Abstract: A method performs at least one of adjusting, calibrating and monitoring a focus value of a surgical microscope including at least one objective, an image capture device and a zoom system, wherein the surgical microscope is configured to be operated in at least two different zoom positions. The method provides for at least two different zoom positions, capturing at least one image of a specified object via the image capture device; via the at least one captured image, determining a plurality of contrast values depending on the focus value; and, via the determined contrast values for the at least two zoom positions, ascertaining at least one desired value for at least one of the following: i) at least one parameter for adjusting the focus value of the surgical microscope; and, ii) at least one parameter for calibrating the focus value of the surgical microscope.

Abstract: A method for creating a camera model for a camera of a surgical microscope includes positioning a calibration object in an initial pose in an observation region of the camera, determining a pose delta for reaching a first pose for the calibration object in a measurement space of the camera starting from the initial pose, positioning the calibration object in the first pose in accordance with the determined pose delta, making a recording of the calibration object in the first pose with the camera, positioning the calibration object in at least one further pose, making a recording of the calibration object in the at least one further pose, and creating a camera model based on the recordings made, the first pose and the at least one further pose being chosen with a distribution in the measurement space such that a camera model is obtained which represents the entire measurement space.

Abstract: A method and a system for calibrating cameras of a multichannel medical visualization system, including capturing a capturing region respectively imaged via channels of the multichannel medical visualization system by a respective camera, determining a magnification center for each of the channels, setting at least two magnification levels of a common mechanical magnification optical unit, identifying an image region which does not move or which moves the least across the magnification levels for each of the channels in image representations which are captured, and, proceeding from the respectively determined magnification centers, defining an image portion for each of the channels in the captured image representations with the respectively identified magnification center as the center, and restricting an output of the captured image representations at all magnification levels to the image portion defined for the respective channel.

Abstract: A method for creating a camera model for a camera of a surgical microscope includes positioning a calibration object in an initial pose in an observation region of the camera, determining a pose delta for reaching a first pose for the calibration object in a measurement space of the camera starting from the initial pose, positioning the calibration object in the first pose in accordance with the determined pose delta, making a recording of the calibration object in the first pose with the camera, positioning the calibration object in at least one further pose, making a recording of the calibration object in the at least one further pose, and creating a camera model based on the recordings made, the first pose and the at least one further pose being chosen with a distribution in the measurement space such that a camera model is obtained which represents the entire measurement space.