Vl53l8cx sharpener can not be set!

WeiJia · ‎2023-10-18

I am using the latest ULD driver of vl53l8cx. The sensor can work now. But when I use the function vl53l8cx_set_sharpener_percent to change the sharpener param, it does not work. There is no effection

on the distance.

I also used the vl53l5cx_set_sharpener_percent before, and it can work well.

So, Why does the vl53l8cx sharpener param can not be set ?

BR.

thanks.

Anne BIGOT · ‎2023-10-19

Dear Weija,

We doubled check on your side using the VL53L8CX GUI.
Indeed, the effect is not as visible as for the VL53L5CX but the sharpener correctly works.

We used a white 88% target at 10cm in half field of view. The effect is clearly visible when the sharpener is set at 0% or 10%.

The difference between the VL53L5CX and VL53L8CX is the lenses that are much sharpened for the VL53L8CX than for the VL53L5CX. So the sharpener algorithm effect seems less important.

Regards

Anne

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WeiJia · ‎2023-12-22

HI Anne

Thanks for your reply.

Now we use vl53l8x to detect the number of people passing by. The sensor hangs on top.

We need to identify the characteristics of the head and shoulder.

When people just walk into the FOV of the vl53l8x, we get the data and range status below:

(sharpener: 20% data freq: 15hz intergration time: 10ms)

frame 1:

1225 945 2010 585
1003 2120 921 869
2092 2114 2096 2046
2019 2092 2082 1150
5 255 255 9
5 5 5 5
5 5 5 5
9 5 5 5

frame2:

1237 277 865 559
1008 2126 912 854
2079 2112 2099 2049
2035 2094 2083 1150
5 4 255 5
5 255 5 9
5 5 5 5
5 5 5 5

frame 3:

1127 281 931 535
970 768 904 815
2072 322 2110 1135
2045 2094 2074 1133
5 5 255 5
5 255 5 9
5 5 5 5
5 5 5 5

frame 4:

1021 432 499 518
291 301 896 644
1866 326 2104 2050
2080 2102 2086 1150
5 5 4 5
4 4 5 9

255 5 5 5
5 5 5 5

You can see the range status is 255 some times. We do not know why ？

Our guess is that the range status is the side of the head or the side of the body.

Why ? Is there any mistake in our para settings?