Detail-in-context lenses for navigation

A computer system comprising a processor and a memory having instructions that are executable on the processor to perform operations comprising:

• establishing an appearance of a lens for a region-of-interest in an image in an overhead view for display on a display screen, the image having a representation of an outer view of a vessel and a representation of a course for travel of the vessel, the appearance of the lens having:
• a focal region that is magnified;
• and
• a shoulder region, surrounding the focal region, having a magnification that provides a transition from the magnification of the focal region to the image that surrounds the shoulder region;
• and
• dynamically adjusting, by the computer system, an orientation of the appearance of the lens to follow a direction of travel of the vessel.

An article of manufacture including a computer-readable media having instructions stored thereon that, if executed by a computer system, cause the computer system to perform operations comprising:

• establishing an appearance of a lens for a region-of-interest in an image in an overhead view for display on a display screen, the image having a representation of an outer view of a vessel and a representation of a course for travel of the vessel, the appearance of the lens having:
• a focal region that is magnified;
• and
• a shoulder region, surrounding the focal region, having a magnification that provides a transition from the magnification of the focal region to the image that surrounds the shoulder region;
• and
• dynamically adjusting, by the computer system, an orientation of the appearance of the lens to follow a direction of travel of the vessel.

A computer system having a processor and memory having instructions that are executable on the processor to perform operations comprising:

• establishing an appearance of a lens for a region-of-interest in an image in an overhead view for display on a display screen, the image having a representation of an outer view of a vessel and a representation of a course for travel of the vessel, the appearance of the lens having:
• a focal region that is magnified;
• and
• a shoulder region, surrounding the focal region, having a magnification that provides a transition from the magnification of the focal region to the image that surrounds the shoulder region;
• and
• dynamically adjusting, by the computer system, an orientation of the appearance of the lens to follow a direction of travel of the vessel.

A method comprising:

• generating an appearance of a lens for a region-of-interest in an image in an overhead view by a computer system for display on a display screen, the appearance of the lens having:
• a focal region that is magnified;
• and
• a shoulder region, surrounding the focal region, having a magnification that provides a transition from the magnification of the focal region to the image that surrounds the shoulder region;
• and
• adjusting the appearance of the lens by the computer system based on a required notification time corresponding to a hazard in the image that is being approached by a representation of an outer view of a vessel on the display screen, the vessel being represented in the display on the display screen and the appearance of the lens being associated with the representation of the outer view of the vessel on the display screen.

A method comprising:

• generating an appearance of a lens for a region-of-interest in an image in an overhead view by a computer system for display on a display screen, the appearance of the lens having:
• a focal region that is magnified;
• and
• a shoulder region, surrounding the focal region, having a magnification that provides a transition from the magnification of the focal region to the image that surrounds the shoulder region;
• and
• adjusting the appearance of the lens by the computer system based on a feature density of a portion of the image that is being approached by a representation of an outer view of a vessel on the display screen, the appearance of the lens being associated with the representation of the outer view of the vessel on the display screen.

A method comprising:

• generating an appearance of a lens for a region-of-interest in an image in an overhead view by a computer system for display on a display screen, the appearance of the lens having:
• a focal region that is magnified;
• and
• a shoulder region, surrounding the focal region, having a magnification that provides a transition from the magnification of the focal region to the image that surrounds the shoulder region;
• and
• adjusting a size, a shape, or the magnification of the focal region and the shoulder region of the appearance of the lens by the computer system based on a speed of a vessel that is represented as a representation of an outer view of the vessel displayed on the display screen, the appearance of the lens being associated with the representation of the outer view of the vessel on the display screen.

A method comprising:

• generating an appearance of a lens for a region-of-interest in an image in an overhead view by a computer system for display on a display screen, the appearance of the lens having:
• a focal region that is magnified;
• and
• a shoulder region, surrounding the focal region, having a magnification that provides a transition from the magnification of the focal region to the image that surrounds the shoulder region;
• and
• adjusting an orientation of the appearance of the lens by the computer system based on movement of a vessel that is represented as a representation of an outer view of the vessel displayed on the display screen to follow a direction of travel of the vessel, the appearance of the lens being associated with the representation of the outer view of the vessel on the display screen such that a majority of an area of the appearance of the lens in the overhead view is positioned in front of the representation of the outer view of the vessel.