Question about read the ome tiff

Hi!
I use `io.read_ometiff` to import my ome tiff image. However I found that all the pixels in the array is [r_value, 128, 128].
Here is my code:
`tiff = apeer_ometiff_library.io.read_ometiff('./28.ome.tif')
print(tiff[0])`
And the output was:
```
[[[[[238 128 128]
[238 128 128]
[238 128 128]
...
[238 128 128]
[239 128 128]
[237 128 128]]

[[238 128 128]
[238 128 128]
[238 128 128]
...
```
It seems that all the g_value and b_value of the RGB image were replaced to 128.
I tried to use the `def apply_3d_trafo_rgb(trafo_3d, array_5d, **kwargs):`,but I have no idea what the arguemet `trafo_3d` is.
So is ther any demo about how to use the module? Or how can I solve this problem?