pub unsafe extern "C" fn ColorThresholdImage(
arg1: *mut Image,
arg2: *const PixelInfo,
arg3: *const PixelInfo,
arg4: *mut ExceptionInfo,
) -> MagickBooleanType
pub unsafe extern "C" fn ColorThresholdImage(
arg1: *mut Image,
arg2: *const PixelInfo,
arg3: *const PixelInfo,
arg4: *mut ExceptionInfo,
) -> MagickBooleanType