Save Image as BMP or PNG with a Bit Depth of 1

[BridgeCreek]

I need to save or export an image as a BMP or PNG file with a bit depth of 1.

I have spent hours trying to figure out how to do this.

Is this possible?  And if so, how can I do this?

I have the CC plan, so any CC product that has this capability will be fine with me.

Thank you to anyone who can assist with this.

[Semaphoric · Accepted solution]

If the image is RGB, change the mode to Grayscale. Then, change the mode to Bitmap. Save As a .BMP

[esmarjany]

At the first you should change image mode to bitmap (image/mode/grayscale)

then you should change image mode to bitmap (image/mode/bitmap)

finally save image as a bmp format with depth 1.