JP4801381B2 - Electronic endoscope device - 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 the subject image displayed on the monitor at an appropriate brightness, the brightness adjustment process is performed by adjusting the charge accumulation time of the image sensor using the electronic shutter function. It can be carried out. For example, in an electronic endoscope apparatus including a video scope (electronic endoscope) having an image pickup device capable of electronic shutter operation and a processor having an electronic shutter controller, the electronic scope is connected to the processor when the video scope is connected to the processor. It is determined that the shutter operation is possible, and the electronic shutter operation is executed by the entire electronic endoscope apparatus (see Patent Document 1).
JP-A-7-39514

  In the case of a video scope that can also implement an electronic shutter operation independently of a processor by including an electronic shutter control unit, it is necessary to adjust the brightness with the electronic shutter according to the performance and model of the video scope. For example, the brightness tendency of the observed image varies depending on the target affected area such as the bronchi and the lower digestive tract (generally uniform brightness, bright only in the center, etc.), and brightness adjustment processing suitable for the connected videoscope is performed. There is a need.

  An electronic endoscope apparatus according to the present invention includes an imaging device, and a video scope capable of adjusting the brightness of a displayed subject image by adjusting a charge accumulation time and a video scope are connected to each other. And a processor having a light source for illuminating. That is, brightness adjustment processing is executed in the video scope using the electronic shutter function. The light source processing device indicates a signal processing device (processor) in which a signal processing unit and a light source unit are integrated, and also includes a light source device having only an illumination function.

  The light source processing device includes setting means capable of setting brightness setting items. Then, the video scope executes brightness adjustment processing based on the set brightness setting item. Here, the brightness adjustment item relates to the brightness adjustment processing executed in the video scope, and represents a different setting item according to each video scope. Video scopes are classified based on differences in observation sites, the number of pixels of an image sensor, and the like, and brightness setting items are determined for each connected video scope. The brightness setting item is, for example, a reference luminance level that is a standard in the brightness adjustment process, and may be a photometric method (average photometry, peak photometry, etc.) that detects the brightness of the subject image. Alternatively, when the brightness of the subject image is divided and metered, a plurality of weighting factors defined for a plurality of divided areas defined for the divided metering can be set. Furthermore, it may be possible to set a division pattern related to a plurality of division areas that are limited to perform division photometry of the brightness of the subject image.

  The setting means may be provided with an input member such as a keyboard and set the brightness setting item according to the operation by the operator, or may determine the model of the connected videoscope and set the brightness setting item. . For example, a brightness setting item input member operated to set a brightness setting item is provided, and the setting means sets the brightness setting item according to an operation on the brightness setting item input member. Alternatively, detection means for detecting the connected videoscope model and a memory capable of storing a series of brightness setting items respectively determined according to the connectable videoscope model are provided. The setting means selects and sets a brightness setting item corresponding to the detected video scope model.

  The light source processing apparatus of the present invention includes a light source for illuminating a subject, a videoscope having an image sensor, and connected to a video scope capable of adjusting the brightness of a subject image displayed by adjusting a charge accumulation time. Regarding brightness adjustment processing executed in the scope, setting means capable of setting the brightness setting item according to the connected video scope and the brightness adjustment processing based on the brightness setting item in which the video scope is set And a transmission means for notifying the video scope of brightness setting items.

  The brightness adjustment method of the present invention is a brightness adjustment method in a light source processing apparatus having an imaging device and connected to a video scope capable of adjusting the brightness of a subject image displayed by adjusting a charge accumulation time. In regard to the brightness adjustment process executed in the video scope, the brightness setting item is set according to the connected video scope, and the brightness adjustment process is executed based on the brightness setting item in which the video scope is set. In addition, the brightness setting item is notified to the video scope.

  A program according to the present invention is a program in a light source processing apparatus having an image sensor and connected to a video scope capable of adjusting the brightness of a subject image displayed by adjusting a charge accumulation time. With regard to the brightness adjustment process to be executed, setting means capable of setting the brightness setting item according to the connected video scope, and the brightness adjustment process based on the brightness setting item for which the video scope is set, And a function of transmitting a brightness setting item to the video scope.

  According to the present invention, the specification of brightness adjustment processing can be set in detail for each connected videoscope.

  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 that is an image sensor, and a processor 10 that processes an image signal read from the CCD 54, and a monitor 32 that displays a subject image based on the processed image signal, A keyboard 34 is connected to the processor 10. The video scope 50 is detachably connected to the processor 10, and is connected and detached as necessary.

  When a lamp lighting switch (not shown) is turned on, the light source 12 emits light, and light emitted from the light source 12 is provided in a video scope 50 via a condenser lens (not shown). Is incident on the incident end. The light guide 51 is an optical fiber bundle that transmits light incident on the incident end to the distal end side of the video scope 50, and the light that has passed through the light guide 51 is emitted from the emission end. As a result, the observation site S is irradiated with light through a light distribution lens (not shown) that is a diffusion lens.

  The light reflected from the observation site S irradiated with the light passes through the objective lens 53 of the video scope 50, 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, an image signal of the subject image corresponding to the color passing through the complementary color filter is generated by photoelectric conversion. Then, image signals for one frame or one field are sequentially read out at predetermined time intervals according to the color difference line sequential method. For example, the NTSC system is applied as the 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 are sent to the initial signal processing circuit 58. Sent.

  In the initial signal processing circuit 58, various processes such as amplification processing, white balance processing, and gamma correction are performed on the input image signal, thereby generating a video signal. The generated video signal is transmitted to the signal processing circuit 13 of the processor 10 and subjected to predetermined signal processing. The video signal subjected to the signal processing 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, and a subject image is displayed on the monitor 32.

  A system control circuit 22 including a CPU 24, a ROM 25, and a RAM 26 controls the entire processor 10 and outputs control signals to each circuit such as the signal processing circuit 13. The ROM 25 stores a program for operating the processor 10, and the RAM 26 stores data sent from the video scope 50. In a timing control circuit (not shown), a clock pulse for adjusting the signal processing timing is output to each circuit in the processor 10, and a synchronization signal accompanying the video signal is sent to the signal processing circuit 13.

  The CRTC 29 of the processor 10 outputs a character signal based on the control signal from the system control circuit 22. The character signal is superimposed on the video signal output from the signal processing circuit 13 at a predetermined timing, whereby the character information is displayed on the monitor 32 together with the subject image.

  In the video scope 50, a scope control unit 56 for controlling the entire video scope 50 and an EEPROM 57 capable of rewriting data are provided. The scope control unit 56 reads data from the EEPROM 57 and transmits / receives data to / from the system control circuit 22 of the processor 10. The EEPROM 57 stores data indicating the scope characteristics (such as the number of pixels of the CCD 54) and the model (type) to be observed. When the video scope 50 is connected to the processor 10, the system control circuit 22 detects the connection of the scope.

  In the video scope 50, it is possible to execute the brightness adjustment processing of the subject image using the electronic shutter function of the CCD 54, and the brightness of the subject image based on the image signal read from the CCD 54 in the initial signal processing circuit 58. Is generated and sent to the scope controller 56. Based on the detected luminance signal, a control signal for controlling the electronic shutter speed and the like is sent to the CCD drive circuit 59. The CCD drive circuit 59 outputs a drive signal for adjusting the charge accumulation time to the CCD 54 so as to maintain the brightness of the subject image constant based on the control signal.

  The front panel 96 of the processor 10 is provided with a series of panel switches such as a brightness level setting switch 96A and a dimming setting switch 96B. When operated by an operator, a signal for detecting the operation is sent to the system control circuit 22. Sent. The brightness level indicates the reference brightness (reference brightness level) when adjusting the brightness of the subject image, and can be set in 11 levels from -5 to +5. The dimming setting switch 96B is a switch for selecting a photometry method for detecting brightness, and here, either average photometry or peak photometry is selected. In average photometry, the average brightness of the entire subject image is detected. In peak photometry, brightness is detected based on a relatively high-luminance portion of the entire subject image.

  Further, division photometry is applied to detect the brightness of the subject image, and the value of the weighting coefficient corresponding to the division area can be set by an operation with the keyboard 34.

  FIG. 2 is a flowchart showing processing of the entire processor executed by the system control circuit 22 of the processor 10. When the power of the processor 10 is turned on, the processing is started.

  In step S101, each signal processing circuit, variable, and the like are initialized. In step S102, processing related to the connection of the video scope 50 is executed. In step S103, data communication with the video scope is executed, and in step S104, processing for an input operation on the keyboard 34 is executed. In step S105, processing for an operation on the panel switch is executed, and in step S106, other processing such as time display is executed. Steps S102 to S106 are repeatedly executed until the power of the processor 10 is turned off.

  FIG. 3 is a diagram showing scope processing that is a subroutine of step S102 of FIG.

  In step S201, it is determined whether or not a video scope is newly connected to the processor 10. If it is determined that a video scope is newly connected, the process proceeds to step S202, and the brightness level, photometry method (average photometry / peak photometry), and weighting coefficient data already set in the processor 10 are input to the video scope 50. Sent. The process in step S202 is a process that is executed only once when a new videoscope connection is detected. In the video scope 50, brightness adjustment processing by an electronic shutter function is executed based on the transmitted data.

  FIG. 4 is a diagram showing processing related to the operation of the keyboard 34, which is a subroutine of step S104 in FIG. FIG. 5 is a diagram showing a subject image set in a divided manner. FIG. 6 is a diagram showing a weighting coefficient setting screen.

  In step S301, it is determined whether any key on the keyboard 34 has been operated. If it is determined that no key is operated, the subroutine ends as it is. On the other hand, if it is determined that any key has been operated, the process proceeds to step S302, and it is determined whether or not the “F4” key of the keyboard 34 has been operated. The F4 key is used here to switch to a mode for setting a weighting coefficient. The weighting coefficient setting variable kw is a variable indicating whether the key input is in a normal input state or a weighting coefficient setting state. When the key input is in the normal input state, kw = 0, and when the weighting coefficient setting state is set. Is set to kw = 1.

  If it is determined in step S302 that the F4 key has been operated, the process proceeds to step S308, where the weight setting variable “kw” is set to 1. In step S309, a screen for setting a weighting coefficient is displayed. As shown in FIG. 5, the subject image is divided into nine areas EA1 to EA9 for brightness detection, and the luminance value of each divided area is calculated based on the image signal from each pixel in each divided area. Based on the luminance values of all the divided areas, the luminance value of the entire subject image is calculated. The divided areas EA1 to EA9 have weighting coefficients W1 to W9, respectively. The luminance of the entire subject image is calculated by multiplying the luminance value of each area by the weighting coefficient corresponding to each divided area. A value is calculated. The luminance value is represented by a luminance level representing the brightness level in 256 levels, and has any value from 0 to 255.

  The keys labeled with the numbers “1” to “9” on the keyboard 34 function as keys for setting the weighting coefficients W1 to W9. As shown in FIG. 6, the weighting coefficients W1 to W9 correspond to the keys. The value of is different. For example, when the “1” key is operated, the weighting coefficient W5 of the center area EA5 is set to 2, and the other weighting coefficients W1 to W4 and W6 to W9 are set to 1. The operator selects and sets a combination of weighting factors W1 to W9 according to the type and characteristics of the connected video scope. In step S309, when the screen for setting the weighting coefficient is displayed, the subroutine ends.

  On the other hand, if it is determined in step S302 that the F4 key has not been operated, the process proceeds to step S303. In step S303, it is determined whether any of the keys “1” to “9” has been operated. If it is determined that the key is not any one of “1” to “9”, the process proceeds to step S307, and processing corresponding to the operated key is executed. On the other hand, if it is determined that any of the keys “1” to “9” has been operated, the process proceeds to step S304 to determine whether or not the weight setting variable kw = 1, that is, the weight setting mode state. The

  If it is determined in step S304 that the state is not the weight setting mode, the process proceeds to step S306, and processing corresponding to the operated key is executed. On the other hand, when it is determined that the weight setting mode state is set, the process proceeds to step S305, where the values of the weighting factors W1 to W9 corresponding to the operated key are set and transmitted to the video scope 50 as data. Further, the weight setting variable kw is reset to kw = 0, and the display screen returns to the normal display.

  FIG. 7 is a diagram showing panel switch processing which is a subroutine of step S105 of FIG.

  In step S401, it is determined whether any panel switch has been operated. If it is determined that any one of the panel switches has been operated, the process proceeds to step S402, and it is determined whether or not the brightness level setting switch 96A has been operated. When it is determined that the brightness level setting switch 96A has been operated, the process proceeds to step S406, where a brightness level (reference brightness level) corresponding to the operation is set and transmitted as data to the video scope 50. On the other hand, when it is determined that the brightness level setting switch 96A is not operated, the process proceeds to step S403, and it is determined whether or not the dimming setting switch 96B is operated.

  If it is determined in step S403 that the dimming setting switch 96B has been operated, the process proceeds to step S405, where either average metering or peak metering is set in accordance with the operation, and is transmitted to the video scope 50 as data. On the other hand, if it is determined that the dimming setting switch 96B has not been operated, the process proceeds to step S404, and processing according to another operated switch is executed.

  As described above, according to the present embodiment, when the video scope 50 capable of performing the brightness adjustment processing by the electronic shutter function is connected to the processor 10, the brightness level setting switch 96A, the dimming setting switch 96B, and the keyboard 34 “ When the keys “1” to “9” are operated, the reference brightness level (−5 to +5), metering method (average metering / peak metering), and weighting factors (W1 to W9) for the brightness adjustment processing are set. It is set and transmitted as data to the video scope 50 (S305, S405, S406). In the video scope 50, the luminance value is calculated based on the transmitted data, the charge accumulation time of the CCD 54 is further adjusted, and the CCD 54 is driven so as to maintain the brightness of the subject image at an appropriate brightness. Further, when the video scope 50 is newly connected, data relating to brightness adjustment processing is transmitted to the video scope 50 (S202).

  Next, the electronic endoscope apparatus according to the second embodiment will be described with reference to FIGS. In the second embodiment, the model of the video scope to be connected is determined, and the brightness level (reference brightness level), photometry method, and weighting coefficient are set.

  FIG. 8 is a diagram showing scope processing that is a subroutine of step S102 of FIG. 2 in the second embodiment. FIG. 9 is a diagram showing the brightness level, the photometric method, and the weighting coefficient determined according to the video scope model.

  In step S501, it is determined whether or not a video scope is newly connected. If it is determined that a video scope is newly connected, the process proceeds to step S502, and the model of the video scope is determined.

  As shown in FIG. 9, four types of video scopes can be connected according to the observation site. The video scope for bronchi is “EB”, the video scope for lower gastrointestinal tract is “EC”, and the video scope for duodenum is "ED", upper gastrointestinal videoscope is represented by "EG".

  Since many tubes are branched in the bronchus, halation in which part of the subject image has high brightness and part of the subject image is projected in white tends to occur. Therefore, for the bronchial video scope EB, the photometry method is determined to be peak photometry. At peak metering, the brightness level of the entire subject image tends to be lower than that of average metering, so the brightness level is set to “+1”. In order to prevent the halation from occurring near the center of the subject image, the weighting coefficient W5 of the divided area is set to a larger value than that of the other areas.

  When observing the lower gastrointestinal tract, it is necessary to observe the entire subject image thoroughly. Therefore, when the lower gastrointestinal tract videoscope EC is connected, the photometry method is determined to be average photometry. The brightness level is set to “0”, and the weighting coefficient W5 is set to a larger value than other areas.

  When observing the duodenum, halation is unlikely to occur. Therefore, for the duodenovideoscope ED, the photometry method is set to average photometry, and the brightness level is set to “0”. Further, since the forceps are frequently used during the operation, the values of the weighting factors W2, W3, and W6 corresponding to the divided areas EA2, EA3, and EA6 where the forceps appear on the screen are smaller than those in the other areas. Determined.

  When observing the upper gastrointestinal tract such as the stomach, it is necessary to prevent the occurrence of halation during gastric angle observation. Therefore, for the upper gastrointestinal tract videoscope EG, the photometry method is set to peak photometry, and the brightness level is set to “+1”. The value of the weighting coefficient W5 corresponding to the divided area EA5 is set to a larger value than other areas in order to prevent the occurrence of halation near the center, and the weighting coefficient W1 corresponding to the divided areas EA1, EA3, EA7, EA9 at the four corners. , W3, W7, and W9 are set to relatively small values.

  When the connected videoscope model is determined in step S502, the process proceeds to step S503, where the brightness level (reference luminance level), photometry method, and weighting coefficient according to the videoscope model are set, and the videoscope is used as data. 50.

  Next, a third embodiment will be described with reference to FIGS. 10 and 11. In the third embodiment, unlike the first embodiment, a division pattern (area ratio) can be set as a setting item related to the brightness adjustment processing. About another structure, it is the same as 1st Embodiment.

  FIG. 10 is a diagram showing processing related to the operation of the keyboard 34 in the third embodiment. FIG. 11 is a diagram showing a plurality of division patterns that can be set in the third embodiment.

  The execution of step S601 is the same as that in step S301 (FIG. 4) in the first embodiment, and it is determined whether any key is operated. If it is determined that any key has been operated, the process advances to step S602 to determine whether or not the “F5” key of the keyboard 34 has been operated. Here, the F5 key is used to switch and set the division pattern for the subject image when the brightness is detected. The division pattern variable tw is a variable indicating whether the key input is in a normal input state or a state in which a division pattern is set. In the normal input state, tw = 0, and in the division pattern setting state, tw = 1. Determined.

  If it is determined in step S602 that the F5 key has been operated, the process proceeds to step S608, and the division pattern setting variable tw is set to 1. In step S609, a screen for setting a division pattern is displayed. Nine division patterns DP1 to DP9 are prepared in advance, and in FIG. 11, four division patterns DP1, DP2, DP8, and DP9 are shown. In the division pattern DP1, the size of the division area at the center is relatively large, while the areas of the four corners are relatively small. The division pattern DP2 is a pattern in which the subject image is equally divided. The division patterns DP8 and DP9 are division patterns applied particularly to the photometry of the upper gastrointestinal tract videoscope, and are selected when the photometry is performed with emphasis on the subject in the center. Keys labeled with numbers “1” to “9” on the keyboard 34 function as keys for setting the division patterns DP1 to DP9.

  If it is determined in step S602 that the F5 key has not been operated, the process proceeds to step S603, where it is determined whether any of the keys “1” to “9” has been operated. If the operated key is not any of “1” to “9”, the process proceeds to step S607, and processing corresponding to the operated key is executed. On the other hand, if it is determined that any one of the keys “1” to “9” has been operated, the process proceeds to step S604 to determine whether the division pattern variable tw = 1, that is, whether the division pattern setting mode is set. To be judged.

  If it is determined in step S604 that the mode is not the division pattern setting mode state, the process proceeds to step S606, and processing corresponding to the operated key is executed. On the other hand, if it is determined that the current state is the division pattern setting mode state, the process advances to step S605 to set a division pattern corresponding to the operation key and transmit it as data. Thereby, in the video scope, the luminance value is calculated based on the transmitted data, and the charge accumulation time is further adjusted. Further, the division pattern variable tw is reset to 0, and the display screen returns to the normal display.

Here, the brightness adjustment process executed based on the setting items related to the brightness adjustment process will be specifically described. For example, when the photometry method is set to average photometry and the division pattern DP1 shown in FIG. 11 is set, the luminance value is obtained by the following equation.

y = Σuj / n = (Σyj × sj × (n / St) × wj × (n / Wt)) / n
= N × (Σyj × sj × wj) / (St × Wt)
(1)

However, the weighting coefficient of each divided area is “wj” (j = 1 to 9), the area ratio of each divided area by the divided pattern DP1 is “sj”, the sum of the weighting coefficients is “Wt”, and the sum of the area ratios is St The luminance value of each area is “yj”, the number of area divisions is “n” (9 in this case), and the luminance value corrected by the weighting coefficient and area ratio of each division area is “uj”.

Then, based on the set brightness level, the reference brightness value (brightness level) is obtained by the following equation.

yr = 128 + 8 × m (2)

However, the reference luminance value is “yr”, and the brightness level is “m” (m = −5 to +5).

Here, it is assumed that the charge sweeping pulse number in the electronic shutter function is “nsub”, the value range of the pulse number nsub is “0-263”, and the charge accumulation time is “t”. In this case, the charge accumulation time t and the charge sweep-out pulse number nsub satisfy the following relational expression.

t = T × (263−nsub) / 263 (3)

However, the pixel signal readout time interval (= 1 field) is “T”, and here, T = 1/60 (sec).

Then, the magnitude of the calculated luminance value y and the reference luminance value yr is determined, and the charge sweep-out pulse number nsub is increased or decreased based on the following equation.

nsub = nsub + Δk (y> yr) (4)

nsub = nsub−Δk (y <yr) (5)

However, the increase / decrease value of the number of pulses is “± Δk”, and Δk takes any value from 1 to 16 based on the difference between the luminance value y and the reference luminance value yr and the value of the luminance value y.

  When the luminance value y is larger than the reference luminance value yr, the charge sweep-out pulse number nsub is increased by Δk. As a result, as is clear from the equation (3), the charge accumulation time t is shortened, and the electronic shutter operates so as to reduce the brightness of the subject image. On the contrary, when the luminance value y is smaller than the reference luminance value yr, the charge sweeping pulse number nsub is decreased by Δk. As a result, the charge accumulation time t becomes longer and the electronic shutter operates to increase the brightness of the subject image.

  As setting items related to the brightness adjustment processing, setting items other than the brightness level (reference luminance level), the photometry method, the weighting coefficient, and the division pattern may be changed. Instead of the processor including both the light source and the signal processing unit, the signal processing unit and the light source unit may be configured as independent devices. In addition to determining the scope model and setting the brightness setting item, the setting item may be set according to each connected video scope.

It is a block diagram of the electronic endoscope apparatus which is 1st Embodiment. It is the flowchart which showed the process of the whole processor performed by the system control circuit of a processor. FIG. 3 is a diagram showing scope processing which is a subroutine of step S102 of FIG. It is the figure which showed the keyboard process which is a subroutine of step S104 of FIG. FIG. 6 is a diagram showing a subject image set in a divided manner. It is the figure which showed the setting screen of the weighting coefficient. It is the figure which showed the panel switch process which is a subroutine of step S105 of FIG. It is the figure which showed the scope process in 2nd Embodiment. It is the figure which showed the brightness level, photometry system, and weighting coefficient which were defined according to the model of a video scope. It is the figure which showed the process relevant to operation of the keyboard in 3rd Embodiment. It is the figure which showed the several division pattern which can be set in 3rd Embodiment.

Explanation of symbols

10 Processor 22 System control circuit 25 ROM
26 RAM
34 Keyboard 50 Videoscope 54 CCD (Image sensor)
56 Scope Control Unit 58 Initial Signal Processing Circuit 59 CCD Drive Circuit 96A Brightness Level Setting Switch 96B Dimming Setting Switch

Claims (10)

The brightness of the displayed subject image is independently adjusted by calculating the brightness value of the subject image from the image signal read from the image sensor and adjusting the charge accumulation time based on the brightness value. Possible video scopes,
The videoscope is connected, and includes a light source processing device having a light source for illuminating a subject,
The light source processing device is
Detecting means for detecting a model of a video scope connected to the light source processing device;
Regarding brightness adjustment processing executed independently in the video scope, out of a series of brightness setting items respectively determined according to the video scope model connectable to the light source processing device , according to the connected video scope and setting means capable of setting the brightness setting item was,
A transmission means for notifying the video scope of the set brightness setting item ,
Said video scope,-out based on the brightness setting item transmitted, the electronic endoscope apparatus characterized by adjusting a charge accumulation time in accordance with the luminance value to calculate the luminance value of the subject image. The brightness setting item, Ri reference luminance level der serving as a reference in the brightness adjustment process,
2. The electronic endoscope apparatus according to claim 1, wherein the video scope adjusts the charge accumulation time by determining the magnitude of the set reference luminance level and the calculated luminance value of the subject image . The brightness setting item is, exposure metering scheme der in detecting the brightness of the subject image,
The electronic endoscope apparatus according to claim 1, wherein the video scope calculates a luminance value of a subject image based on a set photometric method . The brightness setting item, Ri plurality of weighting coefficients der defined for a plurality of divided areas defined for detection by the division photometry of the brightness of the subject image,
The electronic endoscope apparatus according to claim 1, wherein the video scope calculates a luminance value of a subject image using a set weighting coefficient . The brightness setting item, Ri division pattern der on a plurality of divided areas defined for detection by the division photometry of the brightness of the subject image,
The electronic endoscope apparatus according to claim 1, wherein the video scope calculates a luminance value of a subject image based on a set division pattern . The light source processing device further includes a brightness setting item input member operated to set the brightness setting item,
The setting means sets a brightness setting item according to an operation on the brightness setting item input member ,
The electronic endoscope apparatus according to claim 1, wherein the transmission unit transmits a brightness setting item set in accordance with an operation on the brightness setting item input member to the videoscope . The light source apparatus has a series of retractable brightness setting item memory defined respectively according to the model of the connectable videoscope,
When the video scope is newly connected , the setting means reads out and sets the brightness setting item according to the detected video scope model from the memory ,
The electronic endoscope apparatus according to claim 1, wherein the transmission unit notifies the video scope of a set brightness item . The brightness of the displayed subject image is independently adjusted by calculating the brightness value of the subject image from the image signal read from the image sensor and adjusting the charge accumulation time based on the brightness value. Possible video scopes are connected,
A light source for illuminating the subject;
Detection means for detecting the model of the connected videoscope;
Regarding the brightness adjustment process executed independently in the video scope, the brightness setting item according to the connected video scope among the series of brightness setting items respectively determined according to the model of the connectable video scope. Setting means capable of setting
Wherein to adjust the charge accumulation time in accordance with the luminance value with a video scope to calculate the luminance value of the based-out subject image brightness setting items set, the videoscope brightness setting items set A light source processing device comprising: a transmission means for informing the user. The brightness of the displayed subject image is independently adjusted by calculating the brightness value of the subject image from the image signal read from the image sensor and adjusting the charge accumulation time based on the brightness value. A brightness adjustment method in a light source processing apparatus to which a possible video scope is connected,
Detect the type of video scope connected to the light source processing device,
Regarding brightness adjustment processing executed independently in the video scope, out of a series of brightness setting items respectively determined according to the video scope model connectable to the light source processing device , according to the connected video scope Set the brightness setting item
Wherein to adjust the charge accumulation time in accordance with the luminance value with a video scope to calculate the luminance value of the based-out subject image brightness setting items set, the videoscope brightness setting items set Brightness adjustment method characterized by notifying to. The brightness of the displayed subject image is independently adjusted by calculating the brightness value of the subject image from the image signal read from the image sensor and adjusting the charge accumulation time based on the brightness value. A program of a light source processing apparatus to which a possible videoscope is connected,
The light source processing device;
Detecting means for detecting a model of a video scope connected to the light source processing device;
Regarding brightness adjustment processing executed independently in the video scope, out of a series of brightness setting items respectively determined according to the video scope model connectable to the light source processing device , according to the connected video scope and setting means capable of setting the brightness setting item was,
Wherein to adjust the charge accumulation time in accordance with the luminance value with a video scope to calculate the luminance value of the based-out subject image brightness setting items set, the videoscope brightness setting items set A communication means to inform
A program characterized by being made to function.

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