JPS63142772A - Picture rotary device - Google Patents

Abstract

PURPOSE:To attain the more precise observation of an object by mixing horizon tal and vertical deflection waveforms used for deflection scan with a prescribed ratio in correspondence with the rotary angle of a picture, generating a horizon tal mixed deflection waveform and a vertical mixed deflection waveform, and setting a rotary position in an appropriate position. CONSTITUTION:Outputs from a vertical deflection waveform generation circuit 1 and a horizontal deflection waveform generation circuit 2 are given to an adder 5 through variable resistors 3a and 3b, and to an adder 6 through variable resistors 4a and 4b, whereby both are mixed in the adders 5 and 6. The mixed ratio of the vertical deflection waveform and the horizontal deflection waveform by the variable resistors 3a and 3b, and 4a and 4b is appropriately adjusted based on the rotary angle theta of the picture. Namely, the variable resistors 3a and 3b, and the variable resistors 4a and 4b are adjusted in a state that the picture is projected on a monitor screen, and the objective picture rotation can be made while viewing the screen.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an image rotation device that rotates an image to a predetermined position when an image is captured by a television camera or displayed on a monitor.

(Prior art) Conventionally, when the ratio image system is fixed, such as in a microscope camera, the resolution is Because of the difference, when you want to observe a certain direction of an object with high resolution, you have to rotate the object so that that direction matches the high-resolution scanning line direction.

However, when the subject is particularly covered with microorganisms,
It is desirable to move it as little as possible.

Therefore, by digitally converting the image carried by a television camera, writing it into frame memory, and performing digital image processing, it is relatively easy to display the image rotated in any direction on a monitor, etc. can.

(Problem to be Solved by the Invention) However, when rotating an image by digital image processing, a frame memory with a storage capacity of at least one screen is required, and the rotation angle is also required for screen rotation. Since the image data in the 2-frame memory is read out by addressing based on the corresponding coordinate transformation and then subjected to D/A conversion to create a video signal, there is a problem that the image processing device becomes complicated and extremely expensive. there were.

(Means for Solving the Problems) The present invention has been made in view of these conventional problems, and provides a structure and method that can rotate an image to an arbitrary position by adjusting the horizontal and vertical deflection waveforms. It is an object of the present invention to provide an image rotation device that is easy to construct and inexpensive in terms of cost.

In order to achieve this object, the present invention mixes horizontal and vertical deflection waveforms used for imaging scanning of a subject or deflection scanning on a monitor screen at a predetermined ratio depending on the rotation angle, and then The basic idea is to generate a mixed deflection waveform and a vertical mixed deflection waveform, and furthermore, the center of rotation of the image can be set at any position by adjusting the shift of the horizontal and vertical starting positions after the set rotation.

(Function) According to the configuration of the present invention, an image can be rotated by simple circuit processing of mixing horizontal and vertical deflection waveforms, and an image captured by a microscope camera can be rotated in any direction to display the prefecture. Or it can be displayed on the monitor. In addition, for rotating subjects, a still image can be obtained by scanning the rotational path image based on the rotation detection signal of the subject. Furthermore, by detecting the tilt of the TV camera and deflection scanning based on the rotation angle according to the tilt, the correct camera can be used. Images of the installed state can also be obtained.

(Embodiment) FIG. 1 is a circuit block diagram showing an embodiment of the present invention.

First, the configuration will be described. Reference numeral 1 denotes a vertical deflection waveform generation circuit, which generates a vertical deflection waveform signal in a normal television scanning system. This vertical deflection waveform signal is shown in Figure 2 (a>
The signal waveform is shown in . Incidentally, FIG. 2 is a simplified representation of the deflection waveform for one screen.

2 is a horizontal deflection waveform generating circuit which generates a horizontal deflection waveform signal in a normal television scanning system, and this horizontal deflection waveform signal has the deflection waveform shown in FIG. 2(b).

The outputs of the vertical deflection waveform generation circuit 1 and the horizontal deflection waveform generation circuit 2 are provided to an adder 5 via variable resistors 3a and 3bl, and also to a variable resistor 4a.

4b to adder 6, and adders 5 and 6 mix the two together. That is, the adder 5 adds the vertical deflection waveform signal adjusted by the variable resistor 3a and the horizontal deflection waveform signal adjusted by the variable resistor 3b to create a vertical mixed deflection waveform for image rotation. Further, the adder 6 adds the horizontal deflection waveform signal obtained by adjusting the variable resistor 4a and the vertical deflection waveform signal obtained by adjusting the variable resistor 4b to form a horizontal mixed deflection waveform signal for image rotation. create.

The vertical mixed deflection waveform obtained from the adder 5 is, for example, the deflection waveform shown in FIG. 3(a), and the horizontal mixed deflection waveform obtained from the adder 6 is the deflection waveform shown in FIG. 3(b). Become. Therefore, variable resistors 3a, 3b and 4a,
The mixing ratio of the vertical deflection waveform and horizontal deflection waveform according to 4b is
It will be adjusted as appropriate based on the rotation angle θ of the image. Specifically, the variable resistors 3a, 3b and the variable resistors 4a, 4b are adjusted while the image is displayed on the monitor screen, and the desired image rotation is created while viewing the screen.

The vertical mixed deflection waveform from the caulking device 5 is given to the vertical centering adjustment section 7, and the horizontal mixed deflection waveform from the adder 6 is given to the horizontal centering adjustment section 8. The vertical and horizontal centering adjustment section 7.8 arbitrarily sets, for example, the center of rotation of the image on the monitor screen. For example, for image rotation around the center of the screen, the vertical and horizontal centering adjustment units 7 and 8 output the vertical and horizontal mixed deflection waveforms from the adder 6 as they are,
On the other hand, as for image rotation by an arbitrary rotation center off the center of the screen, as will be explained later, the predetermined image rotation θ is controlled by variable resistors 3a, 3b and 4a, 4b.
After performing the vertical and horizontal centering adjustment parts 7 and 8
Then, the deflection voltage for shifting the rotated image in a predetermined direction is set.

Next, the operation of the embodiment shown in FIG. 1 will be explained.

First, when image rotation is not performed, the variable resistor 3a,
While reducing the resistance value of 4a to zero, variable resistors 3b and 4b
The resistance value of is set as the maximum value, and only the vertical deflection waveform signal from the vertical deflection waveform generation circuit 1 is supplied to the adder 5, and the horizontal deflection waveform signal from the horizontal deflection waveform circuit 2 is supplied to the adder 6. Provides only a signal. Of course, the vertical and horizontal centering adjustment sections 7 and 8 also pass the vertical and horizontal deflection waveform signals from the adders 5 and 6 as they are.

Using the vertical and horizontal deflection waveforms obtained in this manner without performing image rotation, for example, as shown in FIG. If the image deflection scan is performed, since this deflection scan is a normal deflection scan, the 1E monitor image 15 projected on the monitor screen 14 shown in FIG. have the same positional relationship.

Next, when performing image rotation, variable resistors 3a, 3
b is adjusted and the vertical and horizontal negotiation waveform signals are mixed at a predetermined ratio in the adder 5 to produce a vertical mixed deflection waveform as shown in FIG. 3(a).
a and 4b are adjusted to mix the vertical and horizontal deflection waveforms at a predetermined ratio to create a horizontal mixed deflection waveform as shown in FIG. 3(b). Incidentally, since this image rotation is a rotation about the center of the screen, the vertical and horizontal centering adjustment sections 7 and 8 pass the vertical and horizontal mixed deflection waveforms from the adders 5 and 6 as they are.

FIG. 5 (a> is an explanatory diagram showing the deflection scanning of the imaging plane (scanning area>10) in a television camera using the vertical and horizontal mixed deflection waveforms obtained from the adders 5 and 6 of FIG. Since the imaging surface 10 is scanned by the horizontal mixed deflection waveform, vertical and horizontal deflection scanning is performed on the image 12 in a rotation state of a predetermined rotation angle θ. When the video signal obtained by deflection scanning is displayed on a monitor screen, as shown in FIG. Rotation angle θ
The image will be displayed on the monitor rotated by θ in the opposite direction. Of course, the image rotation in this case is the rotation of the image 15 with the screen center of the monitor screen 14 as the rotation center.

Next, image rotation by setting an arbitrary rotation center other than the screen center using the vertical and horizontal centering adjustment units 7 and 8 will be described.

FIG. 6 shows a case where the rotation center of the image does not coincide with the center F of the scanning area 16 of the imaging plane.

Furthermore, il, 1. n2, 13 are parallel and 1. <A=, <B.

Now, rotate the image 12a by θ° with point A as the center of rotation, and fi
The case where the original image is created as 12c will be explained.

θ for 12C of 112a with this point A as the center of rotation
The rotation begins with m1 around the center F of the scanning area 16.
2a is rotated by θ to become 912b, and the image 12b is
By moving parallel to position 12c, the result is θ with point A as the center of rotation.

Deflection scanning of the rotated image 12c is performed.

That is, θ of the starting image 12 with the center F of the scanning area 16 as the center of rotation.
The rotation is performed by the variable resistor 3a shown in FIG.

This can be done by adjusting 3b, 4a, and 4b, so
The vertical and horizontal centering adjustment units 7 and 8 rotate the image 12b by θ° around the center F of the scanning area 16 to 12C.
The voltage of the deflection waveform is adjusted in order to move the deflection waveform in parallel.

Here, the coordinates of the rotation center A are (Xa, Ya), and the scanning area 1
The coordinates of the center F of image 12a are (Xf, Yf), and the center C of image 12a is
The coordinates of the image 12C are (Xc, Yc), the coordinates of the center 1 of the image 612b are (Xh, Yh), and the coordinates of the center of the image 12C are (X
d, Yd), the image 12b rotated by 0° around F
A moving claw for parallelly moving the image 12C to the position of the image 12C is given by the following equation.

Xd-Xh= (Xf-Xa) cosO-(Yf-Ya) sinθ
+(Xa-Yf)...(1) Yd-Yh= (Xf-Xa) sin θ+(Yf-Ya) cosO
+(Ya-Yf)...(2) Therefore, the vertical centering adjustment section 7 in FIG. 1 controls the vertical mixing deflection waveform obtained from the adder 5 based on the equation (1). Also, the horizontal centering adjustment section 8 controls the horizontal mixed deflection waveform obtained from the adder 6 based on the equation (2). Specifically, the horizontal and vertical sweep start points of the vertical mixed deflection waveform and the horizontal mixed deflection waveform are voltage shifted based on the equations (1) and (2).

FIG. 7 is a block diagram showing an embodiment of an apparatus that uses the image rotation apparatus of the present invention to obtain a still image of a rotating object whose rotation speed is relatively low.

In FIG. 7, reference numeral 18 denotes a rotating object with a relatively low rotation speed, and the rotation speed of the rotating object 18 is detected by a rotation sensor 20 and provided to the CPU 22. The rotation sensor 20 detects the rotation of the rotating object 18a with an arbitrary position on the rotating object 18 as the target 18a, and the rotation detection information of the target 18a on the rotating object 18 by the rotation sensor 20 is sent to the CPU 22 at regular intervals, for example. This rotation information of the target 18a is given to the change circuit 24 as image rotation information. The deflection circuit 24 has the circuit configuration shown in FIG. 1, and the variable resistors 3a, 3b and 4a, 4b are variable impedance elements, such as F
ET, etc., and generates a vertical and horizontal mixed deflection waveform according to the rotational position of the target 18a based on rotational information from the CPU 22. The vertical and horizontal mixed deflection waveform based on the rotation information of the target 18a generated by the deflection circuit 24 is supplied to the television camera 26, and since the image of the rotating object 18 is formed on the television camera 26,
Rotation scanning of the scanning area on the image plane following the rotation of the target '18a is performed, and by projecting the video signal obtained from the television camera 26 on the monitor 28, the stationary rotating object 18 is displayed on the screen of the monitor 28. You can get the image.

According to the embodiment shown in FIG. 7, even if the object to be captured is rotating, a still image can always be obtained on the monitor screen. It can be used as Further, in the embodiment shown in FIG. 7, the object to be projected is not limited to a rotating object, but by applying the present invention to a vibrating object, a still image can be obtained even for a vibrating object.

FIG. 8 is an explanatory diagram showing another embodiment using the image rotation device of the present invention. In this embodiment, when the television camera is tilted in a plane perpendicular to the optical axis, The present invention is characterized in that a correct monitor image is obtained by correcting the tilt of the camera.

In FIG. 8, 30 is a television camera, and lens 3
Subject 3 is tilted by α degrees in a plane perpendicular to the optical axis 34 of 2.
8 is @shadowed. If the fflFl image is displayed on the monitor 40 with the tilt α degree as described above, the subject 38 will appear on the screen of the monitor 40 as if it were the TV camera 30.
The image will be tilted by the slope α.

Therefore, in this embodiment, the television camera 30 is provided with a tilt detector 36 for detecting the tilt α, and the tilt detector 36
The tilt α of the TV camera 30 detected by the TV camera 3 is
A mixed vertical and horizontal deflection waveform based on the detected tilt angle α is applied to the image rotation device of the present invention shown in FIG. By displaying the image obtained by scanning the television camera 30 on the monitor television 40, even if the television camera 30 is tilted α, the same image of the subject 38 as when the television camera 30 is installed correctly can be displayed on the monitor 40. can be projected.

Incidentally, as the tilt detector 36 installed in the television camera 30, a weight is suspended from the slider of a rotary potentiometer.
The inclination angle α may be detected by constantly pointing the slider in the vertical direction and by detecting the change in the contact position for one motion resistance of the slider due to the inclination of the television camera 30. Of course, any suitable inclination detector 36 can be used.

In addition, although the above embodiment took the deflection scanning of the image carrying plane of a television camera as an example, the deflection scanning of the television camera is carried out as usual, and when the image is displayed on a monitor television, the deflection by the image rotation device of the present invention is Deflection scanning may be performed using a waveform.

(Effects of the Invention) As described above, according to the present invention, horizontal and vertical deflection waveforms used for @image scanning of a subject or deflection scanning on a monitor screen are mixed at a predetermined ratio according to the rotation angle of the image. to generate a horizontal mixed deflection waveform and a vertical mixed deflection waveform,
Furthermore, since the centering adjustment is performed to set the rotational center not only at the center of the image plane scanning area or the center of the monitor screen but also at an appropriate position, it is possible to easily create a circuit groove by mixing the vertical and horizontal deflection waveforms. It is possible to rotate the image without moving the subject or the camera, for example, when applied to a microscope camera, the subject can be displayed on the monitor in any direction, for example in the horizontal direction (parallel to the horizontal scanning line) with high resolution. ) allows for more precise observation of the subject.

In addition, by image rotation based on the rotation detection information of the rotating object, a still image of the rotating object can be obtained using a fixedly installed television camera, and the situation of the rotating object and the movement of the center of rotation can be appropriately monitored. .

Furthermore, by detecting the inclination angle of the television camera and performing deflection scanning for image rotation, it is possible to always obtain images with the correct orientation even if the television camera is installed incorrectly.

[Brief explanation of the drawing]

Figure 1 is a circuit block diagram showing an embodiment of the present invention, Figure 2 is an explanatory diagram of vertical and horizontal deflection waveforms when image rotation is not performed, and Figure 3 is an illustration of vertical and horizontal deflection waveforms when image rotation is performed. An explanatory diagram of the horizontal deflection waveform (mixed deflection waveform), Fig. 4 is an explanatory diagram showing the scanning state of the imaging plane and monitor screen when image rotation is not performed, and Fig. 5 is an explanatory diagram showing the scanning state of the imaging surface and monitor screen when image rotation is performed. FIG. 6 is an explanatory diagram showing the scanning state of the image plane and the monitor screen. FIG. 6 is an explanatory diagram showing the principle of image rotation using a rotation center off the center of the scanning area of the imaging plane. FIG. 8 is a block diagram showing an example of application, and is an explanatory diagram showing an example of application of the present invention applied to tilt correction of a television camera. 1: Vertical deflection waveform generation circuit 2: Horizontal deflection waveform generation circuit 3a, 3b, 4a, 4b: Variable resistor 5.6: Adder 7: Vertical centering adjustment section 8: Horizontal centering adjustment section 10: ItL@j plane 12: Image 14: Monitor screen 15: Monitor image 16: Scanning area of image plane 18 Two-rotation object 18a: Target 20: Rotation sensor 22: CPU 24: Deflection circuit 26. 30: Television camera 28. 40: Monitor 32: Lens 34: Optical axis 36: Tilt detector 38: Subject

Claims (1)

[Claims] Deflection waveform generating means for generating horizontal and vertical deflection waveforms used for imaging scanning of a subject or deflection scanning on a monitor screen; mixing deflection waveform generating means for generating a horizontal mixed deflection waveform and a vertical mixed deflection waveform for image rotation by mixing them at a predetermined ratio, and a rotation center for arbitrarily setting the rotation center of the image by the mixed deflection waveform generating means. An image rotation device comprising: center setting means.