JP3075934B2 - Motion vector detection circuit and subject tracking camera device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motion vector detecting circuit and a subject tracking camera apparatus using the same, and more particularly, to a motion vector detecting circuit used for a video camera for automatically tracking a subject and a subject using the same. The present invention relates to a tracking camera device.

[0002]

2. Description of the Related Art As a subject tracking technique when a subject moving in a screen is photographed by a camera, there is a technique using color information. For example, color information is detected from a video signal in a designated detection block, and the detected color information is registered as a specific color to be used for discrimination of a target subject.

[0003]

In this prior art, the color of a part which is a minute area for a subject, not the color representative of the subject, accidentally enters a designated detection block and most of the detection block. May be registered as a specific color even if it occupies an area. At this time, the specific color to be registered is set with the area of the color representative of the subject being smaller than that of the detection block, that is, greatly influenced by the color of the portion that is a minute region as the subject. However, there is a problem that it is difficult to track the subject based on the specific color.

[0004] Therefore, a main object of the present invention is to provide a novel motion vector detecting circuit. It is another object of the present invention to provide a subject tracking camera device that can accurately track a subject.

[0005]

According to a first aspect of the present invention, there is provided a motion vector detecting circuit for setting a plurality of detection blocks in a motion vector detection area and detecting a motion vector of a subject using color information of the detection blocks. A first calculating unit that obtains first color information data based on color information of a specific detection block, and obtains second color information data for each desired detection block based on color information of each desired detection block A motion vector comprising: a second calculating unit; and a registration determining unit that determines whether to register the first color information data for detecting a motion vector based on the first color information data and the second color information data. It is a detection circuit.

A second invention is a subject tracking camera device using the above-described motion vector detection circuit.

[0007]

First, first color information data of a specific detection block among a plurality of detection blocks set in a motion vector detection area is calculated by a first calculating means, and a second color information data of each desired detection block is calculated. The information data is calculated by the second calculation means. The color information constituting the first color information data and the second color information data includes, for example, Y, RY, B
-Includes three different types of color elements such as a Y signal and Y, Cr, Cb signals.

[0008] Then, the correlation means included in the registration judging means detects a correlation value between the first color information data and the second color information data, and the comparison means compares the correlation value with a predetermined threshold value. The registration determination unit determines whether to register the first color information data of the specific detection block based on the comparison result. Here, the registration judging means includes a first registration judging means and a second registration judging means, and the first registration judging means or the second registration judging means is selected by the selecting means according to the state of the subject or the like.

When using the first registration judging means, the second
Calculating the second color information data for every detection block, and using the second registration judging means, when using the second registration judging means, each detection block around a specific detection block less than the total number of detection blocks, for example, diagonally upper left, right The second color information data of each of the detection blocks at the obliquely upper, lower left, and lower right is calculated by the second calculating means.

In the first registration determining means, if the ratio of the detection blocks satisfying “correlation value <threshold value” to all the detection blocks is, for example, 80% or more, the first color information data of the specific detection block is determined. It is determined to register. The second registration determination means determines that the first color information data of the specific detection block is to be registered if all the detected blocks to be compared satisfy “correlation value <threshold”.

As described above, whether or not to register the first color information data of a specific detection block is determined by the registration determination means.
That is, it is determined whether the first color information data can be used as the representative color of the subject. Therefore,
Only highly reliable first color information data is used as first color information data for subject tracking. When the first color information data is registered, a standby state of the subject tracking operation is set, and in the subsequent subject tracking operation, the subject is tracked based on the registered first color information data. Meanwhile, the first
When the color information data is not registered, the apparatus enters a standby state for the registration determination operation again.

[0012]

According to the present invention, it is determined whether or not to register first color information data for tracking a subject, and only the highly reliable first color information data determined to be registered is represented by the representative of the subject. The color is used for tracking the subject. In other words, if the color of a portion that is a minute region as a subject, not the representative color of the subject, is accidentally included in a specific detection block, the first color information data is not registered. Therefore,
The motion vector can be detected more accurately, the camera can easily follow the subject, and the subject can be tracked more accurately.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0014]

FIG. 1 shows an object tracking camera device 10 constructed using a motion vector detection circuit 16 (see FIG. 2). The subject tracking camera device 10 includes a camera 12 that images a subject and converts the image into a video signal. The subject is displayed on the viewfinder 14 of the camera 12, and “NG” indicating that the integrated color data of the color information stored in the representative color memory 80 is not registered is displayed. The video signal from the camera 12 is provided to a motion vector detection circuit 16. The motion vector detection circuit 16 is configured, for example, as shown in FIG.

The motion vector detecting circuit 16 shown in FIG.
An A / D converter 18 is included. The A / D converter 18 converts the given video signal into digital data for each pixel. This digital data is, for example, Y, RY, B
-Data obtained by digitizing the Y signal. The video signal is supplied to the H-SYNC separation circuit 20 and the horizontal address counter 22. Horizontal address counter 22
In, the number of pixels in the horizontal direction is counted according to the video signal, and is reset for each line based on the horizontal synchronization signal from the H-SYNC separation circuit 20. The output from the horizontal address counter 22 is applied to a horizontal decoder 24, which outputs six types of horizontal signals H0 to H5.
Is output.

The video signal is applied to a V-SYNC separation circuit 26 and a vertical address counter 28. In the vertical address counter 28, the number of pixels in the vertical direction is counted according to the video signal, and V-SYN
It is reset based on the vertical synchronizing signal from the C separation circuit 26. The output from the vertical address counter 28 is applied to a vertical decoder 30, and the vertical decoder 30 outputs five types of vertical signals V0 to V4.

The horizontal signals H0 to H5 and the vertical signal V
0 to V4 are signals as shown in FIGS. 3A to 3C, for example. In FIG. 3, a motion vector detection area 34 displayed on a screen 32 of the viewfinder 14 is shown.
In this embodiment, for example, 25 detection blocks 36
Is divided into Further, the motion vector detection circuit 16
PU38. A switch 40 is connected to the CPU 38. The switch 40 includes a tracking mode switch 42 a for setting the subject tracking mode, and whether or not to register the integrated color data of the color information stored in the representative color memory 80, that is, whether or not to register the integrated color data and use it for detecting a motion vector. Registration determination switches 42b and 42c for determining whether
including.

Referring also to FIG. 4, registration judgment switch 42
When b is turned on, it is determined whether or not to register the integrated color data of the color information using all the detection blocks 36. This mode is hereinafter referred to as “registration determination mode 1”. on the other hand,
When the registration determination switch 42c is turned on, the integrated color data of the color information is registered using the detection blocks 36b to 36e at the upper left, lower right, lower left, and lower right of the specific detection block 36a. Is determined. This mode is hereinafter referred to as “registration determination mode 2”. These registration determination modes are performed only in the initial field, that is, in one field period after the registration determination switch 42b or 42c is turned on. Note that the registration determination switch 4
When the switch 2b is turned on, the signal b is output from the CPU 38 only in the initial field, and when the registration determination switch 42b is turned on, the signal c is output only in the initial field.
When the tracking mode switch 42a is turned on, the mode is the subject tracking mode, and the signal a is output as long as the subject tracking operation is performed.

Further, a ROM 44 and a RAM 46 are connected to the CPU 38. A program for controlling the operation of the motion vector detection circuit 16 is stored in the ROM 44, and a determination flag indicating whether or not to register the integrated color data of the color information stored in the representative color memory 80 is stored in the RAM 46. Is stored. The digital data of the video signal includes horizontal signals H0 to H3 and vertical signals V0 to V3.
3, and are latched by a latch circuit 48 based on signals a, b and c from the CPU 38.

That is, when the registration determination switch 42b is turned on, a signal b is output from the CPU 38 to the OR gate 50 and the AND gate 52 during the initial field period. When the horizontal signal H0 and the vertical signal V0 are output in this initial field, an enable signal is output to the latch circuit 48 via AND gates 54 and 56. When the horizontal signal H3 and the vertical signal V3 are output in the initial field, the AND gate 58,
An enable signal is applied to the latch circuit 48 via the AND gate 60 and the OR gate 60.

Then, the latch circuit 48 latches the data of each pixel of the specific detection block 36a shown in FIG. 4A based on the enable signal from the AND gate 56. In the latch circuit 48, the AND gate 5
2 and data of each pixel of each of the 25 detection blocks 36 shown in FIG. 4B are latched on the basis of the enable signal provided through the OR gate 60.

When the registration determination switch 42c is turned on, a signal c is output from the CPU 38 to the AND gate 62 during the initial field period. At this time, the horizontal signal H1
And vertical signal V1, horizontal signal H1 and vertical signal V
2, when the horizontal signal H2 and the vertical signal V1 and the horizontal signal H2 and the vertical signal V2 are output, A
Via ND gates 64 to 70, OR gate 72, AND gate 62 and OR gate 60, latch circuit 4
8, an enable signal is output. Then, the latch circuit 48 latches the data of each pixel of the detection blocks 36b to 36e shown in FIG.

As can be seen from FIGS. 4 (A) and 4 (C), the detection blocks 36b to 36e are located at the upper left, lower right, lower left, and lower right of the detection block 36a, respectively. It is a detection block. When the tracking mode switch 42a is turned on, an AND operation is performed by the CPU 38.
Signal a is output to gate 74. At this time, when the horizontal signal H3 and the vertical signal V3 are output, an enable signal is supplied to the latch circuit 48 via the AND gate 74 and the OR gate 60. Then, the latch circuit 48 latches the data of each pixel of each of the 25 detection blocks 36 shown in FIG. 4B based on the enable signal.

Then, a detection block (FIG. 4A to FIG. 4A) corresponding to the enable signal is output from the latch circuit 48.
(C) is the detection block integrating circuit 7
6 given. The operation of the detection block integrating circuit 76 is
This will be described with reference to FIG. Detection block 36 shown in FIG.
Includes, for example, 8 × 8 = 64 pixels. The value of each of the three color elements constituting the color information of each pixel is
As shown in FIG. 5, let y _ij , (ry) _ij , and (by) _ij .

Then, the integrated color data (color information data) of the color information of the pixels included in the specific detection block 36a is obtained by Expression 1.

[0026]

(Equation 1)

The integrated color data is stored in the registration judgment switch 4
When 2b or 42c is turned on, it is obtained in the initial field and stored in the representative color memory 80 via the selector 78. The selector 78 is controlled by a control signal obtained by giving the signal b and the signal c to the OR gate 81. When either the signal b or the signal c is output, the integrated color data from the detection block integrating circuit 76 is output. Is supplied to the representative color memory 80 via the selector 78.
Given to.

When the registration determination switch 42b is turned on, the AND gate 52
Based on the enable signal applied to the latch circuit 48 via the OR gate 60, the data of the pixels of all 25 detection blocks 36 shown in FIG. Can be In the detection block integrating circuit 76, 25 detection blocks 3
For each of No. 6, the color information is integrated, and integrated color data is obtained. For each detection block 36, integrated color data obtained by integrating the color information of the pixels is obtained by Expression 2.

[0029]

(Equation 2)

The integrated color data corresponding to the number of the detection blocks 36 (25 in this embodiment) is stored in the integrated color memory 82. On the other hand, when the registration determination switch 42c is turned on, in the same initial field, the four detection signals shown in FIG. 4C are output from the latch circuit 48 based on the enable signal given through the AND gate 62 and the OR gate 60. The data of each pixel of the blocks 36b to 36e is supplied to the detection block integrating circuit 76. In the detection block integrating circuit 76, after the integrated color data is obtained by the equation 2, the integrated color data of each of the detection blocks 36 b to 36 e is stored in the integrated color memory 82.

When the tracking mode switch 42a is turned on and the signal a is output, the AND gate 74
And an enable signal provided via OR gate 60, and latch circuit 48 outputs the signal shown in FIG.
The data of each pixel of the five detection blocks 36 is given to the detection block integration circuit 76, and the detection block integration circuit 76
In this case, integrated color data is obtained by Equation 2, and the integrated color data is stored in the integrated color memory 82.

The detection block integrating circuit 76 includes, for example, counters A and B (not shown) for counting the number of pixels supplied from the latch circuit 48. Then, in this embodiment, if the counter A counts 8 × 8 = 64, the integrated color data is output from the detection block integration circuit 76 to the representative color memory 80. Similarly, when the counter B counts 8 × 8 × 25 = 1600 in “registration determination mode 1” and “subject tracking mode”,
In the “registration determination mode 2”, the counter B is 8 × 8 ×
When 4 = 256 is counted, the integrated color data is output from the detection block integrating circuit 76 to the integrated color memory 82, respectively.

The AN connected to the latch circuit 84
A horizontal signal H4 as shown in FIG.
And the vertical signal V4, the representative color memory 80
Is integrated and supplied to the correlator 88. The AND gate 9 connected to the latch circuit 90
When the horizontal signal H5 and the vertical signal V4 as shown in FIG. 3 (C) are applied to 2, the integrated color data in the integrated color memory 82 is latched and applied to the correlator 88. The horizontal signal H5 is output for the number of detected blocks. Therefore,
The horizontal signal H5 is 25 when in the “registration determination mode 1”.
Are output, and four are output in the “registration determination mode 2”.

The correlator 88 performs an operation on the integrated color data from the latch circuit 84 and the integrated color data from the latch circuit 90. That is, the absolute value of the difference is calculated for the integrated color data of each color element according to Equation 3, and the sum D _xy is calculated.

[0035]

Equation 3] _{D xy = | Y xy -Y0 |} + | (R-Y) xy - (R
−Y) 0 | + | (B−Y) _xy− (B−Y) 0 | This operation is performed for each detection block, and _Dxy, that is, a correlation value is obtained. Then, the selector 94 selects the selector 7
8, the signal is controlled by the control signal from the OR gate 81, and when the signal b or the signal c is being output, the correlation value from the correlator 88 is given to the threshold comparing circuit 96.
In other cases, the correlation value is calculated by the motion vector generation circuit 98.
Given to.

In the threshold comparison circuit 96, the correlation value obtained for each detection block is compared with a predetermined threshold. In the “registration determination mode 1”, the 25 correlation values are respectively compared with predetermined threshold values, and the comparison result is provided to the CPU. In the “registration determination mode 2”, the four correlation values are respectively compared with predetermined threshold values, and the comparison result is provided to the CPU.

In the "registration determination mode 1", if the ratio of the detection block satisfying the correlation value <threshold to all the detection blocks is 80% or more, for example,
In the “registration determination mode 2”, for example, all (4
If the correlation value <threshold value is satisfied in the detection blocks 36b to 36e, the representative color memory 80
Is determined to register the integrated color data stored in the. That is, the integrated color data is determined to be valid and used as the representative color of the subject. At this time, the determination flag stored in the RAM 46 is set to “1”. In other cases, the integrated color data stored in the representative color memory 80 cannot be used as the representative color of the subject, and the determination flag in the RAM 46 is set to “0”. When the determination flag is “1”, the standby state of the subject tracking operation is set. When the determination flag is “0”, the standby state of the registration determination operation is performed again.

When the judgment flag is "1",
Thereafter, when the tracking mode switch 42a is turned on, a normal subject tracking operation starts. In the subject tracking operation,
In the correlator 88, the integrated color data stored in the representative color memory 80, that is, the representative color of the subject, and the integrated color data stored in the integrated color memory 82 in the subsequent fields are calculated, and a correlation value is obtained. This correlation value is provided to the motion vector generation circuit 98 via the selector 94. The motion vector generation circuit 98, and the respective correlation value, that D _xy is compared, the center of the detection block 36a at a position D _xy is the minimum value is determined to be moving, showing the movement and direction of the object A motion vector is obtained (see FIGS. 6A and 6B). In the next field, as shown in FIG. 6C, the motion vector detection area 34 is moved by the amount of the motion vector.

Returning to FIG. 1, the motion vector detecting circuit 16
The motion vector is supplied to the pan head control circuit 100 from. The camera platform control circuit 100 drives the driving device 102 based on the given motion vector. Then, the movement of the camera platform 104 is controlled in the horizontal direction, the vertical direction, and the like by the driving device 102, and the tracking operation of the camera 12 is controlled accordingly. That is, the motion vector becomes zero (FIG. 6
The broken line part 34a shown in FIG.
4 is overlapped).

Next, with reference to FIGS. 7 to 9, the main operation of the subject tracking camera device 10 of this embodiment will be described. In step S1 shown in FIG. 7, it is determined whether the registration determination switch 42b has been turned on. “YE
If S ", the following" registration determination mode 1 "processing is performed.

That is, when a video signal is input in step S3, a vertical signal V0 is output in step S5, and a horizontal signal H0 is output in step S7, the process proceeds to step S9. In step S9,
The detection block integration circuit 76 calculates integrated color data of the color information of the detection block 36a, and in step S11, it is determined whether or not the counter A in the detection block integration circuit 76 has reached a predetermined count value. In this embodiment, it is determined whether or not the count value has reached 64.
If "YES", the flow advances to step S13 to store the accumulated color data of the color information in the representative color memory 80.
Go to 15. Steps S5, S7 and S11 are "N
If O ", the process proceeds to step S15.

When the vertical signal V3 is output in step S15 and the horizontal signal H3 is output in step S17, the process proceeds to step S19. In step S19, the integrated color data of each of the 25 detection blocks 36 is calculated by the detection block integration circuit 76, and the process proceeds to step S21. In step S21, it is determined whether or not the counter B in the detection block integrating circuit 76 has reached a predetermined count value. In this embodiment, 64 × 25 = 1600
Is determined. If “YES”, FIG. 8
In step S23 shown in (2), the accumulated color data is stored in the accumulated color memory 82, and the process proceeds to step S25. When steps S15, S17 and S21 are "NO", the operation proceeds to step S25.

When the vertical signal V4 is output in step S25 and the horizontal signal H4 is output in step S27a, the integrated color data stored in the representative color memory 80 is passed through the latch circuit 84 to the correlator 88 in step S29a. And the process proceeds to step S31. When the vertical signal V4 is output in step S25 and the horizontal signal H5 is output in step S27b, the integrated color data stored in the integrated color memory 82 is sent to the correlator 88 via the latch circuit 90 in step S29b. And the process proceeds to step S31. If steps S25, S27a and S27b are "NO", the process returns to step S3.

In step S31, a correlation operation is performed by the correlator 88. In this embodiment, correlation values are calculated for all 25 detection blocks 36. Then
In step S33, the threshold comparing circuit 96 determines whether or not the correlation value <the threshold value for the 25 correlation values. The result is given to the CPU 38, and this condition is
If not less than% of the detection blocks are satisfied, step S3
Proceed to 5a. In step S35a, the integrated color data stored in the representative color memory 80 is registered as the representative color of the subject. That is, the subject tracking camera device 10
Is in a standby state for the subsequent subject tracking operation, and ends.

On the other hand, in step S33, the correlation value <
If the ratio of the detection blocks 36 satisfying the threshold condition is less than, for example, 80%, the process proceeds to step S35b. In step S35b, the integrated color data stored in the representative color memory 80 does not become the representative color of the subject and is not registered. That is, the subject tracking camera device 10 enters a standby state of the registration determination operation, and in the subsequent registration determination mode, the integrated color data of the representative color memory 80 is updated, and it is determined again whether or not to register the integrated color data. Is done. And it ends.

Returning to FIG. 7, if step S1 is "NO", in step S37, the registration judgment switch 42
It is determined whether or not c is turned on. If "NO", the process returns to the step S1, and if "YES", the following "registration determination mode 2" processing is performed. That is, in step S39, a video signal is input, and in step S4
1, the vertical signal V0 is output and the step S43 is performed.
Is output in step S45.
Proceed to. In step S45, the integrated color data of the color information of the detection block 36a is calculated by the detection block integration circuit 76, and in step S47, it is determined whether or not the counter A has reached a predetermined count value. In this embodiment, it is determined whether or not the number has reached 64. If "YES", in step S49, the accumulated color data is stored in the representative color memory 80, and the process proceeds to step S51. When steps S41, S43, and S47 are "NO", the process proceeds to step S51.

When the vertical signal V1 is output in step S51 and the horizontal signal H1 is output in step S53, the process proceeds to step S55. In step S55, the detection block integration circuit 76 calculates the integrated color data of the detection block 36b shown in FIG. 4C, and proceeds to step S57. When step S53 is "NO", the process proceeds to step S57.

When the horizontal signal H2 is output in step S57, in step S59 shown in FIG.
The integrated color data of the detection block 36c shown in (C) is calculated, and the process proceeds to step S61. Steps S51 and S
When 57 is "NO", the flow proceeds to step S61. When the vertical signal V2 is output in step S61 and the horizontal signal H1 is output in step S63, the integrated color data of the detection block 36d shown in FIG. 4C is calculated in step S65, and the process proceeds to step S67. When step S63 is "NO", the process proceeds to step S67.

When the horizontal signal H2 is output in step S67, the integrated color data of the detection block 36e shown in FIG. 4C is calculated in step S69, and the flow advances to step S71. In step S71, it is determined whether or not the counter B has reached a predetermined count value. In this embodiment, it is determined whether or not 64 × 4 = 256. If “YES”, in step S73,
The accumulated color data is stored in the accumulated color memory 82, and the process proceeds to step S75. When steps S61, S67, and S71 are "NO", the process proceeds to step S75.

When the vertical signal V4 is output in step S75 and the horizontal signal H4 is output in step S77a shown in FIG. 9, the flow advances to step S79a. In step S79a, the integrated color data stored in the representative color memory 80 is output to the correlator 88 via the latch circuit 84, and the flow advances to step S81. Step S75
, A vertical signal V4 is output and step S77b
When the horizontal signal H5 is output in step S79,
Proceed to b. In step S79b, the integrated color memory 8
2 is output to the correlator 88 via the latch circuit 90, and the process proceeds to step S81. In addition,
If steps S75, S77a and S77b are "NO", the process returns to step S39.

In step S81, a correlation operation is performed by the correlator 88. In this embodiment, the detection block 36
Correlation values are obtained for the four detection blocks b to 36e, and the process proceeds to step S83. In step S83, the threshold value comparison circuit 96 compares each of the four correlation values with a predetermined threshold value. The comparison result is provided to the CPU 38. For example, if all four correlation values satisfy the condition of correlation value <threshold, the process proceeds to step S85a. Step S8
In step 5a, similarly to step S35a, the integrated color data stored in the representative color memory 80 is registered as the representative color of the subject, and the process ends. On the other hand, in step S83, for example, if there is at least one correlation value that does not satisfy the condition of correlation value <threshold, the process proceeds to step S85b, and as in step S35b, the integrated color data stored in the representative color memory 80 includes Is not registered as a representative color of
finish.

As described above, according to this embodiment, "registration determination mode 1" or "registration determination mode 2" can be selected as the registration determination mode, so that registration determination can be made in consideration of the state of the subject and the like. In this embodiment, the registration determination mode is switched, but only one of “registration determination mode 1” and “registration determination mode 2” may be employed. By employing the “registration determination mode 2”, it is possible to reduce the circuit scale and set a highly reliable representative color.

In the "registration determination mode 2" of the above-described embodiment, the registration is determined using the detection blocks 36b to 36e obliquely adjacent to the specific detection block 36a. However, the present invention is not limited to this. The registration can be determined using an arbitrary detection block around the block 36a. In the above embodiment, Y, RY, B
Three color components of the -Y signal were used. This is effective when processing a video signal or the like. In addition, primary color system C
When processing a signal such as a CD, three color elements of R, G, and B signals are used, and when processing a CCD or the like having a mosaic filter arranged in a complementary color system, Y, Cr (= R−2)
It is preferable to use three color elements of G) and Cb (= B-2G) signals.

Further, three color elements of R / Y, G / Y, and B / Y signals obtained by dividing the R, G, and B signals by the Y signal may be used. In this manner, by normalizing by dividing by the Y signal, it is possible to remove the influence of lightness due to a difference in illumination or the like, and if the hue and the saturation are the same, they can be regarded as the same color. The threshold value is set arbitrarily according to the required degree of correlation and the type of the color element constituting the color information.

In the above embodiment, the case where the motion vector detection circuit 16 is applied to the subject tracking camera device 10 has been described. However, the motion vector detection circuit of the present invention is also applied to a video camera having a camera shake correction device. It goes without saying that you can do it.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a subject tracking camera device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an example of a motion vector detection circuit.

3A is an illustrative view showing a horizontal signal and a vertical signal for generating an enable signal of a latch circuit 48, and FIG. 3B is a schematic diagram showing a horizontal signal and a vertical signal for generating an enable signal of a latch circuit 84; FIG. 4 is an illustrative view showing a signal,
FIG. 3C is an illustrative view showing a horizontal signal and a vertical signal for generating an enable signal of the latch circuit 90;

4A is an illustrative view showing a specific detection block, FIG. 4B is an illustrative view showing all detection blocks used in a registration determination mode 1, and FIG. FIG. 4 is an illustrative view showing four detection blocks used;

FIG. 5 is an illustrative view showing a detection block and pixels;

FIGS. 6A to 6C are illustrative views for explaining generation of a motion vector and an object tracking operation.

FIG. 7 is a flowchart showing main operations of this embodiment.

FIG. 8 is a flowchart showing a continuation of FIG. 7;

FIG. 9 is a flowchart showing a continuation of FIG. 8;

[Explanation of symbols]

 Reference Signs List 10 subject camera device 12 camera 16 motion vector detecting circuit 24 horizontal decoder 30 vertical decoder 38 CPU 40 switches 48, 84, 90 latch circuit 76 detection block integrating circuit 78, 94 selector 80 Representative color memory 82 ... Integrated color memory 88 ... Correlator 96 ... Threshold value comparison circuit 98 ... Motion vector generation circuit 100 ... Head head control circuit 102 ... Drive device 104 ... Head head

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 5/232 G06T 7/20 H04N 7/18

Claims (10)

(57) [Claims] 1. A motion vector detection circuit for setting a plurality of detection blocks in a motion vector detection area and detecting a motion vector of a subject using color information of the detection blocks, wherein a color of a specific detection block is First calculating means for obtaining first color information data based on information; second calculating means for obtaining second color information data for each desired detection block based on color information for each desired detection block; A motion vector detection circuit, comprising: registration determination means for determining whether to register the first color information data for the motion vector detection based on the first color information data and the second color information data. 2. The registration determining means according to claim 1, wherein said registration determining means detects a correlation value between said first color information data and said second color information data, a comparing means comparing said correlation value with a threshold value, and said comparing means. 2. The motion vector detection circuit according to claim 1, further comprising a determination unit configured to determine whether to register the first color information data based on a result of the comparison. 3. The second color information data obtained by the second calculation means includes second color information data for every detection block in the motion vector detection area.
The described motion vector detection circuit. 4. The second color information data obtained by the second calculating means is the second color information data of each detection block around the specific detection block which is smaller than the total number of detection blocks in the motion vector detection area. The motion vector detection circuit according to claim 1, further comprising: 5. The motion vector detection circuit according to claim 4, wherein each of the surrounding detection blocks includes a detection block on the upper left, lower right, lower left and lower right of the specific detection block. . 6. The registration determining means determines whether to register the first color information data based on the first color information data and the second color information data of all the detection blocks in the motion vector detection area. A first registration determination unit that determines whether the first color information data and the second color information data of each detection block around the specific detection block that is smaller than the total number of detection blocks in the motion vector detection area. A second step of determining whether to register the first color information data based on the second color information data
The motion vector detection circuit according to claim 1, further comprising a registration determination unit, further comprising a selection unit that selects one of the first registration determination unit and the second registration determination unit. 7. The motion vector detecting circuit according to claim 1, wherein said color information includes three different color elements. 8. The three color elements are Y, RY, B-
The motion vector detection circuit according to claim 7, wherein the motion vector detection circuit is a Y signal. 9. The motion vector detecting circuit according to claim 7, wherein said three types of color elements are Y, Cr, and Cb signals. 10. A subject tracking camera device using the motion vector detection circuit according to claim 1.