JPH04159876A - Picture movement detecting device - Google Patents

Abstract

PURPOSE:To improve the detection accuracy of picture movement vectors when the picture movement vectors are detected from video signals of an interlace system by correcting the detected errors of the picture movement vectors caused by the vertical deviation of picture elements between fields due to interlaces by means of a vertical interpolation circuit. CONSTITUTION:A vertical interpolation circuit 11 performs an interpolating process on input video signals of the current field between lines and outputs interpolated video signals as vertically-interpolated video signals. A representative point storage circuit 12 divides the vertically-interpolated video signals into plural areas and stores the signal corresponding to the representative point of each area. At the time of storing the corresponding signals, the circuit 12 outputs the signal of each representative point stored in the preceding field to a correlation calculation circuit 13. The circuit 13 calculates the correlation between the signal of each representative point of the preceding field from the circuit 12 and the signal of each area of the input video signals of the current field and detects picture movement vectors from the calculated results. Therefore, the detection accuracy of picture movement vectors can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION The present invention relates to an image motion detection device used for hand shake correction of an imaging device.

2. Description of the Related Art A conventional image motion detection device will be described with reference to FIG. In FIG. 6, 61 is a representative point that divides the input video signal of the current field into a plurality of regions, stores the signal corresponding to the representative point of each region as a representative point signal, and outputs the representative point signal of the previous field. A storage circuit 62 is a correlation calculation circuit 6 that performs correlation calculation between the representative point signal and the input video signal.
Reference numeral 3 denotes a motion vector detection circuit that detects an image motion vector from the calculation result of the correlation calculation circuit 62.

In the conventional image motion detection device configured as described above, when an interlaced input video signal is supplied, the image motion is determined by dividing the input video signal one field before into a plurality of regions, and dividing the input video signal one field before each of these regions. A representative point is set within a region, and a correlation calculation is performed between each representative point signal and the corresponding signal in each region of the current input video signal, and an image obtained in each region where the correlation calculation is performed. The image movement is determined by a method such as classifying the image motion vector information into vector information indicating the same direction, and using the direction and size indicated by the most vector information as the image motion vector for the entire screen. vector was detected.

FIG. 7 shows a filter circuit 7 at the input section in contrast to the configuration shown in FIG. 6.
4.

In order to extract image features from a video signal, it has been practiced for some time to pass the video signal through a filter with certain optimal characteristics to detect a more accurate image motion vector.

An example of the configuration of an image motion detection device equipped with this filter circuit is shown in FIG. 7, and will be explained below. In FIG. 7, 71 is a representative point storage circuit, 72 is a correlation calculation circuit, and 73 is a motion vector detection circuit. , these have the same functions as the conventional embodiment shown in FIG. 74 is a filter circuit, which is a circuit for extracting image features.

In this configuration example, the video signal is first transmitted to the filter circuit 7.
4, an arbitrary frequency component is extracted from the video signal according to the filter characteristics of this filter circuit 74, and is sent to the subsequent circuit system (representative point storage circuit 71, correlation calculation circuit 72, and motion vector detection circuit 73). It will be done. Representative point storage circuit 71, correlation calculation circuit 72, motion vector detection circuit 73
The processing is the same as that of the conventional image motion detection device shown in FIG. 6, so a description thereof will be omitted.

Problems to be Solved by the Invention However, the above configuration causes the following problems. This will be explained using FIG. 8. 8th
In the figure, the A field and B field are two fields that form one frame of video signal, m1 "m9tml' to m9" are the line numbers of each field, and n1 to n18 are the A field and B field. This is the scanning position when the images are superimposed and shown in non-interlaced form. At this time, it can be seen that a pixel shift in the vertical direction by D shown in FIG. 8 occurs in the scanning position between the A field and the B field. In other words, from this, when correlation calculation is performed between each representative point signal and the signals in each region of the input video signal corresponding to this, the vertical direction due to interlacing that occurs between fields as shown in Figure 8. Since the correlation calculation is performed with the pixel shift still present, it is inevitable that the value of the motion vector detected thereafter will contain the above-mentioned vertical error.

The present invention has been made to solve these conventional problems, and an object of the present invention is to provide an image motion detection device that improves the accuracy of image motion detection.

Means for Solving the Problems In order to achieve this object, the present invention performs interpolation processing between the lines of the input video signal for an interlaced input video signal to create an interpolation signal, and performs vertical interpolation on this input video signal. A vertical interpolation circuit outputs a video signal, and a vertical interpolation video signal from the vertical interpolation circuit or an input video signal of a field that is not vertically interpolated and passes through the vertical interpolation circuit is divided into a plurality of regions. , a representative point storage circuit that stores a signal corresponding to the representative point of each region as a representative point signal and outputs each representative point signal of the previous field;
Each representative point signal of the previous field from the representative point storage circuit and the corresponding vertically interpolated video signal of the current field from the vertical interpolation circuit or a video signal that has not been vertically interpolated without passing through the vertical interpolation circuit. The correlation calculation between the signals in each area of the input video signal of the field is performed, and the vertically interpolated video signal or one of the input video signal and the representative point signal on which the correlation calculation is performed is always interpolated between lines. This is an image motion detection device that includes a correlation calculation circuit that uses a correlation calculation circuit, and a motion vector detection circuit that detects an image motion vector from the calculation result obtained from the correlation calculation circuit.

Operation With this configuration, a motion vector detection circuit 15 detects an image motion vector from the calculation result obtained from step 3 between fields of the video signal, and a motion vector 15 corrects the image motion vector obtained from the motion vector detection circuit 14. This is a correction circuit.

The operation of the image motion detection device of this embodiment configured as described above will be described below.

The vertical interpolation circuit 11 performs interpolation processing on the input video signal of the current field between lines, and outputs it as a vertically interpolated video signal. The representative point storage circuit 12 is a vertical interpolation circuit 1.
The vertically interpolated video signal output from 1 is divided into a plurality of regions, and a signal corresponding to a representative point of each region is stored. At this time, this representative point storage circuit outputs each representative point signal stored in the previous field to the correlation calculation circuit 13. The correlation calculation circuit 13 performs a correlation calculation between each representative point signal of the previous field from the representative point storage circuit 12 and the input video signal of the current field in each region. Then, the motion vector detection circuit 14 detects an image motion vector from the calculation result obtained from the correlation calculation circuit 13. lastly,
Errors in detected values of image motion vectors caused by vertical pixel shifts due to motion vector complementary interlace can be corrected.

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

FIG. 1 shows a block diagram of an image motion detection device according to a first embodiment of the present invention. In Figure 1, 1
1 is a vertical interpolation circuit that performs interpolation processing on the input video signal of the current field in the interlace format between lines and outputs it as a vertical interpolation video signal; 12 is a vertical interpolation circuit output from the vertical interpolation circuit 11; The interpolated video signal is divided into a plurality of regions, the signal corresponding to the representative point of each region is stored as a representative point signal, and at this time, each representative point signal stored in the previous field is output to the correlation calculation circuit 13. 13 is a correlation calculation circuit that performs a correlation calculation between signals in each area between each representative point signal from the representative point storage circuit 12 and the corresponding input video signal; 14 is a correlation calculation circuit The image motion vector detected by the motion vector detection circuit 14 is corrected by the first correction circuit 15 . The correction by the motion vector correction circuit 15 will be explained using FIG. 8. In FIG. The vertical scanning position of the field is n2, which is ml' of the B field.
When the motion vector is detected by calculating the correlation between the representative point of the A field and the video signal of the B field, it is not necessary to correct the detected image motion vector. However, when creating an interpolated signal in the B field (for example, when creating an interpolated signal from m1' and m2'), the scanning position of the A field corresponding to this interpolated signal is n3, which is the same as m2 of the A field. When the motion vectors are detected by calculating the correlation between the representative points of the B field and the video signals of the A field at the same scanning position, the detected image motion vector needs to be corrected in the vertical direction by one line. The motion vector correction circuit 15 performs this correction.

As described above, according to this embodiment, the vertical interpolation circuit 11
This eliminates the vertical pixel position shift between fields of an interlaced video signal, and allows pixels to exist in corresponding positions between consecutive fields. It is possible to reduce errors in detected image motion vectors caused by pixel shifts and improve image motion vector detection accuracy.

FIG. 2 shows a block diagram of an image motion detection device according to a second embodiment of the present invention. In Figure 2, 2
The names and functions of the circuits 1 to 25 are the same as those of circuits 11 to 15 in the first embodiment.

The operation will be explained below.

The vertical interpolation circuit 21 performs interpolation processing on the input video signal of the current field between lines to create an interpolation signal, and outputs this as a vertical interpolation video signal.

The representative point storage circuit 22 divides the input video signal into a plurality of regions and stores a signal corresponding to the representative point of each region. At this time, the representative point storage circuit 22 outputs each representative point signal stored in the previous field to the correlation calculation circuit 23. The correlation calculation circuit 23 calculates the correlation between each representative point signal of the previous field from the representative point storage circuit 22 and the signals in each area of the input video signal of the current field that have undergone interpolation processing from the vertical interpolation circuit 21. conduct. Hereinafter, the processing in the motion vector detection circuit 24 and the motion vector correction circuit 25 will be omitted since they are the same as in the first embodiment.

In this embodiment configured as described above, as in the first embodiment, the error in the detected image motion vector caused by vertical pixel shift between fields due to interlacing is reduced, and the image motion vector is This has the effect of improving detection accuracy.

FIG. 3 shows a block diagram of an image motion detection device according to a third embodiment of the present invention. In Figure 3, 3
1 is a vertical interpolation circuit that performs interpolation processing on the input interlaced current field video signal between lines and outputs it as a vertically interpolated video signal; 32 is a vertical interpolation circuit output from the vertical interpolation circuit 31; The direction interpolated video signal is divided into a plurality of regions, the signal corresponding to the representative point of each region is stored as a representative point signal, and at this time, each representative point signal stored in the previous field is sent to the correlation calculation circuit 33. Representative point memory circuit to output. 33 is a correlation calculation circuit that performs a correlation calculation between each representative point signal from the representative point storage circuit 32 and the signals in each region of the input video signal corresponding thereto; 34 is a calculation result obtained from the correlation calculation circuit 33; 35 is a representative point memory output control circuit that controls the representative point memory circuit 32 based on field information and changes the positional relationship between the representative point and each region of the video signal corresponding thereto. It is.

The operation of the image motion detection device of this embodiment configured as described above will be described below.

The vertical interpolation circuit 31 performs interpolation processing on the input video signal of the current field between lines to create an interpolation signal, and outputs this as a vertical interpolation video signal.

The representative point storage circuit 32 divides the vertical interpolation video signal output from the vertical interpolation circuit 31 into a plurality of regions, and stores a signal corresponding to the representative point of each region. At this time, the representative point storage circuit 32 outputs each representative point signal stored in the previous field to the correlation calculation circuit 33 under the control of the representative point storage output control circuit 35. To explain the function of this representative point storage output control circuit 35, as described in the first embodiment, in the image motion detection device having the configuration as shown in FIG. The circuit 15 performs correction for one line. However, in this embodiment, the need for such correction is eliminated by adding the representative point storage output control circuit 35. The correction by the representative point storage output control circuit 35 will be explained using FIG. 8. In FIG. The corresponding vertical scanning position of the B field is n2, which is ml of the B field
The scanning position is the same as that of ', and the representative point of field A and B
When detecting a motion vector by performing a correlation calculation between video signals of a field, it is not necessary to correct the detected image motion vector. However, when creating an interpolated signal in the B field (for example, when creating an interpolated signal from nnl' and m2'), the scanning position of the A field corresponding to this interpolated signal is n3, which is the same as m2 of the A field. The scanning positions will be the same, but a deviation of one line will occur. In order to eliminate this deviation, when performing correlation calculation between the representative point of the B field and the video signal of the A field, the representative point storage circuit 32 is set so that the correlation calculation start line of the A field is rrn2 instead of ml. The representative point storage output control circuit 35 controls the output timing of point signals, and thereby the motion vector correction circuit 1 performs one line correction of the detected motion vector, which was necessary in the first embodiment.
5 becomes unnecessary.

As described above, according to this embodiment, the vertical interpolation circuit 31
and the representative point storage output control circuit 35, it is possible to eliminate the vertical pixel position shift between fields of an interlaced video signal, and to make pixels exist at corresponding positions between consecutive fields. It is possible to reduce errors in detected image motion vectors caused by vertical pixel shifts between fields due to interlacing and improve image motion vector detection accuracy without using a motion vector correction circuit. It is.

Although the third embodiment has been described based on the configuration of the first embodiment, it is clear that similar effects can be obtained even when the second embodiment is used.

FIG. 4 shows a block diagram of an image motion detection device according to a fourth embodiment of the present invention. In Figure 4, 4
1 is a vertical interpolation circuit that performs interpolation processing on the input video signal of the current field between lines to create an interpolation signal, and outputs this as a vertically interpolated video signal. 42 is a field specifying whether the video signal to be sent to the subsequent circuit system is a vertically interpolated video signal output from the vertical interpolation circuit 41 or a video signal that is not subjected to interpolation processing by the vertical interpolation circuit 41. A signal selection circuit 43 that selects based on information divides the output video signal of the signal selection circuit 42 into a plurality of regions, stores a signal corresponding to a representative point of each region, and at this time,
A representative point memory circuit that outputs each representative point signal stored in the previous field.

Reference numeral 44 denotes a correlation calculation circuit that performs a correlation calculation between each representative point signal of the previous field from the representative point storage circuit 43 and the signals in each region of the video signal of the current field selected by the signal selection circuit 42. A motion vector detection circuit 45 detects an image motion vector from the calculation result obtained from the correlation calculation circuit 44.

The following is the first operation. Second. The explanation will focus on the differences from the third embodiment.

The vertical interpolation circuit 41 performs interpolation processing on the input video signal of the current field between lines to create an interpolation signal, and outputs this as a vertical interpolation video signal.

The signal selection circuit 42 selects the vertically interpolated video signal output from the vertical interpolation circuit 41 and the input video signal based on field information. The representative point storage circuit 43 divides the output video signal of the signal selection circuit 42 into a plurality of regions, and stores the signal corresponding to the representative point of each region. At this time, the representative point storage circuit 43 outputs each representative point signal stored in the previous field to the correlation calculation circuit 44. The correlation calculation circuit 44 performs correlation calculation between each representative point signal of the previous field from the representative point storage circuit 43 and the signals in each region of the video signal of the current field. Then, the motion vector detection circuit 45 detects an image motion vector from the calculation result obtained from the correlation calculation circuit 44.

In this embodiment, by providing the signal selection circuit 42, the above-mentioned first. The motion vector correction circuits 15 and 25 required in the second embodiment become unnecessary, and the representative point storage output control circuit 35 required in the third embodiment becomes unnecessary. The reason for this will be explained using FIG. 8. Assuming that the field of the current input video signal is the A field and the signal selection circuit 42 selects the interpolated video signal from the vertical interpolation circuit 41, Since the output signal of the signal selection circuit 42 in the previous field is a signal that has not undergone vertical interpolation processing, each representative point signal created from the video signal of the previous field subjected to correlation calculation in the correlation calculation circuit 44 and the current field There is no vertical pixel position shift in the video signal, even though the fields are different. Next, similarly, assuming that the field of the current input video signal is the B field and the signal selection circuit 42 selects a video signal that has not passed through the vertical interpolation circuit 41, the output of the signal selection circuit 42 in the previous field Is the signal subject to vertical interpolation? -Also, since they are signals, each representative point signal created from the video signal of the previous field and the video signal of the current field, which are correlated in the correlation calculation circuit 44, are also of different pixels in the vertical direction, even though they are different fields. There is no shift in position.

As described above, according to this embodiment, the vertical interpolation circuit 41
and the signal selection circuit 42 can eliminate vertical pixel positional deviation between fields of an interlaced video signal, allowing pixels to exist at corresponding positions between successive fields. Without using the motion vector correction circuit 15.25 that was necessary in the second embodiment, errors in detected image motion vectors caused by vertical pixel shifts between fields due to interlacing can be reduced. It is possible to improve the accuracy of motion vector detection. Furthermore, the representative point storage output control circuit 35, which was necessary in the third embodiment, becomes unnecessary.

FIG. 5 shows a block diagram of an image motion detection device according to a fifth embodiment of the present invention. In Figure 5,
The names and functions of the circuits 51 to 55 are the same as those of the circuits 4j to 45 of the fourth embodiment. 56 and 57 are filter circuits that extract image features from the video signal, and 58 is a filter selection circuit that switches inputs from the filter circuits 56 and 57 based on field information.

The operation will be explained below, focusing on the differences from the fourth embodiment. This embodiment corresponds to the conventional example shown in FIG.

When a vertical interpolation circuit that performs interpolation processing of video signals as in the first to fourth embodiments is added to an image motion detection device that has a filter circuit for extracting features from video signals, this interpolation Because the processing has the effect of a kind of low-pass filter, the overall filter effect on the video signal when viewed by the image motion detection device Fffi as a whole is different from the case where conventional interpolation processing is not involved, and the filter effect is degraded. Resulting in. In order to correct this deterioration of the filter effect, a filter circuit 57 and a filter selection circuit 58 are provided to correct the deterioration of the overall filter effect when performing interpolation calculation processing.

The filter selection circuit 58 operates in conjunction with the signal selection circuit 52, and when the signal selection circuit 52 selects a video signal that has not passed through the vertical interpolation circuit 51, the filter selection circuit 58 operates in conjunction with the signal selection circuit 52.
conversely, when the signal selection circuit 52 selects the video signal that has passed through the vertical interpolation circuit 51, the filter selection circuit 58 selects the filter circuit 57. As a result, the filter characteristics for the video signal sent to the circuit system after the representative point storage circuit 53 can be made uniform throughout.
Optimal effects can be obtained (that is, the filter characteristics are that the characteristics of the filter circuit 56 = the characteristics of the vertical interpolation circuit 51 in the characteristics of the filter circuit 57)
. Other vertical interpolation circuits 51, signal selection circuits 52,
The processing in the representative point storage circuit 53, the correlation calculation circuit 54, and the motion vector detection circuit S5 is the same as that in the fourth embodiment described above, and will therefore be omitted.

As described above, according to the present embodiment, in order to detect a more accurate image motion vector, an image motion detection device having a filter circuit with a certain optimum characteristic is provided with a vertical direction between fields of a video signal due to interlacing. Even when a vertical interpolation circuit is added to correct errors in image motion vectors caused by pixel misalignment, a filter effect with optimal characteristics can be obtained in both fields by providing a separate filter circuit. It is possible to realize a circuit configuration that can do this.

Although the filter circuit 56 and the filter circuit 57 are described here as being divided into two circuits, it is clear that there is no need to divide them into two, and that the parts that can be shared may be shared and made into one filter circuit. It is.

Further, although the filter selection circuit 58 is described here as an independent circuit, it is not necessary to make it independent, and it is obvious that it can be built into the filter circuits 56 and 57.

Further, in this embodiment, the filter circuit is provided before the image motion detection circuit, but the present invention is not limited to this. For example, a filter circuit 57 is placed between the vertical interpolation circuit 51 and the signal selection circuit 52, and a filter circuit 56 is placed on the path from the video signal input to the signal selection circuit 52 without passing through the vertical interpolation circuit 51. It is also possible that the filter selection circuit 58 and the signal selection circuit 52 can be used in common.

Further, although this embodiment shows a configuration example in which a filter circuit is added to the fourth embodiment, the above-mentioned first embodiment. It is clear that even when a filter circuit is added to the second and third embodiments, the addition of the filter circuit as in this embodiment is useful.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, when detecting an image motion vector for an interlaced video signal, the detected image that occurs due to vertical pixel shift between fields due to interlacing. It is possible to correct errors in motion vectors using a vertical interpolation circuit, thereby improving the accuracy of detecting image motion vectors.

Also, at this time, when interpolation processing of a video signal is added to a conventional image motion detection device equipped with a filter circuit that extracts image features from a video signal, interpolation calculation processing of the video signal may or may not be performed. In this case, it is possible to eliminate differences in overall effects due to filters, and to further improve image motion vector detection accuracy.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an image motion detection device according to the first embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of the image motion detection device according to the second embodiment of the present invention, and FIG. The figure is a block diagram showing the configuration of an image motion detection device according to a third embodiment of the present invention, FIG. 4 is a block diagram showing the configuration of an image motion detection device according to a fourth embodiment of the present invention, and FIG. A block diagram showing the configuration of an image motion detection device according to a fifth embodiment of the present invention, FIG. 6 is a block diagram showing the configuration of a conventional image motion detection device, and FIG. 7 is a block diagram showing the configuration of a conventional image motion detection device. FIG. 8 is a block diagram showing the configuration of a conventional image motion detection device, and is an explanatory diagram for explaining an interlaced video signal. IL 2j,, 31, 41.51... Vertical interpolation circuit, 12.22, 32, 43.53... Representative point storage circuit, 13.23, 33, 44.54... Correlation calculation circuit, 14, 24, 34, 45.55...
Motion vector detection circuit, 15.25...Motion vector correction circuit, 35...Representative point storage output control circuit, 42.52...Signal selection circuit, 56.57...
- Filter circuit, 58... Filter selection circuit.

Claims (5)

[Claims] (1) A vertical interpolation circuit that performs interpolation processing between lines of an interlaced input video signal to create an interpolation signal and outputs this as a vertically interpolated video signal; A representative point storage circuit that divides the field into regions, stores the signal corresponding to the representative point of each region as a representative point signal, and outputs each representative point signal of the previous field, and a correlation circuit that performs a correlation calculation between two input signals. and a motion vector detection circuit that detects an image motion vector from the calculation result obtained from the correlation calculation circuit, and the video signal processed by the representative point storage circuit is processed by the vertical interpolation circuit. the vertically interpolated video signal or the video signal of a field that has not been vertically interpolated without passing through the vertical interpolation circuit, and one of the two input signals subjected to correlation calculation in the correlation calculation circuit is or a current field video signal that has not been vertically interpolated without passing through a vertical interpolation circuit, and the other is a video signal of the current field that has not been vertically interpolated without passing through a vertical interpolation circuit, and the other is a video signal of each representative point of the previous field output from the representative point storage circuit. Image motion detection device that uses signals. (2) a vertical interpolation circuit that performs interpolation processing between lines of an interlaced input video signal to create an interpolation signal and outputs this as a vertically interpolated video signal; and the vertical interpolation circuit. a representative point storage circuit that divides a vertically interpolated video signal from the circuit into a plurality of regions, stores a signal corresponding to a representative point of each region as a representative point signal, and outputs each representative point signal of the previous field; a correlation calculation circuit that performs a correlation calculation between each representative point signal of the previous field from the representative point storage circuit and the corresponding signal in each region of the input video signal of the current field; An image motion detection device comprising: a motion vector detection circuit that detects an image motion vector from the obtained calculation result; and a motion vector correction circuit that corrects the image motion vector obtained from the motion vector detection circuit. (3) a vertical interpolation circuit that performs interpolation processing between lines of an interlaced input video signal to create an interpolation signal and outputs this as a vertically interpolated video signal; and the input video signal a representative point storage circuit that divides the field into a plurality of regions, stores a signal corresponding to the representative point of each region as a representative point signal, and outputs each representative point signal of the previous field; a correlation calculation circuit that performs a correlation calculation between each representative point signal of a field and a corresponding signal in each region of the vertically interpolated video signal of the current field from the vertical interpolation circuit; An image motion detection device comprising: a motion vector detection circuit that detects an image motion vector from the obtained calculation result; and a motion vector correction circuit that corrects the image motion vector obtained from the motion vector detection circuit. (4) a vertical interpolation circuit that performs interpolation processing between lines of an interlaced input video signal to create an interpolation signal and outputs this as a vertically interpolated video signal; and the vertical interpolation circuit. a signal selection circuit that selects a video signal and the input video signal based on field information; and a signal selection circuit that divides the output signal from the signal selection circuit into a plurality of regions, and stores a signal corresponding to a representative point of each region as a representative point signal. and a representative point storage circuit that outputs each representative point signal of the previous field; and each representative point signal of the previous field from the representative point storage circuit and the corresponding video signal of the current field from the signal selection circuit. an image motion vector comprising: a correlation calculation circuit that performs a correlation calculation between signals in each region; and a motion vector detection circuit that detects an image motion vector from the calculation result obtained from the correlation calculation circuit. Detection device. (5) Accompanying the image motion detection device, a plurality of filter circuits that extract image features from an input video signal, a filter selection circuit that selects characteristics of the plurality of filter circuits, and an interlaced video image. a vertical interpolation circuit that performs interpolation processing between lines of the video signal on the signal to create an interpolation signal and outputs the interpolated signal as a vertically interpolated video signal, and selects the vertically interpolated video signal and the video signal. a signal selection circuit, at least one of the plurality of filter circuits has a characteristic obtained by multiplying its own filter characteristic by the filter characteristic of the vertical interpolation circuit among the plurality of filter circuits. , equal to the filter characteristic of at least one other filter circuit, and both the filter selection circuit and the signal selection circuit are controlled substantially simultaneously by field information.
or 4. The image motion detection device according to 4.