JPS60194302A - Measuring apparatus for object to be photographed - Google Patents

Abstract

PURPOSE:To achieve a higher efficiency of the calculation processing by obtaining a position signal for digitally expressing the position when electronically specified for given measuring points on a pickup screen to compute the dimensions and distance. CONSTITUTION:A solid-state camera 2 which takes the picture of an object 1 is made up of an optical system 21, a CCD image sensor 22, a signal processing section and the like. An image display 3 indicates an image output signal of the camera 2. A position specifying device 4 generates a cursor pulse signal to specify X and Y coordinate positions for a desired measuring point on the display screen of the image display 3 and synthesizes the signal and the image output signal to feed as video input of the image display 3 while outputs a digital position signal for expressing the coordinate position. An arithmetic unit 5 receives position signals for two measuring points on the display screen from the position specifying device 4 to calculate the distance between the measuring points while correcting the scale ratio.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is used in a microscope camera device, an aerial camera device, etc., and is used to electronically measure the length between arbitrary single points on an imaging screen to detect a subject. This invention relates to an object measuring device for measuring the actual size and distance between two points.

[Technical background of the invention and its problems]

In conventional microscope camera devices and aerial camera devices, the distance between two points on a photograph obtained by two cameras is measured with a ruler, and this measured value is adjusted according to the imaging magnification or scale factor. By performing correction calculations, the actual dimensions and distance between two points were determined.

However, performing two-point measurement after converting the subject image into a photographic record in this way has the disadvantage that the conversion requires labor and time, and that error factors intervene, resulting in a decrease in measurement accuracy. . Furthermore, the measurement operation using a ruler as described above requires an additional data input operation for computation of correction of the measurement results, and therefore measurement processing cannot be performed in real time.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and is an object measurement method that can easily and accurately measure the length between two predetermined points on an imaging screen, and can perform correction calculations for the measurement results in real time. It provides equipment.

[Summary of the invention]

That is, the object measuring device of the present invention includes an imaging camera that images an object and outputs an image signal, and an image display that displays the output signal of the imaging camera.

a position specifying means for specifying the positions of at least two desired points on the display screen of the image display device and generating a position signal digitally representing the specified position on the display screen; This calculation has the function of calculating the length between the specified positions on the display screen and performing correction calculations to determine the actual size and distance between two points corresponding to the specified positions in the subject. Having the device = h% sign.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a subject; 2 denotes, for example, a solid-state image camera for imaging the subject 1; an optical system 21;
It consists of a CD (charge coupled device) imaging device 22, a signal processing section, and the like. 3 is an image display using, for example, a cathode ray tube (CRT) for displaying the image output signal of the camera 2; 4 is a designation for specifying the X and Y coordinate position of an arbitrary measurement point on the display screen of the image display 3; A cursor pulse signal is generated for the image display 3, and the cursor pulse signal and the mI image output signal are combined to output the video input of the image display 3 and 1. This is a position specifying device that supplies a digital position signal and outputs a digital position signal representing the coordinate position. , 5 is the position specifying device 4
The length between the two measurement points is calculated by receiving the position signals of the two measurement points on the display screen, and the calculation result is applied to a magnification or scale that is separately set in relation to the magnification of the optical system of the camera 22. This is an arithmetic device that calculates the dimensions and distance between the actual measurement points of the subject 1 by calculating the rate correction.

The CCD imaging device 22 has photosensitive pixels Pxt-Pmn arranged in a two-dimensional grid as shown in FIG. The clock pulses are read out and driven from the clock pulse generation circuit 24 in synchronization with the synchronization pulses, and each signal is read out from the pixels pH to Pan in the first row in the horizontal direction to the pixels Pml to Pmn in the mth row (last row). are read out in chronological order as shown in FIG. In response to this signal, the position specifying device 4 outputs a cursor signal and a Luz signal for one sea bream at any desired timing based on the setting input from the outside within one screen period in synchronization with the drive clock of the CCD camera 12°. A cursor pulse generation circuit 41 that generates Pc, a cursor synthesis circuit 42 that superimposes the cursor pulse signal Pa on the output signal of the camera 2 and provides it as a display input of the image display 3, and a screen of the camera 2. Equipped with a counting circuit 4s that counts clock pulses from the start of scanning to generation of the cursor pulse signal and outputs a position signal digitally representing the generation position of the cursor pulse signal Pc within one screen based on an external command input. are doing.

The image display device 2 receives a display signal from the cursor synthesis circuit 42 of the position specifying device 4 and displays it in an XY constant scan manner. Therefore, as shown in FIG. 4, the coordinate position on the display screen in the horizontal direction is H1=Hn,
If the vertical direction is expressed by dividing v1 to VmK, then (VIHI) to (Vtun) # = (VmH
l) ~ (VmHn) was removed from the pi surface the previous day p--,-,D
-----,. −−0 hell −−corresponds to the first position.

In the object measuring device having the above configuration, the pixel signal (for example, PHn) on which the force pulse signal Pc is superimposed is
Since the brightness of the display position (VI Hn) on the screen is increased by the cursor pulse signal, the position on the screen can be specified by the cursor pulse signal. therefore,
While watching the screen, set the cursor pulse generation timing to move the cursor display over the desired measurement point, and
It is a simple operation that only requires outputting a position signal for two measuring points at the time of setting.
The process of measuring the length between the measurement points is immediately and accurately performed automatically, and correction calculations for calculating actual dimensions and distances are performed in real time from the measurement results.

In addition, if the arithmetic unit 9 is set to be able to calculate the area based on the length measurement results, by specifying three or more measurement points, it is possible to actually calculate the area obtained by consecutively connecting each specified point. The dimensions, distance, and area of the outer periphery of can be calculated.

Note that instead of the cursor i4 pulse generating circuit 41 of the position specifying device 4, a light pen is used to specify a predetermined point on the display screen, and a position signal representing the position of the detection pulse generated by the light pen is sent to the counting circuit 43. It's okay to be busy so that you can make the most of it. In this case, the cursor synthesis circuit 42 is unnecessary and the output signal of the camera 2 is sent to the image display 3.
The display input can be made as follows.

〔Effect of the invention〕

As described above, the object measuring device of the present invention electronically specifies the position of a predetermined measurement point on the imaging screen and generates a position signal that digitally represents the position.
Compared to conventional measurements using photographic records and rulers, electronic measurements can be performed easily and accurately in a shorter time. Since correction calculations for determining the actual size and distance between two points of the object are performed based on the position signals, real-time processing is possible, which greatly contributes to improving the efficiency of measurement processing.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing an embodiment of the object measuring device of the present invention, FIG. 2 is a diagram showing a photosensitive pixel arrangement of the CCD imaging device in FIG. 1, and FIG. 3 is a diagram showing the CCD imaging device in FIG. 2. A timing diagram showing an example of the imaging output signal of FIG.
It is a figure for showing the coordinate position on the display screen of the image display device in a figure. DESCRIPTION OF SYMBOLS 1... Subject, 2... Solid-state imaging camera, 2... Image display device, 4... Position specifying device, 6... Arithmetic device. Figure 1 Figure 3

Claims (1)

[Claims] α) An imaging camera that images a subject and outputs an image signal, and an image display that displays the output signal of the imaging camera 2;
Display screen 1 of this image display; a position specifying means for specifying the positions of at least two desired points on the main contact and generating a position signal digitally representing the specified position on the display screen; It has the function of guiding the generated position signal, calculating the length between specified positions on the display screen, and performing correction calculations to determine the actual size and distance between two points corresponding to the specified positions in the subject. 1. A subject measuring device comprising: a calculation device. (2) The arithmetic device is further equipped with a function of calculating the actual area of the area surrounded by the specified positions when position signals associated with three or more specified positions are derived. An object measuring device described in Patent No. 1. (3) The object measuring device according to claim 1, wherein the imaging camera uses a C'CD imaging device.