thresholding background of a image

i have a rgb image [lesion] and its lesion_mask[appears black]. The lesion mask has value 0 outside the border,i.e, black and 1 on the border ,i.e, white and 2 [ colored] inside the border. i want to threshold the outside part of the border and overlay this mask on the lesion . can i do it with the following

lesion.*uint8(lesion_mask)

the lesion is attached

i am a beginner in image processing so your help with syntax will be appreciated

thank you

Answer 1

[Image Analyst]

I don't see the lesion mask image. For starters, study my attached masking demo.

[tilak tenneti]

i have attached the mask , please check since it has zero values on the background it appears black

[Image Analyst]

Then your segmentation algorithm is not effective. Choose a different one that will give you a mask that is not all zeros.