Man, if you want to show
the purposes of Starvis 2 (not the A139P) you should compare a Starvis 2 dashcam with a Starvis dashcam, but:
- the resolution to be the same
- the image sensor to be the same.
Until IMX675 will be available on a dashcam we can not see the real
purposes of Starvis 2. Then you can compare Starvis 2 from IMX675 with Starvis from IMX335.
In your comparisons there is one 4K snapshot compared to a 2K snapshot and this only shows the superiority of 4K over 2K but and on the A139 Pro vs A129 Pro we have a bigger size of a CMOS over a smaller size. If using same quality lens for sure will win A139 Pro.
But the story was not about how good is the A139 Pro but about the unproven purposes until now of Starvis 2 generally.
I am very sure that A139 Pro is better than A229 or A129 Pro or than any dashcam for the market right now, but this is not only because of Starvis 2. The biggest advantage is the size of the sensor, no matter the Starvis version. Then come the Starvis 2, but this is only at night and not during day. Then it come the HDR version which is better that DOL HDR (from Starvis 2) because it is using just one frame to balance the image brightness and not two frames like on Starvis 2.
Such creation of Clear HDR technology from Starvis 2 should have better results at least during day in a way to reduce the motion blur during day. We all know that DOL HDR is not good during day but only at night and most of us expected a no motion blur on Clear HDR. This will not happen perfect, some motion blur will still remain even it is processed one frame. The under exposing and over exposing at such speed of creating a frame will create some blur. Just imagine that you are in a dark room and you will turn the light, the room is not instant bright and for a dashcam also the image is created when dashcam is moving.
To test what I said, during day just park the car with HDR enabled on a static scene with bright sun and shadows and you will see no motion blur compared to the moving car at the same scene. So HDR is now bad at day, it is just not so good for moving scenes when you want details.
But why the HDR is really better at night even when the car is moving? First, it is better for big license plates from Europe (for example, Mr. Dashmellow) which are also white. Being big with so much white, the car headlights are reflecting a lot of light. Having so much light is more easy to obtain contrast with the characters printed on the plate and better results to read them.
If you will look around the car at high speed you will see all image fuzzy but the European plate (for example) is the most visible from all scene. Why? Because of too much light reflected from the license plate which is creating the good conditions expected by the HDR technology. But with USA plates (for example, Mr, Dashmellow) there is not too much white to reflect. I saw plates in combined colors, not full white and for example in California de plate can be black. I even don't know if the all USA plate (for example) area is full reflective (except characters, of course!). The black one for California is not.
So americans (for example) will be not so interested of HDR during night but for HDR during day, hoping their license plates will be more visible.
Also not forget that at sunrise and sunset because of too less light nothing is helping, not the Clrear HDR, not the Starvis 2, not the EU (style) plate. Looking for details in such conditions is wasting of time and only a bigger CMOS and/or a telephoto lens can help until the car headlights will bring more light than natural light.
All above are my ideas and also my experience. not read any guide or book regarding this so there is a (small
![Smile :) :)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png)
) change to wrote some mistakes (1-2
![Smile :) :)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png)
).