JP2018014766A - Imaging system and imaging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve various problems when simultaneously generating a plurality of videos having different dynamic ranges such as HDR video and SDR video, from pixel signals captured by an imaging section.SOLUTION: An imaging system includes: an imaging section for obtaining a pixel signal by imaging a subject; and a processing circuit for generating a first video signal of a first dynamic range from the pixel signal generated by the imaging section, and generating a second video signal of a second dynamic range having correlation with respect to the first dynamic range.SELECTED DRAWING: Figure 1

Description

  The present technology relates to an imaging system and an imaging method capable of generating two types of videos having different dynamic ranges from pixel signals obtained by imaging with an imaging device.

  In HDR (High Dynamic Range) imaging, it is possible to express images with a wide dynamic range, and could not be expressed with SDR (Standard Dynamic Range) image signals with a standard dynamic range that can be displayed on a normal monitor. It is possible to express high brightness and color with high brightness.

  Patent Document 1 discloses a method for encoding HDR video and LDR video together.

Special table 2015-506623 gazette

  An object of the present technology is to solve various problems in the case of simultaneously generating a plurality of videos having different dynamic ranges such as HDR video and SDR video from pixel signals captured by an imaging unit.

  In order to solve the above-described problem, an imaging system according to an embodiment of the present technology includes a first video having a first dynamic range from the pixel signal generated by an imaging unit that captures a subject and obtains a pixel signal. A processing circuit is provided for generating a signal and generating a second video signal having a second dynamic range having a correlation with the first dynamic range.

  According to this imaging system, HDR video and SDR video can be simultaneously generated by the processing circuit from the pixel signal obtained by the imaging unit. In this imaging system, since the processing circuit generates a second video signal having a second dynamic range having a correlation with the first dynamic range of the first video signal from the pixel signal, the first adjustment is performed by iris adjustment. When the apparent brightness of the video signal is changed, an equivalent change can be given to the apparent brightness of the second video signal created simultaneously with the first video signal.

  The processing circuit sets the second dynamic range based on the first dynamic range based on information for setting a correlation between the first dynamic range and the second dynamic range. It may be configured.

  The processing circuit correlates a ratio between a first gain for the pixel signal for generating the first video signal and a second gain for the pixel signal for generating the second video signal. It may be configured to set based on information for setting.

  The processing circuit may be configured to generate the first video signal having the first dynamic range from a signal obtained by performing gamma signal processing on the pixel signal.

  The first video signal may be SDR (Standard Dynamic Range) video, and the second video signal may be HDR (High Dynamic Range) video.

  The imaging system according to the present technology may further include a display that displays the first video signal generated by the processing circuit.

  In the imaging system according to the present technology, the display may be a viewfinder.

  The processing circuit may perform processing for displaying a correlation between the first dynamic range and the second dynamic range on the display based on information for setting the correlation.

  The imaging system according to the present technology may perform an iris adjustment process based on an iris adjustment input when the first video signal is displayed on the display.

An imaging method that is another aspect of the present technology is:
The imaging unit images a subject and generates a pixel signal,
A processing circuit generates a first video signal having a first dynamic range from the pixel signal generated by the imaging unit, and a second dynamic range having a correlation with the first dynamic range. Generate a video signal.

A program that is another aspect of the present technology is:
A first video signal having a first dynamic range is generated from the pixel signal generated by an imaging unit that images a subject and obtains a pixel signal, and a second dynamic having a correlation with the first dynamic range is generated. A program for operating a computer as a processing circuit for generating a second video signal in a range.

An imaging device which is still another aspect according to the present technology,
An imaging unit that captures a subject and obtains a pixel signal;
A first video signal having a first dynamic range is generated from the pixel signal generated by the imaging unit, and a second video signal having a second dynamic range having a correlation with the first dynamic range is generated. And a processing circuit to be generated.

  As described above, according to the present technology, it is possible to solve various problems in the case where a plurality of videos having different dynamic ranges, such as HDR video and SDR video, are simultaneously generated from pixel signals captured by the imaging unit.

1 is a block diagram showing an overall hardware configuration of an imaging system 1 of a first embodiment according to the present technology. FIG. 2 is a block diagram illustrating a functional configuration of an HDR process unit 22 and an SDR process unit 23 in the imaging system 1 of FIG. 1. It is a figure which shows the relationship of the dynamic range of SDR video at the time of 1: 1 setting, and HDR video. It is a figure which shows the relationship of the dynamic range of each SDR video and HDR video at the time of HDR-contrast 2 time setting. It is a figure which shows the relationship of the dynamic range of each SDR video and HDR video at the time of SDR-D-Range-Gamma350% setting. It is a figure which shows the relationship of the dynamic range of each of SDR video and HDR video at the time of HDR contrast 2 time & SDR-D-Range-Gamma220% setting. It is a block diagram showing modification 1 of the imaging system concerning this art. It is a block diagram showing modification 2 of the imaging system concerning this art. It is a block diagram showing modification 3 of the imaging system concerning this art. It is a block diagram showing modification 4 of the imaging system concerning this art.

Hereinafter, embodiments according to the present technology will be described.
<First Embodiment>
[Imaging system hardware configuration]
FIG. 1 is a block diagram illustrating an overall hardware configuration of the imaging system according to the first embodiment of the present technology.
As shown in FIG. 1, the imaging system 1 includes an imaging device 10 and a camera control unit 20. The imaging device 10 and the camera control unit 20 are connected through a camera cable 30 such as an optical fiber.

  The imaging apparatus 10 includes an optical system 11 having a lens group for imaging, an imaging element 12, a preprocessor 13, a transmission unit 14, and a CPU 15.

  The image sensor 12 is an image sensor such as a complementary metal-oxide-semiconductor (CMOS) element or a charge-coupled device (CCD), and converts the light taken in through an optical system (not shown) into an electrical pixel signal corresponding to the light intensity. Convert.

  In the configuration of the imaging system of the present technology, the “imaging unit” corresponds to the imaging device 10 described above.

  The preprocessor 13 performs signal correction processing such as defect correction and lens aberration correction on the pixel signal obtained by the image sensor 12.

  The transmission unit 14 performs processing for transmitting the pixel signal output from the preprocessor 13 to the camera control unit 20 through the camera cable 30. That is, the pixel signal transmitted to the camera control unit 20 by the transmission unit 14 is a RAW image signal that has not been subjected to processing relating to gain or dynamic range, debayer processing, gamma signal processing, or the like.

  On the other hand, the camera control unit 20 includes a transmission unit 21, an HDR process unit 22, an SDR process unit 23, and a CPU 24.

  The transmission unit 21 receives the pixel signal transmitted from the imaging device 10 through the camera cable 30 and supplies it to the HDR process unit 22 and the SDR process unit 23.

The HDR process unit 22 performs processing for generating HDR video from the pixel signal supplied from the transmission unit 21.
The SDR process unit 23 performs processing for generating SDR video from the pixel signal supplied from the transmission unit 21.
The HDR process unit 22 and the SDR process unit 23 are configured by one or a plurality of integrated circuits, and correspond to a processing circuit in the configuration of the present technology.

  The CPU 24 is a controller that controls each unit in the camera control unit 20. The CPU 24 can communicate with the operation device 40 connected via a communication path 50 such as a LAN (Local Area Network). The operation device 40 includes a display 41, an operation input unit 42, and a control unit 43. The operation device 40 may be configured by an information processing device such as a personal computer, or may be configured by a dedicated control panel or the like made for camera control. The operation input unit 42 may be configured with, for example, operation keys, a mouse, a trackball, a dial, a lever, a touch sensor panel, a remote controller, and the like. The control unit 43 of the operation device 40 is configured by a circuit such as a CPU, receives various control commands and setting information from a producer such as a VE (Video Engineer), and communicates with the CPU 24 of the camera control unit 20 via the communication path 50. Communicate between.

  Next, the configuration of the HDR process unit 22 and the SDR process unit 23 in the camera control unit 20 will be described.

[HDR process unit 22 and SDR process unit 23]
FIG. 2 is a block diagram showing a functional configuration of the HDR process unit 22 and the SDR process unit 23.

  The HDR process unit 22 includes an HDR gain adjustment unit 221, a matrix processing unit 223, a black level correction unit 225, a detail processing unit 227, an OETF unit 228, and a formatter 229.

The HDR gain adjustment unit 221 controls the RGB gain for white balance adjustment in addition to the master gain control.
The matrix processing unit 223 obtains color image data by performing debayer processing, linear matrix processing, and the like on the pixel signal that has passed through the HDR gain adjustment unit 221.

The black level correction unit 225 corrects the black level of the color image data.
The detail processing unit 227 performs detail processing of color image data.
The OETF unit 228 performs tone compression on the color image data using HDR OETF (Optical-Electro Transfer Function) and performs gamma signal processing.
The formatter 229 converts the color image data that has passed through the OETF unit 228 into an HDR video transmission format.

Next, the configuration of the SDR process unit 23 will be described.
The SDR processing unit 23 includes a resolution conversion unit 230, an SDR gain adjustment unit 231, a matrix processing unit 233, a black level correction unit 235, a knee detail processing unit 237, a gamma processing unit 238, and a formatter 239.

  The resolution conversion unit 230 converts the resolution (for example, 4K resolution) of the pixel signal transmitted from the imaging device 10 into a resolution such as HD.

  The SDR gain adjustment unit 231 performs master gain control based on the relative gain and RGB gain control for white balance adjustment. Here, the relative gain is information for setting a correlation between the dynamic range of the SDR video (first dynamic range) and the dynamic range of the HDR video (second dynamic range). The SDR gain adjustment unit 231 adjusts the ratio of the master gain of the SDR gain adjustment unit 231 to the master gain of the HDR gain adjustment unit 221 based on this relative gain. The relative gain is set by the CPU 24 for the SDR gain adjustment unit 231.

The matrix processing unit 233 obtains color image data by performing debayer processing, linear matrix processing, and the like on the pixel signal that has passed through the SDR gain adjustment unit 231.
The black level correction unit 235 corrects the black level of the color image data.
The knee detail processing unit 237 performs knee (KNEE) correction and detail processing on the color image data.

The gamma processing unit 238 performs gamma processing for the dynamic range for SDR set in the SDR gain adjustment unit 231 and gamma processing for display.
The formatter 239 converts the color image data into an SDR video transmission format.

[Problem to be solved by the imaging system 1 of the present embodiment]
In HDR video, since the dynamic range is wide, video breakdown due to overrange is unlikely to occur, and even if the luminance standard of shooting changes, the video is displayed as it is. However, on the other hand, the video is too bright than the level intended by the creator, and the expression of brightness tends to vary from scene to scene.

  In typical HDR video production, the pixel signals obtained by the imaging device are recorded as linearly as possible in a wide dynamic manner, and by finely adjusting the video signal so that it is suitable for viewing in post-production. , HDR video of the brightness intended by the producer is obtained. However, for example, in HDR live broadcasting such as sports broadcasting, HDR video must be created in real time. Therefore, some luminance standard is required for HDR photography, but such a standard does not exist yet.

  Although HDR imaging is expected to become the mainstream in the field of video shooting in the future, it is considered that the coexistence of HDR video and SDR video will continue for some time. For this reason, an imaging system suitable for the coexistence situation of HDR video and SDR video is required. The imaging system of the present embodiment can solve at least the above problems.

  Note that the luminance dynamic range of HDR video is wider than the luminance dynamic range of SDR video. For example, if the luminance dynamic range of the SDR video is 0 to 100%, the luminance dynamic range of the HDR video is 100% to 1300% or 100% to 10000%, for example. The luminance range of the output of the imaging device 10 is 0 to 600%.

[Operation of Imaging System 1 of this Embodiment]
In the imaging system 1 of the present embodiment, the HDR process unit 22 and the SDR process unit 23 provided in the camera control unit 20 can simultaneously generate the HDR video and the SDR video from the pixel signal transmitted from the imaging device 10. it can. That is, the pixel signal transmitted from the imaging device 10 to the camera control unit 20 through the camera cable 30 is supplied to the HDR process unit 22 and the SDR process unit 23 provided in the camera control unit 20, respectively. As a result, the HDR process unit 22 generates an HDR video and the SDR process unit 23 generates an SDR video.

  The SDR gain adjusting unit 231 of the camera control unit 20 has a function of changing the ratio of the master gain on the SDR process side to the master gain on the HDR process side based on the relative range given from the CPU 24. The relative range is information for setting a correlation between the dynamic range of the SDR video and the dynamic range of the HDR video. For example, the relative range is information that defines how many times the dynamic range of the HDR video is set with respect to the dynamic range of the SDR video. By this relative range, the ratio of the master gain on the SDR process side to the master gain on the HDR process side can be set to an arbitrary ratio such as 1, 1/2, for example.

  In this way, if the ratio between the master gain on the HDR process side and the master gain on the SDR process side is set, the dynamic range of the HDR video having a correlation with the dynamic range of the SDR video can be obtained.

  More specifically, the upper limit criterion of the dynamic range of the SDR video is given by reference white (Diffuse-White) selected by the producer. In the imaging system 1 of this embodiment, by selecting the reference white (Diffuse-White) of the SDR video, based on the correlation based on the relative range, the upper limit reference of the dynamic range of the HDR video (the HDR video The reference white (Diffuse-White) is also determined.

  The relative range should be appropriately selected according to the shooting environment such as daytime, nighttime, indoors, outdoors, in the studio, in fine weather, and in rainy weather. Therefore, a plurality of types of relative ranges associated with various shooting environments are prepared. As a method of preparing a plurality of types of relative ranges associated with the shooting environment, a method of comparing the apparent brightness of SDR video and HDR video simultaneously output from the camera control unit 20 with human eyes is conceivable. . Each time the value of the relative range is changed, the SDR video and the HDR video are compared, and the relative range in which the apparent brightness of the SDR video and the HDR video is close may be determined as the optimum reactive range for the shooting environment.

  If the optimal range is set for the shooting environment, when the brightness of the SDR video is changed by iris adjustment, the brightness change intended by the producer of the HDR video is also given to the appearance of the HDR video. Can do.

  Next, a setting example of the relative range will be described.

[1: 1 setting]
FIG. 3 is a diagram showing the relationship between the dynamic range of the SDR video and the HDR video at the time of 1: 1 setting.
In addition, in the figures used as examples of setting the relative range, including the same figure, the OETF gamma on the HDR video side and the display gamma on the SDR video side so that the relationship between the dynamic ranges of the SDR video and the HDR video can be easily understood. The relationship before applying is shown.

  Assume that a 4K resolution pixel signal (Linear Plain Video) is transmitted from the imaging apparatus 10 to the camera control unit 20. The dynamic range of the image sensor is, for example, 1300%, where the dynamic range of SDR video is 100%.

  At the 1: 1 setting, the dynamic range of the HDR video and the dynamic range of the SDR video are the same. That is, the dynamic range of HDR video is adjusted to the dynamic range of SDR video.

  In the SDR video, a high luminance component exceeding the dynamic range of the SDR video in the pixel signal is pushed into the high frequency% portion in the dynamic range of the SDR video by the knee function and the clip function.

[HDR-contrast double setting]
FIG. 4 is a diagram showing the relationship between the dynamic ranges of the SDR video and the HDR video when the HDR-contrast is set twice.
In this setting, the master gain of the SDR gain adjustment unit 231 is set to 1/2 with respect to the master gain of the HDR gain adjustment unit 221 by the relative range. As a result, the dynamic range of the HDR video is twice that of the SDR video, and the contrast of the HDR video with respect to the SDR video is doubled.

[SDR-D-Range-Gamma 350% setting]
In this imaging system 1, the SDR processing unit 23 can also generate SDR video from a signal obtained by applying gamma to the pixel signal. In this case, since the dynamic range of the pixel signal is partially compressed to the SDR dynamic range, the reference white (Diffuse-White) that is the upper limit of the dynamic range of the HDR video can be set higher.

  As an example, FIG. 5 is a diagram illustrating the relationship between the dynamic ranges of SDR video and HDR video when SDR-D-Range-Gamma 350% is set.

  By applying gamma to the pixel signal input to the SDR process unit 23, up to 350% of the dynamic range of the pixel signal is compressed to the SDR dynamic range. As a result, the HDR dynamic range is SDR. Is set to 350% of the dynamic range.

[HDR contrast doubled & SDR-D-Range-Gamma 220% setting]
FIG. 6 is a diagram showing the relationship between the dynamic ranges of the SDR video and the HDR video when HDR contrast is doubled and SDR-D-Range-Gamma is set to 220%.
As described above, the HDR dynamic range is set to 440% of the SDR dynamic range by combining the HDR contrast twice and SDR-D-Range-Gamma 220%.

[How to set the relative range]
The camera control unit 20 is connected to a producer's operating device 40 through a communication path 50 such as a LAN (Local Area Network). The operation device 40 includes a display 41, an operation input unit 42, and a control unit 43. The control unit 43 can cause the display 41 to display a GUI for selecting a relative range. The creator can select an arbitrary relative range by the operation input of the operation input unit 42 using the GUI displayed on the display 41. The control unit 43 of the operation device 40 receives information on the relative range selected by the producer using the operation input unit 42, and transmits the setting information on the relative range to the CPU 24 of the camera control unit 20 through the communication path 50. . The CPU 24 of the camera control unit 20 sets the relative range in the SDR gain adjustment unit 231 of the SDR process unit 23 based on the setting information of the relative range.

Further, the SDR video generated by the camera control unit 20 is displayed on the display 41 of the controller device 40. The producer can check the brightness and color expression of the SDR video through the display 41. At this time, the control unit 43 of the controller device 40 calculates the correlation between the dynamic range of the SDR video (or its upper limit reference) and the dynamic range of the HDR video (or its upper limit reference) based on the set relative range. For example, it is displayed on the display 41 in the form of “SDR: HDR = 100%: 200%”. As a result, the creator can confirm the relationship between the SDR video brightness and color expression and the relative range.
Alternatively, the correlation between the dynamic range of SDR video (or its upper limit criterion) and the dynamic range of HDR video (or its upper limit criterion) may be displayed in a graph format as shown in FIGS.

[Iris adjustment]
In the imaging system 1, an operation input for iris adjustment can be performed using a GUI displayed on the display 41. The control unit 43 of the operating device 40 transmits control information for iris adjustment through the communication path 50 to the CPU 24 of the camera control unit 20 based on the operation input for iris adjustment received by the operation input unit 42. The CPU 24 of the camera control unit 20 can communicate with the CPU 15 of the imaging device 10 through the camera cable 30. When the CPU 24 of the camera control unit 20 receives control information for iris adjustment from the operation device 40, the CPU 24 notifies the CPU 15 of the imaging device 10 of this control information through the camera cable 30. The CPU 15 of the imaging apparatus 10 controls the iris of the optical system 11 according to this control information.

As described above, in the imaging system 1 of the present embodiment, HDR video and SDR video are simultaneously generated from the pixel signal obtained by the imaging device 10 by the HDR process unit 22 and the SDR process unit 23 in the camera control unit 20. be able to.
In addition, in the imaging system 1 of the present embodiment, when the apparent brightness of the SDR video is changed by iris adjustment, an equivalent change is also given to the apparent brightness of the HDR video created simultaneously with the SDR video. be able to. Thereby, for example, even when an HDR video is created in real time, an HDR video with brightness suitable for viewing can be created.

<Modification 1>
FIG. 7 is a block diagram illustrating Modification 1 of the imaging system according to the present technology.
The imaging system 1A is configured to display the SDR video generated by the camera control unit 20 on the viewfinder 16 of the imaging apparatus 10.

  The SDR video generated by the SDR process unit 23 of the camera control unit 20 is transmitted to the imaging apparatus 10 through the camera cable 30 by the transmission unit 21. The transmission unit 14 of the imaging apparatus 10 outputs the SDR video transmitted from the camera control unit 20 to the viewfinder 16. By performing iris adjustment with an appropriate brightness on the SDR video, an image with an appropriate brightness can be captured on the viewfinder 16, and shooting can be performed while viewing the same image as before.

<Modification 2>
FIG. 8 is a block diagram illustrating Modification Example 2 of the imaging system according to the present technology.
In this imaging system 1B, in addition to the viewfinder 16 described above, an SDR process unit 18 having the same configuration as the SDR process unit 23 of the camera control unit 20 is provided in the imaging apparatus 10.

  In the imaging system 1B, an SDR video is generated by the SDR processing unit 18 in the imaging apparatus 10, and the SDR video is output to the viewfinder 16 and displayed. For this reason, the photographer can view the SDR video without receiving the transmission of the SDR video from the camera control unit 20.

  In the imaging system 1B, the CPU 24 of the camera control unit 20 and the CPU 15 of the imaging apparatus 10 communicate with each other through the camera cable 30 to include a relative gain set in each unit in the SDR process unit 23 of the camera control unit 20. The value of each parameter is also set in each part in the SDR process part 18 of the imaging device 10. Therefore, it is possible to display the SDR video that does not change the appearance as in Modification 1 on the viewfinder 16.

<Modification 3>
FIG. 9 is a block diagram illustrating Modification Example 3 of the imaging system according to the present technology.
This imaging system 1 </ b> C is provided with an HDR process unit 19 in the imaging apparatus 10. The HDR video generated by the HDR processing unit 19 in the imaging apparatus 10 is transmitted to the camera control unit 20 and is output as it is as the main line HDR video. Further, the HDR video transmitted to the camera control unit 20 is also supplied to the HDR inverse conversion unit 25 provided in the camera control unit 20. The HDR reverse conversion unit 25 performs reverse conversion of the HDR video into the original pixel signal and outputs it to the SDR processing unit 23 in the camera control unit 20. The SDR video generated by the SDR process unit 23 is supplied to the main line system, returned to the imaging device 10 through the transmission unit 21, and output to the viewfinder 16 of the imaging device 10 for display.

<Modification 4>
FIG. 10 is a block diagram illustrating Modification 4 of the imaging system according to the present technology.
This imaging system 1D is configured by adding an SDR process unit 18 to the imaging device 10 of the imaging system 1C of the above-described modification 3. That is, it is generated by the SDR processing unit 18 in the imaging apparatus 10 and displayed on the viewfinder 16. For this reason, a system in which the imaging apparatus 10 receives the SDR video from the camera control unit 20 is unnecessary.

<Modification 5>
The case where the present technology is adopted in the imaging system including the imaging device 10 and the camera control unit 20 has been described above. However, the present technology is based on the HDR process in the camera control unit 20 in the imaging device 10 illustrated in FIG. By incorporating the configurations of the unit 22 and the SDR process unit 23, it is also possible to configure the imaging device as a single unit. In this case, the imaging element 11 in the imaging device 10 corresponds to an “imaging unit” in the configuration of the imaging device of the present technology.

<Modification 6>
Furthermore, the camera control unit 20 can also be configured using a computer. That is, by installing a program that causes a computer to operate as the camera control unit 20 and connecting it to the imaging apparatus 10, an imaging system equivalent to the first embodiment can be realized.

<Modification 7>
In the above-described modification, the CPU 24 of the camera control unit 20 or the CPU 15 of the imaging device 10 calculates the correlation between the dynamic range of the SDR video and the dynamic range of the HDR video based on the relative range, for example, “SDR: HDR = 100%: 200% "may be displayed on the viewfinder 16.

In addition, this technique can also take the following structures.
(1) A first video signal having a first dynamic range is generated from the pixel signal generated by an imaging unit that captures a subject and obtains a pixel signal, and a first video signal having a correlation with the first dynamic range is generated. An imaging system comprising a processing circuit for generating a second video signal having a dynamic range of two.

(2) The imaging system according to (1) above,
The processing circuit includes:
An imaging system configured to set the second dynamic range based on the first dynamic range based on information for setting a correlation between the first dynamic range and the second dynamic range .

(3) The imaging system according to (1) or (2) above,
The processing circuit correlates a ratio between a first gain for the pixel signal for generating the first video signal and a second gain for the pixel signal for generating the second video signal. An imaging system configured to be set based on the information to set.

(4) The imaging system according to any one of (1) to (3),
The processing circuit includes:
An imaging system configured to generate the first video signal having the first dynamic range from a signal obtained by performing gamma signal processing on the pixel signal.

(5) The imaging system according to any one of (1) to (4),
The first video signal is SDR (Standard Dynamic Range) video;
The imaging system, wherein the second video signal is HDR (High Dynamic Range) video.

(6) The imaging system according to any one of (1) to (5),
An imaging system, further comprising a display for displaying the first video signal generated by the processing circuit.

(7) The imaging system according to (6) above,
The display is a viewfinder.

(8) The imaging system according to (6) or (7) above,
The said processing circuit performs the process which displays the correlation of the said 1st dynamic range and the said 2nd dynamic range on the said display based on the information which sets the said correlation.

(9) The imaging system according to any one of (1) to (8),
The imaging system configured to perform an iris adjustment process based on an iris adjustment input when the first video signal is displayed on a display.

(10) The imaging unit images a subject to generate a pixel signal,
A processing circuit generates a first video signal having a first dynamic range from the pixel signal generated by the imaging unit, and a second dynamic range having a correlation with the first dynamic range. An imaging method that generates video signals.

(11) The imaging method according to (10) above,
The processing circuit is
An imaging method for setting the second dynamic range on the basis of the first dynamic range based on information for setting a correlation between the first dynamic range and the second dynamic range.

(12) The imaging method according to (10) or (11) above,
The processing circuit correlates a ratio between a first gain for the pixel signal for generating the first video signal and a second gain for the pixel signal for generating the second video signal. An imaging method that is set based on the information that is set.

(13) The imaging method according to any one of (10) to (12),
The processing circuit is
An imaging method for generating the first video signal having the first dynamic range from a signal obtained by performing gamma signal processing on the pixel signal.

(14) The imaging method according to any one of (10) to (13),
The first video signal is SDR (Standard Dynamic Range) video;
The imaging method, wherein the second video signal is HDR (High Dynamic Range) video.

(15) The imaging method according to any one of (10) to (14),
An imaging method for displaying the first video signal generated by the processing circuit on a display.

(16) The imaging method according to (15) above,
The display is a viewfinder.

(17) The imaging method according to (15) or (16) above,
The imaging method, wherein the processing circuit performs a process of displaying a correlation between the first dynamic range and the second dynamic range on the display based on information for setting the correlation.

(18) The imaging method according to any one of (10) to (17),
An imaging method in which the processing circuit performs an iris adjustment process based on an iris adjustment input when the first video signal is displayed on the display.

(19) A first video signal having a first dynamic range is generated from the pixel signal generated by an imaging unit that captures a subject and obtains a pixel signal, and a first video signal having a correlation with the first dynamic range is generated. A program for operating a computer as a processing circuit for generating a second video signal having a dynamic range of 2.

(20) The program according to (19) above,
The processing circuit is
Based on the information for setting the correlation between the first dynamic range and the second dynamic range, the computer is operated to set the second dynamic range based on the first dynamic range. program.

(21) The program according to (19) or (20) above,
The processing circuit is
Information for setting a correlation between a ratio between a first gain for the pixel signal for generating the first video signal and a second gain for the pixel signal for generating the second video signal. A program for operating the computer so as to be set originally.

(22) The program according to any one of (19) to (21),
The processing circuit is
A program for operating the computer to generate the first video signal having the first dynamic range from a signal obtained by performing gamma signal processing on the pixel signal.

(23) The program according to any one of (19) to (22),
The first video signal is SDR (Standard Dynamic Range) video;
The program in which the second video signal is HDR (High Dynamic Range) video.

(24) The program according to any one of (19) to (23),
A program for operating a computer so that the first video signal generated by the processing circuit is displayed on a display.

(25) The program according to (24) above,
The display is a viewfinder program.

(26) The program according to (24) or (25) above,
The processing circuit is
Based on the information for setting the correlation, so as to perform a process of displaying the correlation between the first dynamic range and the second dynamic range on the display,
A program for operating the computer.

(27) The program according to any one of (19) to (26) above,
A program for operating the computer so that the processing circuit performs an iris adjustment process based on an iris adjustment input when the first video signal is displayed on the display.

(28) A first video signal having a first dynamic range is generated from the pixel signal generated by the imaging unit that captures a subject and obtains a pixel signal, and a first video signal having a correlation with the first dynamic range is generated. And a processing circuit for generating a second video signal having a dynamic range of two.

(29) The imaging apparatus according to (28), wherein
The processing circuit includes:
An imaging apparatus configured to set the second dynamic range based on the first dynamic range based on information for setting a correlation between the first dynamic range and the second dynamic range .

(30) The imaging device according to (28) or (29) above,
The processing circuit correlates a ratio between a first gain for the pixel signal for generating the first video signal and a second gain for the pixel signal for generating the second video signal. An imaging device configured to be set based on information for setting.

(31) The imaging device according to any one of (28) to (30),
The processing circuit includes:
An imaging apparatus configured to generate the first video signal having the first dynamic range from a signal obtained by performing gamma signal processing on the pixel signal.

(32) The imaging device according to any one of (28) to (31),
The first video signal is SDR (Standard Dynamic Range) video;
The imaging apparatus, wherein the second video signal is HDR (High Dynamic Range) video.

(33) The imaging device according to any one of (28) to (32),
The image processing apparatus, wherein the processing circuit is configured to display the first video signal on a display.

(34) The imaging apparatus according to (33) above,
The display is a viewfinder.

(35) The imaging device according to (33) or (34) above,
The image processing apparatus configured to perform processing for displaying a correlation between the first dynamic range and the second dynamic range on the display based on information for setting the correlation.

(36) The imaging device according to any one of (26) to (35),
An imaging apparatus that performs an iris adjustment process based on an iris adjustment input when the first video signal is displayed on the display.

DESCRIPTION OF SYMBOLS 1 ... Imaging system 10 ... Imaging device 12 ... Imaging part 15 ... CPU
16 ... Viewfinder 20 ... Camera control unit 22 ... HDR process unit 23 ... SDR process unit 24 ... CPU
DESCRIPTION OF SYMBOLS 40 ... Operation apparatus 41 ... Display 42 ... Operation input part 221 ... HDR gain adjustment part 231 ... SDR gain adjustment part

Claims (12)

A first processing unit that generates a first video signal having a first dynamic range from the pixel signal generated by an imaging unit that captures a subject and obtains a pixel signal;
And a second processing unit that generates a second video signal having a second dynamic range different from the first dynamic range from the pixel signal. The imaging system according to claim 1,
The imaging system in which the first processing unit outputs the first video signal and the second processing unit outputs the second video signal. The imaging system according to claim 1,
The imaging system, wherein the first video signal has a first resolution, and the second video signal has a second resolution higher than the first resolution. The imaging system according to claim 3,
The imaging system in which the first resolution is HD resolution and the second resolution is 4K resolution. The imaging system according to claim 1,
The first processing unit performs an adjustment process based on an adjustment parameter for the first video signal,
The second processing unit performs processing on the second video signal based on information indicating a correlation between the first dynamic range and the second dynamic range and the adjustment parameter. The imaging system according to claim 5,
The first processing unit performs an adjustment process based on the adjustment parameter for the first video signal in accordance with a user operation input. The imaging system according to any one of claims 1 to 6,
The first video signal is SDR (Standard Dynamic Range) video;
The imaging system, wherein the second video signal is HDR (High Dynamic Range) video. The imaging system according to any one of claims 1 to 7,
An imaging system further comprising a display for displaying the first video signal generated by the first processing unit. The imaging system according to claim 8,
The display is a viewfinder. The imaging system according to claim 8,
An imaging system further comprising: a control unit that displays a correlation between the first dynamic range and the second dynamic range on the display. The imaging system according to claim 10,
The said control part produces | generates the control information for the iris adjustment in the said imaging part input when the said 1st video signal is displayed on the said display. Imaging system. The imaging unit images a subject and generates a pixel signal,
Generating a first video signal of a first dynamic range from the pixel signal;
An imaging method for generating a second video signal having a second dynamic range different from the first dynamic range from the pixel signal.

Images