Resize your image using this ratio. The total image above is 1047 pixels wide, so 1047*2.177 = 2279 pixels wide. Once resized, you need to convert the image to a 1-bit bitmap image and save is somewhere. (As a sanity check before saying, this conversion should give you ~1400 pixels across the 14mm section for 1 pixel = 0.01mm).
Again, the way you do this will change from one image editing program to the next, but any decent image editor should support this. You should end up with a bitmap image like this: