JP2000050162A - Image pickup method and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image pickup device capable of displaying continuously picked up images and to be easily made in small size and light weight. SOLUTION: Plural pieces of image data are obtained by moving a shutter 3 by every one frame to be picked up when the correction data of fixed pattern noise are acquired, by a fixed pattern noise(FPN) control part 10. The correction data as the image data at a position where light is shielded by the shutter 3 in a picked up image are stored in an FPN memory 9. The image data at an other position where no light is shielded, are alternately stored in two frame memories 7, 8. The image data are corrected by the correction data and are displayed on a display 6. Only a part of the image where the light is partially shielded becomes discontinuous during acquisition of the correction data of the fixed pattern noise and the correction data are acquired without imparing the continuity. The shutter 3 can be made in the size since the size of the shutter 3 may be a degree as only the light is shielded by covering a part of an infrared detector 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for correcting a picked-up image using correction data for fixed pattern noise obtained from a correction member.

[0002]

2. Description of the Related Art Conventionally, for example, in an infrared imaging apparatus, fixed pattern noise (Fix Pattern Noise) unique to the apparatus, such as variation in sensitivity of an infrared detector, variation in circuit gain and offset, and the like.
e: FPN), there is a problem that even if an image is taken on a uniform temperature surface, the obtained image screen is not uniform.

Therefore, as described in Japanese Patent Application Laid-Open No. 9-163233, for example, a target such as a shutter having a uniform temperature distribution surface over the entire screen is imaged, and the variation in the obtained image signal is corrected for fixed pattern noise. A configuration is employed in which the data is stored in a memory or the like as data, and correction such as subtraction of the image signal obtained by actually capturing an image with the stored correction data is performed.

That is, as shown in FIG. 31, a shutter as a correction member having a uniform temperature surface is provided between an infrared lens and an infrared detector at an intermediate image forming position by the infrared lens so as to be able to advance and retreat. Then, during normal imaging,
The shutter is retracted as shown in FIG. When correcting the fixed pattern noise, as shown in FIG. 33, the infrared lens and the infrared detector are arranged so that the uniform temperature surface of the shutter is located at the intermediate image forming position by the infrared lens and faces the front of the infrared detector. To get the signal for correction. Then, the obtained correction data is
The image signal is stored in a memory or the like, and the image signal obtained at the time of normal imaging is corrected by subtraction or the like using correction data, and is stored in a frame memory or the like.

However, in the conventional imaging apparatus described in Japanese Patent Application Laid-Open No. 9-163233, as shown in FIGS. 31 to 33, when acquiring correction data for correcting fixed pattern noise, the shutter is operated by infrared rays. There is a problem in that the entire front surface of the detector is temporarily covered, infrared information from a subject which is a target to be actually imaged is blocked, and no image can be captured, and a captured image cannot be displayed.

[0006] Therefore, immediately before acquiring correction data for correcting the fixed pattern noise, the captured image of the display device for displaying the captured image is temporarily stopped, and after the corrected data is acquired, the captured image is displayed again. A configuration for avoiding a state in which an image cannot be displayed and is interrupted is known.

[0007] However, when the captured image is stopped, the continuity of the captured image is impaired, and a smooth display of the captured image cannot be performed.

Therefore, as described in, for example, Japanese Patent Application Laid-Open No. 2-121480, a target is imaged at a high speed so that the number of images to be displayed is larger than the number of images to be displayed. When acquiring the correction, the correction shutter is advanced to the front of the infrared detector to acquire the correction data,
A configuration is adopted in which a portion other than the captured image of the correction data is displayed.

[0009]

However, in the configuration described in Japanese Patent Application Laid-Open No. 2-121480, a frame rate higher than necessary is required, and the entire circuit must be speeded up. There is a burden. In addition, a large shutter that covers the entire front surface of the infrared detector must be driven at a high speed, which places a load on the driving configuration. For this reason, there is a problem that a driving unit for driving-resistant load is required and the device becomes large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an imaging method and an imaging apparatus capable of continuously displaying captured images and easily reducing the size and weight.

[0011]

According to a first aspect of the present invention, there is provided an image pickup method comprising: a shutter for correction facing only a part of one surface of a detecting means for outputting image data when an object is formed on one surface; The shutter moves in synchronization with the movement of the shutter, and a plurality of images are taken. The correction data included in a plurality of image data obtained by the imaging and output from the detection means in accordance with the position of the shutter causes the shutter to operate. The image data at the position corresponding to the position is corrected.

According to a second aspect of the present invention, in the imaging method of the first aspect, image data captured in synchronization with movement of the shutter is sequentially stored in a plurality of memories, and the stored image data is displayed. Image data that cannot be obtained by being shielded from light by the movement of the shutter is displayed based on image data stored in advance before the light is shielded.

According to a third aspect of the present invention, in the imaging method of the first or second aspect, the shutter corrects the image data by an average value of a plurality of correction data obtained at the same position.

According to a fourth aspect of the present invention, there is provided the imaging method according to any one of the first to third aspects, wherein the image data shielded by the movement of the shutter is replaced with the image data at an adjacent position which is not shielded. Is calculated by the average of

According to a fifth aspect of the present invention, in the imaging method according to any one of the first to fourth aspects, the shutter moves intermittently every time an image is taken.

According to a sixth aspect of the present invention, in the imaging method according to any one of the first to fourth aspects, the shutter moves continuously, and an image is taken each time the shutter is located for each pixel. It is.

According to a seventh aspect of the present invention, in the imaging method according to any one of the first to sixth aspects, the size of the shutter in the moving direction is set for a plurality of pixels of the detecting means.
A plurality of images are taken in synchronization with the movement of the detection means for each pixel of the shutter, and an average of a plurality of obtained correction data is calculated.

According to another aspect of the present invention, there is provided an image pickup apparatus, comprising: a lens for forming an image of a subject; and a plurality of pixels on one surface on which the subject is formed by the lens, detecting an image formed and outputting image data. Detection means, a correction shutter that moves between only one part of one surface of the detection means provided with the pixel between the lens and the detection means, and an image pick-up in synchronization with the movement of the shutter. A signal processing unit that corrects the image data at a position corresponding to the position of the shutter by using correction data included in the obtained plurality of image data and output in accordance with the position of the shutter. is there.

According to a ninth aspect of the present invention, there is provided the image pickup apparatus according to the eighth aspect, wherein a plurality of memories sequentially store image data obtained by synchronizing with the movement of the shutter in synchronization with the movement of the shutter. It is provided with.

According to a tenth aspect of the present invention, in the imaging device of the ninth aspect, image data stored in a plurality of memories is displayed in synchronization with movement of a shutter.
The image data at the position shielded by the movement of the shutter is provided with a display device for displaying image data stored separately.

According to an eleventh aspect of the present invention, in the imaging device according to any one of the eighth to tenth aspects, the signal processing unit is configured to execute the image data processing based on an average value of a plurality of correction data obtained at the same position of the shutter. Is to be corrected.

According to a twelfth aspect of the present invention, in the imaging apparatus according to any one of the eighth to eleventh aspects, the signal processing unit is configured to transmit the image data at a position which is shielded by the movement of the shutter at an adjacent position. Is calculated by averaging the image data.

According to a thirteenth aspect of the present invention, in the imaging device according to any one of the eighth to twelfth aspects, the shutter moves intermittently for each image pickup.

According to a fourteenth aspect of the present invention, there is provided an image pickup apparatus according to any one of the eighth to twelfth aspects, wherein the shutter of the image pickup apparatus moves continuously, and controls the image pickup unit every time the shutter is positioned for each pixel. It is provided.

According to a fifteenth aspect of the present invention, in the imaging device according to any one of the eighth to fourteenth aspects, the shutter has a moving direction dimension formed for a plurality of pixels of the detecting means, and a signal processing unit. Is for averaging a plurality of correction data included in a plurality of image data obtained by capturing a plurality of images in synchronization with the movement of the shutter for each pixel.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the configuration of an image pickup apparatus according to an embodiment of the present invention will be described with reference to the drawings.

The imaging apparatus shown in FIG. 1 is an infrared lens 1 for collecting infrared light, which is infrared light from a target object, and converts the infrared light collected by the infrared lens 1 into an electric signal. And an infrared detector 2 for conversion. And
As shown in FIGS. 1 and 2, the imaging apparatus includes a shutter 3 that can move between the infrared lens 1 and the infrared detector 2 in a direction orthogonal to a straight line connecting the infrared lens 1 and the infrared detector 2. ing.

The infrared detector 2 is connected to a signal processor 4 for processing the converted electric signal into image data or correction data for fixed pattern noise.

Further, the signal processing unit 4 stores various data output from the signal processing unit 4 into a plurality of, for example, two frame memories (in FIG. 1, two frame memories) for storing processed image data.
A switching unit 5 for switching a signal transmission path for switching to and transmitting to the FM1, FM2) 7 and 8 and the FPN memory 9 for temporarily storing fixed pattern noise correction data is connected. Further, the switching unit 5 is connected to a display device 6 which takes out image data from the two frame memories 7 and 8 alternately, performs scan conversion, and displays the image data. In addition, FPN
The memory 9 is connected to the signal processing unit 4 and outputs the correction data stored in the signal processing unit 4.

Further, the image pickup apparatus is provided with an FPN control section 10 for controlling the drive of the switching section 5 and the shutter 3. As shown in FIGS. 3 to 6, the FPN control unit 10 includes a drive motor 11 for driving the shutter 3,
A position detector 12 for detecting the position of the shutter 3 that is moved by the drive of the drive motor 11 is provided.

As shown in FIGS. 1 to 6, one surface of the shutter 3 is located at an intermediate image forming position of the infrared lens 1 which is a focused position when viewed from the infrared detector 2. 2 and moves across the infrared detector 2 so as to cover a part of the front surface thereof. That is, the shutter 3 moves stepwise in a plurality of stages, for example, seven stages, in synchronization with each frame, which is the time for acquiring one screen of the infrared detector 2.

Next, the operation of the above-mentioned imaging apparatus will be described with reference to the drawings.

At the time of normal imaging, the shutter 3 is in the position shown in FIGS. 3 and 7, that is, the position a, and the optical path between the infrared lens 1 and the infrared detector 2 is opened so that the shutter 3 moves away from the target object. Is incident on the infrared detector 2 via the infrared lens 1. When this infrared light is incident on the infrared detector 2, a predetermined electric signal, for example, an electric signal of an image pickup signal level shown in FIG. 8 is output from the infrared detector 2. The output electric signal is subjected to signal processing into image data by the signal processing unit 4, and the FPN control unit 10 controls the switching unit 5 for each frame to store the data in the frame memories 7 and 8 alternately. The image data stored in the frame memories 7 and 8 are sequentially read out and displayed on the display device 6.

When the correction data for the fixed pattern noise is to be obtained, the drive motor 11 is driven by a signal from the FPN control unit 10, and the shutter 3 is moved to the infrared lens 1 and the infrared detector as shown in FIG. The infrared detector 2 moves so as to cover a part of the front surface of the infrared detector 2 in a direction orthogonal to a straight line connecting the two. In the state shown in FIG. 9, the infrared detector 2 is in a state where the portion shown in FIG. 7 is shielded from light, that is, the shutter 3 is at the position b, and the level of the image signal output from the infrared detector 2 is It becomes as shown in.

The FPN control unit 10 recognizes from the signal from the position detector 12 that the position of the shutter 3 is at the position b for shielding the portion of the infrared detector 2 from light, and controls the switching unit 5. Then, the electric signal of the imaging signal level in the state shown in FIG. 10 is stored in the FPN memory 9, and the electric signal of the imaging signal level in the states of FIG. When the shutter 3 is located at the position b, the display device 6 displays the image data read from the frame memory 8 stored one frame before.

Thereafter, in the next frame, the drive motor 11 is driven again by the signal from the FPN control unit 10, and FIG.
As shown in FIG. 1, the shutter 3 is moved to the position c where the portion of the infrared detector 2 shown in FIG. 7 is shielded from light. In this state, the infrared detector 2 outputs an electric signal of the image signal level shown in FIG.

Then, the FPN control unit 10 recognizes from the signal from the position detector 12 that the position of the shutter 3 is at the position c where the portion of the infrared detector 2 is shielded from light, and switches the switching unit 5. Is stored in the FPN memory 9 in the state shown in FIG. 12, and the electric signal in the state shown in FIG. 12 is stored in the frame memory 8. When the shutter 3 is located at the position c, the display device 6 displays the image data read from the frame memory 7 stored one frame before in the state of 〜, and stores the image data two frames before in the state of 〜. The read image data from the frame memory 8 is displayed.

As shown in FIG.
14, the position of d where the portion shown in FIG. 14 is shielded from light, the position of e where the portion shown in FIG. 14 is shielded from light, the position of f where the portion shown in FIG. 15 is shielded from light, and the infrared detection shown in FIG. The optical signal passes through the front surface of the container 2 and moves again to the position g where the optical path is opened, and the electric signal of the imaging signal level at the position d shown in FIG. 17 and the imaging signal at the position e shown in FIG. An electric signal of a level, an electric signal of an image signal level at a position f shown in FIG. 19, and an electric signal of an image signal level at a position g shown in FIG. 20 are obtained. Then, F stores the imaging signal level of the area at the position where the light is shielded at each position.
The PN memory 9 stores fixed pattern noise correction data for one screen as shown in FIG.

When the shutter 3 reaches the position of g and the correction data of the fixed pattern noise for one screen is stored,
The signal processing unit 4 turns on the correction of the fixed pattern noise, that is, performs an operation for correcting the fixed pattern noise, and corrects the imaging signal level of the captured image as shown by the hatched portion in FIG.

Further, when acquiring the next fixed pattern noise correction data, the shutter 3 is moved from the position g to the position a. Then, the shutter 3 is moved to the position shown in FIG.
When the portion of the infrared detector 2 shown in FIG. 19 is moved to the position f where light is shielded, the electric signal of the imaging signal level in the state shown in FIG.
The electric signal of the imaging signal level in the state of 〜 in FIG. 19 is stored in the frame memory 7, and the correction of the fixed pattern noise is turned back on. The display device 6 reads out the image data of one frame before from the frame memory 8 in the state of 〜, and reads out the image data of two frames before from the frame memory 7 in the state of 〜 and displays it.

Further, when the shutter 3 is moved to the position e where the portion of the infrared detector 2 shown in FIG. 14 is shielded from light, the electric signal of the image pickup signal level in the state shown in FIG. 18 corrects the fixed pattern noise. The power is turned off and stored in the FPN memory 9, the electric signal of the imaging signal level in the state of to in FIG. 18 is stored in the frame memory 8, and the correction of the fixed pattern noise is turned back on. The display device 6
Reads the image data of one frame before from the frame memory 7 in the state of ~, and reads the image data of two frames before from the frame memory 8 in the state of and displays them.

When the shutter 3 is sequentially moved and reaches the position a, the correction data of the fixed pattern noise is obtained again. Note that the third and subsequent correction data acquisitions
As described above, the shutter 3 is alternately moved back and forth to perform the same operation.

As described above, the storage location of the image data by the FPN control unit 10 is switched, and the image data at the light shielding position of the infrared detector 2 by the shutter 3 is stored in the frame memories 7 and 8 in which the image data of two frames before is stored And display the data, and store the electric signal of the imaging signal level at this position in the FPN memory 9 to collect the correction data, and store the image data of the previous frame as the image data at the position where the shutter 3 does not block the light. The read out and displayed frame memories 8 and 7 store the obtained electric signals in the other frame memories 7 and 8.

For this reason, while the correction data of the fixed pattern noise is being acquired, the shutter 3 only interrupts a part of the screen displayed while shielding a part of the captured image, and the other screens Since a continuous image is obtained, it is possible to acquire fixed pattern noise correction data without impairing the continuity of the displayed image.

Further, as described above, the shutter 3 may have a size enough to cover a part of the infrared detector 2 and shield light, and the downsizing of the shutter 3 can reduce the weight and size of the image pickup apparatus, thereby reducing the cost. Can be provided.

In the embodiment shown in FIGS. 1 to 21, the infrared detector 2 is described as being shielded from light on a line. Good. According to this configuration, the size of the shutter 3 can be further reduced, and the error in the obtained correction data can be reduced.

In the above description, two frame memories 7 and 8 are provided. However, a plurality of frame memories may be provided as appropriate in accordance with image data to be stored.

Further, the imaging device for infrared light has been described, but any other imaging device can be used.

Next, an imaging apparatus according to another embodiment of the present invention will be described with reference to FIG.

The embodiment shown in FIG. 22 is similar to the embodiment shown in FIG.
An arithmetic unit 13 is provided between the switching unit 5 and the FPN memory 9 in the embodiment shown in FIG. The other configuration is the same as that of the embodiment shown in FIGS. 1 to 21 and will be described using the same reference numerals. And the operation unit 13
Is obtained by temporarily storing the correction data of the fixed pattern noise and averaging it, that is, 1 obtained by moving the shutter 3.
The imaging signal levels of the correction data for the frames are integrated for a plurality of frames and stored, and are divided by the number of stored frames to average the fixed pattern noise correction data.

The operation for averaging the fixed pattern noise correction data eight times will now be described.

First, the shutter 3 is moved from the position a to the position g for each frame similarly to the embodiment shown in FIGS. 1 to 21 to acquire the first fixed pattern noise correction data, and It is stored in the memory 9. Thereafter, the shutter 3 is similarly moved from the position g to the position a to acquire the second fixed pattern noise correction data, and add the second correction data to the first correction data stored in advance. , And FPN memory 9. This operation is
After the repetition, the calculation unit 13 divides the accumulated correction data for eight times stored in the FPN memory 9 by 8, which is the number of times of acquisition, and averages the corrected data of the stable fixed pattern noise. Is obtained.

According to the embodiment shown in FIG. 22, since a plurality of acquired correction data of fixed pattern noise are averaged, noise such as quantization noise of a circuit configuration can be removed, and stable correction data can be obtained. Can be

The correction data stored in the FPN memory 9 is stored as a digital signal which is the image signal level, and can be easily averaged by a bit shift, and stable correction data can be easily obtained.

Although the embodiment shown in FIG. 22 has been described by averaging eight times, it is not limited to this number.

Next, still another embodiment of the present invention will be described with reference to FIGS.

In the embodiment shown in FIGS. 23 to 27, the width of the shutter 3 in the moving direction of the embodiment shown in FIGS. 1 to 21 is set to the size corresponding to the number of times of integrating the correction data. Things. The other configuration is the same as that of the embodiment shown in FIGS. 1 to 21 and will be described using the same reference numerals.

That is, in FIG. 23, reference numeral 14 denotes a shutter. The shutter 14 includes a predetermined number of pixels, for example, 8 out of a plurality of pixels provided in the infrared detector 2 for detecting infrared light.
The width is set to the width of the pixel. And shutter 1
4 continuously moves so as to have a moving distance of one pixel per frame.

Next, the operation of the embodiment shown in FIGS. 23 to 27 will be described with reference to the drawings. A description will be given of a pixel of one line, which is simultaneously shielded by the shutter 14 having a width of 8 pixels.

When acquiring the correction data of the fixed pattern noise, the pixels of a certain line are continuously shielded from light by the shutter 14 for eight frames. Acquire correction data continuously. Then, the continuously acquired correction data can be averaged in the same manner as in the embodiment shown in FIG. 22 to obtain stable fixed pattern noise correction data.

While the correction data of the fixed pattern noise is being obtained, the image data of the light-shielded pixel cannot be obtained, and the image data displayed corresponding to this pixel is not updated. For example, if the configuration is such that 30 frames of image data can be captured per second, 8/30 =
During 0.27 seconds, only the image data corresponding to the image becomes discontinuous, and it is almost impossible to recognize that the continuity has been impaired as a display. Display is obtained.

In the embodiments shown in FIGS. 23 to 27, the width of the shutter 14 has been described as eight pixels, but the number is not limited to this number.

Next, an imaging apparatus according to still another embodiment of the present invention will be described with reference to FIGS.

In the embodiment shown in FIGS. 28 to 30, the interpolation processing unit 15 connected to the frame memories 7 and 8 and the FPN control unit 10 of the embodiment shown in FIGS. It is provided. The other configuration is the same as that of the embodiment shown in FIGS. 1 to 21 and will be described using the same reference numerals.

In other words, in the embodiment shown in FIGS. 1 to 21, the embodiment shown in FIG. 22, and the embodiment shown in FIGS. By acquiring the correction data of the fixed pattern noise by shading the part, the image data cannot be updated in the shaded part and the image data of the previous frame is used, so the screen displayed corresponding to this part Are complemented by calculating from the adjacent image data that is not shielded, that is, by calculating the portion during which light is interrupted and complementing the display.

Next, the operation of the embodiment shown in FIGS. 28 to 30 will be described with reference to the drawings. For the sake of explanation, the width dimension of the shutter 3 is set to one line of the pixel of the infrared detector 2, and the interpolation processing by the complementary processing unit 15 is performed by averaging the lines before and after the light-shielded line in the moving direction of the shutter 3. Is calculated.

When acquiring the correction data of the fixed pattern noise, the shutter 3 located in the normal imaging state shown in FIG. 29 moves so as to cross the front of the infrared detector 2. Then, for example, as shown in FIG.
Since the infrared detector 2 is located at the middle position and the infrared detector 2 is shielded from light to acquire fixed pattern noise correction data, image data cannot be obtained due to the light shielding.
5 averages the image signal levels of the image data of the preceding and succeeding lines, and sets the obtained average value as image data.

According to the embodiment shown in FIGS. 28 to 30, partial discontinuous portions are prevented, and a continuous display screen without a sense of discomfort as a whole is obtained.

In the embodiment shown in FIGS. 28 to 30, the width dimension of the shutter 3 is set to a predetermined number of pixels to differentiate the image data before and after the light-shielded line.
It is also possible to calculate the image data of the portion that is continuously shielded by integration or the like.

[0070]

According to the present invention, only a part of the screen is interrupted by the shutter for correction and only part of the screen becomes discontinuous, and a continuous image is obtained on the other masks. The correction data of the fixed pattern noise peculiar to the apparatus can be easily acquired without impairing the continuity. If the quality of the data to be transferred does not improve even after the lapse of a predetermined time, the data transfer is stopped. For example, the quality of data that cannot be transferred normally due to the effects of fading due to rain, etc., has deteriorated. Occupying a wireless band by capturing a wireless line, a new connection by a new user can be obtained, and a user who is already transferring data can transfer data stably.

Further, the shutter can be formed in such a size that only a part of the detecting means is shielded from light, and the size of the shutter can be easily reduced.

Further, since the image data is corrected based on the average value of the correction data, more stable correction can be performed.

Further, since the average of the image data at the adjacent position where the light is not shielded is calculated to obtain the image data which is shielded by the movement of the shutter, partial discontinuous portions can be prevented and good continuous data can be obtained. Can maintain sex.

Further, since the shutter is intermittently moved for each image pickup, correction data can be easily obtained with a simple configuration.

Then, since the shutter is continuously moved and an image is taken each time the shutter is positioned for each pixel, correction data can be easily obtained with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram of an imaging apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a positional relationship among an infrared lens, an infrared detector, and a shutter.

FIG. 3 is an explanatory diagram showing a movement state of a shutter during normal imaging.

FIG. 4 is an explanatory diagram showing a movement state of a shutter when acquiring correction data of fixed pattern noise according to the first embodiment.

FIG. 5 is an explanatory diagram showing a movement state of a shutter when acquiring correction data of fixed pattern noise according to the first embodiment.

FIG. 6 is an explanatory diagram showing a movement state of a shutter at the time of normal imaging after completion of acquisition of fixed pattern noise correction data.

FIG. 7 is an explanatory diagram showing a state of a shutter located at a position a of the above.

FIG. 8 is a graph showing an image signal level from the infrared detector obtained when the shutter is located at the position a.

FIG. 9 is an explanatory diagram showing a state of a shutter located at a position b of the above.

FIG. 10 is a graph showing an image signal level from the infrared detector obtained when the shutter is located at the position b.

FIG. 11 is an explanatory diagram showing a state of a shutter located at a position c of the above.

FIG. 12 is a graph showing an image signal level from the infrared detector obtained when the shutter is located at the position c.

FIG. 13 is an explanatory diagram showing a state of a shutter located at a position d of the above.

FIG. 14 is an explanatory diagram showing a state of a shutter located at a position e of the above.

FIG. 15 is an explanatory diagram showing a state of a shutter located at a position f of the above.

FIG. 16 is an explanatory diagram showing a state of a shutter located at a position g of the above.

FIG. 17 is a graph showing an image signal level from the infrared detector obtained when the shutter is located at the position d.

FIG. 18 is a graph showing an image signal level from an infrared detector obtained when the shutter is located at a position e.

FIG. 19 is a graph showing an image signal level from the infrared detector obtained when the shutter is located at the position f.

FIG. 20 is a graph showing an image signal level from the infrared detector obtained when the shutter is located at the position g.

FIG. 21 is a graph showing an image pickup signal level when correction of the fixed pattern noise correction data obtained in the above is turned on.

FIG. 22 is a block diagram of an imaging apparatus according to another embodiment of the present invention.

FIG. 23 is an explanatory diagram showing a positional relationship among an infrared lens, an infrared detector, and a shutter of an imaging device according to still another embodiment of the present invention.

FIG. 24 is an explanatory diagram showing a movement state of a shutter immediately before light shielding at a certain line of the infrared detector.

FIG. 25 is an explanatory diagram showing the state of movement of the shutter in the first light-shielded frame on a certain line of the infrared detector.

FIG. 26 is an explanatory diagram showing a moving state of a shutter in a light-shielding fourth frame at a certain line of the infrared detector.

FIG. 27 is an explanatory diagram showing a state of movement of a shutter immediately after light is blocked at a certain line of the infrared detector.

FIG. 28 is a block diagram of an imaging apparatus showing still another embodiment of the present invention.

FIG. 29 is an explanatory diagram showing a relationship between a movement position of the shutter and an image pickup signal level.

FIG. 30 is an explanatory diagram showing a relationship between a moving position of a shutter and an image signal level in a state where the position of the infrared detector is shielded from light.

FIG. 31 is an explanatory diagram showing a positional relationship among an infrared lens, an infrared detector, and a shutter, which show a conventional imaging apparatus.

FIG. 32 is an explanatory diagram showing a movement state of a shutter during normal imaging.

FIG. 33 is an explanatory diagram showing a movement state of a shutter when acquiring correction data for fixed pattern noise.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Infrared lens which is a lens 2 Infrared detector as a detection means 3 and 14 Shutter 4 Signal processing unit 5 Switching unit 6 Display device 7 and 8 Frame memory 9 FPN memory 10 FPN control unit 13 Operation unit 15 Interpolation processing unit

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[Procedure amendment]

[Submission Date] October 25, 1999 (1999.10.
25)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011]

According to a first aspect of the present invention, there is provided an image pickup method comprising: a shutter for correction facing only a part of one surface of a detecting means for outputting image data when an object is formed on one surface; The shutter moves, and a plurality of images are taken in synchronization with the movement of the shutter.
Data is sequentially stored in a plurality of memories, and a position corresponding to the position of the shutter is determined by correction data included in a plurality of image data obtained by the imaging and output from the detection means in accordance with the position of the shutter. Correcting the image data at, and displaying the stored image data,
Image data that cannot be obtained due to light blocking due to the movement of the shutter
Data is stored in the image data stored beforehand
There is an imaging method characterized by displaying more . According to a second aspect of the present invention, there is provided the imaging method according to the first aspect, wherein the shutter corrects the image data based on an average value of a plurality of pieces of correction data obtained at the same position. 3. The imaging method according to claim 1, wherein the image data shielded by the movement of the shutter is calculated by averaging the image data at adjacent positions that are not shielded. Exists. An imaging method according to a fourth aspect of the invention resides in the imaging method according to any one of the first to third aspects, wherein the shutter moves intermittently for each imaging. 6. The imaging method according to claim 1, wherein the shutter moves continuously, and captures an image every time the shutter is positioned for each pixel. Exist. 7. The image capturing method according to claim 6, wherein a dimension in a moving direction of the shutter is set for a plurality of pixels of the detecting unit, and a plurality of images are obtained in synchronization with a movement of the shutter for each pixel of the detecting unit. The imaging method according to any one of claims 1 to 5, wherein an average of the correction data is calculated. 8. An image pickup method according to claim 7, wherein said lens has a plurality of pixels on a surface on which the subject is imaged by said lens, and detects image formed and outputs image data. And a correction shutter that moves in opposition to only a part of one surface of the detection unit provided with the pixel between the lens and the detection unit, and an image was obtained in synchronization with the movement of the shutter. A signal processing unit that corrects the image data at a position corresponding to the position of the shutter based on correction data included in a plurality of image data and output in accordance with the position of the shutter; Imaging
The obtained image data is synchronized with the movement of the shutter.
A plurality of memories for sequentially storing
Synchronizes the stored image data with the movement of the shutter
And display, and light is blocked by the movement of the shutter.
The image data at the position where the
And a display device for displaying an image. According to an eighth aspect of the present invention, there is provided the imaging apparatus according to the seventh aspect, wherein the signal processing unit corrects the image data by an average value of a plurality of correction data obtained at the same position by the shutter. 9. The imaging method according to claim 9, wherein the signal processing unit calculates the image data at the position shielded by the movement of the shutter by averaging the image data at adjacent positions. Image pickup device. The imaging method according to claim 10,
The image pickup apparatus according to any one of claims 7 to 9, wherein the shutter moves intermittently for each image pickup. The imaging method according to claim 11, wherein the shutter is provided with a control unit that continuously moves, and captures an image each time the shutter is positioned for each pixel. The imaging device described in the above. Claim 12
The imaging method according to the aspect, wherein the shutter is formed with a plurality of pixels of a size in a movement direction corresponding to a plurality of pixels of the detection unit, and the signal processing unit is configured to generate a plurality of image data in a plurality of images in synchronization with the movement of the shutter for each pixel. The image pickup apparatus according to any one of claims 7 to 11, wherein a plurality of correction data included in the image data are averaged.

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Claims (15)

[Claims] 1. A correction shutter is moved facing only a part of one surface of a detecting means for outputting image data when an object is formed on one surface, and a plurality of images are taken in synchronization with the movement of the shutter. Then, the image data at a position corresponding to the position of the shutter is corrected by the correction data included in the plurality of image data obtained by the imaging and output from the detection unit corresponding to the position of the shutter. An imaging device characterized by the above-mentioned. 2. The image data captured in synchronization with the movement of a shutter is sequentially stored in a plurality of memories, and the stored image data is displayed, and image data that cannot be obtained by being blocked by the movement of the shutter is blocked. 2. The imaging method according to claim 1, wherein the image is displayed based on previously stored image data. 3. The imaging method according to claim 1, wherein the shutter corrects the image data by an average value of a plurality of correction data obtained at the same position. 4. The imaging apparatus according to claim 1, wherein the image data shielded by the movement of the shutter is calculated by averaging the image data at adjacent positions that are not shielded. Method. 5. The imaging method according to claim 1, wherein the shutter moves intermittently each time an image is captured. 6. The imaging method according to claim 1, wherein the shutter moves continuously, and captures an image each time the shutter is positioned for each pixel. 7. A plurality of correction data obtained by setting a dimension in a moving direction of the shutter for a plurality of pixels of the detecting means, and capturing a plurality of images in synchronization with a movement of the shutter for each pixel of the detecting means. The imaging method according to claim 1, wherein an average is calculated. 8. A lens that forms an image of a subject, a detecting unit that has a plurality of pixels on one surface on which the subject is formed by the lens, detects an image formed, and outputs image data, and the lens. And a correction shutter that moves in opposition to only a part of one surface of the detection means provided with the pixel between the detection means, and a plurality of image data obtained by capturing images in synchronization with the movement of the shutter. A signal processing unit that corrects the image data at a position corresponding to the position of the shutter by using correction data included in the image data and output corresponding to the position of the shutter. 9. The image processing apparatus according to claim 8, further comprising a plurality of memories for sequentially storing image data obtained in synchronization with the movement of the shutter in synchronization with the movement of the shutter.
An imaging device according to any one of the preceding claims. 10. A display device for displaying image data stored in a plurality of memories in synchronization with movement of a shutter, and displaying image data separately stored at positions shielded by the movement of the shutter. The imaging device according to claim 9, further comprising: 11. The imaging apparatus according to claim 8, wherein the signal processing unit corrects the image data by an average value of a plurality of correction data obtained at the same position by the shutter. 12. The image processing apparatus according to claim 8, wherein the signal processing unit calculates the image data at the position shielded by the movement of the shutter by averaging the image data at adjacent positions.
12. The imaging device according to any one of claims 11 to 11. 13. The image pickup apparatus according to claim 8, wherein the shutter moves intermittently every time an image is picked up. 14. The imaging apparatus according to claim 8, wherein the shutter is provided with a control unit that moves continuously and captures an image each time the shutter is positioned for each pixel. . 15. A shutter, wherein a size in a moving direction is formed for a plurality of pixels of a detecting means, and a signal processing unit converts a plurality of image data obtained by a plurality of images in synchronization with the movement of the shutter for each pixel. 15. The imaging apparatus according to claim 8, wherein a plurality of correction data included are averaged.