Tool position and identification indicator displayed in a boundary area of a computer display screen
An apparatus comprises a memory device and a processor coupled to a display device, an image capture device, and the memory device. The processor is configured to: cause images captured by the image capture device to be displayed in a viewing area on the display device; determine a position of a tool in a reference frame of the image capture device; determine a position to display a non-depictive symbol for the tool in a boundary area circumscribing the viewing area to indicate a direction of the determined position of the tool relative to a field of view of the image capture device, by determining a trajectory of the tool; and cause the non-depictive symbol to be displayed at the determined position in the boundary area while images that were captured by the image capture device are restricted to being displayed in the viewing area.
1. An apparatus comprising:
a memory device non-transitorily storing program instructions; and
a processor coupled to a display device, an image capture device, and the memory device, the processor configured to execute the program instructions to:
cause images captured by the image capture device to be displayed in a viewing area on the display device;
determine a position of a tool in a reference frame of the image capture device, wherein the tool has a shaft and an end effector including opposing members coupled to the shaft;
determine a position to display a non-depictive symbol for the tool in a boundary area circumscribing the viewing area on the display device so as to indicate a direction of the determined position of the tool relative to a field of view of the image capture device, by determining a trajectory of the tool from current and past positions of the tool and by determining where an extrapolation of the trajectory enters the field of view of the image capture device, wherein the non-depictive symbol for the tool does not resemble the end effector of the tool in appearance, and wherein the position of the non-depictive symbol for the tool in the boundary area does not indicate a distance of the tool from the field of view of the image capture device; and
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area while images that were captured by the image capture device are restricted to being displayed in the viewing area on the display device.
2. The apparatus according to claim 1 , wherein the processor is further configured to execute the program instructions to:
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area so that the non-depictive symbol for the tool provides information identifying one of: the tool or a manipulator used for moving the tool.
3. The apparatus according to claim 2 , wherein the processor is further configured to execute the program instructions to:
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area so that the non-depictive symbol for the tool is marked with one of: a color that is uniquely associated with the manipulator or a number that is uniquely associated with the manipulator.
4. The apparatus according to claim 2 , wherein the processor is further configured to execute the program instructions to:
determine the position of the tool by using kinematics for the manipulator.
5. The apparatus according to claim 1 , wherein the processor is further configured to execute the program instructions to:
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area by:
determining a distance of a position of a reference point on the tool from a position of a reference point in the field of view of the image capture device; and
causing the non-depictive symbol for the tool to be displayed so that its size indicates the distance.
6. The apparatus according to claim 1 , wherein the processor is further configured to execute the program instructions to:
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area by:
determining a distance of a position of a reference point on the tool from a position of a reference point in the field of view of the image capture device; and
causing the non-depictive symbol for the tool to be displayed so that its color indicates the distance.
7. The apparatus according to claim 6 , wherein the processor is further configured to execute the program instructions to:
cause the non-depictive symbol for the tool to be displayed in the boundary area so that intensity of the color of the non-depictive symbol for the tool indicates the distance.
8. The apparatus according to claim 6 , wherein the processor is further configured to execute the program instructions to:
cause the non-depictive symbol for the tool to be displayed in the boundary area so that the color of the non-depictive symbol for the tool relative to a color spectrum indicates the distance.
9. The apparatus according to claim 1 , wherein the processor is further configured to execute the program instructions to:
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area by:
determining a distance of a position of a reference point on the tool from a position of a reference point in the field of view of the image capture device; and
causing the non-depictive symbol for the tool to be displayed so that a frequency of blinking of the non-depictive symbol for the tool indicates the distance.
10. The apparatus according to claim 1 , wherein the processor is further configured to execute the program instructions to:
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area by:
determining a distance of a position of a reference point on the tool from a position of a reference point in the field of view of the image capture device; and
causing the non-depictive symbol for the tool to be displayed so that a frequency of oscillation of the non-depictive symbol for the tool about the determined position in the boundary area indicates the distance.
11. The apparatus according to claim 1 , wherein the processor is further configured to execute the program instructions to:
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area by:
determining a distance of a position of a reference point on the tool from a position of a reference point in the field of view of the image capture device; and
causing the non-depictive symbol for the tool to be displayed so that the distance is indicated by overlaying a distance number over the non-depictive symbol for the tool.
12. The apparatus according to claim 1 , wherein the processor is further configured to execute the program instructions to:
determine the position of the tool by determining a position and an orientation of the end effector of the tool, and
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area by causing an orientation indicator to be displayed over the non-depictive symbol for the tool such that the orientation indicator is oriented so as to indicate the orientation of the end effector.
13. The apparatus according to claim 1 , wherein the processor is further configured to execute the program instructions to:
determine an orientation of an axis that extends along a length of a shaft of the tool, and
cause the non-depictive symbol for the tool to be displayed at the determined position in the boundary area by causing an orientation indicator to be displayed over the non-depictive symbol for the tool such that the orientation indicator is oriented so as to indicate the orientation of the axis.