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标题:
Action5 Pro 画质问题和分析猜测
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作者:
大熊猫很少在唐山旋转运镜
时间:
10-3 12:21
标题:
Action5 Pro 画质问题和分析猜测
[{"type":1,"key":"first-text","desc":"首发购入的Action 5 Pro，总感觉画质没以前的Action3好。一开始怀疑是Action3的锐化过度问题，但是手动给Action5的画面加了锐化，发现还是Action3的更好"},{"type":1,"key":"2dr8aqc3","desc":""},{"type":2,"multi_size":{"small":"https://bbs.djicdn.com/data/attachment/forum/202410/03/6245pUJHANi2TFlGQbLq.png@!550","large":"https://bbs.djicdn.com/data/attachment/forum/202410/03/6245pUJHANi2TFlGQbLq.png@!1920","extra_large":"https://bbs.djicdn.com/data/attachment/forum/202410/03/6245pUJHANi2TFlGQbLq.png@!2560","wide_450_360":"https://bbs.djicdn.com/data/attachment/forum/202410/03/6245pUJHANi2TFlGQbLq.png@!450x360","medium":"https://bbs.djicdn.com/data/attachment/forum/202410/03/6245pUJHANi2TFlGQbLq.png@!1200","square_360_360":"https://bbs.djicdn.com/data/attachment/forum/202410/03/6245pUJHANi2TFlGQbLq.png@!360x360","standard_640_360":"https://bbs.djicdn.com/data/attachment/forum/202410/03/6245pUJHANi2TFlGQbLq.png@!640x360"},"percent":1,"key":"2y189p6v","url":"https://bbs.djicdn.com/data/attachment/forum/202410/03/6245pUJHANi2TFlGQbLq.png"},{"type":1,"key":"x102xvtn","desc":"上图，左为Action5P，右为Action3。可以看到Action3的窗户更加清晰。Action3使用的是HDR模式4K30，Action5P使用的是视频模式4K30。"},{"type":1,"key":"dumayuuc","desc":""},{"type":1,"key":"2kz2fqdb","desc":"后来发现，Action5P的ISO是800起步的，最低也是600多。尝试手动设置为100，发现画质明显改善，细节丰富很多，和Action3一致了。但是，画面的动态范围明显下降。"},{"type":1,"key":"aalitoic","desc":""},{"type":2,"multi_size":{"small":"https://bbs.djicdn.com/data/attachment/forum/202410/03/4548DHRdqz3XjcCxPlIM.png@!550","large":"https://bbs.djicdn.com/data/attachment/forum/202410/03/4548DHRdqz3XjcCxPlIM.png@!1920","extra_large":"https://bbs.djicdn.com/data/attachment/forum/202410/03/4548DHRdqz3XjcCxPlIM.png@!2560","wide_450_360":"https://bbs.djicdn.com/data/attachment/forum/202410/03/4548DHRdqz3XjcCxPlIM.png@!450x360","medium":"https://bbs.djicdn.com/data/attachment/forum/202410/03/4548DHRdqz3XjcCxPlIM.png@!1200","square_360_360":"https://bbs.djicdn.com/data/attachment/forum/202410/03/4548DHRdqz3XjcCxPlIM.png@!360x360","standard_640_360":"https://bbs.djicdn.com/data/attachment/forum/202410/03/4548DHRdqz3XjcCxPlIM.png@!640x360"},"percent":1,"key":"6qi0g26j","url":"https://bbs.djicdn.com/data/attachment/forum/202410/03/4548DHRdqz3XjcCxPlIM.png"},{"type":1,"key":"u97klqjw","desc":"上图均为Action5P拍摄，左侧为自动模式，右侧为手动设置ISO100，局部放大。可以看到右侧细节更加丰富，但天空明显过曝。"},{"type":1,"key":"9m4njwyo","desc":"因此，猜测Action5P使用的是Quad Bayer四拜尔传感器，利用相邻像素点的高低ISO实现的高动态范围；而Action3使用的则是长短帧。为了实现高动态范围，ISO需要提高，类似Log模式下需要高ISO。较高的ISO加上降噪算法，使得画质变差。"},{"type":1,"key":"uy1g358l","desc":""},{"type":1,"key":"agdzt8zo","desc":"希望工程师能够解答这个问题，并对此进行优化。"},{"type":1,"key":"87ug808l","desc":""}]
作者:
大熊猫很少在唐山旋转运镜
时间:
10-12 08:58
可能是个例问题，换新机了
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