JP2001133825A - Camera with camera shake detecting function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a photographed image whose quality is excellent without having a camera shake even at the time of low luminance and in the middle of exposing an object by executing the highly accurate detection of the camera shake even though it is a small-sized and inexpensive camera. SOLUTION: This camera possesses a projecting means to project infrared rays to a material to be measured, a light-receiving means to receive the reflected light of the infrared rays projected and an arithmetic means (#207) to detect a camera-shake state during exposure by calculating an output from the light-receiving means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a camera having a function of detecting a camera shake using the output of a light receiving means.

[0002]

2. Description of the Related Art A shake detection function using a photoelectric conversion element array has been known from Japanese Patent Application Laid-Open No. 58-4109. In Japanese Patent Publication No. Hei 5-10603, an output signal from one of the first and second light receiving elements is output one time before an output signal from one of the first and second light receiving elements using an automatic focus detection device such as a camera. There has been proposed a method in which a shake amount of a camera or the like is obtained by using the latest output signal, and a focus state is detected by using outputs from the first and second light receiving elements.

Japanese Patent Application Laid-Open Nos. Sho 62-278518 and Sho 63-108326 disclose focus detection as a method for preventing a shutter chance from being missed by a camera or the like having a focus detection device capable of focus detection and shake detection. Select whether to perform both camera shake and shake detection or only focus detection.Select whether to enable shutter release only when it is determined that there is no shake, or to enable shutter release even if there is shake. Some have made it possible.

Further, Japanese Patent Application Laid-Open No. 6-67273 discloses a camera for detecting a camera shake using a focus detecting means.
A device that projects light for illuminating a subject when the brightness of the subject is low has also been proposed.

In the above conventional example, it is determined whether or not a photograph taken by a camera or the like becomes a shake photograph on the basis of all the detected shake amounts. The purpose is to prevent photographers from taking failed photos.

[0006] Various proposals have been made for detecting a shake during exposure of a subject due to a photographing release operation and correcting the photographing optical system and the obtained subject image signal. For example, by using a gyro for vibration detection or the like, the photographing optical system is corrected and driven during the subject exposure according to the output value, or the subject image signal is corrected so that the obtained subject image does not become a shake image. There is something to do.

[0007]

In the case of the shake detection function using the above-mentioned photoelectric conversion element array, generally, the exposure time becomes long, and the shake detection ability under low luminance, which is liable to be affected by camera shake, is reduced. As proposed in JP-A-6-67273, it is very effective to project light for illuminating a subject when the brightness of the subject is low. However, when visible light is projected as illumination light, when a camera shake during exposure of a subject is detected and the photographing optical system and the obtained subject image signal are corrected, a visible projection image is also included in the exposure image of the subject. And a desired high-quality image cannot be obtained.

Therefore, when a shake during exposure of a subject is detected and the photographic optical system and the obtained subject image signal are corrected, a gyro or the like for detecting vibration is used exclusively to detect a shake that does not require illumination of the subject. Means have been used. However, this method has a drawback that the apparatus becomes large and the cost is enormous.

(Object of the Invention) A first object of the present invention is to provide a small-sized, low-cost, high-precision camera-shake detection, and to have no camera-shake at low luminance even during subject exposure. An object of the present invention is to provide a camera with a camera shake detection function capable of obtaining a high quality photographed image.

A second object of the present invention is to provide a camera with a camera shake detecting function capable of obtaining a high quality photographed image by exposing an infrared film for illuminating a subject to an infrared film. Things.

A third object of the present invention is to provide a camera with a camera shake detection function capable of detecting a camera shake with higher accuracy.

[0012]

According to a first aspect of the present invention, there is provided a light emitting device for projecting infrared light onto an object to be measured. A camera with a camera shake detection function including a light receiving unit that receives reflected light of infrared light and an arithmetic unit that detects an image shake state during exposure by calculating an output from the light receiving unit.

[0013] Similarly, in order to achieve the first object,
According to a fourth aspect of the present invention, there is provided a light projecting means for projecting light on an object to be measured, a light receiving means for receiving light reflected by the light projection, and calculating a camera shake state based on an output of the light receiving means. A camera having a camera shake detecting function having an arithmetic unit, wherein when the luminance of the object to be measured or the ambient brightness of the object to be measured is higher than a predetermined level, the camera does not emit light by the light emitting unit, and performs a camera shake based on the output of the light receiving unit. The state is calculated by the arithmetic means, and in a state where the luminance of the object to be measured or the ambient luminance of the object to be measured fluctuates beyond a predetermined range, regardless of the luminance level, the state in which the light projecting means emits light is used. A camera shake detecting function, characterized by comprising control means for causing the arithmetic means to calculate a camera shake state based on an output difference of the light receiving means and an output of the light receiving means when the light emitting means is in a non-light emitting state. What to use as a camera A.

Further, in order to achieve the second object,
According to a fifth aspect of the present invention, there is provided a light projecting means for projecting infrared light to an object to be measured, a light receiving means for receiving reflected light of the projected infrared light, and an output from the light receiving means. A camera having a camera shake detection function, comprising: arithmetic means for detecting a camera shake state by performing an arithmetic operation; and, when the film loaded is an infrared film, light projection control means for inhibiting the emission of the infrared light. It is.

In order to achieve the third object,
According to an eleventh aspect of the present invention, there is provided a light projecting means for projecting light on an object to be measured, a light receiving means for receiving light reflected by the light projection, and detecting a camera shake state based on an output from the light receiving means. A first calculating means for detecting distance information based on an output from the light receiving means at a timing different from the detection timing of the camera shake state. A camera with a camera shake detection function is configured so that the light range is different between when the distance measurement information is obtained and when the camera shake state is detected.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIGS. 1 to 6 are diagrams according to a first embodiment of the present invention, and FIG. 1 is a camera equipped with a shake detection function of the present invention using both active type and passive type distance measuring devices. FIG. 2 is an electric block diagram conceptually showing the whole of FIG.

In FIG. 1, reference numerals 11, 12, and 13 denote infrared light emitting elements (hereinafter referred to as IREDs) which are light emitting elements used in an active multipoint distance measuring apparatus.
D11 is almost the center of the shooting screen, IRED12 is the right side of the shooting screen, IRED13 is the left side of the shooting screen,
Each is for distance measurement. 15 is the IRE
IRED for selecting and blinking D11-13
A driving circuit 51 is a light projecting lens for condensing infrared light emitted from the IREDs 11 to 13 and projecting the infrared light on a subject.
Together, they constitute the light projecting means of the active multipoint distance measuring apparatus.

Reference numerals 21 and 25 denote photoelectric conversion element arrays (hereinafter, also referred to as sensor arrays) in which a plurality of SPDs and the like are arranged. The sensor array 21 is close to the light projecting means, and the sensor array 25 is arranged from the light projecting means. Are located away from each other. 22 is an ON output circuit for outputting a signal when the light emitting means is ON (light emitting) out of the outputs from the sensor array 21, and 23 is the light emitting output among the outputs from the sensor array 21. An OFF output circuit for outputting a signal when the unit is OFF (non-light projection); and 24, the output from the sensor array 21 in which the light projection unit is ON
This is a difference output circuit that outputs a difference signal between when light is emitted (light is emitted) and when light is emitted (is not emitted). 26 is an output from the sensor array 25, the light emitting means is ON.
ON output circuit that outputs a signal during (light emission), 2
7 is a signal output from the sensor array 25 for outputting a signal when the light emitting means is OFF (non-light emitting).
The FF output circuit 28 outputs the output from the sensor array 25 when the light emitting means is ON (light emitting) and when the light emitting means is OFF.
This is a difference output circuit that outputs a difference signal when F (non-light projection) is performed. The sensor array 21 to the difference output circuit 28 constitute a skim CCD 20 known in Japanese Patent Application Laid-Open No. 9-105624 and the like.

Reference numerals 61 and 62 denote light receiving lenses for forming light from an object to be measured on the sensor arrays 21 and 25, and together with the skim CCD 20, constitute light receiving means of a distance measuring device.

Reference numeral 29 denotes a distance detecting circuit for detecting a distance from each output of the light receiving means, for example, the outputs of the ON output circuits 22 and 26, the outputs of the OFF output circuits 23 and 27, or the difference output circuit 24. And 28 output
The distance to the subject is calculated by a method known in, for example, Japanese Patent No. 105624. Reference numeral 30 denotes a camera shake of a camera held by a photographer by an ON output circuit 22, an OFF output circuit 23, and a difference output circuit 24, which are sensor outputs of the side of the output from the light receiving unit which are close to the light emitting unit. This is a shake detection circuit for detecting an amount, and a method for detecting a shake uses a method that is already known in the related art. For example, the output of the ON output circuit 22 is measured with a predetermined time difference, and the output difference is calculated. In this way, the shake amount is detected. Reference numeral 31 denotes a photometric device generally used in a camera or the like that measures the luminance of the subject or the surrounding luminance.

Reference numeral 35 denotes a photographic lens for forming a subject image on a film (not shown) as an image recording medium;
Reference numeral 3 denotes a motor for shifting the photographing lens 35 in the vertical and horizontal directions of the camera.
2 and 44. A photographing lens drive circuit 45 drives the photographing lens 35 in the optical axis direction to focus on the film, and a shutter control circuit 46 includes a shutter for exposing subject light from the photographing lens 35 to the film. It is. Reference numeral 47 denotes a film feeder for setting a film on a photographing frame or rewinding a film that has been photographed.

Reference numeral 70 denotes a control circuit including a CPU, which controls each unit. For example, the camera shake amount is detected by the output from the shake detection circuit 30 and the motors 41 and 43 are controlled via the motor drive circuits 42 and 44 in accordance with the detected value. Shift,
Control such as correction is performed so that the subject image formed on the film becomes an appropriate image without shake.

Reference numeral 71 (SW1) is a switch for starting the shooting preparation operation of the camera, 72 (SW2) is a switch for starting the shooting of the camera, and the control circuit 70 is a switch for the switch SW1 and the switch SW2. When turned on at the same time, shooting (exposure) is started. 73 (IR
_FILM) is a switch for notifying the control circuit 70 that an infrared film is loaded in the camera.
The switch may be configured so that the photographer can turn it on each time. Alternatively, the configuration may be such that an infrared film is automatically recognized and transmitted to the control circuit 70.
The switches SW1, SW2, and IR_FILM are turned on by short-circuiting to GND.

FIG. 2 is a block diagram for explaining a shake detection function, which also serves as a distance measuring device mounted on the camera of FIG. 1. In FIG. Is attached.

In FIG. 2, reference numeral 10 denotes a virtual object, and it is assumed that the right half has a low reflectance and the left half has a high reflectance. 11a shows a spot image projected on the subject by the IRED 11, and this image is placed on the sensor array 21 via the light receiving lens 61 on the sensor array 21b.
, And 11c on the sensor array 25 via the light receiving lens 62.

FIGS. 3 and 4 show the state of the spot image 11b on the sensor array 21 (the sensor array close to the light projecting means) in FIGS. 1 and 2 and the state of the spot array 11b at that time. FIG. 3 shows the output when the ambient luminance is bright, and FIG. 4 shows the output when the ambient luminance is dark.

FIG. 3A shows the state of the spot image 11b on the sensor array 21, and FIG.
Reference numeral 11 denotes an output from the sensor array 21 when the light is not projected (the output of the OFF output circuit 23 in FIG. 1), and an image output corresponding to the reflectance of the subject is obtained because the ambient luminance is bright. That is, the output of the high reflectivity portion is high, and the output of the low reflectivity portion is low. The output of the boundary between the high reflectance portion and the low reflectance portion changes sharply (has an edge shape).

FIG. 3C shows the output from the sensor array 21 when the IRED 11 projects light (the output of the ON output circuit 22 in FIG. 1). An image output is obtained as if the outputs of the image 11b were added. Here, the output of the light receiving spot image 11b changes sharply at the boundary between the high reflectance portion and the low reflectance portion of the subject. The output also changes sharply at the boundary between the part where the light receiving spot image 11b is received and the part where the light receiving spot image 11b is not received.

FIG. 3D shows an output obtained by subtracting the output from the sensor array 21 when the IRED 11 is not emitting light from the output from the sensor array 21 when the IRED 11 emits light (the output of the difference output circuit 24 in FIG. 1). Thus, an image output by only the light receiving spot image 11b is obtained. here,
The output of the light receiving spot image 11b changes sharply at the boundary between the high reflectance portion and the low reflectance portion of the subject. The output also changes sharply at the boundary between the part where the light receiving spot image 11b is received and the part where the light receiving spot image 11b is not received.

FIGS. 3 (e) and 3 (f) correspond to FIG.
9 shows the output from the difference output circuit 24, but shows how the image output obtained by camera shake changes. For example, FIG.
The state shown in FIG. 3E shows a state in which the entire camera including the sensor array 21 has shaken in the clockwise direction in FIG. 2, and the state shown in FIG. Is shown. For example, the state of FIG.
Assuming that the state (f) is output with a predetermined time difference, it is possible to detect the camera shake amount from the relationship between the two image outputs by a known technique.

That is, in the difference output circuit 24 shown in FIGS. 3 (e) and 3 (f), a portion where the output sharply changes at the boundary between the high reflectance portion and the low reflectance portion of the object is the sensor array. By detecting how much the camera has moved on the camera 21, it is possible to detect the camera shake amount. Similarly, the camera shake amount of the camera can be detected by the ON output circuit 22 and the OFF output circuit 23.

It should be noted here that FIG.
In (e) and (f), even when a portion where the output changes sharply at the boundary between the portion where the light receiving spot image 11b is received and the portion where the light receiving spot image 11b is not received is detected, the camera shake amount of the camera can be reduced. Cannot be detected. this is,
This is because the position of the light receiving spot image 11b does not change due to camera shake. Therefore, the light receiving spot image 11b
It is necessary to detect the camera shake amount only by the output of the portion where the light is received. This applies not only to the case where the difference output circuit 24 detects the camera shake amount, but also to the case where the ON output circuit 22 detects the camera shake amount.

Although the description has been given of the sensor array 21 on the side close to the light projecting means, the same image output is obtained for the other sensor array 25, and the image output of the sensor arrays 21 and 25 is obtained. (For example, the ON output circuit 22
And the outputs of the OFF output circuits 23 and 27, or the outputs of the difference output circuits 24 and 28) to calculate the distance to the subject 10. is there.

As described above, FIG.
When the camera shake amount of the camera is detected based on the outputs of (d), (e), and (f), the width of the received light projection image is the camera shake amount detectable range. That is, when it is desired to widen the detectable range, the width of the received light image should be widened, that is, the width of the projected image should be widened.

FIG. 4A shows a state of the spot image 11b on the sensor array 21 in FIG. 2, which is distinguished from FIG. 3 as 21 'and 11b', respectively. FIG.
(B) Sensor array 2 when IRED 11 is not emitting light
1 '(the OFF output circuit 23 in FIG. 1). Since the ambient luminance is low, an image is not output according to the reflectance of the object, and nothing is output. FIG. 4C shows the output (ON output circuit 22 in FIG. 1) from the sensor array 21 ′ when the IRED 11 projects light.
An image output is obtained in which the output of the light receiving spot image 11b 'is added to the output when the light is not projected in (b).

However, in FIG. 4B, there is no output because the surrounding luminance is low, so that FIG. 4C shows only the output using the light receiving spot image 11b '. The output is an image output corresponding to the reflectance of the subject as shown in FIG.

FIG. 4D shows an output obtained by subtracting the output from the sensor array 21 'when the IRED 11 is not emitting light from the output from the sensor array 21' when the IRED 11 emits light (difference output circuit 24 in FIG. 1). As in the case of FIG. 3D, an image output using only the light receiving spot image 11b 'is obtained.

As shown in FIG. 4, even if the surrounding luminance is dark,
(C) Output from the sensor array 21 ′ when light is projected by the IRED 11 (ON output circuit 22 in FIG. 1)
Alternatively, an output obtained by subtracting the output from the sensor array 21 'when the IRED 11 is not emitting light from the output from the sensor array 21' when the IRED 11 emits light as shown in FIG. 4D (the difference output circuit 24 in FIG. 1). ), The camera shake amount can be detected in the same manner as described with reference to FIG.

FIG. 5 is a flowchart showing the photographing operation of the camera having the above-described configuration.

First, in step # 101, it is determined whether or not a switch SW1 for performing a shooting preparation operation is ON. If OFF, the process remains in step # 101. Also, O
If N, the process proceeds to step # 102 for executing the subroutine "vibration correction 1", and performs photometry, distance measurement, camera shake detection, and correction of the photographing lens. The subroutine "vibration correction 1" will be described later in detail.

When the subroutine "vibration correction 1" is completed in step # 102, the flow advances to step # 103 to determine whether or not the switch SW1 is turned on. If not, the flow returns to step # 101. On the other hand, switch SW
If the switch 1 is ON, the process proceeds to step # 104. Here, it is determined whether the switch SW2 for starting the photographing operation is ON.
Returning to step 102, if it is ON, the process proceeds to step # 105 to start shooting.

Here, for example, when the switch SW1 for performing the photographing preparation operation is kept ON and the switch SW2 for starting the photographing operation is kept OFF, step # 101 → # 102 → # 103 → # 104
The process proceeds to # 102, and steps # 102 to # 104 are repeated. At this time, by looking through a TTL finder through which the subject can be visually confirmed through the photographing lens of the camera, it is possible to confirm the subject whose camera shake has been corrected (there is no camera shake).

Subsequently, in step # 105, the photographing lens driving circuit 45 starts driving the photographing lens 35 in the direction of focusing the subject on the film surface in accordance with the distance information finally detected in step # 102. Then, in the next step # 106, the process again proceeds to the subroutine "vibration correction 1", in which the amount of camera shake is detected and the photographing lens is corrected. However, since there is no need to perform photometry or distance measurement, these operations may be omitted.

Thereafter, the flow advances to step # 107 to determine whether or not the photographing lens 35 is set at a desired position by using a known means. If it has not yet reached the desired position, the process returns to step # 106, and again proceeds to the subroutine "vibration correction 1", where the amount of camera shake is detected and the photographing lens is corrected. Proceeding to 108, the driving of the taking lens 35 is stopped.

In the next step # 109, the drive by the shutter control circuit 46 is started to expose the image of the subject on the film surface. In the next step # 110, the subroutine "vibration correction 1" is performed again, and It performs detection and correction of the photographing lens. However, since there is no need to perform photometry or distance measurement, these operations may be omitted. Thereafter, the process proceeds to step # 111, and it is determined using a known means whether or not the shutter open time has exceeded a predetermined time. If the predetermined time has not yet been reached, the flow returns to step # 110, and the subroutine "vibration correction 1" is performed again to detect the amount of camera shake and correct the photographing lens. On the other hand, if it has reached the predetermined time, step #
Proceed to 112 to drive the shutter to close, step # 1
Proceed to 13.

In step # 113, the subroutine "vibration correction 1" is performed again to detect the amount of camera shake and correct the photographing lens. However, the photometry and the distance measurement do not need to be performed here, so that these operations may be omitted. In the next step # 114, it is determined whether or not the shutter is completely closed by using known means. If the shutter has not been completely closed yet, the process returns to step # 113, and the subroutine "vibration correction 1" is performed again to detect the amount of camera shake and correct the photographing lens. If the shutter is completely closed, step # 113 is executed. In step 115, the correction driving of the photographing lens is terminated, and the position of the photographing lens in the film surface focusing direction is reset.

Subsequently, in step # 116, if the IRED for distance measurement and camera shake detection is turned on, the light is turned off. In the next step # 117, the next photographing frame is set in the aperture (not shown) of the camera. The film feeder 4
The film is fed by 7 and a series of photographing operations is completed.

Next, steps # 102, # 102 in FIG.
The subroutine "vibration correction 1" executed in 106, # 110, and # 113 will be described with reference to the flowchart in FIG. Here, the photometry and distance measurement operations, which are the preparatory operations for photographing, are performed simultaneously.

First, in step # 201, the brightness of the subject and the surroundings of the subject is measured by the photometric device 31, and in the next step # 202, the brightness of the subject or the surroundings of the subject measured in step # 201 is lower than a predetermined level. high,
If it is determined that the image is bright, the process proceeds to step # 208. If it is determined that the image is lower than the predetermined level and dark, the process proceeds to step # 203.

When the process proceeds to step # 203, the IRED drive circuit 54 flashes the IRED at a predetermined cycle to measure the distance to the subject and to illuminate the subject to detect the amount of camera shake. Emits light. For the sake of simplicity, it is assumed here that the IRED 11 that projects light to approximately the center of the shooting screen among the IREDs 11 to 13 in FIG. Next, in step # 204, the outputs from the sensor arrays 21 and 25 are synchronized with the blinking (ON / OFF) of the IRED 11, and only the signal when the IRED 11 is ON and the I
Only signals when the RED 11 is OFF are stored alternately and separately. Then, in the next step # 205, the accumulation amount of the signal when the IRED 11 is ON, the accumulation amount of the signal when the IRED 11 is OFF, or the accumulation amount of the signal when the IRED 11 is ON. When the difference in the accumulation amount at the time of OFF reaches a predetermined amount, the blinking light emission of the IRED 11 is stopped.

In the following step # 206, a skim CCD
The output of the difference output circuits 24 and 28, which is the output of the difference between the signal accumulation amount when the IRED 11 is ON and the accumulation amount when the IRED 11 is OFF, is used to calculate the distance to the object to be measured by a known correlation operation. Detect distance (active ranging). Then, in the next step # 207, the above step # 20
The camera shake amount of the camera based on the output of the ON output circuit 22 which is the output from the photoelectric conversion sensor array 21 close to the light projecting means and the signal output when the IRED 11 is ON among the signals accumulated in step 4 To detect. The method of detecting the amount of camera shake is already known from a conventional example, but for example, an image signal output value from a sensor array is obtained a plurality of times, and detection is performed by comparing the previous image signal output value with the latest image signal output value. is there.

Steps # 202 to # 2
08, if the IRED 11 for distance measurement and camera shake detection is turned on, the light is turned off, and the next step #
At 209, the outputs from the sensor arrays 21 and 25 are accumulated. Here, since the IRED 11 is turned off,
The same signal is output to the ON output circuits 22 and 26 and the OFF output circuits 23 and 27.

In the next step # 210, the skim CCD
From the outputs of the OFF output circuits 23 and 27, which are the outputs of 20, the distance to the object to be measured is detected by a known correlation operation (passive distance measurement). Then, the next step # 211
In the above, the camera based on the output of the OFF output circuit 23 which is an output from the sensor array 21 which is close to the light projecting means and which is a signal output when the IRED 11 is OFF, among the signals accumulated in the step # 209. The amount of camera shake is detected. The method of detecting the camera shake amount is the same as that in step # 207.

In step # 212, the above-described step # 2
07 or the camera shake amounts detected in step # 211 above, the motor drive circuits 42 and 44 in FIG.
By driving the motors 41 and 43, the photographing lens 35 is corrected and driven in the shift direction so as to cancel camera shake, and the subroutine "vibration correction 1" ends.

In this embodiment, the amount of camera shake is detected based on the output from the sensor array 21 which is close to the light projecting means, as in the principle of the active distance measuring apparatus. This is to prevent the reflected light reception image of the infrared projection light from the subject from protruding from the sensor array as much as possible.

According to the first embodiment, the following effects can be obtained.

1) Since a vibrating gyroscope or the like for detecting vibrations is unnecessary as in the prior art, it is possible to perform high-precision camera shake detection at a small size and at low cost, and to emit infrared light even at low luminance. Since light is emitted, camera shake correction can be performed, and a high-quality captured image can be obtained. Furthermore,
Since infrared light for distance measurement is projected on the subject and used as illumination for camera shake detection, the apparatus itself can be reduced in size and cost, and unless an infrared film is used, the film can be used. The camera shake can be detected even during exposure.

2) Of the plurality of sensor arrays, the amount of camera shake is detected by calculating the output from the sensor array close to the light projecting means, so that highly accurate camera shake detection can be performed without depending on the subject distance. That is, accurate camera shake detection can be performed even for a short-distance subject.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, when an infrared film is loaded in a camera, an IRED (infrared light emitting element) is not allowed to emit light during exposure.

The photographing operation of the camera is as shown in the flowchart of FIG. 5, and includes steps # 102, # 106, #
The subroutine "vibration correction 1" described in 110 and # 113 should be replaced with the subroutine "vibration correction 2" described in FIG.

In the subroutine "vibration correction 2", first, in step # 301, it is determined whether or not the photographic film is being exposed. If it is determined that the exposure is being performed, the process proceeds to step # 302, and the switch I in FIG.
It is determined whether or not R_FILM is ON. Here, if the switch IR_FILM is ON, it is determined that the film loaded in the camera is an infrared film, and the process proceeds to step # 310. If OFF, the film loaded in the camera is not an infrared film. Then, the process proceeds to step # 303. That is,
During exposure and when an infrared film is loaded in the camera, the process proceeds to step # 310 in order to prevent the light from being exposed to the film when the IRED emits light, resulting in a failure photograph. .

When it is not determined that the exposure is being performed in step # 301, and when IR_FILM is OFF in step # 302.
In the case of, the process proceeds to step # 303.

In step # 303, the brightness of the subject and the surroundings of the subject are measured by the photometric device 31, and in the next step # 304, the brightness of the subject or the surroundings of the subject measured in step # 303 is higher than a predetermined level. If it is determined that the image is bright, the process proceeds to step # 310. If it is determined that the image is lower than the predetermined level and dark, the process proceeds to step # 305.

In step # 305, the IRED flashes and emits light at a predetermined cycle in order to measure the distance to the subject and to illuminate the subject to detect the amount of camera shake. Here, for simplicity of description, among the IREDs 11 to 13 in FIG. 1, it is assumed that the IRED 11 that projects light substantially at the center of the shooting screen flashes and emits light. In the next step # 306, the outputs from the sensor arrays 21 and 25 are synchronized with the blinking (ON / OFF) of the IRED 11, and only the signal when the IRED 11 is ON and the I
Only signals when the RED 11 is OFF are stored alternately and separately. In the next step # 307, the IRE
The amount of signal accumulation when D11 is ON or the IRED
11 when the signal is OFF, or the IRED
When the difference between the signal accumulation amount when the signal 11 is ON and the accumulation amount when the signal 11 is OFF reaches a predetermined amount, the blinking light emission of the IRED 11 is turned off.

In the next step # 308, the skim CCD
The output of the difference output circuits 24 and 28, which is the output of the difference between the signal accumulation amount when the IRED 11 is ON and the accumulation amount when the IRED 11 is OFF, is used to calculate the distance to the object to be measured by a known correlation operation. Detect distance. And step # 3
In step 09, the signal stored in step # 306 is output from the sensor array 21 close to the light emitting means and output from the ON output circuit 22, which is a signal output when the IRED 11 is ON. The camera shake amount is detected based on the camera shake amount. The method of detecting the amount of camera shake is already known from a conventional example, but for example, an image signal output value from a sensor array is obtained a plurality of times, and detection is performed by comparing the previous image signal output value with the latest image signal output value. is there.

Step # 304 or step # 30
When the process proceeds from step 2 to step # 310, if the IRED 11 for distance measurement and camera shake detection is turned on, it is turned off, and in the next step # 311 the outputs from the sensor arrays 21 and 25 are accumulated. Here, since the IRED 11 is turned off, the ON output circuits 22 and 26 and the OFF output circuit 2
The same signal is output to 3, 27. Next step #
In step 312, the distance to the object to be measured is detected from the outputs of the OFF output circuits 23 and 27, which are the outputs of the skim CCD 20, by a known correlation operation. And step # 3
At 13, the signal stored in step # 311 is an output from the sensor array 21 close to the light emitting means and a signal output when the IRED 11 is OFF.
From the FF output 23, the camera shake amount is detected. The method of detecting the camera shake amount is the same as that in step # 309 described above.

In step # 314, step # 3
Based on the camera shake amount detected in step 09 or step # 313, the motors 41 and 43 are driven by the motor drive circuits 42 and 44 in FIG. 1 to correct the photographing lens 35 in the shift direction so as to cancel the camera shake. The subroutine "vibration correction 2" ends.

According to the second embodiment, when an infrared film is used, the infrared light is not projected during the exposure of the film, so that the film is not exposed to the infrared light. It is possible to obtain an appropriate photographed image.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment, when the subject luminance changes beyond a predetermined value, the detection of the camera shake amount is performed by turning on the IRED.
This is performed by the difference output between the signal at the time of the time and the signal at the time of the OFF time. This is the description of FIG.
This is based on the fact that the camera shake amount can be detected even with the difference output between the signal at N and the signal at OFF.

The photographing operation of the camera is as shown in the flowchart of FIG. 5, and includes steps # 102, # 106, #
The subroutine "vibration correction 1" described in 110 and # 113 should be replaced with the subroutine "vibration correction 3" described in FIG.

In the subroutine "vibration correction 3", first, in step # 401, the brightness of the subject and the surroundings of the subject is measured by the photometric device 31, and in the next step # 402,
It is determined whether the brightness of the subject or the surroundings of the subject measured in step # 401 has changed by a predetermined amount from the value measured last time. If the change has exceeded the predetermined amount, the process proceeds to step # 404. If the change has not exceeded the predetermined amount or the previous photometry value does not exist, the process proceeds to step # 403.
Move to.

In step # 403, the above-described step # 4
If it is determined that the luminance of the subject or the surroundings of the subject measured in step 01 is higher than a predetermined level and is bright, step # 409
Then, if it is determined that the image is darker than the predetermined level, the process proceeds to step # 404.

In step # 404, the IRED flashes and emits light at a predetermined cycle to measure the distance to the subject and to illuminate the subject to detect the amount of camera shake. Here, for the sake of simplicity, it is assumed that the IRED 11 that projects light substantially at the center of the shooting screen among the IREDs 11 to 13 in FIG. Next, in step # 405, the outputs from the sensor arrays 21 and 25 are synchronized with the blinking (ON / OFF) of the IRED 11, and only the signal when the IRED 11 is ON and the IR
Only signals when the ED 11 is OFF are stored alternately and separately. Then, in the next step # 406, the signal accumulation amount when the IRED 11 is ON, or
The amount of signal accumulation when the RED 11 is OFF, or
When the difference between the signal accumulation amount when the RED 11 is ON and the accumulation amount when the RED 11 is OFF reaches a predetermined amount, the blinking light emission of the IRED 11 is turned off.

In step # 407, the skim CCD 20
From the outputs of the difference output circuits 24 and 28, which is the output of the difference between the signal accumulation amount when the IRED 11 is ON and the accumulation amount when the IRED 11 is OFF, and the distance to the object to be measured by a known correlation operation. Is detected. And the next step # 4
At 08, the signal accumulation amount when the IRED 11 is ON and the accumulation amount when the IRED 11 is OFF are output from the sensor array 21 that is close to the light projecting means, out of the signals accumulated in the above step # 405. The amount of camera shake of the camera is detected based on the output of the difference output circuit 24 which is the output of the difference. The method of detecting the amount of camera shake is already known from a conventional example, but for example, an image signal output value from a sensor array is obtained a plurality of times, and detection is performed by comparing the previous image signal output value with the latest image signal output value. is there.

Further, Steps # 403 to # 4
09, the IRED 1 for distance measurement and camera shake detection
If 1 is turned on, it is turned off, and the output from the sensor arrays 21 and 25 is accumulated in the next step # 410. Here, since the IRED 11 is turned off, the ON output circuit 2
The same signal is output to the OFF output circuits 23 and 27 and the OFF output circuits 23 and 27. In the following step # 411, the skim CCD
From the outputs of the OFF output circuits 23 and 27, which are the outputs of 20, the distance to the object to be measured is detected by a known correlation operation. Then, in step # 412, the above step #
Of the signals accumulated in 410, the output from the sensor array 21 close to the light projecting means and the IRED 11
The camera shake amount of the camera is detected based on the output of the OFF output circuit 23 which is the signal output at the time of F. The method of detecting the camera shake amount is the same as that in step # 408.

In step # 413, step # 4
Based on the camera shake amount detected in step 08 or step # 412, the photographing lens 35 is corrected in the shift direction such that the motors 41 and 43 are driven by the motor drive circuits 42 and 44 in FIG. 1 to cancel the camera shake. The subroutine "vibration correction 3" is completed.

According to the third embodiment, when the subject or the surrounding luminance of the subject changes beyond a predetermined range, the output from the sensor array when the infrared light is projected, and Since the amount of camera shake is detected by calculating the difference output between the outputs from the array when no infrared light is projected, high-precision camera shake detection independent of a change in ambient luminance can be performed. As a specific example, it is possible to prevent the camera shake amount from being erroneously detected by extraneous light when there is extraneous light of flashing strobe light of a disco.

(Fourth Embodiment) Next, FIGS.
A fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, when detecting the camera shake amount, the object is illuminated widely to expand the detection range, and the principle is also described in the description of FIG.

The photographing operation of the camera is as shown in the flowchart of FIG. 5, and includes steps # 102, # 106, #
The subroutine "vibration correction 1" described in 110 and # 113 may be replaced with the subroutine "vibration correction 4" described in FIG.

In the subroutine "vibration correction 4", first, in step # 501, the luminance of the subject and the surroundings of the subject are measured by the photometric device 31, and in the next step # 502,
If it is determined that the brightness of the subject or the surroundings of the subject measured in step # 501 is higher than a predetermined level and is bright, the process proceeds to step # 511, and if it is determined that the brightness is lower than the predetermined level and dark, the process proceeds to step # 503.

In step # 503, the IRED 11 is turned on and off at a predetermined cycle to measure the distance to the subject substantially at the center of the photographing screen. Then, in the next step # 504, the outputs from the sensor arrays 21 and 25 are
Synchronize with the blinking (ON / OFF) of RED11,
Only when the ED11 is ON, and when the IRED11
Only signals at the time of FF are alternately and separately accumulated.
In the following step # 505, the signal accumulation amount when the IRED 11 is ON, or the signal accumulation amount when the IRED 11 is OFF, or the signal accumulation amount when the IRED 11 is ON and the signal accumulation amount when the IRED 11 is OFF. When the difference in the accumulated amount reaches a predetermined amount, the blinking light emission of the IRED 11 is turned off. In the next step # 506, a known correlation is obtained from the outputs of the difference output circuits 24 and 28, which are the outputs of the skim CCD 20 and are the outputs of the difference between the signal accumulation amount when the IRED 11 is ON and the accumulation amount when the IRED 11 is OFF. The distance to the object to be measured is detected by calculation.

Subsequently, in step # 507, an IR signal is input to illuminate the subject in order to detect the amount of camera shake.
The EDs 11 to 13 are simultaneously turned on and off in a predetermined cycle. It should be noted here that the number of IREDs to be flashed and projected is increased compared to the distance measurement in steps # 503 to # 505, thereby increasing the subject illumination range. In the next step # 508, the outputs from the sensor arrays 21 and 25 are used to turn on / off the IREDs 11 to 13 (ON / OF).
F), only the signals when the IREDs 11 to 13 are ON and the signals only when the IREDs 11 to 13 are OFF are alternately and separately stored. Next step # 5
In 09, the accumulation amount of the signal when the IREDs 11 to 13 are ON, or the accumulation amount of the signal when the IREDs 11 to 13 are OFF, or the accumulation amount of the signal when the IREDs 11 to 13 are ON and the OFF amount. When the difference in the accumulation amount reaches a predetermined amount, the blinking light emission of the IREDs 11 to 13 is turned off.

In step # 510, step # 5
08, the output from the photoelectric conversion sensor array 21 which is close to the light projecting means and the IRED
ON output circuit 2 which is a signal output when 11 to 13 are ON
The camera shake amount of the camera is detected based on the output of (2). The method of detecting the amount of camera shake is already known from a conventional example, but for example, an image signal output value from a sensor array is obtained a plurality of times, and detection is performed by comparing the previous image signal output value with the latest image signal output value. is there.

When the process proceeds from step # 502 to step # 511, if the IREDs 11, 12, and 13 for distance measurement and camera shake detection are on, they are turned off, and the next step # 5
At 12, the outputs from the sensor arrays 21 and 25 are accumulated. Here, since the IREDs 11 to 13 are turned off, the ON output circuits 22, 26 and the OFF output circuits 23, 2
7, the same signal is output. Next step # 513
Then, the OFF output circuit 2 which is the output of the skim CCD 20
From the outputs of 3 and 27, the distance to the object to be measured is detected by a known correlation operation. Then, in step # 514, of the signals accumulated in step # 512, the output from the sensor array 21 close to the light emitting means and the signal output when the IREDs 11 to 13 are OFF are output. From the output of the output circuit 23, the camera shake amount is detected. The method of detecting the camera shake amount is the same as that in step # 510 described above.
Is the same as

In step # 515, step # 5
Based on the camera shake amount detected in step 10 or step # 514, the photographing lens 35 is corrected in the shift direction so as to cancel the camera shake by driving the motors 41 and 43 by the motor drive circuits 42 and 44 in FIG. Then, the subroutine "vibration correction 4" is completed.

FIG. 10 is a configuration diagram for explaining a shake detection function which also serves as a distance measuring device according to the fourth embodiment.

The point different from FIG. 2 is that, for simplicity of explanation, the subject 10 has a uniform reflectance surface, and the projected images on the subject surfaces of the infrared light emitting elements 11 to 13 are 11a and 1 respectively.
2a, 13a, and 11b, 12b, 13b are the light-receiving images on the sensor array 21 of 11a, 12a, 13a. The light reception image on the sensor array 25 is omitted.

FIG. 11A shows details of a light-receiving image on the sensor array 21 in FIG. 10, and FIG.
The difference output from the sensor array 21 in FIG. 10 is shown. FIG. 11 differs from FIG. 3 in that the number of received light images is increased from one to three, so that the camera shake amount detection range of the camera is expanded, and more accurate camera shake amount detection is enabled.

According to the fourth embodiment, when detecting the amount of camera shake, a plurality of IREDs are used to extend the projection range of infrared light when detecting camera shake rather than when measuring distance. Therefore, highly accurate camera shake detection is possible.

(Fifth Embodiment) FIGS. 12 and 13
FIG. 18 is a configuration diagram for explaining a shake detection function which also serves as a distance measuring device according to a fifth embodiment of the present invention, and is another configuration example for achieving the same effect as that of the fourth embodiment. It shows.

The fourth embodiment differs from the fourth embodiment in that a plurality of IREDs are not turned on and off when a camera shake is detected, but a diffuser is arranged in front of a light projecting means to illuminate a subject as diffuse projection light. The point is to do so.

In FIG. 12, reference numeral 91 denotes an IRED which is a light projecting element used in an active distance measuring apparatus. 92 denotes a light projecting device which collects infrared light emitted from the IRED 91 and projects the infrared light on a subject. These are optical lenses, and these form the light projecting means of the active distance measuring device.

Reference numeral 93 denotes a diffusion plate for illuminating the object by diffusing the projection light when the camera shake amount is detected. The diffusion plate is driven by a driving source (not shown) at a position where the projection light from the projection means is not affected during distance measurement. It is a configuration that can be evacuated. Reference numeral 94 denotes a uniform reflectance object, and 91a denotes diffused light on the object surface. 9
Reference numerals 7 and 98 denote sensor arrays. The sensor array 97 is arranged close to the light projecting means, and the sensor array 98 is arranged away from the light projecting means. Reference numerals 95 and 96 denote light receiving lenses for forming light from a subject on the sensor arrays 97 and 98, and reference numerals 91b and 91c denote received light images of diffused reflected light on the subject surface, respectively.

FIG. 13 is a diagram for explaining in detail a part of the light receiving portion adjacent to the light projecting means in FIG. 12, and the same portions as those in FIG. 12 are denoted by the same reference numerals.

FIG. 13A shows the state of the diffused light 91b received on the sensor array 97, and FIG.
Indicates an output from the sensor array 97 (ON output circuit: not shown).

In the description so far, it has been assumed that the projection light has a uniform light intensity distribution and that there is no variation in the sensitivity of the sensor array. However, in reality, as shown in FIG. Even though the light is reflected from the subject, the output is not always uniform. This is due to the dispersion of the light intensity distribution of the diffuse projection light and the sensor array 97.
If these variations are present and the output is uneven, it is impossible to distinguish between the subject contrast and the unevenness, and as a result, the camera shake amount may not be accurately detected.

Therefore, the output after correction when a known output correction is performed so that the output corresponding to each pixel of the sensor array 97 becomes constant when the reflected light from the uniform reflectance surface is received. FIG. 13C shows the result. This correction is
In the manufacturing process of the shake detection function in the present embodiment, the shake detection function may be performed by a known method. Further, the coefficients for correction are stored in a non-volatile storage unit (for example, EE).
The value may be stored in a PROM or the like, and the value may be read out when the camera shake amount is detected to perform output correction.

The other operations are clear from the description so far, and the description is omitted.

According to the fifth embodiment, when the amount of camera shake is detected, the range of projection of infrared light from the IRED is widened using the diffusion plate 93. Camera shake detection can be performed.

Further, when the reflected light is received from the uniform reflection surface of the projected light, output correction is performed in, for example, an adjustment stage so that the output corresponding to each pixel of the sensor array becomes constant. By detecting the amount of camera shake based on the output of, the camera shake can be detected with higher accuracy.

(Modification) In each of the above-described embodiments, the camera shake amount is detected and corrected during the period from the photographing preparation operation to the end of exposure, but these operations are limited to the above-described period. Instead, the camera shake amount may be detected and corrected only during the exposure, for example.The camera shake amount may be detected during the period from the shooting preparation operation to the end of the exposure, and the correction may be performed only during the exposure. It may be performed.

The detection and correction of the camera shake amount in the camera with a camera shake detection function have been described above.
When it is desired to detect only the amount of camera shake, for example, only the light projecting unit, the light receiving unit, the shake detection circuit 30 and the control circuit 70 shown in FIG. 1 may be used to eliminate unnecessary components. By doing so, the camera shake detection function can be made independent, the processing load on the CPU and the like can be reduced, and the period of continuous camera shake detection can be shortened, so that the camera shake detection can be performed in real time. Further, application to various devices other than the camera becomes easy.

In each of the above embodiments, an active distance measuring system has been described as an example. However, a passive distance measuring system can be similarly applied.

[0105]

As described above, according to the first or second aspect of the present invention, while being small in size and low in cost,
An object of the present invention is to provide a camera with a camera shake detection function capable of performing high-precision camera shake detection and obtaining a high-quality captured image without camera shake even at low luminance or during subject exposure.

According to the fifth aspect of the present invention, there is provided a camera with a camera shake detection function capable of obtaining a high quality photographed image by not exposing an infrared film for illuminating a subject to an infrared film. It can be provided.

According to the eleventh aspect of the present invention,
An object of the present invention is to provide a camera with a camera shake detection function capable of performing more accurate camera shake detection.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a camera with a camera shake detection function according to each embodiment of the present invention.

FIG. 2 is a diagram showing a part of a configuration of a distance measurement and camera shake detection function according to the first embodiment of the present invention.

FIG. 3 is a diagram for explaining a camera shake amount detection operation according to the first embodiment of the present invention.

FIG. 4 is a diagram for explaining a camera shake amount detection operation according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing an operation of a main part of the camera according to each embodiment of the present invention.

FIG. 6 is a flowchart illustrating a subroutine of camera shake correction 1 according to the first embodiment of the present invention.

FIG. 7 is a flowchart showing a subroutine of camera shake correction 2 according to the second embodiment of the present invention.

FIG. 8 is a flowchart showing a subroutine of camera shake correction 3 according to a third embodiment of the present invention.

FIG. 9 is a flowchart illustrating a subroutine of camera shake correction 4 according to a fourth embodiment of the present invention.

FIG. 10 is a diagram showing a part of a configuration of a distance measurement and camera shake detection function in a camera according to a fourth embodiment of the present invention.

FIG. 11 is a diagram for describing a camera shake amount detection operation according to a fourth embodiment of the present invention.

FIG. 12 is a diagram illustrating a part of a configuration of a distance measurement and camera shake detection function in a camera according to a fifth embodiment of the present invention.

FIG. 13 is a diagram for explaining a camera shake amount detection operation according to a fifth embodiment of the present invention.

[Explanation of symbols]

 11-13,91 IRED 15 IRED drive circuit 21,25,97,98 Sensor array 22,26 ON output circuit 23,27 OFF output circuit 24,28 Difference output circuit 29 Distance detection circuit 30 Shake detection circuit 51,92 Light emission Lens 61, 62, 95, 96 Light receiving lens 70 Control circuit (including CPU) 93 Diffusion plate

Claims (19)

[Claims] 1. A light projecting means for projecting infrared light to an object to be measured, a light receiving means for receiving the reflected light of the projected infrared light, and an output from the light receiving means being calculated. And a calculating means for detecting a camera shake state during exposure. 2. The method according to claim 1, wherein the calculating unit calculates a difference between respective outputs of the light receiving unit when the infrared light is projected and when the infrared light is not projected, thereby detecting a camera shake state. The camera with a camera shake detection function according to claim 1. 3. The light receiving means when the object to be measured or when the ambient brightness of the object to be measured changes beyond a predetermined range, when the infrared light is projected and when the infrared light is not projected. The camera with a camera shake detection function according to claim 2, wherein the camera shake state is detected by calculating a difference output between the respective outputs. 4. A light projecting means for projecting light on an object to be measured, a light receiving means for receiving light reflected by the light projection, and an arithmetic means for calculating a camera shake state based on an output of the light receiving means. A camera having a camera shake detection function having the camera shake state based on an output of the light receiving means without performing light emission by the light emitting means when the luminance of the measured object or the surrounding luminance of the measured object is higher than a predetermined level. Means to calculate, in a state where the luminance of the DUT or the surroundings of the DUT fluctuates beyond a predetermined range, regardless of the luminance level, the light receiving means in the state where the light emitting means emits light A camera with a camera shake detection function, comprising: control means for causing the calculating means to calculate a camera shake state based on an output and an output difference of the light receiving means when the light emitting means is in a non-light emitting state. 5. A light projecting means for projecting infrared light onto an object to be measured, a light receiving means for receiving reflected light of the emitted infrared light, and an output from the light receiving means being calculated. A camera with a camera shake detection function, comprising: a calculation means for detecting a camera shake state; and a light emission control means for inhibiting the emission of the infrared light when the film loaded is an infrared film. 6. The camera with a camera shake detection function according to claim 5, wherein the light projection control unit prohibits the projection of the infrared light during a period of exposure to the infrared film. 7. When the emission of the infrared light is prohibited,
The camera with a camera shake detection function according to claim 5, wherein the calculation unit detects a camera shake state based on an output obtained by the light receiving unit when the light is not projected. 8. The camera according to claim 5, wherein even when the infrared film is loaded, a camera shake state is detected in a light emitting state during an operation related to photographing by a camera other than an exposure period. Camera with camera shake detection function as described. 9. A plurality of light receiving means are arranged at a predetermined distance from the light emitting means, and the calculating means detects a camera shake state based on an output from the light receiving means close to the light emitting means. The camera with a camera shake detection function according to any one of claims 1 to 8, wherein 10. The camera with a camera shake detection function according to claim 1, wherein the light projecting unit is a unit used for measuring a subject distance. 11. A light projecting means for projecting light on an object to be measured, a light receiving means for receiving light reflected by the light projection, and a first means for detecting a camera shake state based on an output from the light receiving means. Calculating means, and a second calculating means for detecting the distance measurement information based on the output from the light receiving means at a timing different from the detection timing of the camera shake state, the light projection range by the light emitting means, A camera with a camera shake detection function, wherein the camera is provided with a different function when obtaining the distance measurement information and when detecting a camera shake state. 12. The camera with a camera shake detection function according to claim 11, wherein the light projection range is expanded more when detecting a camera shake state than when obtaining distance measurement information. 13. A plurality of light receiving means are arranged at a predetermined distance from the light emitting means, and the number of light receiving means used in detecting a camera shake state is larger than that in obtaining distance measurement information. The camera with a camera shake detection function according to claim 12. 14. The apparatus according to claim 12, wherein when detecting a camera shake state, a diffusing means is inserted on the light projecting side of the light projecting means to enlarge the light projecting range. Camera with camera shake detection function. 15. The light receiving means is formed of a photoelectric conversion element array composed of a plurality of pixels, and corresponds to each pixel of the photoelectric conversion element array when receiving light reflected from the uniform reflection surface by the light projection. The camera with a camera shake detection function according to any one of claims 1 to 14, wherein output correction is performed so that the corrected output becomes constant, and a camera shake state is detected based on the corrected output. 16. The light receiving means is formed by a photoelectric conversion element array composed of a plurality of pixels, and among outputs from the photoelectric conversion element array, only outputs including reflected light by the light projection are used for calculation. 16. The camera with a camera shake detection function according to claim 1, wherein a camera shake state is detected. 17. The camera with a camera shake detection function according to claim 4, wherein said light projecting means posts infrared light. 18. The method according to claim 1, wherein the calculating means calculates a change in a light receiving state of an image received from the device under test at a predetermined time interval by the light receiving means to obtain a camera shake state. The camera with a camera shake detection function according to any one of claims 1 to 17, characterized in that: 19. The apparatus according to claim 1, wherein said light receiving means is a photoelectric conversion element array comprising a plurality of pixels.
18. The camera with a camera shake detection function according to claim 14.