Control device, imaging system, control method, and program for controlling imaging unit according to image capturing direction and zoom magnification

A control method for a control device, comprising:

• an acceptance step of accepting a specification of a specified region on a display screen of a display unit which displays an image captured by an imaging unit;
• a determination step of determining an image capturing direction and a zoom magnification for the specified region accepted in the acceptance step;
• and
• a control step of controlling the imaging unit on the basis of the image capturing direction and the zoom magnification determined by the determination step,
• wherein, in a coordinate system in which x denotes a pan direction and v denotes a tilt direction, when an upper limit value of a movable range in the pan direction is defined as Lx, when a center coordinate of the specified region is defined as (x0, y0) and horizontal and vertical sizes thereof are defined as (w0, h0), and when a center of an imaging region determined finally is defined as (X, Y) and horizontal and vertical sizes thereof are defined as (W, H),
• the control step changes the image capturing direction of the imaging unit such that equations of (X, Y)=(x0, y0), (W, H)=(w0, h0) hold in a case where the center of the specified region is within the movable range in the pan direction of the imaging unit, and
• the control step changes the image capturing direction of the imaging unit such that equations of X=Lx, W=w0+2×(x0−Lx), H=W×(h0/w0) hold in a case where the center of the specified region is not within the movable range in the pan direction of the imaging unit,
• wherein the acceptance step is executed by a processor or a combination of the processor and software,
• wherein the determination step is executed by a processor or a combination of the processor and software, and
• wherein the control step is executed by a processor or a combination of the processor and software.

A non-transitory computer-readable storage medium storing a program for executing a control method for a control device, the control method comprising:

• an acceptance step of accepting a specification of a specified region on a display screen of a display unit which displays an image captured by an imaging unit;
• a determination step of determining an image capturing direction and a zoom magnification for the specified region accepted in the acceptance step;
• and
• a control step of controlling the imaging unit on the basis of the image capturing direction and the zoom magnification determined by the determination step,
• wherein, in a coordinate system in which x denotes a pan direction and v denotes a tilt direction, when an upper limit value of a movable range in the pan direction is defined as Lx, when a center coordinate of the specified region is defined as (x0, y0) and horizontal and vertical sizes thereof are defined as (w0, h0), and when a center of an imaging region determined finally is defined as (X, Y) and horizontal and vertical sizes thereof are defined as (W, H),
• the control step changes the image capturing direction of the imaging unit such that equations of (X, Y)=(x0, y0), (W, H)=(w0, h0) hold in a case where the center of the specified region is within the movable range in the pan direction of the imaging unit, and
• the control step changes the image capturing direction of the imaging unit such that equations of X=Lx, W=w0+2×(x0−Lx), H=W×(h0/w0) hold in a case where the center of the specified region is not within the movable range in the pan direction of the imaging unit,
• wherein the acceptance step is executed by a processor or a combination of the processor and software,
• wherein the determination step is executed by a processor or a combination of the processor and software, and
• wherein the control step is executed by a processor or a combination of the processor and software.

A control device comprising:

• an acceptance unit configured to accept a specification of a specified region on a display screen of a display unit which displays an image captured by the imaging unit;
• a determination unit configured to determine an image capturing direction and a zoom magnification for the specified region accepted by the acceptance unit;
• and
• a control unit configured to control the imaging unit on the basis of the image capturing direction and the zoom magnification determined by the determination unit,
• wherein, in a coordinate system in which x denotes a pan direction and y denotes a tilt direction, when an upper limit value of a movable range in the tilt direction is defined as Ly, when a center coordinate of the specified region is defined as (x0, y0) and horizontal and vertical sizes thereof are defined as (w0, h0), and when a center of an imaging region determined finally is defined as (X, Y) and horizontal and vertical sizes thereof are defined as (W, H),
• the control unit changes the image capturing direction of the imaging unit such that equations of (X, Y)=(x0, y0), (W, H)=(w0, h0) hold in a case where the center of the specified region is within the movable range in the tilt direction of the imaging unit, and
• the control unit changes the image capturing direction of the imaging unit such that equations of Y=Ly, H=h1+2×(y0−Ly), W=H×(w0/h0) hold in a case where the center of the specified region is not within the movable range in the pan direction of the imaging unit,
• wherein the acceptance unit is realized by a processor or a combination of the processor and software,
• wherein the determination unit is realized by a processor or a combination of the processor and software, and
• wherein the control unit is realized by a processor or a combination of the processor and software.