making the line thin as equivalent to 1cm wide/pixel

I am providing few images like sample images/input images and desired output images respectively

sample images

desired output image which i want

all desired output images have width 1cm PIXEL

Answer 1

[Image Analyst]

Try bwmorph(bw, 'skel', inf) to skeletonize blobs.

[praveen rai]

i have tried this bwmorph(bw, 'skel', inf)

this type of image m getting

[praveen rai]

can i do threshold and then thin the line?? if yes how can it be done