How to save Mat as a 1-bit depth TIF file

1

The file I saved with imwrite(“test.tif”,dst) is 8 bits, but I want to save Mat as a 1-bit depth TIF file. How should I do it?
As shown in the following figure:

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2

a Mat’s type can’t be “1-bit”. that’s the first issue.

given a Mat of type CV_8U, flags to imwrite might support your goal… but I don’t see any appropriate IMWRITE_* flags. I could be mistaken.

Here’s the docs page where I would expect to find a flag, if it exists: OpenCV: Flags used for image file reading and writing

you’ll probably have to use a tiff library directly.

you could save a PNG. there seems to be IMWRITE_PNG_BILEVEL.