![]() ![]() Calibration of focal length, vertical lens shift, position and rotation (Solve Focal+Y) To reposition, rotate and/or scale the generated rectangle, be sure to reposition, rotate and/or scale the camera along with it.Īlso, see the options below. The original plane can be hidden or deleted to make the new plane visible. It can safely be changed after the calibration.Īlso, the original plane may obstruct the view of the reconstructed rectangle when not in wireframe mode. Warning: If the background image is set to 'Top' mode, then it will not be visible in camera view. The name of the reconstructed rectangle is the one of the original plane, with "_Cal" appended. (This can be changed in an option, see below.) The view changes automatically to the camera and a new object is created that represents the reconstructed rectangle.īy design, this rectangle is parallel to the x-y-plane, at the 3D cursor location. ![]() This sets the position, the rotation and the focal length of the camera. In the 3D view tools (on the left side of the 3D view), select the Tools tab and find the Camera Calibration PVR menu. Enter Edit mode ( Tab key) and move the plane vertices to the corners of the rectangle in the background image.Create a new Plane ( Shift-A -> Mesh -> Plane).Optional: Got to wireframe mode (press Z).Ensure that the image is visible from top view by using either the option All Views or Top. Load a background image for the 3D View by the 3D view properties (on the right side of the 3D view, after pressing N).Change the 3D view into Top Ortho mode (Top view in Orthographic View mode: press Numpad 7, then Numpad 5).The rectangle used for reference may not have any parallel edges.Ĭalibration of focal length, position and rotation (Solve Focal) This is often useful when the image was cropped. Solve Focal+X+Y: This is the more general mode that allows for shift in both vertical and horizontal direction.Therefore, the reference rectangle is required to have exactly two parallel edges. This mode assumes the lens was set up in such a way that vertical lines appear vertical in the image. Solve Focal+Y: This is a special mode often used for architectural images where a tilt-shift lens was used.Furthermore, it can not be used if any two edges of the rectangle appear parallel in the image. However, it does not work if the photograph was taken with a tilt-shift lens and/or was cropped. Solve Focal: Uses the image of a single rectangle to calibrate the camera.There are three modes that can be used to calibrate the camera: From startup the panel is located in the TOOLS panel, you can change this in the preference in the addon panel. ![]()
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