Annotate a dataset of images

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if all you need is bounding boxes (and you're willing to do this manually), you could try the annotation tool from opencv/apps.

(it opens a directory, shows you image after image, lets you mark objects, and saves the outcome to a txt file)

https://dataturks.com/ provides Image Annotation and Labeling tool for open source and research projects. So if you are looking for manual annotation, you could give this tool a shot. Sample projects https://dataturks.com/projects/trending