How to apply mask to an image with different grey scale values?

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How to apply mask to an image with different grey scale values?

Posted by - Latinos MediaSyndication -

on - July 2, 2023 -

Filed in - Technology -

434 Views - 0 Comments - 0 Likes - 0 Reviews

I'm trying to apply this mask to the original image

Notice there are some grey areas, I want to keep everything except PURE black.

I've found this code

 func maskImage(image: UIImage, mask: UIImage) -> UIImage {
    let imageReference = (image.cgImage)!
    let maskReference = (mask.cgImage)!

    let imageMask = CGImage(
        maskWidth: maskReference.width
        , height: maskReference.height
        , bitsPerComponent: maskReference.bitsPerComponent
        , bitsPerPixel: maskReference.bitsPerPixel
        , bytesPerRow: maskReference.bytesPerRow
        , provider: maskReference.dataProvider!
        , decode: nil
        , shouldInterpolate: true
    )

    return (UIImage(cgImage: (imageReference.masking(imageMask!))!))
}

But it does the opposite, it removes all white pixels instead.

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