JPH01109874A - Picture processing controller - Google Patents

Abstract

PURPOSE:To simply process even at the time of changing a magnification by previously storing pattern data corresponding to the magnification of a reference screen in a storage device, reading and comparing the pattern data detected from a camera device and the pattern data of the reference picture of the designated magnification and controlling a zoom lens. CONSTITUTION:After the image of a reference gauge 31 is picked up by a camera 14, a picture signal detected by the camera 14 is converted to a digital signal by an A/D converter 16 and the digital signal is stored in a picture memory 17. The pattern of 1 of 0-255 lines is calculated to obtain the length of a and b. The data of a corresponding ROM 24 is read from the values of a, b according to the magnification by a CPU 26. When the data of magnification m is equal to b, focal point data equal to a in the n focal point data stored in the ROM 24 previously is compared with a. When they are equal, the setting of the data of the magnification m and the data of the n focal point data is completed, the zoom lens 15 is driven by this set value to set the magnification and the focal point.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image processing control device for a camera device equipped with a zoom lens.

In general, the magnification of the optical system is determined by lens 1 as shown in Figure 5.
If the distance from the principal point of the lens to the reference gauge 3 placed on the mounting table 2 is a, and the distance from the principal point of the lens 1 to the imaging surface of the camera 4 mounted on the stage 5 is b, then the optical system magnification is = Represented by □. Therefore, to get the desired magnification.

What is necessary is to change the dimension a or the dimension b.

As a device for obtaining this desired magnification, there is an illumination device 6 for illuminating the reference gauge 3, and a lens 1 and a dimension adjustment knob b for capturing an image of the reference mark 3a of the reference gauge 3 as shown in FIG. 7 attached to a holder 8, a camera 4 with this lens holder 8 attached, a stage 5 that slightly moves the lens l and the camera 4 up and down with the a dimension adjustment knob 9, and a video signal sent from the camera 4 that is converted into digital information. It is composed of an image processing bag [10], a monitor television 11 for viewing images captured by a camera 4, and a microcomputer 2 for controlling an image processing device IO.

In the conventional device configured in this way, the illumination device 6 shines light on the reference gauge 3 having checkered stripes, the lens 1 attached to the tip of the lens holder 8 captures the reference mark 3a of the reference gauge 3, and the lens 1 captures the reference mark 3a of the reference gauge 3. Transfer the captured image to camera 4.
The image is formed on the imaging surface of the
The reference mark is displayed on the screen of the monitor television 11. When the camera 4 is out of focus, the image of the camera 4 is blurred. If there is this blur, turn the a dimension adjustment knob 9 and the b dimension adjustment knob 7 to focus.

Here, the microcomputer 12 has a program means for displaying the optical system magnification in advance, and is configured so that the result can be printed by a printer.

However, in the conventional camera magnification adjustment device configured as described above, the focus of the image displayed on the monitor television 11 is adjusted using the a dimension adjustment knob 9 and the b dimension adjustment knob 7. Therefore, there are problems in that it takes a very long time to obtain the results and it is difficult to accurately adjust the magnification.

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 that changes the focal length with respect to a subject. Pattern data corresponding to the magnification is stored in a storage device in advance, and the pattern data detected by the camera device and the pattern data of the reference image at the designated magnification are read out from the storage device and compared, and the pattern data corresponding to the magnification is adjusted to the designated magnification. It is characterized by controlling a zoom lens of a camera device.

According to the present invention, the size, brightness, and base point data of the reference image corresponding to the magnification are stored in the ROM in advance, and each time the magnification is changed, the reference image and the data in the ROM are compared, and it is determined that they match. A microcomputer controls the focus and aperture magnification of the camera device to capture the correct image.

Figure 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, and data captured by the camera 14 is transferred to an A/D converter. 16, it is converted into a digital signal and stored in the image memory 17. The image data read from the image memory 17 has its respective level set by a slice level setting circuit 18, is converted into an analog signal by a D/A converter 19, and is displayed on a monitor television 20.

On the other hand, the image data read from the image memory 17 is transmitted from the digital interface circuit 21 to the input/output circuit 23 of the microcomputer 22 and stored in the ROM 24 or R
It is stored in AM25. Also, the microcomputer 22
A CPU 26 is provided, and a keyboard 27 is further connected. In addition, the digital interface circuit 2
A lens drive magnification control circuit 28 and a lens drive focus control circuit 29 are connected to 1, and the outputs of these control circuits 28 and 29 are input to the electric zoom lens 15.

Further, a stage 30 is provided below the electric zoom lens 15.
A reference gauge 31 is placed on this stage 30. As shown in FIG. 2, this reference gauge 31 has a reference mark 31a consisting of a cross-shaped reflective section at the center, and a non-reflective section 31b around the reference mark 31a. Furthermore, a lighting device 32 is attached to the side of the camera 14.

Note that FIG. 3 is a diagram showing the field of view of the image captured by the camera 14, and the field of view 33 of the reference gauge 31 is the same as the reference mark 31.
It consists of a portion 33a consisting of image data of 1 of a and a portion 33b consisting of image data of O, where a is the minimum length of the pattern sequence of 1, and b is the length of the maximum pattern sequence of 1.

Next, the operation of the image processing control apparatus of this embodiment will be explained with reference to the flowchart of FIG. First, when you start,
The reference gauge 31 is placed on the stage 30, and the illumination device 32
is turned on, and the motorized zoom lens 15 is adjusted to initialize the camera's magnification to N times (step 1).

Next, after imaging the reference gauge 31 with 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 17. (Step 4). Here, it is determined whether the 255×255 dot format data, which is a collection of image data 1.0 shown in FIG. 3, has been RA-approved (step 5). If no determination is made, return to step 4 and repeat. next,
A pattern of 1 from 0 to 255 lines (rows) is calculated, and the lengths of a and b are determined (step 6). In addition, the CPU 26 of the microcomputer 22 generates a
, reads the data of the ROM 24 corresponding to the value of b (
Step 7).

This data is equal to b among the m magnification data previously stored in the ROM 24 and is compared with b (step 8'
), if m magnification data and b are equal.

Next, among the n focus data stored in the ROM 24 in advance,
Compare those equal to a with a (step 9).

If they are equal, the setting of the 1m magnification data and the n focal point data is completed (step 10), and the zoom lens 15 is driven with this set value (step 11), and the process ends.

If the 1m magnification data becomes equal to b in step 8, it is determined whether the 1m magnification data is greater than b (step 12), and if so, the magnification is too large (step 13).

The magnification is set while comparing the reference screen and b so as to lower the magnification (step 14), and the electric zoom lens 15 is driven according to this set value, and the setting of b is completed.

Further, if the data of the magnification m is smaller than b in step 12, the magnification is set to be larger while comparing the reference plane and b (step 15). The electric zoom lens 15 is driven according to this setting value, and the setting b is completed. Also.

In step 9, it is determined whether the n focal point data is larger than a (step 16), and if it is smaller, it is determined to widen the focal point while comparing it with a of the reference screen (step 17). Furthermore, if the data at focus n is wider than a, the focus is narrowed down (step 18). The electric zoom lens 15 is driven using these setting values a, and the setting in step 7.a is completed.

In this way, by setting the values of a and b, the motorized zoom lens 15 can be driven, and the magnification and focus can be set.

Hello again! As is clear from the above description, the present invention stores data on the size, brightness, and base point of the reference image corresponding to the magnification in the ROM.
The reference image and RO are stored in advance, and each time the magnification is changed, the reference image and RO
By comparing the M data, controlling the focus, aperture, and magnification of the camera device using a microcomputer so that they match, and capturing the correct image, even if the magnification is changed, it can be easily handled. It has the advantage of increasing the number of types of image recognition and having a simple mechanism6.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an image processing control device according to an embodiment of the present invention, Fig. 2 is a plan view of the reference gauge shown in Fig. 1, and Fig. 3 is a view showing the field of view captured by the camera shown in Fig. 1. , FIG. 4 is a flowchart for explaining the operation of the image processing control device shown in FIG. 1, FIG. 5 is a block diagram of a conventional magnification adjustment device of an optical system unit, and FIG. FIG. 14...Camera, 15...Electric zoom lens,
16... A/D converter, 17... Image memory, 18
... slice level setting circuit, 19 ... D/A converter, 20 ... monitor television, 21 ... digital interface circuit, 22 ... microcomputer,
23... Input/output circuit, 24... ROM, 25...
RAM, 26...CPU, 27...Keyboard, 2
8... Lens drive magnification control circuit, 29... Lens drive focus control circuit, 30... Stage, 31... Reference gauge, 31a... Reference mark, 32... Illumination device.

Claims (1)

[Claims] In an image processing control device having a camera device equipped with means for driving a zoom lens that changes the focal length with respect to a subject, pattern data corresponding to the magnification of a reference screen is stored in advance in a storage device, and a pattern detected by the camera device is used. An image processing control device characterized in that the data and the pattern data of the reference image at a designated magnification are read out from a front storage device and compared, and the zoom lens of the camera device is controlled to the designated magnification.