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Filtering binarizing text base image for edge and contour detection on low contrast dark images

Hello,

I'm trying to extract bounding boxes of these numbers in this display but when I try to run simple and otsu threshold I'm getting some very unclear and distorted results no matter how much I adjust the simple thresh for the image

Any idea on how to still detect the edges of the digits on these kind of images with a relatively universal way to detect bounding boxes around the digits?

Thanks for

Filtering binarizing text base image for edge and contour detection on low contrast dark images

Hello,

I'm trying to extract bounding boxes of these numbers in this display display:

original_Image

but when I try to run simple and otsu threshold I'm getting some very unclear and distorted results like this:

image description

no matter how much I adjust the simple thresh for the image

Any idea on how to still detect the edges of the digits on these kind of images with a relatively universal way to detect bounding boxes around the digits?

Thanks for helping!