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    MV-MIPI-IMX178M+树莓派4B+OSPI5.15,官网例程不能使用

    Scheduled Pinned Locked Moved Raspberry Pi App Software
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    • veye_xummV Offline
      veye_xumm @maifengW2023
      last edited by

      @maifengw2023
      所谓高量子效应,你可能是简单化的理解了传感器的光谱响应曲线。这个曲线是sensor自己在不同波段的波长光线下的响应。你可以注意到,此曲线的最高点总是1。 不同sensor的灵敏度是不同的,因此不同的imx178的10%不见得就比imx264的7%高。
      我在sensor手册看到一个数据供你参考:

      • IMX178
        76328e14-8700-4d70-92c8-3f8916d97b32-image.png
      • IMX264

      55ea37ff-7619-42a9-8a14-f6ff1cd43d07-image.png

      • 测试条件
        5cbb5561-5540-4498-9255-fa13f6d8f9fa-image.png

      如果一定要使用IMX178,有一个手段是增加sensor的曝光时间,拉长触发信号和激光之间的间隔。保证sensor所有行都开始曝光了,还没有曝光结束的时候,激光打出来。
      你的光斑在图像中的相对位置是固定的吗?

      Questions will be answered as soon as possible, please be patient.
      如果你使用中文,请直接用中文提问。
      May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

      M 1 Reply Last reply Reply Quote 0
      • M Offline
        maifengW2023 @veye_xumm
        last edited by

        @veye_xumm
        你说这个也可以试试,imx178这个是非触发模式下,能看到的,而且效果也不错,现在是外触发模式,咱们哪个触发延时设置后没有效果,不清楚问题出在哪里,我今天再做一下试验,外触发信号的延迟放到我系统处理一下看看什么效果,IMX264我也在关注一下,264是全局曝光的吧

        veye_xummV 1 Reply Last reply Reply Quote 0
        • veye_xummV Offline
          veye_xumm @maifengW2023
          last edited by

          @maifengw2023 是的IMX264是全局曝光。

          @maifengw2023 said in MV-MIPI-IMX178M+树莓派4B+OSPI5.15,官网例程不能使用:

          我们是采用5Hz、20Hz的频率发射一束光,触发信号后50us出光,

          我感觉你这个50us的时间太短了。sensor绝大部分行还没有开始曝光呢,你的激光已经完成发射了。
          这个时间可以拉长吗?

          Questions will be answered as soon as possible, please be patient.
          如果你使用中文,请直接用中文提问。
          May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

          M 1 Reply Last reply Reply Quote 0
          • M Offline
            maifengW2023 @veye_xumm
            last edited by

            @veye_xumm
            光的时间不能拉长,曝光的时间可以拉长,这个是脉冲光,卷帘的刷新模式是怎样的?触发一次就曝光一次还是不停的循环曝光,整个探测器刷新一遍的时间是多少?

            veye_xummV 1 Reply Last reply Reply Quote 0
            • veye_xummV Offline
              veye_xumm @maifengW2023
              last edited by

              @maifengw2023 我的意思不是增加光的时间,是增加触发信号和激光发射之间的间隔。

              Questions will be answered as soon as possible, please be patient.
              如果你使用中文,请直接用中文提问。
              May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

              M 1 Reply Last reply Reply Quote 0
              • M Offline
                maifengW2023 @veye_xumm
                last edited by maifengW2023

                @veye_xumm
                这个可以,没问题

                veye_xummV 1 Reply Last reply Reply Quote 0
                • veye_xummV Offline
                  veye_xumm @maifengW2023
                  last edited by

                  @maifengw2023 你使用的分辨率,帧率说一下,我给计算一下。

                  Questions will be answered as soon as possible, please be patient.
                  如果你使用中文,请直接用中文提问。
                  May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                  M 1 Reply Last reply Reply Quote 0
                  • M Offline
                    maifengW2023 @veye_xumm
                    last edited by maifengW2023

                    @veye_xumm
                    分辨率是1920*1080,帧率用的10跟50;外触发是10,流模式是50

                    veye_xummV 1 Reply Last reply Reply Quote 0
                    • veye_xummV Offline
                      veye_xumm @maifengW2023
                      last edited by

                      @maifengw2023
                      首先你所说的外触发帧率是10,应该是你理想中的触发间隔,而不是相机的帧率。相机的帧率继续使用50fps的配置是没问题的。
                      我给你解释一下rolling shutter。
                      按照1920*1080分辨率,50fps的配置。我计算了一下,每行的传输周期大约是18us。
                      也就是说,收到触发信号之后,第一行开始曝光,然后延迟18us第二行开始曝光,再延迟18us后第三行开始曝光。

                      所以我的建议还是你选用global shutter的相机进行开发。全局曝光相机的好处是,收到触发信号之后,立刻开始全局一起曝光(不设置触发延迟的情况下),到约定的曝光时间完成之后,立刻同时结束曝光。时序上可控性更好。

                      Questions will be answered as soon as possible, please be patient.
                      如果你使用中文,请直接用中文提问。
                      May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                      M 1 Reply Last reply Reply Quote 0
                      • M Offline
                        maifengW2023 @veye_xumm
                        last edited by

                        @veye_xumm
                        这个178的确实用不成,所有参数都试了,效果不行,想换个264的,你们店铺不给更换,能不能帮忙说一下,我换一个264的,这个178的在手上也是浪费,用不成

                        veye_xummV 1 Reply Last reply Reply Quote 0
                        • veye_xummV Offline
                          veye_xumm @maifengW2023
                          last edited by

                          @maifengw2023 好

                          Questions will be answered as soon as possible, please be patient.
                          如果你使用中文,请直接用中文提问。
                          May the force be with YOU. (This is the translation of the mysterious Chinese symbol above.)

                          M 1 Reply Last reply Reply Quote 0
                          • M Offline
                            maifengW2023 @veye_xumm
                            last edited by

                            @veye_xumm
                            感谢!

                            1 Reply Last reply Reply Quote 0

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