JP2020120311A - Image processing system, image processing method and program - Google Patents

Abstract

To reduce the load on a user when performing operation for changing exposure.SOLUTION: In an image processing system having output means for outputting an image to a display device, first conversion means for converting a first image into a second image having a dynamic range narrower than that of the first image, second conversion means for converting the first image into a third image, where the luminance display of the first image, when displayed in a display device not corresponding to the dynamic range of the first image, becomes the luminance display approximate to that when displayed in a display device corresponding to the dynamic range of the first image, and switching means for outputting to the output means while switching to any one of the second image and the third image, the switching means switches from the second image to the third image, according to lightness adjustment operation of the image by the user while outputting the second image.SELECTED DRAWING: Figure 1

Description

The present invention relates to an image processing device, an image processing method, a program, and a recording medium.

A photographing device such as a digital camera or a digital video camera photoelectrically converts a subject image in pixel units by an image sensor such as a CMOS sensor or a CCD sensor to generate an image signal according to the intensity of light, and generates the generated image signal. Image processing is performed on the converted image data. In recent years, the performance of image pickup devices has improved, and image data with a high dynamic range can be generated. Hereinafter, the high dynamic range will be referred to as “HDR”, the imaging device capable of capturing the HDR video will be referred to as “HDR compatible camera”, and the display device capable of displaying the HDR video will be referred to as “HDR compatible monitor”. On the other hand, a display device compatible only with the conventional display of images in a standard brightness range (standard dynamic range) is referred to as “non-HDR compatible monitor”, and a standard dynamic range is referred to as “SDR”.

Although SDR video contents are the mainstream in the current broadcasting and distribution environment, demand for HDR video contents is increasing due to the progress of HDR support in home televisions. Therefore, there has been proposed a camera system as disclosed in Patent Document 1, which is capable of simultaneously shooting SDR video content and HDR video content.
In such a system, at the same time as outputting the HDR video, it is possible to simultaneously output the SDR video in which a constant brightness difference called a gain difference is added to the HDR video. When a user such as a video engineer adjusts an image, first, the exposure is adjusted while confirming the HDR image on the HDR compatible monitor. Next, the gain difference described above is adjusted while checking the SDR image. At this time, the adjustment of the gain difference does not change the exposure on the HDR side. After that, the user makes adjustments other than exposure with the SDR video. At this time, the HDR image is also interlocked and the image quality is adjusted while the set gain difference is maintained. Therefore, the user can make adjustments by utilizing the knowledge and experience in the SDR video, and can suppress the investment of the HDR compatible device.

JP, 2017-60113, A

However, in the system as disclosed in Patent Document 1, when the user tries to change the exposure, the SDR image is displayed, so that the HDR image cannot be confirmed and there is a problem that an appropriate exposure cannot be set as HDR. .. For example, when changing the exposure, the user has to move to the side of the HDR compatible monitor on which the HDR video is displayed, and if the HDR compatible monitor is on another shooting track, the user is burdened. Will end up.
The present invention has been made in view of the above problems, and an object thereof is to reduce the burden on the user that occurs when performing an operation of changing the exposure.

The present invention includes an output unit that outputs an image to a display device, and a first conversion unit that converts the first image into a second image having a dynamic range narrower than the dynamic range of the first image. When the first image is displayed on a display device whose brightness display of the first image does not correspond to the dynamic range of the first image, the display device corresponds to the dynamic range of the first image. Second conversion means for converting into a third image having a brightness display similar to that when displayed, and switching for switching to any one of the second image and the third image and outputting to the output means An image processing apparatus having means, wherein the switching means changes from the second image to the third image in response to a user's operation of adjusting the brightness of the image during the output of the second image. It is characterized by switching to.

It is possible to reduce the burden on the user when performing the operation of changing the exposure.

It is a figure which shows an example of a structure of an image processing apparatus. It is a flow chart which shows an example of processing of an image processing device.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. In the present embodiment, a camera (imaging device) will be described as an example of the image processing device.
FIG. 1 is a diagram illustrating an example of the configuration of the camera 100.
The camera 100 includes a CPU 101, a ROM 102, a RAM 103, an operation unit 104, a remote controller 105, an imaging unit 106, an image processing circuit 107, an SDR image conversion circuit 108, an HDR assist image conversion circuit 109, and a waveform monitor image conversion circuit 110. The camera 100 also includes an image output circuit 111, an SDI terminal 112, an HDMI (registered trademark) terminal 113, an HDMI data communication circuit 114, and the like.

The CPU 101 reads a program and fixed value data (a value for a predetermined period, etc.) stored in the ROM 102, which is a non-volatile memory, and controls each unit of the camera according to the program. The CPU 101 corresponds to an example of a switching unit and a determination unit. The RAM 103 is a volatile memory and stores variable value data used by the CPU 101, image data output from each circuit, and the like.
The operation unit 104 receives a user operation. The operation unit 104 includes operation members such as a power switch, an image adjustment dial or switch, and a menu operation switch. In addition, the operation unit 104 may include a liquid crystal panel or the like that displays set values, menus, and the like. Further, the operation unit 104 may include a touch panel, a pointing device, or the like realized by a GUI. The CPU 101 periodically monitors the state of the operation unit 104, and accepts the operation at the operation unit 104, thereby executing processing according to the operation.

The remote controller 105 receives a user operation. The remote controller 105 is a separate body from the operation unit 104 described above. The remote controller 105 is communicably connected to the CPU 101 by wire or wirelessly. Similar to the operation unit 104, the remote controller 105 includes operation members such as dials and switches for image adjustment and switches for menu operation. Further, the remote controller 105 may be an information processing device such as a PC, a tablet terminal, or a smartphone configured separately from the camera 100, and may be one in which an application that can remotely operate the camera 100 is installed.

The image pickup unit 106 includes a lens, an image sensor, and an AD converter. The subject image formed on the image sensor through the lens is taken out as an analog image signal at a predetermined frame rate and converted into digital image data by an AD converter. The image sensor is provided with color filters corresponding to R (red), G (green), and B (blue), and acquires image signals of each color. Note that the image capturing unit 106 may be of a type that receives the separated R, G, and B with three image sensors to acquire image signals of each color.
The image capturing unit 106 of the present embodiment is compatible with HDR and can output an image signal having a wider brightness range than conventional. Further, the AD converter performs quantization with a bit depth of 14 bits so as not to impair the gradation with respect to the width of the luminance range. Furthermore, the image processing circuit 107 can also process image data with 14 bits.

The image processing circuit 107 performs gain adjustment as HDR on the R, G, and B image data output from the imaging unit 106. The image processing circuit 107 also performs other image processing as necessary. After that, the image processing circuit 107 performs HDR gamma correction on the gain-adjusted image data and converts the image data into Y (luminance) and CbCr (color difference) image data. The YCbCr data is stored in the RAM 103 as an HDR image. Here, the gamma correction is a process of correcting the output signal on the camera side so that the display (luminance) with respect to the input signal on the monitor side has a linear relationship. Further, the image processing circuit 107 may perform a process of rounding the bit depth according to the output destination. For example, the image processing circuit 107 performs processing for rounding the bit depth to 12 bits to 10 bits in order to output an image from the SDI terminal 112.

The SDR image conversion circuit 108 is a circuit that converts an HDR image and generates an SDR image. That is, the SDR image conversion circuit 108 converts the first image into a second image having a dynamic range narrower than the dynamic range of the first image. Various methods can be considered for this conversion. For example, the conversion characteristics are set so that more gradations are assigned to the low luminance area than the high luminance area, or conversely, many gradations are assigned to the high luminance area rather than the low luminance area. It is conceivable to set the conversion characteristics so that Therefore, the gradation characteristic of the signal value assigned to the SDR image with respect to the signal value of the HDR image is often a non-linear characteristic. The first image is an example of an HDR image and the second image is an example of an SDR image. The SDR image conversion circuit 108 is an example of first conversion means.
As a result of the conversion from the HDR image to the SDR image as described above, the SDR image may be output as an overexposed or underexposed image even if the exposure is properly adjusted in the HDR image. is there. However, if the SDR image is adjusted to have the proper exposure, the HDR image is not properly exposed this time. Therefore, the SDR image conversion circuit 108 performs gain control on the HDR image output from the image processing circuit 107 so that the subject of interest is appropriately expressed in the SDR video signal range. That is, by applying a positive or negative gain to the HDR image, it is possible to obtain the same effect as when the exposure is adjusted without affecting the HDR image. This gain can be manually adjusted by a user such as a cameraman or a video engineer. Hereinafter, this gain is referred to as an SDR gain, and is distinguished from the HDR image gain in the image processing circuit 107. Further, the SDR image conversion circuit 108 performs SDR gamma correction on the image after the gain adjustment. The converted image is stored in the RAM 103 as an SDR image.

The HDR assist image conversion circuit 109 is a circuit that performs gamma correction from an HDR image so as to perform approximate brightness display even on a non-HDR compatible monitor, and converts the HDR image into an HDR assist image. That is, the HDR assist image conversion circuit 109 corresponds to the dynamic range of the first image when the first image is displayed on the monitor whose luminance display of the first image does not correspond to the dynamic range of the first image. The third image is converted into a third image having a brightness display similar to that displayed on the monitor. For example, by setting the gradation characteristic of the signal value assigned to the SDR image to the signal value of the HDR image to be a linear characteristic, it is possible to represent an image approximate to the HDR image. The third image is an example of the HDR assist image. The HDR assist image conversion circuit 109 is an example of second conversion means. The converted HDR assist image is stored in the RAM 103.

The waveform monitor image conversion circuit 110 generates an image for waveform monitor display from an HDR image or an SDR image. The waveform monitor image conversion circuit 110 is an example of a generation unit. The generated image is stored in the RAM 103 as a waveform monitor image.

The image output circuit 111 reads the uncompressed YCbCr image data stored in the RAM 103, converts it into data of a high-speed serial interface standard, and outputs a video signal so that it can be transmitted by one coaxial cable. The image output circuit 111 is an example of an output unit. The image output circuit 111 determines the image to be read from the RAM 103 by the CPU 101 selecting an image to be read from the HDR image, the SDR image, and the HDR assist image, or by the user directly specifying the image from a menu or the like. The image output circuit 111 outputs an HDR video signal when reading an HDR image. Further, the image output circuit 111 outputs the SDR video signal when reading the SDR image or the HDR assist image. Further, the image output circuit 111 reads the waveform monitor image, superimposes the waveform monitor image on a predetermined area of the HDR image, the SDR image, or the HDR assist image, and outputs a video signal.

The image output circuit 111 can separately output the images read from the RAM 103 to the SDI terminal 112 and the HDMI terminal 113. Although the camera 100 shown in FIG. 1 has a configuration having two SDI terminals 112, it may have a configuration having a plurality of terminals including the HDMI terminal 113. The image output circuit 111 can also output an image separately for each terminal. For example, the image output circuit 111 can output an SDR image to one SDI terminal 112 and an HDR image to another one SDI terminal 112.

The SDI terminal 112 converts the image data into a predetermined format that can be transmitted by the SDI cable, adjusts the signal level, and then outputs the image.
The HDMI terminal 113 has a signal line whose signal changes when a monitor is connected. The CPU 101 determines whether or not the monitor is connected by reading the state of the signal line. When the monitor is connected, the HDMI terminal 113 converts the image data into a predetermined format that can be transmitted by the HDMI cable, adjusts the signal level, and then outputs the adjusted signal.

The HDMI data communication circuit 114 can acquire an EDID (Extended Display Identification Data) from the connected monitor according to an instruction from the CPU 101. The CPU 101 extracts a list of signal formats (resolution, frame rate, HDR/SDR) that can be displayed by the monitor from the EDID and stores it in the RAM 103. A list of signal formats that can be displayed is called HDMI capability information.
The CPU 101 can determine whether the connected monitor supports HDR based on the HDMI capability information. For example, when the CPU 101 determines that an HDR compatible monitor is connected to the HDMI terminal 113, it is possible to perform control to select and output an HDR image.

Further, the camera 100 may have a circuit that compresses/encodes the HDR image or the SDR image stored in the RAM 103 in a predetermined format and records the compressed image on a recording medium such as a memory card. In this case, the camera 100 can output the SDR image from the SDI terminal 112 while recording the HDR image on the memory card and perform live distribution in the SDR.

Here, the user makes a setting in the menu to output the HDR image from at least one of the SDI terminal 112 or the HDMI terminal 113, and adjusts the optimum exposure for HDR while checking the HDR image on the HDR compatible monitor. After that, the output is switched to the SDR image, or the menu is set to output the SDR image from another terminal, and the SDR gain adjustment described above is performed while checking the SDR image. Note that the CPU 101 superimposes and displays the waveform monitor image of the HDR image and the waveform monitor image of the SDR image at the time of adjusting the exposure of the HDR image and at the time of adjusting the SDR gain, so that the user objectively optimizes. You can adjust the exposure.

Next, image switching processing by the CPU 101 of the camera 100 will be described with reference to the flowchart of FIG. The flowchart of FIG. 2 is realized by the CPU 101 expanding a program stored in the ROM 102 into the RAM 103 and executing the program.
In step S201, the CPU 101 instructs the image output circuit 111 to read the SDR image and output the SDR image to the monitors connected to the SDI terminal 112 and the HDMI terminal 113, respectively. Therefore, the SDR image is displayed on the monitor connected to the SDI terminal 112 and the HDMI terminal 113.
In S202, the CPU 101 instructs the waveform monitor image conversion circuit 110 to generate a waveform monitor image from the SDR image. Therefore, the waveform monitor image generated from the SDR image is superimposed and displayed in a predetermined area of the SDR image.

In S203, the CPU 101 sets a no-operation period counter for counting the period during which no operation is performed to 0.
In S204, the CPU 101 determines whether or not an exposure adjustment operation has been performed on the operation unit 104. The exposure adjustment operation corresponds to the image brightness adjustment operation. If the exposure adjustment operation has been performed on the operation unit 104, the process proceeds to S209, and if not, the process proceeds to S205.

In step S205, the CPU 101 determines whether or not an exposure adjustment operation has been performed by the remote controller 105. If the exposure adjustment operation has been performed by the remote controller 105, the process proceeds to S210, and if not, the process proceeds to S206.
In step S206, the CPU 101 determines whether an image adjustment operation other than the exposure adjustment operation has been performed by the operation unit 104 or the remote controller 105. Here, the image adjustment operations other than the exposure adjustment operation include the SDR gain adjustment described above. When an adjustment operation other than exposure is performed, the process returns to S201. When the SDR image is output during the adjustment operation other than the exposure, the CPU 101 continuously outputs the SDR image in S201. Further, when the HDR image or the HDR assist image is output during the adjustment operation other than the exposure, the CPU 101 switches to the SDR image in S201. Therefore, it is possible to prevent an erroneous operation in which the user originally makes an operation while looking at the SDR image and makes an adjustment while looking at the HDR image or the HDR assist image. If no adjustment operation other than exposure is performed, the process proceeds to S207.

In S207, the CPU 101 determines whether the no-operation period counter is 0. If the no-operation period counter is 0, the process returns to S201, and if not, the process proceeds to S208.
In S208, the CPU 101 decrements the non-operation period counter. That is, after a predetermined period elapses in the non-operation state after switching from the SDR image to the HDR image or the HDR assist image in S211, S213, and S214 described below, the process proceeds from S207 to S201, and the CPU 101 switches to the SDR image.

In step S209, the CPU 101 determines whether image switching is permitted when an exposure adjustment operation is performed on the operation unit 104. If the switching is permitted, the process proceeds to S211, and if not, the process proceeds to S207.
Similarly, in S210, the CPU 101 determines whether or not image switching is permitted when the exposure adjustment operation is performed by the remote controller 105. If the switching is permitted, the process proceeds to S211, and if not, the process proceeds to S207.

Here, whether or not to permit switching of images can be set in advance by the user from a menu or the like. The CPU 101 stores a switching permission flag in the RAM 103 according to the setting made by the user. Here, the switch permission flag is held separately for each of the operation unit 104 and the remote controller 105. Therefore, for example, it is possible to set such that the image switching is permitted when the exposure adjusting operation is performed on the operation unit 104 and the image switching is not permitted when the exposure adjusting operation is performed by the remote controller 105. Is.
Even when there are a plurality of remote controllers 105, the switching permission flag is held separately for each remote controller 105. Therefore, it is possible to set such that the image switching is permitted only when the exposure adjustment operation is performed by the specific remote controller 105.
In addition to the image switching permission, whether or not the exposure adjustment operation itself is permitted may be set for each operation unit 104 or remote controller 105.

In S211, the CPU 101 instructs the image output circuit 111 to read the HDR assist image and output it to the monitor connected to the SDI terminal 112. Therefore, on the monitor connected to the SDI terminal 112, the SDR image is switched to the HDR assist image and displayed.
In S212, the CPU 101 determines whether or not an HDR compatible monitor is connected to the HDMI terminal 113. The CPU 101 can determine whether or not the HDR compatible monitor is connected based on the above-mentioned HDMI capability information. If the HDR compatible monitor is not connected, the process proceeds to S213, and if the HDR compatible monitor is connected, the process proceeds to S214.

In step S<b>213, the CPU 101 instructs the image output circuit 111 to read the HDR assist image and output it to the HDR non-compliant monitor connected to the HDMI terminal 113. Therefore, the SDR image is switched to the HDR assist image and displayed on the HDR non-compliant monitor connected to the HDMI terminal 113.
In step S<b>214, the CPU 101 instructs the image output circuit 111 to read the HDR image and output the HDR image to the HDR compatible monitor connected to the HDMI terminal 113. Therefore, on the HDR compatible monitor connected to the HDMI terminal 113, the SDR image is switched to the HDR image and displayed.

In S215, the CPU 101 determines whether the SDR gain has been adjusted. If the SDR gain has not been adjusted, the process proceeds to S216, and if it has been adjusted, S216 is skipped and the process proceeds to S217.
In step S216, the CPU 101 instructs the waveform monitor image conversion circuit 110 to generate the waveform monitor image from the HDR image. On the other hand, if the SDR gain has already been adjusted when switching to the HDR image or the HDR assist image, S216 is skipped, so that the waveform monitor image generated from the SDR image is continuously superimposed and displayed. .. By thus displaying the waveform monitor image generated from the SDR image, the user can simultaneously confirm the brightness level of the SDR image. Note that the CPU 101 may return the display to the waveform monitor image of the HDR image according to an instruction from the user.

In S217, the CPU 101 sets the no-operation period counter to a value for a predetermined period. The value of the predetermined period is decremented in S208 described above, and when it is determined to be 0 in S207, the HDR image or the HDR assist image is switched to the SDR image in S201.

Thus, according to the present embodiment, the CPU 101 of the camera 100 switches from the SDR image to the HDR image in response to the image brightness adjustment operation by the user during the output of the SDR image. Therefore, when the user adjusts the brightness of the image, the image is automatically switched to the HDR image, and thus the brightness of the image can be adjusted while watching the HDR image. It is possible to reduce the burden of.
Further, according to the present embodiment, the CPU 101 of the camera 100 does not switch to the HDR image and switches to the HDR image when the user performs an image adjustment operation other than the image brightness adjustment operation during the output of the SDR image. Output the image continuously. Therefore, it is possible to prevent an erroneous operation in which the user originally makes an adjustment operation while looking at the SDR image but makes an adjustment operation while looking at the HDR image.

(Other embodiments)
The present invention is also realized by executing the following processing. In other words, the program that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various recording media, and the computer (CPU, MPU, etc.) of the system or apparatus reads and executes the program code. is there. In this case, the program and the recording medium recording the program constitute the present invention.

Although the present invention has been described above with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments, and modifications and the like can be made within the scope of the present invention.
Further, the above-described processing described as being performed by the CPU 101 may be performed by one piece of hardware, or may be performed by a plurality of pieces of hardware (for example, a plurality of processors or circuits) sharing the processing.
Further, although cases have been described with the above embodiment as examples where the present invention is applied to the camera 100, the present invention is not limited to this case. The present invention can be applied to any device that can switch the first image and the second image having a dynamic range narrower than the dynamic range of the first image.

101: CPU 102: ROM 103: RAM 104: Operation unit 105: Remote controller 106: Imaging unit 107: Image processing circuit 108: SDR image conversion circuit 109: HDR assist image conversion circuit 110: Waveform monitor image conversion circuit 111: Image output Circuit 112: SDI terminal 113: HDMI terminal 114: HDMI data communication circuit

Claims (15)

Output means for outputting an image to a display device,
First conversion means for converting the first image into a second image having a dynamic range narrower than the dynamic range of the first image;
When the first image is displayed on a display device whose brightness display of the first image does not correspond to the dynamic range of the first image, the display device corresponds to the dynamic range of the first image. Second conversion means for converting into a third image having a brightness display similar to that in the case of display,
An image processing apparatus comprising: a switching unit that switches to any one of the second image and the third image and causes the output unit to output the image.
The switching means is
An image processing apparatus, which switches from the second image to the third image in response to a user's operation of adjusting the brightness of the image while outputting the second image. The switching means is
When the user performs an image adjustment operation other than the image brightness adjustment operation during the output of the second image, the second image is output to the output unit without switching to the third image. The image processing apparatus according to claim 1, wherein the image processing apparatus continuously outputs the image. Output means for outputting an image to a display device,
First conversion means for converting the first image into a second image having a dynamic range narrower than the dynamic range of the first image;
An image processing apparatus comprising: a switching unit that switches to any one of the first image and the second image and outputs the output unit to the output unit.
The switching means is
An image processing apparatus, which switches from the second image to the first image in response to a user's operation of adjusting the brightness of the image while outputting the second image. The switching means is
When the user performs an image adjustment operation other than the image brightness adjustment operation during the output of the second image, the second image is output to the output unit without switching to the first image. The image processing apparatus according to claim 3, wherein the image processing apparatus continuously outputs the image. When the first image is displayed on a display device whose brightness display of the first image does not correspond to the dynamic range of the first image, the display device corresponds to the dynamic range of the first image. It has a second conversion means for converting into a third image which has a brightness display similar to that when displayed,
The switching means is
Switching to any one of the first image, the second image, and the third image to cause the output means to output,
Based on the display device output by the output unit, in response to the operation of adjusting the brightness of the image by the user during the output of the second image, the first image or the third image is output from the second image. 5. The image processing apparatus according to claim 3, wherein the image processing apparatus is switched to any one of the above. The switching means is
When the display device that outputs the image by the output unit corresponds to the dynamic range of the first image, the display device outputs the image in response to the operation of adjusting the brightness of the image by the user during the output of the second image. Switching from the second image to the first image,
When the display device for outputting the image by the output unit does not support the dynamic range of the first image, the display device outputs the image according to the brightness adjustment operation of the image by the user during the output of the second image. The image processing apparatus according to claim 5, wherein the second image is switched to the third image. Based on information obtained from a display device that outputs the image, the output device has a determination unit that determines whether the display device corresponds to the dynamic range of the first image,
The switching means is
7. The image processing apparatus according to claim 5, wherein the second image is switched to either the first image or the third image based on the determination made by the determination means. The switching means is
Adjustment of images other than the image brightness adjustment operation after switching to the first image or the third image in response to the image brightness adjustment operation by the user during the output of the second image 8. When the operation is performed or when the operation is not performed after a predetermined period has passed, the second image is switched to the second image. Image processing device. It is possible for the user to adjust the brightness of the image for each of the multiple operation units.
The switching means is
9. The switching to the first image or the third image based on the switching permission information set for each of the operation units is set forth in any one of claims 1, 2, 5 to 8. Image processing device. The image processing apparatus according to claim 9, wherein the operation unit includes a remote controller connected by wire or wirelessly. A generating means for generating a waveform monitor image from the first image or the second image,
The output means is
Superimposing the waveform monitor image on a predetermined area of the first image, the second image, or the third image, and outputting the superimposed image.
The generating means is
11. The waveform monitor image is generated from the second image even when the switching unit switches to the first image or the third image, and the waveform monitor image is generated from the second image. The image processing apparatus according to item 1. An output step of outputting the image to the display device,
A first conversion step of converting the first image into a second image having a dynamic range narrower than the dynamic range of the first image;
When the first image is displayed on a display device whose brightness display of the first image does not correspond to the dynamic range of the first image, the display device corresponds to the dynamic range of the first image. A second conversion step for converting into a third image that has a brightness display similar to that when displayed;
An image processing method comprising a switching step of switching to any one of the second image and the third image and outputting in the output step.
In the switching step,
An image processing method, wherein the second image is switched to the third image in response to a user's operation of adjusting the brightness of the image while outputting the second image. An output step of outputting the image to the display device,
A first conversion step of converting the first image into a second image having a dynamic range narrower than the dynamic range of the first image;
An image processing method comprising a switching step of switching to any one of the first image and the second image and outputting in the output step,
In the switching step,
An image processing method, comprising switching from the second image to the first image in response to a user's operation of adjusting the brightness of the image while outputting the second image. A program for causing a computer to function as each unit of the image processing apparatus according to claim 1. A computer-readable recording medium recording a program for causing a computer to function as each unit of the image processing apparatus according to claim 1.

Images