Perspective Puzzlery! Determine Distance and Angle of View Point, from a Rectangle, in a Digital Image.

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Given points; A - (341, 81) B - (265, 630) C - (884, 459) D - (896, 942) represent the coordinates of the corners of a rectangle in a digital photo.

The true distance of Line AB=CD is 24 inches and Line AC=BD is 18 inches.

How do you calculate the distance and angle of the "Camera" to the center of the rectangle. Would the answer be a vector?

Humans are weird, we can look at the image and solve it mentally, understanding the position of the camera... but how can you actually calculate such an answer.