JPH0640103B2 - Measuring point information transfer method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides real-time measurement of coordinates of moving measurement points present in moving image information supplied from a video output device such as a television camera and a video tape recorder. The present invention relates to a measurement point information transfer method applied to a dynamic measurement device that calculates and measures the behavior of the measurement point.

[Prior Art] Conventionally, there is known a dynamic measurement device that captures a flying object, a vibrating object, a moving object, and the like with a television camera, calculates their position coordinates in real time, and displays a trajectory.

In this type of device, a measurement marker is attached to a measurement point of a target object to illuminate it, or a light source is attached to the measurement point to prepare a measurement environment. Only the high-brightness portion is extracted from the information as the measurement point, and the XY coordinates of the center of gravity position of the measurement point are calculated in real time based on the image information of the extracted measurement point, and predetermined processing such as locus display is performed. I am trying to do it. Further, in this apparatus, in order to separate a plurality of measurement points existing in one screen and independently calculate coordinate information of each measurement point, for example, a light pen or the like surrounds each measurement point. The window is set so that only the measurement points existing in this window are processed.

[Problems to be Solved by the Invention] By the way, in this kind of dynamic measuring device, in order to improve the extraction accuracy of the measurement points by clearly distinguishing the measurement points from the background,
In addition, use a marker that contains color information as the index of the measurement point in order to be able to extract multiple measurement points independently and perform measurement without hindrance even when the measurement points are close to each other. Can be considered.

When the measurement points are extracted by color information, in order to improve the extraction accuracy, RY, BY, Y signals or R, G, Y signals obtained by a color TV camera before becoming NTSC signals are used.
It is desirable to perform color extraction directly from the B signal or the like. Therefore, it is possible to attach a measurement point extraction circuit to the color TV camera.

On the other hand, since the measurement point processing device that processes the image information of each extracted measurement point is generally installed at a position apart from the color TV camera, the image information of each extracted measurement point is It is transferred to the measuring point processing device via a signal cable. Therefore, if the number of measurement points is large, the number of signal cables increases, and there is a problem that the setting of the device during dynamic measurement becomes complicated.

The present invention has been made in view of such problems,
An object of the present invention is to provide a measurement point information transfer method capable of easily setting the device even when simultaneously measuring a large number of measurement points, automatically identifying a plurality of measurement points, and performing high-speed processing. To do.

[Means for Solving the Problems] In the measuring point information transfer method according to the present invention, a mark of a color unique to the measuring point selected from a plurality of colors is attached to a plurality of moving measuring points, and the moving image information is recorded. Image information of a plurality of moving measurement points existing in each of them is extracted based on the color mark, and the image information of each of the extracted moving measurement points is superposed with different brightness levels, and is transmitted through the signal transmission path. And transfers it to the measurement point processing device. In the measuring point information transfer method according to the present invention, a mark of a color unique to the measuring point selected from a plurality of colors is attached to a plurality of moving measuring points, and the color is measured by the color television camera. An image of the mark is picked up to obtain a color signal and a luminance signal indicating the ratio of the three primary colors, each measurement point is identified from the former, each measurement point is white or black from the latter, and the other portions are black or white respectively. An image signal indicating the position of the measurement point is formed, and by making the brightness of these image signals different for each measurement point, each measurement point position can be identified even if each image signal is superimposed, It is characterized in that the data is transferred to the measurement point processing device via a signal transmission path.

[Operation] According to the present invention, the extracted image information of each moving measurement point is superimposed at different brightness levels. Therefore, the information of many measurement points is multiplexed into one signal. Therefore, according to the present invention, since information of a large number of measurement points can be placed on one signal and transferred to the measurement point processing device, the signal transmission path can be simplified.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of a two-dimensional movement measuring apparatus according to the first embodiment to which the measuring point information transfer system of the present invention is applied.

In FIG. 1, a camera device 3 for picking up an image of a measurement target 1 is installed near the measurement target 1. On the other hand, a measurement point processing device 9 is installed at a position away from the camera device 3. The camera device 3 and the measurement point processing device 9 are connected via a signal cable 4.

Markers 2a, 2b, and 2c of different colors such as red, blue, and green are attached to each measurement point of the measurement target 1, respectively. The camera device 3 is configured by adding a measurement point extraction circuit 3b to the color TV camera 3a. The color TV camera 3a captures an image of the measurement target 1 to which the markers 2a to 2c are attached, and outputs color image signals such as RY, BY, and Y signals to the measurement point extraction circuit 3b. The measurement point extraction circuit 3b extracts a color previously determined as the color of the marker from the color image signal, and transfers the color extraction signal and the original image signal to the measurement point processing device 9 via the signal cable 4.

The measurement point processing device 9 includes a measurement point processing circuit 5, a monitor 6, a light pen 7, and a data processing device 8. The measurement point processing circuit 5 obtains the XY coordinates and the like of the center of gravity of the measurement point based on the input color extraction signal, and moves a preset window so as to follow the obtained coordinates of the center of gravity of the measurement point. At the same time, display control of the original image, the window, the locus of the measurement point, and the video information such as necessary character information is performed. The measurement point processing circuit 5 includes a monitor 6 for displaying the video information, a light pen 7 for setting the window, and an X of the obtained measurement point.
A data processing device 8 that receives data such as Y coordinates and area in real time and performs predetermined data processing is connected.

The measurement point extraction circuit 3b is configured, for example, as shown in FIG. That is, the color image signals RY, BY, and Y from the color TV camera 3a are input to the video controller 10 and the eight color extraction controllers 1 are provided.
It is input to 1 ₀ , 11 ₁ , ..., 11 ₇ . Moreover, these color extraction controller 11 _{0-11 7,} the color extraction condition information from the extraction condition controller 12 R-Ymin / max, B
-Ymin / max and Ymin / max are given. This color extraction condition can be set by the panel switch 13. On the other hand, the synchronization controller 14 switches between an internal synchronization signal and an external synchronization signal given from the outside, and outputs a horizontal synchronization signal HD and a vertical synchronization signal VD.

A color extraction controller ₁₁ 0-11 ₇ is each specific color extraction condition is set, the color extraction controller 11 ₀
To 11 _7, the synchronizing signal HD, according VD, a color image signal R-Y from the color TV camera 3a, B-Y,
From Y, the color extraction monochrome signals S _CEO , S _CE1 , which have white portions that meet the color extraction conditions and black portions that do not, and
…, Outputs S _SE7 . Video controller 10 to distinguish the color extraction monochrome signal S _CE0 to S _CE7 from these color extraction controller ₁₁ 0-11 _7, signal S _CE0
~ S _CE7 is converted into eight luminance levels, all the converted signals are superimposed, and this is output as a color extraction signal. The video controller 10 also controls the color image signal R
-Y, B-Y, Y are output as original image signals synchronized with the synchronizing signals HD, VD.

The measurement point processing circuit 5 is configured as shown in FIG. 3, for example. That is, the main control unit 26 is a controller that controls the overall operation of the measurement point processing circuit 5.
A light pen controller 27 and a panel switch 28 are connected to the main control unit 26, and these can be used to select an extraction image of a measurement point, instruct a locus display, set a window, and the like. ing. Further, this circuit is also provided with a sync signal controller 22 so as to output the sync signals HD and VD by switching between an internal sync signal and an external sync signal given from the outside.

On the other hand, the color extraction signal from the measurement point extraction circuit 3b is 8
It is input to each of the intermediate luminance extraction units 21 ₀ , 21 ₁ , ..., 21 ₇ . Intermediate brightness extraction part 21 _{0-21 7,} wherein the synchronization signal HD, based on the VD and extracts the corresponding gray levels of the eight luminance levels previously described from the color extraction signal, and a white level portion of the level Output a binary video signal. This binarized video signal is supplied to the selector 2
12 window controllers 24 ₀ , 2 through 3
4 _1, ..., it has been entered in the 24 _11. The selector 23 is
Each output of the intermediate luminance extraction portion ₂₁ 0-21 _7, what determines whether to supply to which window the controller ₂₄ 0 - 24 _11, the intermediate luminance extractor ₂₁ 0 under the control of the main control unit 26 to 21 ₇ and window controller 24 _0-
24 ₁₁ is connected. Window controller 24 ₀ ~
24 _11, XY coordinates of the measurement points in the window defining the measurement target area, calculates the area and the like for each 1TV frame (one field), and trajectory display and window display control.

The window and trajectory information from the window controllers 24 _{0 to} 24 ₁₁ are supplied to the monitor display controller 20. Further, the monitor display controller 20 has
In addition to these, the original image signal, the binarized video signal, and the message character information from the character plane 25 are input. The monitor display controller 20 uses the respective information as the basis for the original image, the binarized image, the window,
It controls the display of the trajectory and the character plane and outputs a video signal.

Further, the data such as the XY coordinates and the area of the measurement points calculated by the window controllers 24 _{0 to} 24 ₁₁ are transmitted to the data processing device 8 via the GP-IB interface 29 for each TV frame. .

The window controllers 24 _{0 to} 24 ₁₁ are configured as shown in FIG. 4, for example. That is, the horizontal synchronization signal HD is input to the clock generation circuit 31. The clock generation circuit 31 generates and outputs a dot clock signal having a period of one horizontal pixel synchronized with the horizontal synchronization signal HD. This dot clock signal is input to the X counter 32. The X counter 32 is the X of the binarized video signal.
Output address. The horizontal synchronizing signal HD is input to the Y counter 33. The Y counter 33 outputs the Y address of the binarized video signal.

Further, the position coordinates X _i , Y _{i of the} window given from the main control unit 26 and the half width information XW /
The 2 and 1/2 height information YH / 2 is stored in the register 36, respectively.
38, 35, 37. The adder 39 and the subtractor 40 add / subtract the contents of the registers 35 and 36 and output information on the range of the window in the X direction to the comparator 43. The comparator 43 outputs one level when the X address from the X counter 32 is within the above range. Further, the adder 41 and the subtractor 42 add / subtract the contents of the registers 37 and 38 to obtain information on the range in the Y direction of the window by the comparator 44.
Output to. The comparator 44 outputs 1 level when the Y address from the Y counter 33 is within the above range. The outputs of these comparators 43 and 44 are input to the AND gate 45. The output of the AND gate 45 is A
It is supplied to one input of the ND gate 46.

On the other hand, from the intermediate brightness extraction part ₂₁ 0-21 ₇ selector 23
The binarized video signal input via the AND gate 3
4 is provided to one input. AND gate 34
Is a clock generation circuit 3 provided to the other input end.
The binarized video signal is output to the other input terminal of the AND gate 46 in synchronization with the dot clock signal from 1. AND
The gate 46 outputs a white level signal included in the binarized video signal in accordance with the dot clock signal when the output of the AND gate 45 is 1 level, that is, while the binarized video signal is scanning the window. . This output is given as the addition pulse of the cumulative adders 47 and 49 and the clock signal of the counter 51. Cumulative adders 47, 49
Respectively cumulatively adds the X address and the Y address. The outputs of these cumulative adders 47 and 49 are respectively dividers 48 and
Is given to fifty. The dividers 48 and 50 output the outputs of the cumulative adders 47 and 49, respectively, to the count value n of the counter 51.
And outputs the X coordinate X _{i + 1} and the Y coordinate Y _{i + 1} of the position of the center of gravity of the measurement point. Further, the counter 51 outputs data S _{i + 1} corresponding to the area of the measurement point.

Next, the operation of the movement measuring apparatus according to this embodiment configured as described above will be described.

First, when performing dynamic measurement, the marker 2 is attached to the measurement target 1.
Attach a to 2c. In this apparatus, the eight color extraction controller ₁₁ 0-11 _7, because it has a 12 window controller ₂₄ 0 - 24 _11, in one measurement, the color type is divided into eight 12 Individual markers can be set. In the present device, not only the luminance information of the markers 2a to 2c but also the color information thereof is used when measuring points are extracted. Therefore, when setting the markers 2a to 2c, it is sufficient to select a color that is not used for the background. There is an advantage that the measurement environment can be easily set.

When the image of the measurement object 1 marker 2a~2c is attached are taken by a color TV camera 3a, the color extraction controller ₁₁ 0-11 ₇ measurement points release circuit 3b, a color image signal from the color TV camera 3a RY, B-
Color extraction is performed from Y and Y according to each color extraction condition. As a result, as shown in FIG. 5, a binary color extraction monochrome signal S _CE0 in which only the portion that matches the color condition has the white level.
~ S _CE7 is output. These color extraction monochrome signals S
_{CE0 to} S _CE7 are superimposed on each other in the video controller 10 and converted into a color extraction signal including a gray code level as shown in FIG.

FIG. 6 is a schematic diagram showing the relationship between the gray code level in the color extraction signal and its color extraction condition. In this embodiment, the signals R-Y, B-Y, and Y are all max.
From the white level indicating the extraction signal of the color satisfying the condition (H), each signal of RY, BY, and Y is all at the black level indicating the extraction signal of the color satisfying the condition of (L), Eight levels in total are set corresponding to the extraction conditions. The color extraction signal consisting of these eight levels is a serial signal containing the position and color information of each measurement point. Therefore, even when the measurement point processing device 9 is located away from the camera device 3, it is possible to reduce the number of signal cables 4 connecting the two.

Then color extraction signal is input to the intermediate luminance extraction portion 21 _{0-21 7} measurement points processing circuit 5, where for example, eight levels of the portion described above by the comparator or the like are respectively detected.
The output from the intermediate brightness extraction part ₂₁ 0-21 _7, the control of the monitor display controller 20, the monitor 6, for example, as shown in FIG. 7, the image information 61a of the screen 60,
Displayed as 61b and 61c. The output of the intermediate luminance extraction portion ₂₁ 0-21 ₇ is given to the window controller ₂₄ 0 - 24 ₁₁ through the selector 23.
The window controllers 24 _{0 to} 24 ₁₁ perform the following processing.

That is, first, as shown in FIG. 7, using the light pen 7 or the like, the windows 62a, 62 corresponding to the respective measurement points are displayed.
b and 62c are set. Windows 62a-62c
Are image information 61a to 6 which are considered to be measurement points on the screen 60.
It is set by surrounding 1c by inputting two diagonal points, for example. Coordinates X _i and Y _i of the center position of each window 62a to 62c, and the width XW and height Y of the window.
The information of H is obtained by the main control unit 26 and given to each of the window controllers 24 _{0 to} 24 ₁₁ .

In the window controllers 24 _{0 to} 24 ₁₁ , as shown in FIG. 4, in the AND gate 34, the white level portion including the binarized video signal, that is, the portion extracted as the color of the measurement point is the clock generation circuit 31. It is output in synchronization with the dot clock from. On the other hand, since the AND gate 45, which outputs the theoretical product of the outputs of the comparators 43 and 44, outputs a signal indicating the position of the set window, the AND gate 46 outputs the measurement existing in the window. Image information 61a to 61 extracted as the color of dots
The image signal c is output in synchronization with the dot clock signal. Therefore, the output of the AND gate 46 causes the cumulative adders 47 and 49 to function, cumulatively adds the XY coordinates of the extracted portion, and the dividers 48 and 50 calculate the average thereof to obtain the image extracted as the measurement point. The coordinates X _{i + 1} and Y _{i + 1} of the barycentric position of the information 61a to 61c can be obtained. Also, the counter 51 obtains the areas of the image information 61a to 61c extracted as the measurement points. The obtained measurement point data is transferred to the data processing device 8 via the GP-IB interface 29, and is subjected to a predetermined dynamic measurement process.

The data of the measurement points is calculated for each TV frame, and the data is sent to the data processing device 8 each time,
The positions of the windows 62a to 62c are updated so that the center positions match the obtained XY coordinates. This allows
The windows 62a to 62c can be made to follow the movement of the measurement points. Also, by sequentially writing 1 as image data to an address corresponding to the XY coordinates of the measurement point in an image memory (not shown), the locus 63 of the measurement point is obtained.
A, 63b, 63c can be drawn on the screen 60. Furthermore, by giving the original image signal to the monitor 6,
It is also possible to superimpose and display the information such as the measurement point, window, and trajectory on the current image.

The present invention is not limited to the above-mentioned embodiments. For example, although the measuring point information transfer method of the present invention is applied to the two-dimensional movement measuring device in the above-described embodiment, the present invention can also be applied to a three-dimensional movement measuring device. in this case,
Two systems of the above-mentioned two-dimensional movement measuring device are provided, and the two-dimensional coordinates obtained in each system are converted into three-dimensional coordinates by the three-dimensional data processing circuit.

Further, in each of the above embodiments, the color information set as the marker is extracted from the color image signal output from the color TV camera, and the multiplexed color extraction signal is transferred to the measurement point processing device. For example, after the color extraction signal including the obtained gray level is recorded on a video tape recorder or the like, the video tape recorder may be connected to the measurement point processing device to perform image processing of measurement points.
In this case, one video tape recorder can record information on a plurality of measurement points and use it for dynamic measurement.

In addition, the calculation cycle of the coordinates of the measurement point does not have to be performed for every 1 TV frame, but may be performed for every several TV frames.

[Effects of the Invention] As described above, according to the present invention, the image information of a plurality of moving measurement points extracted from the moving image information is superimposed with different brightness levels, and the signal information is transmitted through the signal transmission cover. Since the information is transferred to the measurement point processing device, information of a large number of measurement points can be multiplexed and transferred in one signal, and the signal transmission path can be simplified. Further, since the moving measurement points are colored and the image information is extracted based on the color marks, it is possible to automatically identify a plurality of moving measurement points and process them at high speed.

[Brief description of drawings]

1 to 7 are views for explaining a two-dimensional movement measuring apparatus according to an embodiment of the present invention. FIG. 1 is a block diagram showing the configuration of the apparatus, and FIG. 2 is a measurement point in the apparatus. Detailed block diagram of the extraction circuit, FIG. 3 is a detailed block diagram of the measurement point processing circuit in the same device, FIG. 4 is a detailed block diagram of the window controller in the measurement point processing circuit, and FIG.
FIG. 7 is a waveform diagram showing the operation of the device, FIG. 6 is a schematic diagram showing a gray code level of a color extraction signal, and FIG. 7 is a schematic diagram showing an example of a display image by the device. 1; measurement target, 2a, 2b, 2c; marker, 3; camera device, 3a; color TV camera, 3b; measurement point extraction circuit, 4; signal cable, 5; measurement point processing circuit, 6; monitor, 7; light Pen, 8; data processing device, 9; measurement point processing device, 60; screen, 61a to 61c; image information, 6
2a to 62c; window, 63a to 63c; trajectory

Claims (1)

[Claims] 1. A color signal indicating a ratio of three primary colors when a mark of a color unique to a measurement point selected from a plurality of colors is attached to a plurality of moving measurement points and the color mark is picked up by a color television camera. And a luminance signal, identify each measurement point from the former, form an image signal indicating the position of each measurement point from the latter, where each measurement point is white or black, and the other portions are black or white, respectively. By making the luminance of the image signal different for each measurement point, each measurement point position can be identified even if each image signal is superimposed, and then each image signal is transferred to the measurement point processing device via the signal transmission path. A measurement point information transfer method characterized in that