The apply_color_formula function is failing to apply color_formula

[kirangkumar]

The apply_color_formula function is failing to apply color_formula

[kirangkumar]

@vincentsarago Sorry was busy with other stuffs, the rio-tiler version I am using is 4.1.10 which is greater than 4.1.6. So I feel it should work

[kirangkumar]

@vincentsarago thanks for all the support. I can confirm it is working for me. Thanks again, closing the issue

[vincentsarago]

Hi @kirangkumar,

• what version of titiler are you using?
• are you using a custom factory?
• can you share the full URL you're trying to use
• if you can, remove https://github.com/developmentseed/titiler/blob/main/src/titiler/application/titiler/application/main.py#L114 then we will get a full error logs

[kirangkumar]

Hi @vincentsarago here are answers to your questions:

1. what version of titiler are you using?

• I am using the latest version titiler from main branch

2. are you using a custom factory?
   No I am not using custom factory
3. can you share the full URL you're trying to use
   The URL is http://127.0.0.1:9070/stac/preview?format=png&url=https://planetarycomputer.microsoft.com/api/stac/v1/collections/landsat-8-c2-l2/items/LC08_L2SP_229061_20220324_02_T1&assets=SR_B4&assets=SR_B3&assets=SR_B2&color_formula=gamma+RGB+2.7%2C+saturation+1.5%2C+sigmoidal+RGB+15+0.55
4. Error message:
   Hope this is sufficient:

  File "/Users/kiran/pixxel/titiler/venv/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 867, in run
    result = context.run(func, *args)
  File "/Users/kiran/pixxel/titiler/src/titiler/core/titiler/core/factory.py", line 914, in preview
    image.apply_color_formula(color_formula)
  File "/Users/kiran/pixxel/titiler/venv/lib/python3.10/site-packages/rio_tiler/models.py", line 551, in apply_color_formula
    self.array.data = scale_dtype(ops(to_math_type(out)), numpy.uint8)
AttributeError: can't set attribute 'data'

[vincentsarago]

the latest titiler shouldn't be used with rio-tiler <4.1.6

https://github.com/developmentseed/titiler/blob/main/src/titiler/core/pyproject.toml#L38

[vincentsarago]

also note that with stac you'll need to set asset_as_band=True to work with single band stored as multiple files

[vincentsarago]

any update @kirangkumar ?

[kirangkumar]

Here's the details about rio-tiler version I am using.

[kirangkumar]

And I am using one band in one file, so I guess, asset_as_band=True is not required. But I tried that option too before creating the issue, since there was no luck, I thought of asking help here

[vincentsarago]

Wait, It seems you are using rio-tiler from dev branch not the one from pypi!

Dev

rio-tiler/rio_tiler/models.py

Line 551 in aed8893

out = scale_dtype(ops(to_math_type(out)), numpy.uint8)

4.1.10

rio-tiler/rio_tiler/models.py

Line 604 in d216ab0

data = scale_dtype(ops(to_math_type(data)), numpy.uint8)

I should update the version in the GitHub branch to avoid confusion, sorry about this

[kirangkumar]

@vincentsarago No worries, thanks for the quick help. I will upgrade my code from dev to main. Can you please let me know what is the version in main?

[vincentsarago]

main should be 4.1.10

[vincentsarago]

this should be fixed with latest commit ee1d7c4

please could you close the issue once you confirm it's resolved on your side 🙏