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    SOLVED RAW-MIPI-SC53M maximum exposure length

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    • veye_xumm
      veye_xumm @Izaak last edited by

      @izaak In fact, in the Video streaming mode, it is impossible to achieve an exposure time of 1 second. I conducted a test in the 2 - lane raw8 format, as follows:

      pi@raspberrypi:~/mvcamera/mv_tools_rpi $ ./mv_mipi_i2c_new.sh -w fps 0.01 
      w fps 0.01
      pi@raspberrypi:~/mvcamera/mv_tools_rpi $ ./mv_mipi_i2c_new.sh -r fps      
      r fps is 3.48 fps
      pi@raspberrypi:~/mvcamera/mv_tools_rpi $ ./mv_mipi_i2c_new.sh -w metime 1000000
      w manual exp time is 1000000 us 
      pi@raspberrypi:~/mvcamera/mv_tools_rpi $ ./mv_mipi_i2c_new.sh -r exptime       
      r current exptime is 287129 us
      

      It can be achieved in Pulse Trigger Mode. However, due to the excessive accumulated dark current, the signal noise will be very high. I don't think it has practical value.

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        golden0514 @veye_xumm last edited by

        @veye_xumm 这种情况下如何采集图像,使用mv_mipi_i2c_new.sh可以设置曝光时间,但是如何采集,没有demo。

        veye_xumm 1 Reply Last reply Reply Quote 0
        • veye_xumm
          veye_xumm @golden0514 last edited by

          @golden0514 你的嵌入式平台是什么?

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            golden0514 @veye_xumm last edited by

            @veye_xumm 树莓派4b

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            • veye_xumm
              veye_xumm @golden0514 last edited by

              @golden0514
              可以参考这篇文章进行取图。
              https://wiki.veye.cc/index.php/Mv_series_camera_appnotes_4_rpi/zh

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                golden0514 @veye_xumm last edited by

                @veye_xumm 按照这篇文章里修改曝光时间没有效果,设置成1或者255,采集的图像几乎不变。

                veye_xumm 1 Reply Last reply Reply Quote 0
                • veye_xumm
                  veye_xumm @golden0514 last edited by

                  @golden0514 这篇文章没有修改曝光时间的东西吧? 有设置格式,分辨率,帧率,取图相关的内容。

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                    golden0514 @veye_xumm last edited by

                    @veye_xumm 刚才试过了,问题解决,最大曝光时间0.3″,基本够用了

                    veye_xumm 1 Reply Last reply Reply Quote 0
                    • veye_xumm
                      veye_xumm @golden0514 last edited by

                      @golden0514 你可以进一步将fps设置小,相应的最大曝光时间也会拉长。

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                        golden0514 @veye_xumm last edited by

                        @veye_xumm IMG_20250715_095052.jpg IMG_20250715_095117.jpg
                        曝光时间设置还是有问题,fps一直是30,最大曝光时间一直是33ms,264m。
                        请看看怎么才能调整长一些曝光时间,比如1s。

                        veye_xumm 1 Reply Last reply Reply Quote 0
                        • veye_xumm
                          veye_xumm @golden0514 last edited by

                          @golden0514 你好。
                          我们相机有一个底层逻辑,fps参数会优先于曝光时间设置。
                          如果你想要1秒的曝光时间,需要先将帧率设置为1帧/秒,然后再设置曝光时间即可。

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