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Extract a portion of an image

Natash A
Posted 5 years ago

I've got an image and I want to obtain the centerlines of the image. (Input image) I could obtain the centerlines using the following commands

img = Input_image
gray = ImagePad[ImageCrop[ColorConvert[img, "Grayscale"], ImageDimensions[img] - 6],10]
bin = Binarize[gray, 0.07]
skeleton = Pruning[Pruning@Thinning[bin], 15]

Now, I would like to obtain the centerlines for a particular region of the original image ( the region below the white marking - image). Could someone suggest how this can be done?
POSTED BY: Natash A
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AHA!! RemoveBackground did it. Problem solved!! Thanks

RJB
POSTED BY: Roger J Brown

That worked great, Thanks. But I still have the black background. I need that transparent. I will fiddle with Opacity to see if that works but if you have a better way please send it along.
POSTED BY: Roger J Brown

I have accomplished all of what is shown here successfully but have not been able to restore the B/W region to its original. ColorConvert does not seem to be the answer. What I am after is just the large foot in the attached notebook. Could you help me with this last step? Thanks.
POSTED BY: Roger J Brown
Rohit Namjoshi
Rohit Namjoshi
Posted 4 years ago

Hi Roger,

To apply a mask to an image, use ImageMultiply. 

ImageMultiply[img, reg]
POSTED BY: Rohit Namjoshi
POSTED BY: Mikayel Egibyan
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