JP4502666B2 - Videoscope of electronic endoscope device capable of brightness adjustment processing - Google Patents

Description

  The present invention relates to an electronic endoscope apparatus including a video scope having an image sensor, and more particularly, to a brightness adjustment process for automatically adjusting the brightness of a subject image displayed on a monitor.

In a conventional electronic endoscope apparatus, in order to maintain a displayed subject image with appropriate brightness, a dimming function that adjusts the amount of illumination light applied to the subject by adjusting a diaphragm or the like has a processor ( Alternatively, a brightness adjustment process for adjusting the charge accumulation time of the CCD by controlling the electronic shutter operation can be performed. When a videoscope (electronic endoscope) capable of electronic shutter operation is connected to a processor (or light source device) having an electronic shutter control unit, it is determined whether or not electronic shutter operation is possible, and electronic shutter operation is performed. This is executed by the entire electronic endoscope apparatus (see Patent Document 1).
JP-A-7-39514 (FIG. 2)

Regarding brightness adjustment, it is necessary to adjust the photometric method (average photometry, peak photometry, etc.) and set values (brightness level, etc.) according to the status of the endoscope operation . Even in the case of a video scope that can implement brightness adjustment processing by electronic shutter operation independently of the processor by providing an electronic shutter control unit, fine brightness adjustment processing must be performed according to the user's setting operation. Don't be.

  Further, when the video scope can be connected to a plurality of processors (light source devices), or when the processor (light source device) can be connected to a plurality of video scopes, the photometry method set in the processor (light source device) is connected. It may not be suitable for the brightness adjustment process of a video scope.

  Therefore, in the present invention, when using a video scope that can independently perform brightness adjustment processing by the electronic shutter function, it is possible to change the details of the brightness adjustment processing in detail, and further, according to the usage situation. Another object of the present invention is to provide a video scope of an electronic endoscope apparatus that can select brightness adjustment processing.

  The video scope of the present invention is a video scope having an image pickup device and connected to a light source device or a processor, and is a video scope capable of realizing brightness adjustment processing independently (by the video scope alone) by an electronic shutter function. The video scope of the present invention includes brightness adjustment processing means, memory, receiving means, and switching means.

  The brightness adjustment processing means performs brightness adjustment processing in which the electronic shutter operation for the image sensor is controlled so as to maintain a displayed subject image at an appropriate brightness according to a luminance signal based on an image signal read from the image sensor. Execute. The memory stores setting items determined in advance according to the characteristics of the video scope regarding the brightness adjustment processing. Examples of setting items include photometry methods such as peak photometry and average photometry, and a brightness level that serves as a reference (standard) in brightness adjustment processing. Alternatively, when the subject image to be displayed is divided and measured, and the brightness of the entire subject image is detected by weighting each region, there is a value of a weighting coefficient according to the characteristics of the video scope. The video scope is stored in advance in a memory according to the characteristics of the scope. On the other hand, in the processor, these setting items can be changed by the user.

  The receiving unit receives, as data, a setting item transmitted from either the light source device or the processor regarding the brightness adjustment processing. The switching unit executes the first brightness adjustment process based on the setting item stored in advance in the memory, and executes the second brightness adjustment process based on the setting item set in either the processor or the light source device. And switch. That is, the brightness adjustment processing based on the content set in the video scope itself and the brightness adjustment processing based on the content set and changed by the user on the processor side are selectively switched. The brightness adjustment processing means executes either one of the first brightness adjustment processing and the second brightness adjustment processing in accordance with switching of the switching means.

Since the brightness adjustment process can be selectively switched as a process based on the video scope or the processor, the intention of the endoscope operator is balanced with the processor to which the brightness adjustment process based on the video scope is connected. If they are different , or if the brightness adjustment processing based on the contents of the setting change on the processor side is not suitable for the connected video scope, the brightness adjustment processing suitable for the situation can be selected.

  Such switching is preferably performed on the processor side. Therefore, the receiving means receives the switching data of the first and second brightness adjustment processes sent from either the processor or the light source device, and the switching means switches based on the received switching data. Good. It is preferable to switch to the occasional support according to the operation (operation of the keyboard, switch, etc.) by the operator on the processor side. That is, the switching unit is provided in either the light source device or the processor, and switches according to an operation on the switching operation unit that is operated to switch between the first brightness adjustment process and the second brightness adjustment process. Is preferred.

  The program of the present invention is a program related to the brightness adjustment processing of a video scope that has an image sensor and is connected to either the light source device or the processor, and displays according to a luminance signal based on an image signal read from the image sensor Brightness adjustment processing means for performing brightness adjustment processing for controlling the electronic shutter operation on the image sensor so as to maintain a subject image to be captured with appropriate brightness, and brightness adjustment processing according to the characteristics of the video scope in advance Reading means for reading set items to be determined from memory, receiving means for receiving brightness setting processing, and receiving means for receiving setting items that can be set and changed by the user as data, from the light source device and the processor, and memory First brightness adjustment processing based on setting items stored in advance The switching means for switching between execution and execution of the second brightness adjustment processing based on the setting item set in either the processor or the light source device functions, and the first brightness adjustment is performed according to switching of the switching means. The brightness adjustment processing means is caused to function so as to execute either the processing or the second brightness adjustment processing.

  According to the present invention, when using a video scope that can independently implement brightness adjustment processing using the electronic shutter function, it is possible to change the details of the brightness adjustment processing in detail, and further to the usage situation. A combined brightness adjustment process can be selected.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram of an electronic endoscope apparatus according to the first embodiment.

  The electronic endoscope apparatus includes a video scope 50 having a CCD 54 and a processor 10 that processes an image signal read from the CCD 54, and a monitor 32 and a keyboard 34 that display a subject image are connected to the processor 10. The video scope 50 is detachably connected to the processor 10.

  When a lamp lighting switch (not shown) is operated and turned on, power is supplied from the lamp power source 11 including the lamp control unit 11A to the light source lamp 12. The light emitted from the light source lamp 12 enters the incident end 51 </ b> A of the light guide 51 provided in the video scope 50 through the condenser lens 14. The light guide 51 is an optical fiber bundle that transmits light emitted from the light source lamp 12 to the distal end side of the video scope 50. Light that has passed through the light guide 51 is emitted from the emission end 51B, and is a light distribution lens that is a diffusion lens. The observation site S is irradiated with light through 52.

  The light reflected at the observation site S passes through the objective lens 53, whereby a subject image of the observation site S is formed on the light receiving surface of the CCD 54. In this embodiment, a single plate simultaneous type is applied as a color imaging method, and yellow (Ye), cyan (Cy), magenta (Mg), and green (G) color elements are checked on the light receiving surface of the CCD. Complementary color filters (not shown) arranged in a line are arranged so as to correspond to the respective pixels on the light receiving surface. In the CCD 54, the image signal of the subject image corresponding to the color passing through the complementary color filter is generated by photoelectric conversion, and the image signal for one frame or one field is sequentially read according to the color difference line sequential method at every predetermined time interval. For example, the NTSC system is applied as a color television system, and image signals for one frame (one field every 1/60 second interval) are sequentially read out every 1/30 second interval, and the AGC ( The signal is sent to the signal processing circuit 55 via Auto Gain Control (not shown here).

The signal processing circuit 55 configured by an IC (integrated circuit) includes an initial process circuit for performing amplification processing, a signal separation processing circuit for separating luminance signals and color signals, and R, G, and B primary color signals. Various circuits such as an R, G, B matrix circuit to be generated, a white balance adjustment circuit, a gamma correction circuit, an image contour emphasis circuit for emphasizing an image contour, a color matrix circuit for generating a luminance signal and a color difference signal are provided. (Both not shown). The image signal input to the signal processing circuit 55 is subjected to various processes in these circuits, thereby generating a video signal and sending it to the processor 10. Further, a CCD drive circuit (not shown) that outputs a drive signal for driving the CCD 54 at a predetermined timing is provided.

  In the processor signal processing circuit 28, predetermined processing is performed on the video signal transmitted from the signal processing circuit 55. The processed video signal is output to the monitor 32 as a video signal such as an NTSC composite signal, a Y / C separation signal (S video signal), or an RGB separation signal, whereby a subject image is displayed on the monitor 32.

  A system control circuit 22 including a processor CPU 24 controls the entire processor 10 and outputs control signals to various circuits such as the dimming circuit 23, the lamp controller 11 </ b> A of the lamp power supply 11, and the processor signal processing circuit 28. In the timing control circuit 30, a clock pulse for adjusting a signal processing timing is output to each circuit in the processor 10, and a synchronization signal accompanying the video signal is sent to the processor signal processing circuit 28. The ROM 25 stores data related to the processor type, and the RAM 26 stores data sent from the video scope 50.

  In the video scope 50, a scope control unit 56 that controls the entire video scope 50 and a data rewritable EEPROM 57 are provided, and a program related to the scope control is stored in the ROM 58 in the scope control unit 56. The scope control unit 56 reads data related to the scope characteristics from the EEPROM 57 and controls the signal processing circuit 55. When the video scope 50 is connected to the processor 10, timely data is transmitted and received between the scope control unit 56 and the system control circuit 22, and from the scope control unit 56 to the system control circuit 22 as necessary, or the system control circuit. Data is transmitted from 22 to the scope control unit 56. As will be described later, the EEPROM 57 stores data relating to brightness adjustment processing, and stores data determined based on the characteristics of the video scope.

  In the video scope 50, the brightness adjustment processing of the subject image can be executed using an electronic shutter operation, and the signal processing circuit 55 generates a luminance signal indicating the brightness of the subject image based on the image signal. To the scope control unit 56. Then, a control signal is sent from the scope control unit 56 to the signal processing circuit 55 in order to control the electronic shutter speed and the like based on the detected brightness of the entire subject image. Based on this control signal, a drive signal for adjusting the charge accumulation time in the CCD 54 is output from the signal processing circuit 55 to the CCD 54.

  A diaphragm 16 is provided between the incident end 51 </ b> A of the light guide 51 and the condenser lens 14, and is opened and closed by driving the motor 18. In the processor 10 shown in FIG. 1, the light amount adjustment of the light passing through the diaphragm 16, that is, the light irradiated to the subject S can be performed by the dimming circuit 23, and a videoscope not equipped with an electronic shutter function is connected. In some cases, the automatic light control processing by the processor 10 is executed under certain conditions. In this case, the luminance signal output from the signal processing circuit 55 is sequentially input to the dimming circuit 23, and a control signal is sent from the dimming circuit 23 to the motor driver 20 based on the luminance signal. The motor 18 is driven by a motor driver 20 so as to open and close. However, the dimming operation by the processor is not performed here.

  The front panel 96 includes a brightness level setting switch 96A for setting a reference (referenced) brightness level in brightness adjustment processing, and a metering setting switch for selectively setting average metering / peak metering. A series of panel switches PS including 96B and the like are provided. Further, the value of the weighting coefficient determined for each of the divided areas (described later) of the subject image can be set by operating the keyboard 34. On the other hand, the video scope 50 is provided with a VTR switch, a freeze switch, and a copy switch (all of which are not shown) and are operated as necessary.

  In addition, as will be described later, a brightness adjustment processing method (hereinafter referred to as a first brightness adjustment process) for performing brightness adjustment processing with contents stored in advance in the video scope 50, and an operator in the processor 10 An operation for switching the brightness adjustment processing method (hereinafter referred to as second brightness adjustment processing) for performing the brightness adjustment processing with the set contents is performed using the keyboard 34. When the switching operation is performed by the operator, the system control circuit 22 detects the switching operation and transmits a switching signal to the video scope 50.

  FIG. 2 is a diagram showing a scope control process executed by the scope control unit 56. When the video scope 50 is turned on by the power supply from the processor 10, the execution starts.

  In step S101, the CCD 54, the signal processing circuit 55, and the like are initialized, and data setting for each register in the signal processing circuit 55, setting of each variable, and the like are performed. In step S102, processing related to a switch provided in the video scope 50 is executed. Here, processing corresponding to an operation on a VTR switch, freeze switch, and copy switch (not shown) is executed, and data is transmitted from the video scope 50 to the processor 10 in accordance with the operation.

  In step S <b> 103, communication processing for the processor 10 is executed, and data is transmitted to and received from the processor 10. Further, as will be described later, data regarding brightness adjustment is set. In step S <b> 104, a control signal for controlling the function of the signal processing circuit 55 is transmitted from the scope control unit 56 to the signal processing circuit 55.

  In step S105, other processing such as time counting is executed. In step S106, brightness adjustment processing using the electronic shutter function is executed. When step S106 is executed, the process returns to step S102. Steps S102 to S106 are repeatedly executed until the power of the video scope 50 is turned off.

  FIG. 3 is a diagram showing a subroutine (initial setting process) of step S101.

  In step S201, initial setting of registers of the scope control unit 56 is executed, and in step S202, initial setting of registers such as the signal processing circuit 55 is executed. In step S203, initial setting of each variable is executed.

  In step S204, it is determined whether or not the value of the brightness adjustment processing method selection variable “aea” is 1. The value set in the brightness adjustment processing method selection variable “aea” is stored in the EEPROM 57, and is read from the EEPROM 57 and set in the brightness adjustment processing method selection variable “aea” in the previous step S203. The When the brightness adjustment processing method selection variable “aea” = 0 is set, the first brightness adjustment processing is executed. When the brightness adjustment processing method selection variable “aea” = 1 is set, the first brightness adjustment processing is executed. 2 brightness adjustment processing is executed.

  If it is determined in step S204 that the second brightness adjustment process is set (aea = 1), the process proceeds to step S205, to the processor to which command data for requesting data transmission regarding the brightness adjustment process is connected. Sent. In step S206, data relating to the brightness adjustment processing transmitted from the processor corresponding to the previous data transmission request is received. The received data is 11 bytes in total, including weighting coefficient data (9 bytes in total), photometric data (1 byte), and brightness level data (1 byte). In step S207, the received data related to the brightness adjustment processing determined or changed in setting on the processor side is set in each corresponding variable. When step S207 is executed, the subroutine ends.

  On the other hand, if it is determined in step S204 that the first brightness adjustment process is set (aea = 0), the process proceeds to step S208, and the setting item data related to the brightness adjustment process stored in advance in the EEPROM 57 is stored. Read out. In step S209, the read setting item is set. When step S209 is executed, the subroutine ends.

  FIG. 4 is a subroutine (communication processing with a processor) of step S103 of FIG.

  In step S301, it is determined whether data transmitted from the connected processor has been received. If it is determined that data from the processor is not received, the subroutine ends as it is. On the other hand, if it is determined that the data from the processor has been received, the process proceeds to step S302.

  In step S302, it is determined whether or not the data sent from the processor is switching data related to brightness adjustment processing. If it is determined that the data is switching data, the process proceeds to step S303, and the value of the brightness adjustment process selection variable “aea” is switched from 0 to 1, or from 1 to 0. That is, from the first brightness adjustment process based on the data stored in the EEPROM 57 to the second brightness adjustment process based on the data set on the processor side, or from the second brightness adjustment process to the first brightness adjustment. Switch to processing. Then, the value of the brightness adjustment process selection variable “aea” after switching is stored in the EEPROM 57. On the other hand, if it is determined that the data is not switching data, the process proceeds to step S304.

In step S304, it is determined whether the data sent from the processor is data relating to brightness adjustment processing. For data relating to Is adjustment process Ru Ming, first byte of data (hexadecimal notation) is "a1h", "a2h", represented by any one of "A3H". If it is determined that the data is not data related to brightness adjustment processing, the process proceeds to step S305, and processing according to the data is performed. On the other hand, if it is determined that the data is related to the brightness adjustment process, the process proceeds to step S306.

  In step S306, it is determined whether or not the value of the brightness adjustment process selection variable “aea” stored in the EEPROM 57 is set to 1, that is, the second brightness adjustment process is set. If it is determined that the value of the brightness adjustment process selection variable “aea” is set to 1, the process proceeds to step S307. In step S307, a setting process to be described later is executed. On the other hand, if it is determined that the value of the brightness adjustment process selection variable “aea” is not set to 1 (aea = 0), the subroutine ends.

FIG. 5 is a diagram showing a subroutine of step S307 in FIG. FIG. 6 is a diagram showing the divided areas of the subject image, and FIG. 7 is a diagram showing the addresses of the EEPROM 57 and their contents .

In the case of data relating to brightness adjustment processing, the first byte (hexadecimal notation) of the data is represented by one of “a1h”, “a2h”, and “a3h”. “A1h” indicates weighting coefficient data, “a2h” indicates photometric data, and “a3h” indicates brightness level data. In step S401, it is determined whether or not the first byte (hexadecimal notation) of the received data is “a1h”, that is, data of a weighting coefficient. In the present embodiment, the displayed subject image EF is divided into nine areas A1 to A9 as shown in FIG. 6, and a weighting coefficient is determined for each area. The value of each of the nine weighting factors is set to an integer value from 0 to 9.

  If it is determined in step S401 that the first byte is “a1h”, the process proceeds to step S402, and the values of the nine weighting factors included in the received data (second byte to tenth byte) are weighting factors. It is set (assigned) to each of the variables “aew1 to aew9”. On the other hand, if it is determined in step S401 that the first byte is not “a1h”, the process proceeds to step S403.

  In step S403, it is determined whether or not the first byte (hexadecimal notation) of the received data is “a2h”, that is, whether it is photometric data. Here, either one of average metering for calculating an average brightness value indicating average brightness and peak metering for metering in accordance with the ratio of high brightness to the entire subject image is selected and set. .

If it is determined in step S403 that the first byte is “a2h”, the process proceeds to step S404, and the photometric method data value included in the received data (second byte) is set in the photometric method variable “ae2”. The The photometry method variable “ae2” represents the photometry method, and is set to “0” in the case of the average photometry for detecting the average brightness of the subject image, and “1” in the case of the peak photometry in consideration of the high brightness observation region. Is set. On the other hand, if it is determined in step S403 that the first byte is not “a2h”, the process proceeds to step S405 .

In step S405, it is determined whether or not the first byte (hexadecimal notation) of the received data is “a3h”, that is, whether the data is of brightness level. The brightness level determines a reference brightness value that serves as a reference in brightness adjustment processing, and the reference brightness value changes according to the brightness level set by the user. Here, the brightness level data is set to an integer value of 1 to 11 (corresponding to brightness levels of -5 to +5). If it is determined that the first byte is “a3h”, the process proceeds to step S406, and the value of the brightness level data included in the received data (second byte) is set in the brightness level variable “aeb”. The On the other hand, if it is determined in step S405 that the first byte is not “a3h”, the subroutine ends.

  FIG. 8 is a diagram showing a subroutine (brightness adjustment processing) in step S106 of FIG.

  In step S501, it is determined whether or not the scanning time for one field (1/60 seconds) has elapsed since the previous brightness adjustment processing. Since the execution processing time in steps S102 to S106 in FIG. 2 is very short compared to the one-field scanning time, the brightness adjustment processing is executed in accordance with the time for obtaining luminance data corresponding to the subject image for one screen. . If it is determined that the scanning time for one field has not elapsed, the subroutine ends without performing the brightness adjustment processing. On the other hand, if it is determined that the scanning time for one field has elapsed, the process proceeds to step S502.

In step 502, the reference luminance value is set as the value of the “reference luminance variable“ aer ”based on the brightness level set in step S207, S209, or S406 of FIG. Is required.
aer = 120 + 10 * (aeb-6) (1)
In this embodiment, the luminance value of each pixel constituting the subject image is represented by 256 levels of luminance levels, and is any integer in the range of 0-255. The reference luminance value indicating the standard brightness of the entire subject image is set to any integer value from 70 to 170. When step S502 is executed, the process proceeds to step 503, where it is determined whether the value of the photometric method variable “ae2” is 0, that is, whether average photometry is set.

If it is determined in step S503 that the photometric method variable “ae2” = 0, the process proceeds to step S504. In step S 504, the luminance data is read from the signal processing circuit 55 and sent to the scope control unit 56. Since the subject image EF is divided into nine as shown in FIG. 6 , luminance data having an average luminance value of each area is read for each of the areas A1 to A9.

In step S505, a luminance average value indicating the brightness of the entire subject image is obtained as the luminance average value variable “aeo” by the following equation.
aeo = Σ (rd (j) * aew (j)) / Σaew (j)
(J = 1-9) ・ ・ (2)
Here, rd (j) represents the luminance data of each region obtained in step S504. When step S505 is executed, the process proceeds to step S506.

  In step S506, the value of the luminance average value variable “aeo” is compared with the value of the reference luminance value “aer”. In step S507, the electronic shutter speed is calculated based on the ratio or difference between the value of the brightness average value variable “aeo” and the value of the reference brightness value “aer”. When the reference luminance value is larger, the electronic shutter speed is decreased, and when the reference luminance value is smaller, the electronic shutter speed is increased. When step S507 is executed, the process proceeds to step S511, where the calculated electronic shutter speed is set in the register of the signal processing circuit 55, whereby the electronic shutter speed is adjusted, and the brightness of the subject image is adjusted. When step S511 is executed, the subroutine ends.

  On the other hand, if it is determined in step S503 that it is not average metering, that is, peak metering is set, the process proceeds to step S508. In step S508, the brightness peak value of the subject image is calculated. Here, when high-luminance pixels in the entire subject image satisfy a predetermined ratio, the luminance value serving as the threshold value is obtained as the peak value. Note that the subject image is not set to be divided in peak metering. In step S509, as in step S506, the peak value and the reference luminance value are compared. In step S510, the electronic shutter speed is calculated. When step S510 is executed, the process proceeds to step S511, the electronic shutter speed is adjusted, and the brightness of the subject image is adjusted.

  As described above, according to the present embodiment, the brightness adjustment process in which the electronic shutter operation is controlled by the video scope 50 alone is executed (S501 to 511). The brightness level, photometry method, weighting coefficient value, and the like are stored in accordance with the characteristics of the video scope 50, while the brightness level, photometry method, weighting coefficient value, and the like are determined by the operator's operation of the keyboard 34. Settings can be changed. When the first brightness adjustment process (brightness adjustment process based on data stored in the video scope) is selected in the scope power ON state, data is read from the EEPROM 57 and set (S209). On the other hand, when the second brightness adjustment process (brightness adjustment process based on the contents set on the processor side) is selected, data sent from the processor is set (S207). When the brightness adjustment process is switched by the keyboard operation by the operator (S302, S303), the brightness adjustment process is switched from the first to the second or from the second to the first.

  You may comprise so that the data regarding brightness adjustment processes other than a weighting coefficient, a brightness level, and a photometry method can be set and changed.

  Regarding switching of the brightness adjustment processing, a selector switch may be provided on the scope side.

  In the embodiment, the processor includes both the light source unit and the signal processing unit, and the light source unit and the signal processing unit are integrated. However, the light source device and the signal processing device may be provided separately from each other.

It is a block diagram of the electronic endoscope apparatus which is this embodiment. It is the figure which showed the control process of the whole scope performed by a scope control part. FIG. 3 is a diagram showing a subroutine (initial setting process) in step S101 of FIG. It is the figure which showed the subroutine (communication process with a processor) of step S103 of FIG. It is the figure which showed the subroutine (setting process) of step S307 of FIG. It is the figure which showed the division | segmentation area | region of a to-be-photographed image. It is the figure which showed the address and the contents of EEPROM. FIG. 3 is a diagram showing a subroutine (brightness adjustment processing) in step S106 of FIG.

Explanation of symbols

10 processor 50 videoscope 54 CCD (imaging device)
56 Scope Control Unit 57 EEPROM (Memory)

Claims (6)

A video scope having an image sensor and connected to either a light source device or a processor,
Brightness adjustment for executing brightness adjustment processing for controlling the electronic shutter operation on the image sensor so as to maintain a displayed subject image at an appropriate brightness according to a luminance signal based on an image signal read from the image sensor Processing means;
Regarding brightness adjustment processing, a memory capable of storing setting items determined in advance according to the characteristics of the video scope;
Receiving means for receiving brightness setting processing , which is transmitted from one of the light source device and the processor and receives setting items that can be changed by the user as data in either the processor or the light source device ;
Switching means for switching between the execution of the first brightness adjustment processing based on the setting item stored in advance in the memory and the execution of the second brightness adjustment processing based on the setting item received by the receiving means ;
The receiving means receives the switching data of the first and second brightness adjustment processing sent from one of the processor and the light source device;
The switching means switches execution of brightness adjustment processing based on the received switching data,
The video of an electronic endoscope apparatus, wherein the brightness adjustment processing means executes either a first brightness adjustment process or a second brightness adjustment process according to switching of the switching means. scope. The video scope of the electronic endoscope apparatus according to claim 1, wherein the receiving unit receives a setting item set by a keyboard operation in any one of the processor and the light source device .   The switching unit is provided in any one of the light source device and the processor, and is switched according to an operation on a switching operation unit that is operated to switch between the first brightness adjustment process and the second brightness adjustment process. The video scope of the electronic endoscope apparatus according to claim 1.   2. The setting item includes at least one of a brightness level corresponding to an appropriate brightness of the subject image and a photometry method related to a method for calculating the brightness of the entire subject image. A video scope of the electronic endoscope apparatus according to 1. The brightness adjustment processing means performs weight adjustment processing by detecting the brightness of the entire subject image by weighting each divided region defined by dividing the subject image,
The videoscope of an electronic endoscope apparatus according to claim 1, wherein the setting item is a value of a weighting coefficient of each divided region. A program related to brightness adjustment processing of a video scope having an image sensor and connected to either the light source device or the processor,
Brightness adjustment for executing brightness adjustment processing for controlling the electronic shutter operation on the image sensor so as to maintain a displayed subject image at an appropriate brightness according to a luminance signal based on an image signal read from the image sensor Processing means;
Regarding brightness adjustment processing, reading means for reading setting items determined in advance according to the characteristics of the videoscope from the memory,
Receiving means for receiving a setting item that is transmitted from one of the light source device and the processor and can be set and changed by the user in either the processor or the light source device, regarding brightness adjustment processing;
And switching means for switching between execution of the first brightness adjustment processing based on the setting item stored in advance in the memory and execution of the second brightness adjustment processing based on the setting item received by the receiving means. ,
The receiving means functions to receive the switching data of the first and second brightness adjustment processes sent from one of the processor and the light source device;
The switching unit functions the switching unit to switch execution of brightness adjustment processing based on the received switching data,
A program for causing the brightness adjustment processing means to function so as to execute either the first brightness adjustment processing or the second brightness adjustment processing in response to switching of the switching means.

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