us
|30us
|7,767,200us
|0.13
|30
|-
|1280*720
|22us
|22us
|5,825,400us
|0.18
|60
|-
|640*480
|15us
|15us
|3,877,855us
|0.26
|130
|}
* The current actual exposure time and gain value can be read through expostate at any time.
<code>./cs_mipi_i2c.sh -r -f expostate</code>
=== Autoexposure mode slow shutter configuration ===
*Set to auto exposure mode
<code>./cs_mipi_i2c.sh -w -f expmode -p1 0</code>
*Set to slow shutter mode
<code>./cs_mipi_i2c.sh -w -f expfrmmode -p1 0</code>
*Set slowshuttergain
<code>./cs_mipi_i2c.sh -w -f slowshuttergain -p1 X -p2 Y</code>
*Set aetime
<code>./cs_mipi_i2c.sh -w -f aetime -p1 [max exptime]</code>
In slow shutter mode, the scene gradually darkens, AE algorithm will first increase the exposure time, after reaching the upper limit of 1/framerate, and then increase the gain, after reaching the threshold shuttergain value, continue to increase the exposure time (up to aetime), when the frame rate will be reduced.
=== Manual exposure mode configuration ===
* Set framerate
<code>./cs_mipi_i2c.sh -w -f videofmt -p1 1920 -p2 1080 -p4 [framerate]</code>
framerate range is [min framerate , max framerate].
* Set to manual exposure mode
<code>./cs_mipi_i2c.sh -w -f expmode -p1 1</code>
* Set to manual gain(Optional)
<code>./cs_mipi_i2c.sh -w -f meagain -p1 X -p2 Y</code>
<code>./cs_mipi_i2c.sh -w -f medgain -p1 X -p2 Y</code>
* Set manual
<code>./cs_mipi_i2c.sh -w -f metime -p1 [exptime]</code>
metime upper limit is（1000000/framerate）us.