Device for tracking adjustment and tracking adjustment method

Patent metadata

Field	Value
Publication number	US-9304183-B2
Application number	US-201414577594-A
Country	US
Kind code	B2
Filing date	Dec 19, 2014
Priority date	Jun 25, 2012
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A device for tracking adjustment comprising a zoom instruction input device, a focus instruction input device, a tracking instruction input device, an image signal obtaining device, a determining device which determines whether a state is a first adjustment state in which the zoom lens is set by the zoom instruction input device at a position on a tele side and the focus lens is moved by the focus instruction input device or a second adjustment state in which the zoom lens is set by the zoom instruction input device at a position on a wide side and the tracking lens is moved by the tracking instruction input device, an area setting device, an evaluation value generating device, and a display device, wherein the determining device determines whether the state is the first adjustment state or the second adjustment state based on the image signal obtained from the camera device.

First claim

What is claimed is:

1. A device for tracking adjustment comprising:
a zoom instruction input device to which an instruction for moving a zoom lens movable to change a focal length is inputted;
a focus instruction input device to which an instruction for moving a focus lens movable to focus on a subject is inputted;
a tracking instruction input device to which an instruction for moving a tracking lens movable to change a position of an image plane is inputted;
an image signal obtaining device which obtains an image signal from a camera device having a lens device mounted thereon, the camera device having the zoom lens, the focus lens, and the tracking lens;
a determining device which determines whether a state is a first adjustment state in which the zoom lens is set by the zoom instruction input device at a position on a tele side and the focus lens is moved by the focus instruction input device or a second adjustment state in which the zoom lens is set by the zoom instruction input device at a position on a wide side and the tracking lens is moved by the tracking instruction input device;
an area setting device which sets a detection area for detecting a focus state of the lens device with respect to the image signal obtained by the image signal obtaining device, the area setting device switching a size of the detection area between the first adjustment state and the second adjustment state based on the determination result of the determining device;
an evaluation value generating device which generates an evaluation value indicating the focus state of the lens device from the image signal obtained by the image signal obtaining device, the evaluation value generating device generating the evaluation value within the detection area set by the area setting device in an entire screen region of the image signal; and
a display device which displays the evaluation value generated by the evaluation value generating device, wherein
the determining device determines whether the state is the first adjustment state or the second adjustment state based on the image signal obtained from the camera device
wherein the evaluation value generating device generates a graph in a format different between the first adjustment state and the second adjustment state, and
the display device displays the graph generated by the evaluation value generating device;
wherein the evaluation value generating device generates a first graph representing changes of the evaluation value of the focus state with respect to changes of a position of the focus lens when the state is the first adjustment state, and generates a second graph in a bar shape representing the evaluation value of the focus state corresponding to a current position of the tracking lens when the state is the second adjustment state.

2. The device for tracking adjustment according to claim 1 , wherein
the area setting device sets the size of the detection area in the second adjustment state smaller than the size of the detection area in the first adjustment state.

3. The device for tracking adjustment according to claim 1 , wherein
the area setting device extracts an image of a specific still subject from the image signal, and switches the size of the detection area according to a size of the extracted image.

4. The device for tracking adjustment according to claim 2 , wherein
the determining device determines whether the state is the first adjustment state or the second adjustment state based on a zoom position signal indicating a position of the zoom lens outputted from one of the zoom instruction input device and the lens device.

5. The device for tracking adjustment according to claim 2 , wherein
the determining device determines whether the state is the first adjustment state or the second adjustment state based on an input operation by a user.

6. A tracking adjustment method using a zoom instruction input device to which an instruction for moving a zoom lens movable to change a focal length is inputted, a focus instruction input device to which an instruction for moving a focus lens movable to focus on a subject is inputted, and a tracking instruction input device to which an instruction for moving a tracking lens movable to change a position of an image plane is inputted, the method comprising:
a determining step of determining whether a state is a first adjustment state in which the zoom lens is set by the zoom instruction input device at a position on a tele side and the focus lens is moved by the focus instruction input device or a second adjustment state in which the zoom lens is set by the zoom instruction input device at a position on a wide side and the tracking lens is moved by the tracking instruction input device;
an area setting step of setting a detection area for detecting a focus state of the lens device with respect to the image signal obtained from a camera device having a lens device mounted thereon, the camera device having the zoom lens, the focus lens, and the tracking lens, the area setting step of switching a size of the detection area between the first adjustment state and the second adjustment state based on the determination result in the determining step;
an evaluation value generating step of generating an evaluation value indicating the focus state of the lens device from the obtained image signal, the evaluation value generating step of generating the evaluation value within the detection area set by the area setting step in an entire screen region of the image signal; and
a display step of displaying the evaluation value generated in the evaluation value generating step, wherein
in the determining step, it is determined whether the state is the first adjustment state or the second adjustment state based on the image signal obtained from the camera device
wherein in the evaluation value generating step, a graph is generated in a format different between the first adjustment state and the second adjustment state, and in the displaying step, the graph generated in the evaluation value generating step is displayed;
wherein in the evaluation value generating step, a first graph is generated when the state is the first adjustment state, the first graph representing a position of the focus lens when the evaluation value indicating the focus state becomes maximum with respect to changes of the position of the focus lens, and a second graph in a bar shape is generated when the state is the second adjustment state, the second graph in which the evaluation value indicating the focus state changes according to changes of a position of the tracking lens.

7. The tracking adjustment method according to claim 6 , wherein
in the area setting step, the size of the detection area in the second adjustment state is set smaller than the size of the detection area in the first adjustment state.

8. The tracking adjustment method according to claim 6 , wherein
in the area setting step, an image of a specific still subject is extracted from the image signal, and the size of the detection area is switched according to a size of the extracted image.

9. The tracking adjustment method according to claim 7 , wherein
in the determining step, it is determined whether the state is the first adjustment state or the second adjustment state based on a zoom position signal indicating a position of the zoom lens outputted from one of the zoom instruction input device and the lens device.

10. The tracking adjustment method according to claim 7 , wherein
in the determining step, it is determined whether the state is the first adjustment state or the second adjustment state based on an input operation by a user.

11. A non-transitory comput

Assignees

• Fujifilm Corp

Inventors

• Sasaki Tadashi
• Yamashita Junji

Classifications

• H04N23/631

  Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters · CPC title

• G02B7/28 Primary

  Systems for automatic generation of focusing signals · CPC title

• H04N23/69

  Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming · CPC title

• H04N23/635

  Region indicators; Field of view indicators · CPC title

• H04N23/66

  Remote control of cameras or camera parts, e.g. by remote control devices · CPC title