JPH07118783B2 - Image processing controller - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing control device for a camera device having a zoom lens.

2. Description of the Related Art In general, the magnification of an optical system is a lens 1 as shown in FIG.
Let a be the distance from the principal point to the reference gauge 3 placed on the mounting table 2, and b be the distance from the principal point of the lens 1 to the imaging surface of the camera 4 mounted on the stage 5. It is represented by. Therefore, in order to obtain a desired magnification, the size of a or the size of b may be changed.

As a device for obtaining this desired magnification, an illuminating device 6 for applying light to the reference gauge 3 and a lens 1 for taking in an image of the reference mark 3a of the reference gauge 3 as shown in FIG.
And the b dimension adjusting knob 7 are attached to the holder 8, the camera 4 to which the lens holder 8 is attached, the stage 5 for finely moving the lens 1 and the camera 4 up and down by the a dimension adjusting knob 9, and the video signal sent from the camera 4 Image processing apparatus 10 for converting the image into digital information, a monitor television 11 for observing the image projected by the camera 4, and the image processing apparatus 10
And a microcomputer 12 for controlling the.

In the conventional device thus configured, the illumination device 6 irradiates the reference gauge 3 having the lattice stripes with light, and the lens 1 attached to the tip of the lens holder 8 causes the reference mark of the reference gauge 3 to be applied.
3a is taken in, the image taken in by the lens 1 is formed on the image pickup surface of the camera 4, the image signal is processed by the image processing device 10, and the reference mark is displayed on the screen of the monitor television 11. When not in focus, the image of the image of the camera 4 is out of focus. If there is this blur, a Dimension adjustment knob 9
Then, the b-dimension adjusting knob 7 is rotated to bring it into focus. Here, the microcomputer 12 has a program means for expressing the magnification of the optical system in advance, and is configured so that the result can be printed by the printer.

Problems to be Solved by the Invention However, in the conventional camera magnification adjusting device configured as described above, the focus of the image projected on the monitor television 11 is adjusted by the a dimension adjusting knob 9 and the b dimension adjusting knob 7. Therefore, it takes a very long time to obtain the result, and it is difficult to perform accurate magnification adjustment.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an image processing control device having a camera device equipped with a means for driving a zoom lens for varying a focal length with respect to a subject. The pattern data of the size and brightness corresponding to the designated magnification is stored in the storage device in advance so that the size of the pattern data detected by the camera device and the pattern data read by the storage device match. In addition, the camera device is controlled, and as a result, the brightness that changes depending on the magnification is adjusted by the diaphragm to control the zoom lens of the camera device to the designated magnification.

Effect According to the present invention, the pattern data of the size and brightness corresponding to the designated magnification of the reference image is stored in the storage device in advance, and when the magnification is changed, the pattern data actually detected by the camera device and Comparing the size with the pattern data read from the storage device, controlling / adjusting the magnification of the camera device with a microcomputer so that they match, and then adjusting the brightness that changes according to the magnification with a diaphragm. This makes it possible to perform accurate magnification adjustment and capture a correct target image.

Embodiment FIG. 1 is a block diagram of an image processing control device according to an embodiment of the present invention, in which a camera 14 has an electric zoom lens 15,
Data captured by the camera 14 is converted into a digital signal by the A / D converter 16 and stored in the image memory 17. Each level of the image data read from the image memory 17 is set by the slice level setting circuit 18, converted into an analog signal by the D / A converter 19, and displayed on the monitor television 20.

On the other hand, the image data read from the image memory 17 is transferred from the digital interface circuit 21 to the microcomputer.
It is stored in the ROM 24 or the RAM 25 through the input / output circuit 23 of 22. A CPU 26 is provided in the microcomputer 22 and a keyboard 27 is further connected. In addition, the digital interface circuit 21 has a lens drive magnification control circuit.
28 and a lens drive focus control circuit 29 are connected, and the outputs of these control circuits 28, 29 are input to the electric zoom lens 15.

A stage 30 is provided below the electric zoom lens 15, and a reference gauge 31 is mounted on the stage 30. As shown in FIG. 2, the reference gauge 31 is provided with a reference mark 31a formed of a cross-shaped reflecting portion in the center and a non-reflecting portion 31b around the reference mark 31a. Further, a lighting device 32 is attached to the side of the camera 14.

Note that FIG. 3 is a view showing a field of view for capturing an image of the camera 14, in which the field of view 33 of the reference gauge 31 includes a part 33a composed of 1 image data and a part 33b composed of 0 image data of the reference mark 31a. A, the length of the pattern row of the smallest 1
b is the maximum length of one pattern string.

Next, the operation of the image processing control apparatus of this embodiment will be described with reference to the flowchart of FIG. First, when you start
The reference gauge 31 is placed on the stage 30, the illumination device 32 is turned on, the electric zoom lens 15 is adjusted, and the initial setting is performed to set the camera magnification to N times (step 1). Next, after the reference gauge 31 is imaged by the camera 14 (step 2), the image signal detected by the camera 14 is converted into a digital signal by the A / D converter 16 (step 3), and the digital signal is stored in the image memory.
It is stored in 17 (step 4). Here, it is judged whether or not the format data of 255.times.255 dots, which is a collection of the image data 1 and 0 shown in FIG. 3, is recognized (step 5). If not, go back to step 4,
Repeat it. Next, 1 pattern of 0 to 255 lines is calculated to obtain the lengths of a and b (step 6). Further, the CPU 26 of the microcomputer 22 reads the data of the corresponding ROM 24 from the values of a and b according to the magnification (step 7). This data is ROM24 beforehand
Among the m-magnification data stored in
(Step 8). If the m-magnification data and b are equal, then n-focus data stored in advance in the ROM 24 and equal to a are compared with a (step 9). If this is the same, the setting of the m magnification data and the n focus data is completed (step 10), and the zoom lens is set with this setting value.
Drive 15 (step 11) and end.

In step 8, if the m-magnification data is equal to b, it is judged whether the m-magnification data is larger than b (step 12). If the m-magnification data is larger than b (step 13), the magnification is too large. The magnification is set while comparing the reference screen and b so as to lower it (step 14), and the electric zoom lens 15 is driven by this set value to set b.
Finish the setting of. If the m-magnification data is smaller than b in step 12, the reference surface and b are set so as to increase the magnification while being compared (step 15). The electric zoom lens 15 is driven by this set value, and the setting of b is completed. Further, in step 9, it is judged whether or not the n-focus data is larger than a (step 1
6) If it is smaller, it is judged to widen the focus while comparing with a of the reference screen (step 17). If the data of n focus is wider than a, the focus is narrowed down (step 1
8). The motorized zoom lens 1 according to these set values a
Drive 5 to complete the setting of a.

In this way, the values of a and b can be set to drive the electric zoom lens 15, and the magnification and focus can be set. By performing accurate magnification and focusing as described above, it is possible to measure the image projected by the camera 4 on a proper screen regardless of whether the subject is small or large, so that a correct target image can be captured. it can.

EFFECTS OF THE INVENTION As is apparent from the above description, the present invention provides an image processing control device having a camera device including means for driving a zoom lens that varies a focal length with respect to a subject,
Pattern data of a size / brightness corresponding to the designated magnification of the reference image is stored in the storage device in advance, and the size of the pattern data detected by the camera device and the pattern data read by the storage device is stored. By comparing and controlling the magnification of the camera device with the microcomputer so that they match, and then adjusting the brightness that changes with the magnification with the diaphragm, the zoom lens of the camera device is controlled to the designated magnification. Then, since it is possible to capture an image having a size and brightness corresponding to the accurate magnification, the measurement accuracy is improved. Further, there is an advantage that even if the number of types of image recognition increases and the magnification is changed, it is possible to easily cope with it and the work becomes easy.

[Brief description of drawings]

FIG. 1 is a block diagram of an image processing control apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of the reference gauge of FIG. 1, and FIG. 3 is a view showing a field of view captured by the camera of FIG. 4, FIG. 4 is a flow chart for explaining the operation of the image processing control device of FIG. 1, FIG. 5 is a block diagram of a magnification adjusting device of a conventional optical system unit, and FIG. 6 is a reference gauge of FIG. It is a top view. 14 …… Camera, 15 …… Electric zoom lens, 16 …… A /
D converter, 17 ... Image memory, 18 ... Slice level setting circuit, 19 ... D / A converter, 20 ... Monitor TV, 21 ...
… Digital interface circuit, 22 …… Microcomputer, 23 …… Input / output circuit, 24 …… ROM, 25 …… RAM,
26 …… CPU, 27 …… Keyboard, 28 …… Lens drive magnification control circuit, 29 …… Lens drive focus control circuit, 30 …… Stage, 31 …… Reference gauge, 31a …… Reference mark, 32 ……
Lighting equipment.

Claims (1)

[Claims] 1. An image processing control device having a camera device having means for driving a zoom lens for varying a focal length with respect to a subject, wherein pattern data of a size / brightness corresponding to a designated magnification of a reference image is provided. The camera device is controlled so that the size of the pattern data detected by the camera device and the pattern data read by the memory device are stored in advance in the storage device, and as a result, the brightness that changes depending on the magnification. An image processing control device, wherein the zoom lens of the camera device is controlled to a designated magnification by adjusting the height by a diaphragm.