DE102015114009A1 - Method and device for processing interference pixels on a detector surface of an image detector - Google Patents

Abstract

A method is proposed for processing interference pixels (S) on a detector surface (11) of an image detector (10) comprising the following steps: shifting (101) an image (B1) recorded by the image detector (10) with respect to the detector surface (11) for detecting perturbation pixels (S) on the detector surface (11), and compensating (102) the shift in a display (21) of the picked-up image (B2, B3) by a display device (20).

Description

The present invention relates to a method and a computer program product for processing interference pixels on a detector surface of an image detector. Furthermore, the present invention relates to a device for processing interference pixels on a detector surface of an image detector and a missile with such a device.

The technical field of the present invention relates to the processing of interference pixels on a detector surface of an image detector. Such an image detector is in particular part of a camera, e.g. Part of a thermal imaging camera.

Modern thermal imaging cameras often use CMT (Cadmium Mercury Telluride, Cadmium Mercury Telluride). CMT as such is poisonous. In addition, it may be difficult to maintain the crystal growth direction because it can change spontaneously in the growth process. Due to a resulting complex manufacturing process, the use of CMT material is expensive.

Furthermore, the material CMT in thermal imaging cameras tends to show spontaneous noise. Such perturbing pixels deviate spontaneously from a characteristic previously determined in a trimming operation, for example in a non-uniformity correction process, and appear in the recorded image as light or dark picture elements which have no relation to the image content of the recorded image. Furthermore, the persistence of such perturbation pixels is highly erratic, it can be a few seconds at a fixed frequency or occur at random.

For example, when using such thermal imaging cameras in reconnaissance platforms, this can lead to significant misinterpretations, especially when the searched objects are small and far away and are thus perceived as so-called point targets at a very early stage. It is also extremely problematic if the tracker of the reconnaissance platform follows this Störpixel or Fehlpixel and switches on this, so that a real goal can then no longer be tracked.

Against this background, an object of the present invention is to improve the processing of interference pixels on a detector surface of an image detector.

• a) Verschieben eines mittels des Bilddetektors aufgenommenen Bildes in Bezug auf die Detektorfläche zum Detektieren von Störpixeln auf der Detektorfläche, und
• b) Kompensieren der Verschiebung bei einer Anzeige des aufgenommenen Bildes durch ein Anzeigegerät.

According to a first aspect, a method is proposed for processing interference pixels on a detector surface of an image detector. The method comprises the following steps a) and b):

• a) shifting an image recorded by means of the image detector with respect to the detector surface for detecting interference pixels on the detector surface, and
• b) compensating the shift in a display of the captured image by a display device.

By moving the recorded image by a defined path and in a defined direction, it is possible to detect interference pixels on the detector surface. An interfering pixel, before and after the shift, maintains a signal mismatch with its immediate surroundings, that is, its neighboring pixels, and thereby becomes distinguishable from intact pixels. A detected interference pixel can advantageously be declared as such and processed electronically. In particular, the shift according to step a) is reversed again, in particular by a shift back.

Furthermore, it is possible, after the disappearance of the disturbance at a certain pixel, to deregister it as a disturbing pixel and to reuse it as a functioning intact pixel for the overall picture.

Preferably, a signal value of a particular pixel detected as a clutter pixel is replaced by an average or by a median of signal values of the pixels adjacent to the particular pixel.

Detected interference pixels are for example color-coded when using trackers, for example by a signal color, such as red.

If the entire image is displaced relative to the detector surface, for example by means of piezoelectric elements or piezoelectric devices, this displacement can be recognized by a viewer, in particular by a human observer, or by a downstream technical device, such as a display device. This could be perceived by the human observer as confusing. Therefore, this shift is compensated for the viewer and thus made invisible. For this purpose, in step b) the visible shift in the image, for example, electronically compensated, such as the fact that the two outermost columns left and right of the screen edge of the display device remain black to provide a buffer for the shift by one pixel in the horizontal direction. But it is also possible to provide a black line each top and bottom of the screen of the display device, so that can be moved in height.

It is also possible to blacken more than one row or column for a larger one To enable displacement in the event of a potential presence of a plurality of interference pixels. It is possible to provide both periodic displacement paths as well as random or quasi-random displacement paths. Due to the provision of these black zones, formed by black columns and / or lines on the display of the display device, the displacement is compensated and the viewer, in particular the human observer, no longer perceives shaking.

The image detector is in particular part of a camera, for example a thermal imaging camera, a CCD camera, an LCD camera, a CMOS camera or the like. The camera having the image detector is stabilized from the outside, for example. Alternatively or additionally, the camera preferably has an image stabilization. For the example of the thermal imaging camera, the image detector is a thermal image detector, which is realized for example as a so-called Focal Plane Array (FPA).

The display device comprises in particular a screen. The screen is decoupled, for example, from the camera that identifies the image detector. Alternatively, the display device may also be part of the camera. Furthermore, the display device is preferably coupled to a tracker for tracking targets.

The image can also be referred to as a pixel image. The pixel may also be referred to as an image, picture cell or picture element. The interfering pixel may also be referred to as an error pixel or defective pixel.

According to one embodiment, the image detector has a detector array arranged on the detector surface with a multiplicity of detector elements for providing pixels.

Upon displacement of the picked-up image relative to the detector surface, either the image may be shifted or the detector surface may be shifted, or both, the image and the detector surface, may be displaced relative to one another.

According to another embodiment, step a) comprises:
Moving the detector array by a predetermined displacement in a predetermined direction.

In particular, the detector array is then shifted back by the predetermined displacement in the opposite direction to the predetermined direction.

According to another embodiment, the predetermined displacement corresponds to a certain pixel number of pixels.

According to a further embodiment, the detector array is moved by means of piezo elements. The piezoelectric elements can advantageously effect the displacement within milliseconds. The piezoelectric elements are preferably configured to displace at least one mirror of the camera, at least one lens of the camera and / or the detector surface in order to effect the relative displacement between the image and the detector surface.

By way of example, the piezoelements can be part of an image stabilization of the camera, which comprises the image detector. The image stabilization by means of piezoelectric elements can shift the entire detector array, for example, by one or two pixels in height and / or width.

According to a further embodiment, the detector array is displaced by means of electromagnetic elements.

According to a further embodiment, exactly one piezoelement is assigned to each detector element of the detector array for moving the detector array.

In accordance with another embodiment, a particular pixel is detected as a clutter pixel if the particular pixel has a signal mismatch with its neighboring pixels both prior to shifting and after shifting. Accordingly, a pixel is detected and declared as an interference pixel if the pixel has at least a certain signal mismatch with the neighboring pixels before being shifted and after being shifted. Thus, the signal mismatch of the pixel before and after the shift is greater than a predetermined threshold to detect the pixel as a jamming pixel.

For example, the particular pixel before being moved is black and its neighbor pixels are white, and the particular pixel is still black after being moved and the adjacent pixels remain white.

• – Berechnen eines Mittelwerts von Signalwerten der zu dem bestimmten Pixel benachbarten Pixeln,
• – Ermitteln eines aktuellen Signalwerts des bestimmten Pixels,
• – Festlegen des bestimmten Pixels als Störpixel, wenn der ermittelte aktuelle Signalwert des bestimmten Pixels größer als eine Summe aus dem berechneten Mittelwert und einem Schwellwert ist.

According to another embodiment, determining the signal mismatch of the particular pixel comprises:

• Calculating an average of signal values of the pixels adjacent to the particular pixel,
• Determining a current signal value of the particular pixel,
• - determining the determined pixel as a noise if the determined current signal value of the particular pixel is greater than a sum of the calculated mean value and a threshold value.

The mean value of signal values of the pixels adjacent to the particular pixel and thus to the interfering pixel is a suitable value for the replacement of the signal value of the interfering pixel.

• – Berechnen eines Median von Signalwerten der zu dem bestimmten Pixel benachbarten Pixeln,
• – Ermitteln eines aktuellen Signalwerts des bestimmten Pixels,
• – Festlegen des bestimmten Pixels als Störpixel, wenn der ermittelte aktuelle Signalwert des bestimmten Pixels größer als eine Summe aus dem berechneten Median und einem Schwellwert ist.

According to another embodiment, determining the signal mismatch of the particular pixel comprises:

• Calculating a median of signal values of the pixels adjacent to the particular pixel,
• Determining a current signal value of the particular pixel,
• - determining the particular pixel as a clutter pixel if the determined current signal value of the particular pixel is greater than a sum of the calculated median and a threshold value.

The median of signal values of the pixels adjacent to the particular pixel and thus to the interfering pixel is also a suitable value for the replacement of the signal value of the interfering pixel. Alternatively, an interfering pixel on the display can also be hidden.

According to a further embodiment, the threshold value is adapted to a current noise environment of the image detector. As a result, the current noise environment of the image detector is advantageously compensated.

The interfering pixels are preferably managed using a blacklist. After the disappearance of a perturbation of a particular pixel identified as a perturbation pixel, that particular pixel is again deregistered from the blacklist and can be reused as a working pixel for the overall image.

According to a further embodiment, the shift according to step a) is electronically compensated by the display device.

According to a further embodiment, the shifting according to step a) is carried out at predetermined time intervals. The time intervals are in particular less than one second.

Thus, jamming pixels are never visible to the user for more than that particular time interval of, for example, less than one second.

According to another embodiment, step a) and step b) are synchronized with each other. This synchronizes the movement of the picked-up image with respect to the detector surface and the offset of the displacement, so that no wobbling or jitter is perceptible to the user.

According to another embodiment, when the captured image is displayed by the display device, a number of outer columns on both sides of the display are blackened respectively to provide a buffer for a horizontal displacement of a number of pixels corresponding to the number of pixels.

According to another embodiment, in the display of the captured image by the display device, a number of outer lines on both sides of the display are blackened respectively to provide a buffer for a vertical displacement of a number of pixels corresponding to the number of pixels.

According to another embodiment, the method comprises the following steps:
Taking the image by means of the image detector at a first frequency,
Displaying the captured image at a second frequency, wherein the first frequency is greater than or equal to twice the second frequency.

For example, the first frequency is 50 hertz or 100 hertz.

According to another embodiment, the method comprises the following steps:
Determining a frequency of external vibration excitation, and
Adjusting a correction frequency, by means of which the steps a) and b) are performed, depending on the determined frequency of the external vibration excitation.

For the example that the image detector is mounted on a vehicle, the frequency of the external vibration excitation is influenced by, for example, diesel vibration, drift or the like. The frequency of the external vibration excitation can be measured by means of a sensor and the correction frequency can be adjusted in dependence on the output signal of this sensor.

According to a second aspect, a computer program product is proposed, which causes the execution of the method according to the first aspect or according to one of the embodiments of the first aspect on a program-controlled device.

A computer program product, such as a computer program means, for example, as a storage medium, such as memory card, USB stick, CD-ROM, DVD, or even in the form of a downloadable file provided by a server in a network or delivered. This can be done, for example, in a wireless communication network by transmitting a corresponding file with the computer program product or the computer program means.

According to a third aspect, an apparatus for processing interference pixels on a detector surface of an image detector is proposed. The device comprises a first unit and a second unit. The first unit is arranged to move an image captured by the image detector with respect to the detector surface to detect glitches on the detector surface. The second unit is arranged to compensate for the shift in a display of the captured image by a display device.

The respective unit, for example the first unit, can be implemented in terms of hardware and / or software. In a hardware implementation, the unit may be implemented as a device or as part of a device, for example as a computer or as a microprocessor. In a software implementation, the unit may be embodied as a computer program product, as a function, as a routine, as part of a program code, or as an executable object.

The device can be designed, for example, as a computer program product. Furthermore, the device is for example part of a camera, e.g. Part of a thermal imaging camera.

The embodiments and features described for the proposed method apply accordingly to the proposed device.

According to a fourth aspect, an arrangement is proposed, which comprises a device for processing interference pixels on a detector surface of an image detector according to the third aspect. The arrangement is in particular a tracker of a reconnaissance platform, a missile, for example a guided missile, or an aircraft, for example an aircraft or a drone. By using the device, the range of the arrangement is increased. In particular, the calculations of rendezvous points between tracked targets and offenses such as missiles are also improved.

Further possible implementations of the invention also include not explicitly mentioned combinations of features or embodiments described above or below with regard to the exemplary embodiments. The skilled person will also add individual aspects as improvements or additions to the respective basic form of the invention.

Furthermore, the invention will be explained in more detail by means of preferred embodiments with reference to the attached figures.

1 shows a schematic flow diagram of a first embodiment of a method for processing interference pixels on a detector surface of an image detector;

2 shows a schematic block diagram of an embodiment of an image detector;

3 shows a schematic flow diagram of a second embodiment of a method for processing interference pixels on a detector surface of an image detector;

4 shows a schematic view of an embodiment of a means of the image detector of 1 recorded image;

5 shows a schematic view of an embodiment of a means of the image detector of 1 taken and shifted image with a noise pixel;

6 shows a schematic view of an embodiment of a means of the image detector of 1 recorded and shifted image without interfering pixels;

7 shows a schematic block diagram of an embodiment of a display device;

8th shows a schematic flow diagram of a first embodiment for determining a signal mismatch of a pixel;

9 Fig. 12 is a schematic block diagram of a second embodiment for determining a signal mismatch of a pixel;

10 shows a schematic block diagram of an embodiment of a device for processing interference pixels on a detector surface of an image detector; and

11 shows a schematic block diagram of an embodiment of a missile with a device according to 10 ,

In the figures, identical or functionally identical elements are provided with the same reference numerals, unless stated otherwise.

In 1 is a schematic flow diagram of an embodiment of a method for processing interference pixels S (see 5 ) on a detector surface 11 of an image detector 10 shown.

A schematic block diagram of an embodiment of such an image detector 10 is in 2 shown. The image detector 10 of the 2 includes one on the detector surface 11 arranged detector array 12 , The detector array 12 has a variety of detector elements 13 for providing pixels P. The detector elements 13 are in a matrix on the detector array 12 arranged. For clarity, the detector array 12 on the detector surface 11 of the 2 indicated only in the upper left corner. Actually, the detector array 12 on the entire detector surface 11 arranged. Further, for illustrative purposes, only one pixel of the plurality of pixels is designated by a P. The respective detector element 13 provides a signal value for the respective pixel P on the output side. The pixel P may also be referred to as an image, picture cell or picture element. The detector array 12 represents in particular a digital raster graphics, wherein the pixels P are the individual color values of the digital raster graphics.

The method according to 1 includes the following steps 101 and 102 :
In step 101 becomes one by means of the image detector 10 taken picture B1 (see 4 ) with respect to the detector surface 11 for detecting interference pixels S on the detector surface 11 moved (see 5 . 6 ). Thereby the detector array becomes 12 in particular shifted by a predetermined displacement W in a predetermined direction R. The displacement path W corresponds in particular to a specific number of pixels. For example, a displacement may correspond to one pixel or two pixels. The detector array 12 is moved in particular with piezo elements. In this case, each detector element 13 of the detector array 12 be associated with exactly one piezoelectric element.

Moving according to step 101 is carried out in particular at predetermined time intervals. The time intervals are in particular less than one second.

In step 102 will be the shift of the step 101 at a display 21 of the captured image B2 (see 5 ), B3 (see 6 ) through a display device 20 (please refer 7 ) compensated. In particular, the shift according to step 101 through the display device 20 electronically compensated. In this case, the image B1 is preferably by means of the image detector 10 recorded at a first frequency f1. The captured image B2, B3 is displayed at a second frequency f2, where the first frequency f1 is greater than or equal to twice the second frequency f2 (f1 ≥ 2 · f2).

In particular, the steps become 101 and 102 synchronized with each other. Furthermore, it is possible that a frequency of an external vibration excitation is determined and a correction frequency, by means of which the steps 101 and 102 are performed, is adjusted depending on the determined frequency of the external vibration excitation. For example, if the image detector 10 is mounted on a vehicle, so the frequency of the external vibration excitation of the vehicle can be determined and the correction frequency for the steps 101 and 102 be adjusted depending on this.

This shows 4 a schematic view of an embodiment of a recessed image B1. For the sake of illustration, image B1 has only a single pixel P, which is black. All other pixels are white.

The 5 and 6 show the taken picture B1 of the 4 after a shift to the right by one pixel. Thus, the displacement path W corresponds to a pixel and the shift direction R is from left to right.

In the picture B2 the 5 For example, the pixel P is unchanged from the unblurred image B1 of FIG 4 , Although the 5 shows a shifted image B2, the location of the black spot is unchanged at the pixel P. Thus, the pixel P is in the 5 an interfering pixel S.

On the other hand, in the picture B3, the 6 the pixel P changes from the non-shifted image B1 4 , In the picture B3 of the 5 the black spot has moved one pixel to the right. The pixel P is in the image B3 of FIG 6 White. Consequently, the pixel P is in the 6 no noise.

The 4 to 6 show that a respective particular pixel P by a shift of the captured image with respect to the detector surface 11 can be detected as interference pixels S.

In 3 is a schematic flow diagram of a second embodiment of a method for processing of interference pixels S on a detector surface 11 of an image detector 10 shown. The second embodiment of the 3 is based on the first embodiment of 1 and includes the following process steps 301 - 303 ,

In step 301 becomes one by means of the image detector 10 taken image B1 with respect to the detector surface 11 (please refer 2 ) for detecting interference pixels S on the detector surface 11 postponed. In particular, the step corresponds 301 of the 3 the step 101 of the 1 , For these reasons, to avoid repetition on the description of the step 101 of the 1 Referenced.

In step 302 becomes a particular pixel P (see, for example 5 ) are detected as noise pixels S and declared as such if the particular pixel P has a signal mismatch with its neighboring pixels both before shifting and after shifting. How the comparison of 4 and 5 has the particular pixel P in the 5 both before moving ( 4 ) as well as after the move ( 5 ) a consistent signal mismatch with its neighboring pixels. In particular, the pixel P has eight adjacent pixels.

In contrast, the comparison shows the 4 and 6 that the particular pixel P before moving (see 4 ) and after moving (see 6 ) does not have an equal signal mismatch with its neighboring pixels. In other words, in the 4 is the pixel P black and in the 6 is the pixel P white. The black spot wandered in 6 due to the shift by one pixel to the right.

In step 303 will be the shift of the step 301 at a display 21 of the captured image B2, B3 by a display device 20 (please refer 7 ) compensated.

The step 303 may in particular include that when viewing 21 of the captured image B2, B3 by the display device 20 (please refer 7 ), a number of outer columns CB (Column Black) are respectively displayed in black to provide a buffer for a horizontal displacement path W of a number of pixels corresponding to the number of pixels. Accordingly, when viewing 21 also each a number of outer rows RB (Row Black) on both sides of the display 21 are displayed in black to provide a buffer for a vertical displacement path W of a number of pixels corresponding to the number of pixels. In the example of 7 Both the vertical buffer and the horizontal buffer correspond to two pixels. Consequently, in the examples of 7 in each case the two outer columns CB and the two outer rows RB are shown in black.

In 8th FIG. 3 is a schematic flow diagram of a first embodiment for determining a signal mismatch of a particular pixel P.

In step 801 An average of signal values of the pixels adjacent to the particular pixel P is calculated.

In step 802 a current signal value of the particular pixel P is calculated.

In step 803 If the determined current signal value of the particular pixel P is greater than a sum of the calculated mean value and a threshold value, the particular pixel P is declared as interfering pixel.

9 shows a second embodiment for determining the signal mismatch of the particular pixel P.

In step 901 a median of signal values of the pixels adjacent to the particular pixel P is calculated.

In step 902 a current signal value of the particular pixel P is determined.

In step 903 For example, if the determined current signal value of the particular pixel P is greater than a sum of the calculated median and a threshold value, the particular pixel P is declared as an interfering pixel.

Preferably, a signal value of a specific pixel P detected as a noise pixel S is replaced by the mean value or by the median of the pixels adjacent to the particular pixel P.

The threshold according to 9 as well as according to 8th in particular to a current noise environment of the image detector 10 be adjusted. The interfering pixels S are preferably managed using a blacklist. After the disappearance of a disturbance of a certain pixel P declared as a disturbance pixel S, this particular pixel P is again deregistered from the blacklist and can be reused as a ready-to-use pixel P for the overall image.

10 shows a schematic block diagram of an embodiment of a device 30 for processing interference pixels S on a detector surface 11 of an image detector 10 , An example of such an image detector 10 is in 2 shown.

The device 30 of the 10 includes a first unit 31 and a second unit 32 ,

The first unit 31 is set up by means of the image detector 10 taken image B1 with respect to the detector surface 11 for detecting interference pixels S on the detector surface 11 to move. Examples of the move are in the 5 and 6 explained.

The second unit 32 is set up to shift in an ad 21 of the captured image B2, B3 by a display device 20 to compensate.

11 shows a schematic block diagram of an embodiment of a missile 40 , The missile 40 is for example a guided missile. The guided missile 40 includes a thermal imaging camera 41 , The thermal imager 41 integrated a device 30 for processing interference pixels S, as related to 10 is explained.

Although the present invention has been described with reference to embodiments, it is variously modifiable.

LIST OF REFERENCE NUMBERS

10

 image detector

11

 detector surface

12

 Detector array

13

 detector element

20

 display

21

 display

30

 contraption

31

 first unit

32

 second unit

40

 missile

41

 Thermal camera

W

 displacement

R

 direction

P

 pixel

S

 Störpixel

CB

 black outer columns

RB

 black outer lines

101

 step

102

 step

103

 step

301

 step

302

 step

303

 step

801

 step

802

 step

803

 step

901

 step

902

 step

903

 step

Claims (15)

Method for processing interference pixels (S) on a detector surface ( 11 ) of an image detector ( 10 ), with the steps: a) shifting ( 101 ) one by means of the image detector ( 10 ) recorded image (B1) with respect to the detector surface ( 11 ) for detecting interference pixels (S) on the detector surface ( 11 ), and b) Compensating ( 102 ) the shift in a display ( 21 ) of the captured image (B2, B3) by a display device ( 20 ). Method according to claim 1, characterized in that the image detector ( 10 ) one on the detector surface ( 11 ) arranged detector array ( 12 ) with a plurality of detector elements ( 13 ) for providing pixels (P). Method according to Claim 2, characterized in that the step a) comprises: moving the detector array ( 12 ) by a predetermined displacement (W) in a predetermined direction (R). Method according to claim 3, characterized in that the detector array ( 12 ) is moved by means of piezo elements. A method according to claim 4, characterized in that for moving the detector array ( 12 ) each detector element ( 13 ) of the detector array ( 12 ) is assigned exactly one piezoelectric element. Method according to one of claims 2 to 5, characterized by detecting ( 302 ) of a particular pixel (P) as a clutter pixel (S) if the particular pixel (P) has a signal mismatch with its neighboring pixels both before being shifted and after being shifted. A method according to claim 6, characterized in that determining the signal mismatch of the particular pixel (P) comprises: - calculating ( 801 ) an average of signal values of the pixels adjacent to the particular pixel (P), - determining ( 802 ) of a current signal value of the particular pixel (P), and - setting ( 803 ) of the particular pixel (P) as a clutter pixel (S) when the detected current signal value of the particular pixel (P) is greater than a sum of the calculated average value and a threshold value. A method according to claim 6, characterized in that determining the signal mismatch of the particular pixel (P) comprises: - calculating ( 901 ) a median of signal values of the pixels adjacent to the particular pixel (P), - Determine ( 902 ) of a current signal value of the particular pixel (P), and - setting ( 903 ) of the particular pixel (P) as a clutter pixel (S) when the detected current signal value of the particular pixel (P) is greater than a sum of the calculated median and a threshold value. Method according to one of claims 1 to 8, characterized in that the step a) and the step b) are synchronized with each other. Method according to one of claims 1 to 9, characterized in that in the display ( 21 ) of the captured image (B2, B3) by the display device ( 20 ) each have a number of outer columns (CB) on both sides of the display ( 21 ) is displayed in black to provide a buffer for a horizontal displacement (W) of a number of pixels corresponding to the number of pixels. Method according to one of claims 1 to 10, characterized in that in the display ( 21 ) of the captured image (B2, B3) by the display device ( 20 ) each have a number of outer rows (RB) on both sides of the display ( 21 ) is displayed in black to provide a buffer for a vertical displacement path (W) of a number of pixels corresponding to the number of pixels. Method according to one of Claims 1 to 11, characterized by taking the image (B1) by means of the image detector ( 10 ) at a first frequency, and displaying the captured image (B2, B3) at a second frequency, the first frequency being greater than or equal to twice the second frequency. Computer program product, which causes the execution of a method according to one of claims 1 to 12 on a program-controlled device. Contraption ( 30 ) for processing interference pixels (S) on a detector surface ( 11 ) of an image detector ( 10 ), with: - a first unit ( 31 ) for moving a by means of the image detector ( 10 ) recorded image (B1) with respect to the detector surface ( 11 ) for detecting interference pixels (S) on the detector surface ( 11 ), and - a second unit ( 32 ) for compensating the shift in a display ( 21 ) of the captured image (B2, B3) by a display device ( 20 ). Missile, in particular guided missile, with a device ( 30 ) for processing interference pixels (S) on a detector surface ( 11 ) of an image detector ( 10 ) according to claim 14.

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