JP2689716B2 - Image motion detector - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image motion detection device used for image stabilization 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, reference numeral 61 is a representative point that divides the input video signal of the current field into a plurality of areas, stores the signal corresponding to the representative point of each area as a representative point signal, and outputs the representative point signal of the previous field. A storage circuit, 62 is a correlation calculation circuit for performing a correlation calculation between the representative point signal and the input video signal, and 63 is a motion vector detection circuit for detecting an image motion vector from the calculation result in the correlation calculation circuit 62.

In the conventional image motion detection device configured as described above, when the interlaced input video signal is supplied, the motion of the image is divided into a plurality of regions from the input video signal of one field before, An image obtained in each area where a representative point is set in the area, the correlation operation is performed between each representative point signal and the signal in each area of the corresponding current input video signal, and the correlation operation is performed. Among the motion vector information, the image motion vector information is classified for each vector information indicating the same direction, and the direction and size indicated by the most vector information are used as the image motion vector for the entire screen. The vector was detected.

FIG. 7 shows the configuration of FIG. 6 with a filter circuit in the input section.
It has a structure provided with 74.

In order to extract image features from a video signal, it has long been practiced to pass the video signal through a filter having certain optimum characteristics to detect a more accurate image motion vector. FIG. 7 shows an example of the configuration of an image motion detecting device equipped with this filter circuit. In the following description, 71 in FIG. 7 is a representative point storage circuit, 72 is a correlation calculation circuit, and 73 is a motion vector detection circuit. Each of these has the same function 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 sent to the filter circuit 74, an arbitrary frequency component is extracted from the video signal according to the filter characteristic of the filter circuit 74, and the subsequent circuit system (representative point storage circuit 71, correlation It is sent to the arithmetic circuit 72 and the motion vector detection circuit 73). The processing by the representative point storage circuit 71, the correlation calculation circuit 72, and the motion vector detection circuit 73 is the same as that of the conventional image motion detection device shown in FIG.

[Problems to be Solved by the Invention] However, the above-mentioned configuration causes the following problems. This will be described with reference to FIG. In FIG. 8, A fields and B fields are two fields forming a video signal of one frame by these two fields, m1 to m9, m1 'to m9' are line numbers of each field, and n1 to n18 are A fields. This is a scanning position when B fields are overlapped and shown in a non-interlaced form. At this time, it can be seen that there is a vertical pixel shift by D shown in FIG. 8 between the A field and the B field at the scanning position. That is, from this, when the correlation calculation is performed between each representative point signal and the signal in each area of the corresponding input video signal, the vertical direction due to the interlace generated between the fields as shown in FIG. Since the correlation calculation is performed with the pixel shift, it is inevitable that the value of the motion vector detected thereafter includes the above-mentioned error in the vertical direction.

The present invention has solved such conventional problems,
An object of the present invention is to provide an image motion detection device capable of accurately performing motion detection even in an interlaced video signal by performing alignment between lines of consecutive fields by performing interpolation processing on the video signal in the vertical direction. And

Means for Solving the Problems In order to achieve this object, the present invention performs an interpolation process in a vertical direction on an input video signal of an interlace system in order to align the positions of scanning lines between consecutive field images, A vertical direction interpolation circuit that outputs the vertically interpolated video signal as a vertical direction interpolation video signal, and the vertical direction interpolation video signal from the vertical direction interpolation circuit is divided into a plurality of areas, and a representative point of each area A representative point memory circuit which stores a signal corresponding to the representative point signal as a representative point signal and outputs each representative point signal of the previous field, each representative point signal of the preceding field from the representative point memory circuit and the corresponding current point signal. A correlation calculation circuit that performs a correlation calculation between signals in each area of the input video signal of the field, and a motion that detects an image motion vector from the calculation result obtained from the correlation calculation circuit. And a motion vector correction circuit that corrects a detection error included in the image motion vector obtained from the motion vector detection circuit based on field information for discriminating odd / even fields. Is.

Further, according to the present invention, an interlaced input video signal is subjected to vertical interpolation processing in order to align the positions of scanning lines between consecutive field images, and the video signal interpolated in the vertical direction is processed in the vertical direction. A vertical direction interpolation circuit for outputting as an interpolated video signal, the input video signal is divided into a plurality of areas, a signal corresponding to a representative point of each area is stored as a representative point signal, and each representative point signal of the previous field is stored. Between the representative point storage circuit for outputting, each representative point signal of the previous field from the representative point storage circuit, and the corresponding signal in each area of the vertical direction interpolation video signal of the current field from the vertical direction interpolation circuit corresponding thereto Correlation calculation circuit for performing the correlation calculation of the motion vector, a motion vector detection circuit for detecting an image motion vector from the calculation result obtained from the correlation calculation circuit, and the motion vector detection circuit. A detection error included in the image motion vectors obtained from an image motion detecting apparatus and a motion vector correction circuit for correcting, based on the field information to determine odd and even fields.

Further, according to the present invention, an interlaced input video signal is subjected to vertical interpolation processing in order to align the positions of scanning lines between consecutive field images, and the video signal interpolated in the vertical direction is processed in the vertical direction. A vertical direction interpolation circuit for outputting as an interpolated video signal, a signal selection circuit for selecting the vertical direction interpolated video signal and the input video signal based on field information for discriminating odd / even fields, and output from the signal selection circuit Split the signal into multiple regions,
A representative point storage circuit that stores a signal corresponding to the representative point of each area as a representative point signal and outputs each representative point signal of the previous field, and each representative point signal of the previous field from the representative point storage circuit A correlation calculation circuit for performing a correlation calculation between signals in the respective regions of the output signal of the signal selection circuit, and a motion vector detection circuit for detecting an image motion vector from the calculation result obtained from the correlation calculation circuit. An image motion detection device having the following.

Further, according to the present invention, a plurality of filter circuits for extracting image characteristics from an input video signal and outputs of the plurality of filter circuits are attached to an image motion detection device, and field information for discriminating odd / even fields is used. The interpolated input video signal and the filter selection circuit selected by are subjected to vertical interpolation processing to align the scanning lines between consecutive field images, and the video signal interpolated in the vertical direction. A vertical direction interpolating circuit for outputting as a vertical direction interpolating video signal, a signal selecting circuit for selecting the vertical interpolating video signal and the input video signal based on field information for discriminating odd / even fields, and the signal selecting circuit. The output signal of is divided into a plurality of areas, the signal corresponding to the representative point of each area is stored as a representative point signal,
And a representative point storage circuit that outputs each representative point signal of the previous field, each representative point signal of the previous field from the representative point storage circuit, and a signal in each of the areas of the output signal of the signal selection circuit corresponding thereto And a motion vector detection circuit that detects an image motion vector from a calculation result obtained from the correlation calculation circuit. At least one filter of the plurality of filter circuits is provided. The circuit has a characteristic obtained by multiplying its own filter characteristic and the filter characteristic of the vertical direction interpolation circuit substantially equal to at least one other filter characteristic of the plurality of filter circuits, and the filter selection circuit and the signal selection circuit. Both are image motion detecting devices which are controlled substantially simultaneously by the field information.

Operation With this configuration, it is possible to correct the error in the detected value of the image motion vector caused by the vertical pixel shift due to interlacing between fields of the video signal.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an image motion detecting device according to the first embodiment of the present invention. In FIG.
11 is an input video signal of the current field of the interlaced system that is interpolated between the lines so that the vertical positions of the lines are aligned in successive fields, and this is output as a vertical interpolation video signal. A vertical direction interpolation circuit, 12 divides the vertical direction interpolation video signal output from the vertical direction interpolation circuit 11 into a plurality of areas, stores a signal corresponding to a representative point of each area as a representative point signal, and at this time, A representative point memory circuit that outputs each representative point signal stored in the previous field to the correlation calculation circuit 13, 13 is a representative point memory circuit
Correlation calculation circuit that performs correlation calculation between signals in each area of each representative point signal from 12 and the corresponding input video signal,
Reference numeral 14 is a motion vector detection circuit that detects an image motion vector from the calculation result obtained from the correlation calculation circuit 13, and reference numeral 15 is a motion vector correction circuit that corrects the image motion vector obtained from the motion vector detection circuit 14.

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

The vertical direction interpolation circuit 11 interpolates the input video signal of the current field between lines and outputs it as a vertical direction interpolation video signal. The representative point storage circuit 12 divides the vertical direction interpolation video signal output from the vertical direction interpolation circuit 11 into a plurality of areas, and stores a signal corresponding to the representative point of each area. At this time, the 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 the correlation calculation between the signals in each area of the representative point signal of the previous field from the representative point storage circuit 12 and the input video signal of the current field. Then, the motion vector detection circuit 14 detects the image motion vector from the calculation result obtained from the correlation calculation circuit 13. Finally, the motion vector correction circuit 15 corrects the image motion vector detected by the motion vector detection circuit 14. The correction by the motion vector correction circuit 15 will be described with reference to FIG.
At the time of motion detection, the representative point signal output from the representative point storage circuit 12 to the correlation calculating circuit 13 is the representative point signal extracted from the image obtained by vertically interpolating the image of the A field in FIG. If the video signal supplied to the circuit 13 is the image of the B field in the figure, a vertical interpolation video signal is created so that each video line of the image of the A field matches the line position of the B field by interpolation processing. In that case, the line positions are the scanning positions n2, n4, n6, ...
.., and the B field image lines m1 ', m2', m
Matches 3 '... Further, since the spatial position of the vertically interpolated video signal of the A field and the image of the B field completely match, the motion vector of the image can be accurately detected by the correlation calculation between the representative point of the A field and the video signal of the B field. This is possible, and it is not necessary to correct the detected motion vector by the motion vector correction circuit 15.

However, conversely, the representative point signal output from the representative point storage circuit 12 to the correlation calculating circuit 13 is the representative point signal extracted from the image obtained by vertically interpolating the image of the B field in FIG. If the video signal supplied to 13 is the image of the A field in the figure, there is no video line above the video line m1 'in the image of the B field, so the video line obtained from the B field by interpolation processing. Must be a video line located below the scanning position n2. Therefore, the line positions of the vertically interpolated video signal after alignment by the vertical interpolation processing are the scanning positions n3, n5, n7, ... In the figure, and the A field line positions m2, m3, m4 ,. The line positions (n3, n5, n7, ...) Of the vertically interpolated video signal match, but the first line of the image of the A field is m1, whereas the first line of the vertically interpolated video signal of the B field is Since n is at the position of n3, there is a spatial positional deviation of exactly one line in the vertical direction between the image of the A field and the vertically interpolated video signal of the B field. Without performing the motion detection by performing the correlation calculation between the representative point of the B field and the video signal of the A field, the space of just one line in the vertical direction is obtained in addition to the motion of the image caused by the motion of the imaging device. Misalignment The amounts will be detected together as the movement of the image.

This detected amount of positional deviation for one line (detection error)
The motion vector correction circuit 15 is a means for correcting the error, and this detection error occurs every other field as described above. Therefore, the motion vector correction circuit 15 uses the field information for discriminating even and odd fields to The detection error included in the motion vector is corrected every field.

As described above, according to this embodiment, the vertical direction interpolation circuit 11
This eliminates vertical pixel misalignment between fields of interlaced video signals, and allows pixels to exist at corresponding positions between consecutive fields. This allows interlaced vertical direction between fields. It is possible to reduce the error of the detected pixel motion vector caused by the pixel shift of, and improve the detection accuracy of the image motion vector.

FIG. 2 is a block diagram of an image motion detecting device according to the second embodiment of the present invention. In FIG.
The names and functions of the circuits 21 to 25 are the same as those of the first embodiment.
It is the same as 11 to 15, respectively.

 The operation will be described below.

The vertical direction interpolation circuit 21 interpolates the input video signal of the current field between lines to generate an interpolation signal, and outputs this as a vertical direction interpolation video signal. The representative point storage circuit 22 divides the input video signal into a plurality of areas and stores the signals corresponding to the representative points of each area. 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 signal in each area of the input video signal of the current field subjected to the interpolation processing from the vertical direction interpolation circuit 21. To do.
The processes in the motion vector detecting circuit 24 and the motion vector correcting circuit 25 are the same as those in the first embodiment described above, and the description thereof will be omitted.

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

FIG. 3 is a block diagram of an image motion detecting device according to the third embodiment of the present invention. In FIG.
31 is a vertical interpolation circuit that interpolates the input interlaced video signal of the current field between lines and outputs it as a vertical interpolation video signal; 32 is a vertical interpolation circuit output from the vertical interpolation circuit 31 The direction interpolation video signal is divided into a plurality of areas, the signal corresponding to the representative point of each area is stored as a representative point signal, and each representative point signal stored in the previous field at this time is stored in the correlation calculation circuit 33. Representative point memory circuit to output. Reference numeral 33 is a correlation calculation circuit for performing a correlation calculation between each representative point signal from the representative point storage circuit 32 and a signal in each area of the input video signal corresponding to the representative point signal, and 34 is a correlation calculation circuit.
A motion vector detection circuit that detects an image motion vector from the calculation result obtained from 33, 35 controls the representative point storage circuit 32 according to field information, and changes the positional relationship between the representative point and each area of the video signal corresponding to it. This is a representative point storage output control circuit.

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

The vertical direction interpolation circuit 31 interpolates the input video signal of the current field between lines to generate an interpolation signal, and outputs this as a vertical direction interpolation video signal. The representative point storage circuit 32 divides the vertical direction interpolation video signal output from the vertical direction interpolation circuit 31 into a plurality of areas, and stores a signal corresponding to the representative point of each area. And at this time, this representative point memory 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. The operation of the representative point storage output control circuit 35 will be described. As described in the first embodiment, in the image motion detecting apparatus having the configuration shown in FIG. 1, the motion vector correction is performed for the interpolation processing of the video signal. The circuit 15 corrected one line. However, in the present embodiment, the need for 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 described with reference to FIG. 8. When an interpolation signal is created in the A field in FIG. 8 (for example, when an interpolation signal is created from m1 and m2), it corresponds to this interpolation signal. The vertical scanning position of the B field is n2, which is the same scanning position as the m1 'of the B field. When the correlation calculation between the representative point of the A field and the video signal of the B field is performed to detect the motion vector, No correction of the detected image motion vector is required. However, conversely, when an interpolation signal is created in the B field (for example, when an interpolation signal is created from m1 'and m2'), the scanning position of the A field corresponding to this interpolation signal is n3, which is m2 of the A field. The scanning positions are the same, and a shift of one line occurs. In order to eliminate this shift, when performing the correlation calculation between the representative point of the B field and the video signal of the A field, the representative point storage circuit is set so that the correlation calculation start line of the A field is not m1 but m2.
The representative point storage output control circuit 35 controls the output timing of the representative point signal from 32, and the motion vector for correcting one line of the detected motion vector required by the first embodiment. The correction circuit 15 becomes unnecessary.

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

Although the third embodiment has been described based on the configuration of the first embodiment, it is obvious that the same effect can be obtained based on the second embodiment.

FIG. 4 is a block diagram of an image motion detecting device according to the fourth embodiment of the present invention. In FIG.
Reference numeral 41 is a vertical interpolation circuit that interpolates the input video signal of the current field between lines to create an interpolation signal and outputs this as a vertical interpolation video signal. Reference numeral 42 designates a video signal to be sent to the subsequent circuit system as a vertical interpolation video signal which is an output from the vertical interpolation circuit 41, or a vertical interpolation circuit 41.
Signal selection circuit for selecting whether to use a video signal that is not subjected to the interpolation processing in step 4 by field information, and 43 is a signal selection circuit 42
The representative point storage circuit that divides the output video signal of 1) into a plurality of areas, stores the signals corresponding to the representative points of each area, and outputs the representative point signals stored in the previous field at this time. Reference numeral 44 is a correlation calculation circuit for performing a correlation calculation between each representative point signal of the previous field from the representative point storage circuit 43 and a signal in each area of the video signal of the current field selected by the signal selection circuit 42. Reference numeral 45 is a motion vector detection circuit that detects an image motion vector from the calculation result obtained from the correlation calculation circuit 44.

The operation will be described below focusing on the points different from those of the first, second and third embodiments.

The vertical direction interpolation circuit 41 interpolates the input video signal of the current field between lines to create an interpolation signal, and outputs this as a vertical direction interpolation video signal. The signal selection circuit 42 selects the vertical interpolation video signal output from the vertical interpolation circuit 41 and the input video signal according to the field information.
The representative point storage circuit 43 divides the output video signal of the signal selection circuit 42 into a plurality of areas and stores a signal corresponding to the representative point of each area. At this time, the representative point storage circuit 43 uses the representative point signals stored in the previous field to calculate the correlation calculation circuit.
Output to 44. The correlation calculation circuit 44 performs a correlation calculation between each representative point signal of the previous field from the representative point storage circuit 43 and the signal in each area of the video signal of the current field. Then, the motion vector detection circuit 45 detects the 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 motion vector correction circuits 15 and 25 required in the first and second embodiments described above are not necessary, and are required in the third embodiment. The representative point storage output control circuit 35, which has been described above, becomes unnecessary. Explaining the reason for this with reference to 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 direction interpolation circuit 41. Since the output signal of the signal selection circuit 42 in the previous field is a signal which has not been subjected to the vertical direction interpolation processing, each representative point signal and the current field generated from the video signal of the previous field which is subjected to correlation calculation in the correlation calculation circuit 44. The video signal of (1) has no vertical pixel position displacement despite the difference in field. 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 which has not passed through the vertical direction interpolation circuit 41, the output of the signal selection circuit 42 in the previous field. Since the signal is a signal that has been subjected to vertical direction interpolation processing, the representative point signal made from the video signal of the previous field and the video signal of the current field that are subjected to correlation calculation by the correlation calculation circuit 44 are also different in field. Regardless, there is no vertical pixel position shift.

As described above, according to this embodiment, the vertical direction interpolation circuit 41
And the signal selection circuit 42 eliminates the vertical pixel position shift between the fields of the interlaced video signal,
Pixels can be made to exist at corresponding positions between consecutive fields, and the vertical direction between fields by interlacing can be achieved without using the motion vector correction circuits 15 and 25 required in the first and second embodiments. Reduce the error in the detected image motion vector due to the pixel shift of
It is possible to improve the detection accuracy of the image motion vector. Further, the representative point storage output control circuit 35, which is required in the third embodiment, is also unnecessary.

FIG. 5 is a block diagram of an image motion detecting device according to the fifth embodiment of the present invention. In FIG. 5, the names and functions of the circuits 51 to 55 are the same as those of the fourth embodiment.
It is the same as 41 to 45 respectively. 56 and 57 are filter circuits for extracting image features from video signals, and 58 is a filter circuit 5
It is a filter selection circuit that switches the input from 6,57 according to the field information.

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

When a vertical direction interpolating circuit for interpolating a video signal as in the first to fourth embodiments is added to an image motion detecting device having a filter circuit for extracting a feature from a video signal, this interpolation is performed. Since the processing has the effect of a kind of low-pass filter, the overall filter effect given to the video signal when looking at the entire image motion detection device is different from that without conventional interpolation processing, and the filter effect deteriorates. Will end up.
To correct this deterioration of the filter effect, a filter circuit
57 and a filter circuit 58 are provided to correct the deterioration of the overall filter effect when performing the interpolation calculation process. 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 selects the filter circuit 56 and When the signal selection circuit 52 selects the video signal that has passed through the vertical direction 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 are made equal to each other and the optimum effect can be obtained (that is, the filter characteristic is the characteristic of the filter circuit 56 = the filter circuit 57). That is the characteristic of + the characteristic of the vertical direction interpolation circuit 51). The other processes in the vertical direction interpolation circuit 51, the signal selection circuit 52, the representative point storage circuit 53, the correlation calculation circuit 54, and the motion vector detection circuit 55 are the same as those in the above-described fourth embodiment, and therefore will 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 having a certain optimum characteristic is used to detect a vertical direction between fields of a video signal by interlacing. Even if a vertical direction interpolation circuit is added to correct the error in the image motion vector caused by the pixel shift, a new filter circuit is newly provided to obtain the filter effect with the optimum characteristics in both fields. It is possible to realize a circuit configuration capable of performing.

It should be noted that the filter circuit 56 and the filter circuit 57 are described as being divided into two circuits here, but it is not particularly necessary to divide them into two, and it is clear that the common portion may be shared to form one filter circuit. 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 may be incorporated in the filter circuits 56 and 57.

Further, although the filter circuit is provided in the preceding stage of the image motion detection circuit in the present embodiment, it is not limited to this.
For example, a configuration in which a filter circuit 57 is placed between the vertical direction 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 direction interpolation circuit 51. In this case, the filter selection circuit 58 and the signal selection circuit 52 can be shared.

Further, although the present embodiment has shown the configuration example in which the filter circuit is added to the fourth embodiment, this embodiment is also applicable to the case where the filter circuit is added to the above-mentioned first, second and third embodiments. Obviously, the addition of a filter circuit such as in is useful.

As described above, according to the present invention, when an image motion vector is detected for an interlaced video signal, a detected image is generated due to vertical pixel shift between fields due to interlacing. It is possible to correct the error of the motion vector by the vertical direction interpolation circuit, thereby improving the detection accuracy of the image motion vector.

Further, at this time, when the video signal interpolation processing is added to the conventional image motion detecting device provided with the filter circuit for extracting the image feature from the video signal, the case where the video signal interpolation calculation processing is performed and the case where it is not performed In this case, it is possible to eliminate the difference in effect due to the overall filter and further improve the detection accuracy of the image motion vector.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an image motion detecting apparatus according to the first embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of an image motion detecting apparatus according to the second embodiment of the present invention. FIG. 4 is a block diagram showing the arrangement of an image motion detecting apparatus according to the third embodiment of the present invention, and FIG. 4 is the fourth embodiment of the present invention.
5 is a block diagram showing the configuration of an image motion detecting apparatus in the embodiment of FIG. 5, FIG. 5 is a block diagram showing the configuration of the image motion detecting apparatus in the fifth embodiment of the present invention, and FIG. 6 is a diagram of the conventional image motion detecting apparatus. FIG. 7 is a block diagram showing a configuration, FIG. 7 is a block diagram showing a configuration of a conventional image motion detecting device having a filter circuit for feature extraction, and FIG. 8 is an explanatory diagram for explaining an interlaced video signal. . 11,21,31,41,51 ... Vertical interpolation circuit, 12,22,32,43,53
...... Representative point memory 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 memory output control circuit, 42, 52 …… Signal selection circuit, 56, 57 …… Filter circuit, 58 …… Filter selection circuit.

Claims (4)

(57) [Claims] 1. An interlace type input video signal,
A vertical direction interpolation circuit that performs vertical direction interpolation processing to match the positions of scanning lines between consecutive field images and outputs the vertically interpolated video signal as a vertical direction interpolation video signal; A vertical point interpolated video signal from the interpolation circuit is divided into a plurality of areas, a signal corresponding to a representative point of each area is stored as a representative point signal, and a representative point storage circuit that outputs each representative point signal of the previous field is provided. A correlation calculation circuit for performing a correlation calculation between each representative point signal of the previous field from the representative point storage circuit and a corresponding signal in each region of the input video signal of the current field, A motion vector detection circuit that detects an image motion vector from the obtained calculation result, and a detection error included in the image motion vector obtained from the motion vector detection circuit. A motion vector correction circuit that corrects based on field information for discriminating odd / even fields, wherein the motion vector correction circuit generates every other field when the motion vector detection circuit detects the image motion vector. An image motion detecting device characterized by correcting a detection error corresponding to one scanning line interval. 2. An interlaced input video signal,
A vertical direction interpolation circuit that performs vertical direction interpolation processing to match the positions of scanning lines between consecutive field images and outputs the vertically interpolated video signal as a vertical direction interpolation video signal; A signal is divided into a plurality of areas, a signal corresponding to the representative point of each area is stored as a representative point signal, and a representative point memory circuit that outputs each representative point signal of the previous field, and the representative point memory circuit A correlation calculation circuit for performing a correlation calculation between the signals in the respective areas of the vertical interpolation video signal of the current field from the vertical interpolation circuit corresponding to each representative point signal of the previous field, and the correlation calculation circuit. A motion vector detection circuit that detects an image motion vector from the obtained calculation result, and a detection error included in the image motion vector obtained from the motion vector detection circuit. A motion vector correction circuit that corrects based on field information for discriminating odd / even fields, wherein the motion vector correction circuit generates every other field when the motion vector detection circuit detects the image motion vector. An image motion detecting device characterized by correcting a detection error corresponding to one scanning line interval. 3. An interlaced input video signal,
A vertical direction interpolation circuit that performs vertical direction interpolation processing to match the positions of scanning lines between consecutive field images and outputs the vertically interpolated video signal as a vertical direction interpolation video signal; A signal selection circuit that selects an interpolated video signal and the input video signal based on field information for discriminating odd / even fields, and an output signal from the signal selection circuit is divided into a plurality of areas, and a representative point of each area is set. A representative point storage circuit that stores a corresponding signal 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 signal A correlation calculation circuit that performs a correlation calculation between signals in the respective regions of the output signal of the selection circuit, and an image motion vector from the calculation result obtained from the correlation calculation circuit. An image motion detecting apparatus comprising: a motion vector detecting circuit for detecting. 4. A plurality of filter circuits for extracting image features from an input video signal, and field information for discriminating odd / even fields from outputs of the plurality of filter circuits in association with an image motion detecting device. The interpolated input video signal, which is selected by, is interpolated in the vertical direction to align the scanning lines between consecutive field images, and the video signal is interpolated in the vertical direction. A vertical direction interpolation circuit for outputting as a vertical direction interpolation video signal, a signal selection circuit for selecting the vertical direction interpolation video signal and the input video signal based on field information for discriminating odd / even fields, and the signal selection circuit. The output signal of is divided into a plurality of areas, the signal corresponding to the representative point of each area is stored as a representative point signal, and A representative point storage circuit that outputs each representative point signal, and a correlation calculation between each representative point signal of the previous field from the representative point storage circuit and the corresponding output signal of the signal selection circuit in each of the regions And a motion vector detection circuit that detects an image motion vector from the calculation result obtained from the correlation calculation circuit, wherein at least one filter circuit among the plurality of filter circuits is its own. The characteristic obtained by multiplying the filter characteristic by the filter characteristic of the vertical direction interpolation circuit is substantially equal to at least one other filter characteristic of the plurality of filter circuits, and both the filter selection circuit and the signal selection circuit are in the field. An image motion detection device characterized by being controlled substantially simultaneously by information.