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    jetson nano 2GB无法识别相机 MV-MIPI-IMX264M

    Scheduled Pinned Locked Moved Jetson App Software
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    • H Offline
      hmj @veye_xumm
      last edited by hmj

      @veye_xumm
      关于ROI, 有几个问题请教一下
      1:X,Y,W,H中的W应该多少字节对齐合适? 全画面下文档建议是64x, X的起始位置应为多少字节对其合适?参考代码中是8
      2:ROI重配置是否需要对/dev/video0设备关闭重新打开?
      3:ROI的设置有2部分重叠, I2C那边有设置参数, V4L2也有设置参数.是否要重配置
      如果我需一起哦截取的位置是 [256,256, 512,512] 那么V4L2那边的具体参数该怎么配置,从0,0开始(应为I2C已经配过了), 还是(256,256)开始?

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

        @hmj

        1. [y] [height] 的步长为 4，[width] 的步长为 8。

          实际上在jetson平台上，建议width的步长为64.这样方便jetson主板收到数据之后对齐操作，也方便你应用层处理。

        @hmj said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

        2:ROI重配置是否需要对/dev/video0设备关闭重新打开?

        不需要。

        @hmj said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

        3:ROI的设置有2部分重叠, I2C那边有设置参数, V4L2也有设置参数.是否要重配置

        不需要重复设置。
        如果你打开/dev/video0之前对camera做一系列配置，可以用脚本对摄像头进行一系列配置。然后打开/dev/video0，v4l2接口会得到新配置的参数。
        另一个方法，也更简单一些。对于v4l2接口支持的参数，就直接用v4l2接口配置。不支持的用脚本配置即可。

        @hmj said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

        如果我需一起哦截取的位置是 [256,256, 512,512] 那么V4L2那边的具体参数该怎么配置,从0,0开始(应为I2C已经配过了), 还是(256,256)开始?

        不管用什么配置方法，都正确传递[256,256, 512,512] 参数进去应该就可以的。

        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.)

        H 1 Reply Last reply Reply Quote 0
        • H Offline
          hmj @veye_xumm
          last edited by hmj

          @veye_xumm

          假设jetson上电后得预配置时[0,0,2432,2048],正在正常按节奏取图,
          这时UI 给了一个[128, 16, 1024, 256] 这么一个需求,
          如何配置驱动,才能让用户无感无缝切换图片.
          (配置时候,可以接受暂时停流, 不接受重启上层应用或重启jetson设备)

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

            @hmj 你在你的程序里面，调用stop stream（VIDIOC_STREAMOFF），然后配置roi，然后重新start stream（VIDIOC_STREAMON）。

            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.)

            H 1 Reply Last reply Reply Quote 0
            • H Offline
              hmj @veye_xumm
              last edited by

              @veye_xumm
              也就是说,在nano平台, 关于roi这组参数,可以忽略i2c层面配置,只有v4l那边配置就可以了?
              这么做是真实硬件ROI, 会带来FPS得提升吧?

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

                @hmj
                I2c脚本和v4l2接口，本质上都是通过i2c配置了camera的寄存器。所以只需要v4l做了，就无需使用脚本配置。
                是的，降低roi中的图像高度，会提升MAXFPS，你可以通过脚本获取当前配置下的max fps，然后配置fps到范围内的值。

                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.)

                H 1 Reply Last reply Reply Quote 0
                • H Offline
                  hmj @veye_xumm
                  last edited by hmj

                  @veye_xumm
                  我现在又遇到一个问题,如果我把相机曝光设置为10000(2432*2048), 查询GET_FPS,帧率大约为38.84,那么帧周期为27902, 在此基础上用硬触发(周期为28000的脉冲,其中高电平维持10000,站空比为5:7)去拍, 比如发送10个脉冲, 那么只能收到5图,如果把触发周期改成34000以上, 那么10图都能接受到.

                  我现在需要保证相机尽量快速取图,哪边还需要再配置才能获地高速?

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

                    @hmj 按照https://wiki.veye.cc/index.php/Mv_mipi_camera_manual/zh part2.4.3的描述，你的诉求应该是没有问题的。
                    你先参考这个链接，升级一下固件：https://wiki.veye.cc/index.php/Mvcam_firmware_update_manual
                    然后再做一下测试试试。

                    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.)

                    H 1 Reply Last reply Reply Quote 0
                    • H Offline
                      hmj @veye_xumm
                      last edited by

                      @veye_xumm

                      ./mv_mipi_i2c.sh -r -f version
                      version is C 01.34 and L 02.00
                      貌似已经是最新固件,与网站上6月5日是同一版, 无需再升级

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

                        @hmj https://wiki.veye.cc/index.php/Mv_mipi_i2c.sh_user_guide
                        参考这个页面，把trigger相关的参数读出来一下，发给我看看。
                        trgnum
                        trginterval
                        trgdelay
                        trgedge
                        trgfilter_enable
                        trgfilter_time
                        trgexp_delay
                        trgcount

                        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.)

                        H 1 Reply Last reply Reply Quote 0
                        • H Offline
                          hmj @veye_xumm
                          last edited by

                          @veye_xumm said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

                          trgcount

                          pt@dpt-desktop:./mv_mipi_i2c.sh -r -f version
                          version is C 01.34 and L 02.00
                          dpt@dpt-desktop: ./mv_mipi_i2c.sh -r -f trgnum
                          r trigger num is 1
                          dpt@dpt-desktop: ./mv_mipi_i2c.sh -r -f trginterval
                          r trginterval is 0
                          dpt@dpt-desktop:./mv_mipi_i2c.sh -r -f trgdelay
                          r trgdelay is 0
                          dpt@dpt-desktop:./mv_mipi_i2c.sh -r -f trgedge
                          r trg edge is 0
                          dpt@dpt-desktop: ./mv_mipi_i2c.sh -r -f trgfilter_enable
                          r trgfilter enable is 0
                          dpt@dpt-desktop: ./mv_mipi_i2c.sh -r -f trgfilter_time
                          r trgfilter time is 1 us
                          dpt@dpt-desktop:./mv_mipi_i2c.sh -r -f trgexp_delay
                          r trigger exposure delay is 0 us
                          dpt@dpt-desktop:./mv_mipi_i2c.sh -r -f trgcount
                          r trigger count 156, trigger lost 0

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

                            @hmj 你现在读取一下fps和maxfps，分别是多少？

                            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.)

                            H 2 Replies Last reply Reply Quote 0
                            • H Offline
                              hmj @veye_xumm
                              last edited by

                              @veye_xumm
                              ./mv_mipi_i2c.sh -r -f maxfps
                              r maxfps @ current setting is 35.84 fps
                              ./mv_mipi_i2c.sh -r -f fps
                              r fps is 30.00 fps

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

                                @hmj
                                这是问题所在了。
                                虽然是触发模式，但是实际生效的帧率还是fps这个参数，maxfps永远只是最大能力的一个提示而已。
                                那么你之前

                                @hmj said in jetson nano 2GB无法识别相机 MV-MIPI-IMX264M:

                                查询GET_FPS,帧率大约为38.84,那么帧周期为27902,

                                这个地方的帧周期计算，应该使用fps来算。 这个fps不仅影响着camera真正的运作时序，也影响着最大可设的曝光时间。
                                建议你：

                                ./mv_mipi_i2c.sh -w -f fps -p1 40 -b [bus]
./mv_mipi_i2c.sh -r -f fps -b [bus]

                                这样，就把相机设置到了当前roi下最大帧率。
                                应该就没问题了。

                                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.)

                                H 1 Reply Last reply Reply Quote 0
                                • H Offline
                                  hmj @veye_xumm
                                  last edited by

                                  @veye_xumm
                                  感谢,问题解决~

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

                                    @hmj 不客气

                                    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.)

                                    1 Reply Last reply Reply Quote 0
                                    • H Offline
                                      hmj @veye_xumm
                                      last edited by

                                      @veye_xumm
                                      我们现在基本测试已经通过,现在有个棘手的问题,由于jetson nano的mipi驱动在kernel image中,我目前的做法是直接替换官方的.

                                      我们目前项目中添加了许多其他功能, 因此修改了内核的许多地方.所以为了替换之前的老相机,必须拿到你们kenrel源码和DTS, 再整合进我们目前的内核中,才能无缝完成项目的迁移.

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

                                        @hmj 请参考下面这个链接
                                        https://wiki.veye.cc/index.php/VEYE_CS_Camera_source_for_Jetson/zh

                                        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.)

                                        H 1 Reply Last reply Reply Quote 0
                                        • H Offline
                                          hmj @veye_xumm
                                          last edited by

                                          @veye_xumm
                                          相机有没有调节对比度的api, 我们目前发现图片在拍黑白图案(相机标定)时候,图片质量没有国外相机明显.

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

                                            @hmj 您可以通过调节gamma，或者自定义lut曲线达到这种高对比度效果。

                                            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.)

                                            H 1 Reply Last reply Reply Quote 0

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