[LabelAnnotator, RichLabelAnnotator, VertexLabelAnnotator] - allow text_color to be Union[Color, ColorPalette]

[SkalskiP]

Description

LabelAnnotator, RichLabelAnnotator, and VertexLabelAnnotator currently allow defining the background color as Union[Color, ColorPalette]. When the background color is a single Color, all boxes are drawn with the same color. If the background color is a ColorPalette, the detection index, class_id, or tracker_id is mapped to the corresponding color from the palette. Unfortunately, this functionality is not currently available for text_color.

Update LabelAnnotator, RichLabelAnnotator, and VertexLabelAnnotator to enable defining text_color as Union[Color, ColorPalette] and implement the same mechanism as for the background color.

Additional

• Note: Please share a Google Colab with minimal code to test the new feature. We know it's additional work, but it will speed up the review process. The reviewer must test each change. Setting up a local environment to do this is time-consuming. Please ensure that Google Colab can be accessed without any issues (make it public). Thank you! 🙏🏻

[Bhavay-2001]

Hi @SkalskiP, you can assign this to me. I'll take a look over thr weekend.

[SkalskiP]

@Bhavay-2001 Done ✅

[SkalskiP]

The expected change was added to LabelAnnotator and RichLabelAnnotator via #1387. @Bhavay-2001 would you be interested in adding this change to VertexLabelAnnotator as well?

[Bhavay-2001]

Sure

[SkalskiP]

@Bhavay-2001 thank you ;)