Yes—approximately. If you know the camera’s field of view and how many pixels the object spans, you can estimate the object’s angular size, then convert that to distance.

For a 1080p frame, the diagonal is about 2200 pixels. With a 75° diagonal field of view, each diagonal pixel corresponds to about:

75° / 2200 ≈ 0.034° per pixel ≈ 0.000594 radians per pixel.

So if the object measures N pixels along that same direction, its angular size is approximately:

angle ≈ N × 0.000594 radians

Then use:

distance = physical size / tan(angle)

For small angles, tan(angle) ≈ angle, so:

distance ≈ physical size / angle ≈ physical size × 1683 / N

This is only an approximation. It works best when:

• the stated field of view is accurate,
• you measure along the same axis the FoV refers to,
• the object is roughly perpendicular to the camera axis,
• the object is not too large in the frame.

If you don’t know focal length or sensor size, using field of view is the practical alternative. Otherwise, a known-size reference object in the same image can also be used for scaling.