1.当前系统镜像版本：J5 ISP
2.问题定位：在isp calibration工具中，gamma fe的模块导入了对应模组的我们确认正确的decompanding曲线之后，写入static 参数中，重新编译写到机器中。发现：
①LDR target 要写到比较低的值，画面正常 。
②在同样的环境，ovx8b 的sensor, J3 的曝光比HCG/VS 的值在1900 多,J5的曝光比在600 多，RAW 的亮度差异很大，J5的RAW 要比J3 的RAW 整体亮度明显要亮出很多，请问一下， 这种情况的RAW 是否合理，是否会对后期的ISP 处理有较大的影响？
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