KR101333160B1 - Method of processing image based on confocal and apparatus performing the same - Google Patents

Abstract

The present invention discloses an image processing method using a confocal and an apparatus for executing the same. An apparatus for implementing an image processing method using confocals includes a lens receiving light from at least two light source units, a light source having a focal plane at different positions after being refracted through the lens from at least two light source units, A measurement object to which the light refracted through the lens is irradiated, a measurement object moving unit which moves the position of the measurement object, and the measurement object is moved according to the driving time of the measurement object moving unit, And an image processing control unit for detecting whether the measurement object arrives, and a measurement object moving control unit controlling the moving speed of the measurement object moving unit according to the detection result of the image processing control unit. Therefore, it is possible to detect focal planes formed at different positions according to chromatic aberration, and control the movement speed of the position of the measurement object to which light is irradiated according to the detection result.

Description

Image processing method using confocal and a device for executing the same {METHOD OF PROCESSING IMAGE BASED ON CONFOCAL AND APPARATUS PERFORMING THE SAME}

The present invention relates to an image processing apparatus and method, and more particularly, to an image processing apparatus and method using a confocal for processing an image using chromatic aberration.

Recently, with the expansion of digital cameras, the consumer's desire for high performance cameras is increasing. As a representative example of high performance, a camera module having a high resolution and an auto focus function of the camera module may be mentioned. For example, there is a miniature camera module of an inner zoom type having a zoom lens and a focus lens together.

One such focusing technique is confocal. Confocal is a technique that adjusts the focus by removing light out of focus from the laser and passing the light out of focus. An image processing apparatus using such a confocal technique is a confocal image processing apparatus.

The confocal image processing device is a laser as a light source, and passes only the light that matches the focus among the light emitted from the laser, and generates an image using an optical signal corresponding to the light that matches the focus.

Korean Patent Laid-Open Publication No. 10-2004-0036079 relates to an improved method of adjusting auto focus in a video camera, and to detect a focus value by moving a predetermined step in a predetermined direction with respect to a focus lens, and to determine whether or not the detected focus value is decreased. Accordingly, the present invention provides a method of adjusting focus using previous image data.

Korean Laid-Open Patent Publication No. 10-2003-0023889 relates to a three-dimensional display display apparatus using a variable focus lens array, wherein a basic image is obtained when the distance between the variable focus lens array and the display element is fixed and the focus of the variable focus lens array is changed. The present invention provides a device capable of displaying a three-dimensional display in synchronization with the devices.

These techniques require the object to be measured to be moved to the focus area in order to measure using confocal. However, since the width of most of the focusing areas is very small, it takes a long time to move the measurement object to the focusing area.

In addition, if the image is processed by confocal outside the focus area, there is a problem that the image processing takes much time.

The present application provides a confocal image processing apparatus and method for processing a confocal image using chromatic aberration.

To this end, the present application provides a focal plane formed at different positions according to chromatic aberration to provide a criterion for quickly moving a measurement object to a focus area, and utilizes these focal planes to control the movement of the measurement object. A focus image processing apparatus and method are provided.

In addition, the present application provides a confocal image processing apparatus and method that can minimize the entire confocal image processing time by performing the image processing by the confocal only in the focus area.

Among the embodiments, an image processing apparatus using a confocal may include a lens that receives light from at least two light source units, a light source having a focal plane at different positions after being refracted through the lens from at least two light source units, A measurement object to which the light refracted by the lens is irradiated, a measurement object moving unit which moves the position of the measurement object, and the measurement object is moved according to the driving time of the measurement object moving unit, and the ultra-preferred plane refracted through the lens And an image processing control unit for detecting whether the measurement object arrives and a measurement object moving control unit for controlling a moving speed of the measurement object moving unit according to a detection result of the image processing control unit.

The moving object may measure the moving speed of the measuring object when the moving object reaches the position where the first focal plane exists as a result of the detection of the image processing controller. In another embodiment, when the measurement object movement control unit reaches the position where the last focal plane exists as a result of the detection of the image processing controller while moving the measurement object, the measurement object movement control unit may increase the movement speed of the measurement object. The apparatus may further include an image processor configured to process an image by confocal by applying image data acquired through the image acquisition unit in a section in which the first focal plane is located from the position of the first focal plane.

In at least one example embodiment, the two or more light sources may have different wavelengths, and light sources passing through the lens due to different wavelengths may have different focal planes due to chromatic aberration of the lens.

Among the embodiments, an image processing method performed in an image processing apparatus using confocals may include: delivering two or more light sources to a lens, receiving a light from at least two light sources, and passing through the lens. The light source forms a focal plane at different positions, the light refracted through the lens is irradiated to the measurement object, and the moving object moves to the position of the measurement object, and the image processing controller passes through the lens. Detecting whether the measurement object reaches a focal plane existing at different positions; and controlling the moving speed of the measurement object moving unit according to the detection result.

The controlling of the moving speed of the measuring object moving unit may include moving the measuring object and reducing the moving speed of the measuring object when the first focal plane is present as a result of the detection of the image processing controller. You can. In another exemplary embodiment, the controlling of the moving speed of the measuring object moving part may include moving the measuring object and adjusting the moving speed of the measuring object when the final focus plane is reached as a result of the detection of the image processing controller. Can be increased. The method may further include the step of processing the image by confocal through the image data acquired by the image acquisition unit in the section in which the first focal plane is located from the position of the first focal plane.

In at least one example embodiment, the two or more light sources may have different wavelengths, and light sources passing through the lens due to different wavelengths may have different focal planes due to chromatic aberration of the lens.

The present application can process a confocal image using chromatic aberration.

The present application can detect a focal plane formed at different positions according to chromatic aberration, and control the movement speed of the position of the measurement object to which light is irradiated according to the detection result.

The present application may generate an image by using an optical signal corresponding to light corresponding to a focus.

1 is a diagram illustrating a configuration of an image processing apparatus using a general confocal.
2 is a diagram illustrating a configuration of an image processing apparatus using confocal according to the present invention.
3 is a view for explaining another embodiment of an image processing apparatus using confocal according to the present invention.
4 is a diagram illustrating types of light provided by at least one light source unit of FIG. 2.
FIG. 5 is a diagram illustrating wavelengths according to types of light in FIG. 4.
6 is a flowchart illustrating an execution process of an image processing apparatus using the confocal in FIG. 2.
FIG. 7 is a diagram illustrating an execution process of the image processing apparatus using the confocal in FIG. 6.
FIG. 8 is a diagram illustrating an image acquisition unit in FIG. 2.
FIG. 9 is a graph illustrating a focal plane of a predetermined diode of the image acquisition unit of FIG. 8.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a configuration of an image processing apparatus using a general confocal.

Referring to FIG. 1, an image processing apparatus 100 using confocals includes a light source unit 110, a beam splitter 120, a lens 130, a measurement object 140, a measurement object moving unit 150, and an image acquisition unit. 160, an image processing control unit 170, and a measurement object moving control unit 180.

The light source unit 110 provides light irradiated to the measurement object 140. This light is a laser beam that combines several wavelengths. Light provided from the light source unit 110 is transmitted to the beam splitter 120.

The beam splitter 120 converts the light transmitted from the light source unit 110 into a parallel beam and transmits the light to the lens 130. The lens 130 refracts the light to form a focal plane, and the light is transmitted to the measurement object 140. To pass. Such light is refracted by the lens 130 to form a focal plane at different positions from the lens while these lights are irradiated onto the measurement object 140. The light irradiated to the measurement object 140 through this process is reflected and transmitted to the image acquisition unit 160 through the beam splitter 120.

The measurement object 140 indicates a measurement object for generating the captured image data, and the measurement object 140 may be moved by the measurement object moving unit 150. In one embodiment, the measurement object moving unit 150 may move the measurement object 140 according to a command of the image processing controller 170. For example, the measurement object moving unit 150 may move the measurement object at a speed of 30 msec on average. Since the moving speed of the measurement object moving unit 150 is very slow, it takes a lot of time to reach the focus area for measuring by using the confocal.

The image acquisition unit 160 is connected to the image processing control unit 170, and starts, ends, and transmits the captured image data by the image processing command by the image processing control unit 170. The image processing controller 170 is connected to the image acquisition unit 160 and the measurement object movement control unit 180. The image processing controller 170 is an apparatus for controlling the image processing apparatus 100 for confocal. The image processing controller 170 receives the captured image data from the image acquisition unit 160 and displays it on a monitor (not shown) or moves a measurement object. Sends a command for the movement of the measurement object moving unit 150 to 180.

The measurement object moving control unit 180 is connected to the image processing control unit 170 and transmits a driving command to the measurement object moving unit 150 according to the command of the image processing control unit 170. The measurement object moving controller 180 may control the position of the measurement object 140 by driving the measurement object moving unit 150 to reach the measurement object 140 in the focal region. However, since the movement of the measurement object 140 is very slow, a long time is required for focusing.

2 is a diagram illustrating a configuration of an image processing apparatus using confocal according to the present invention.

Referring to FIG. 2, the image processing apparatus 200 using confocals includes a light source unit 210, a beam splitter 220, a lens 230, a measurement object 240, a measurement object moving unit 250, and an image acquisition unit. 260, an image processing controller 270, and a measurement object movement controller 280.

The light source unit 210 includes at least two light source units 211 and 213. At least two or more light source units 211 and 213 provide light irradiated to the measurement object 240. In one embodiment, the at least two light source units 211 and 213 may provide different kinds of light. Such light may have different wavelengths according to the types of at least two light source units 211 and 213.

In one embodiment, the light may be irradiated to the measurement object 240 while forming a focal plane at different positions according to the wavelength. For example, the red light of the visible light forms the focal plane in front of the light of another color (for example, yellow light) (meaning that the distance is shorter with respect to the center point of the lens), and the measurement object 240 Can be investigated. In another example, the violet light of the visible light forms the focal plane behind the other color light (for example, green light) (meaning that the distance is far from the center point of the lens). Can be investigated).

Beam splitter 220 includes at least one beam splitter 221, 223. The at least one beam splitter 221, 223 converts the light transmitted from the at least one light source unit 211, 213 into a parallel beam and transmits the light to the measurement object 240. Such light is irradiated to the measurement object 240 by forming a focal plane at different positions by the lens 230. In one embodiment, since the lens 230 refracts the light differently according to the respective wavelengths, the focal planes are generated at different positions, and the light is irradiated onto the measurement target 240.

While the focal planes are formed at different positions according to the wavelength of light, these focal planes may be formed to be spaced apart from the measurement object by a predetermined distance when the measurement objects are positioned at a predetermined position. In one embodiment, the focal plane may be located near or far from the measurement object 240 according to the type of light (type of wavelength). For example, the focal plane may be formed far from the measurement object 240 when the wavelength of light is large. For another example, the focal plane may be formed near the measurement object 240 when the wavelength of light is small. The position of the focal plane may be closer or further away from the measurement object 240 according to the movement of the measurement object moving part 250.

Here, referring to the light source unit 210 and the beam splitter 220 according to an embodiment, as shown in FIG. 2, the light source unit 210 is composed of two, and each light source unit is indicated by 211 and 213.

Each of the light source parts 211 and 213 are provided at different positions, and the beam splitter 220 is provided to correspond to each light source part.

In other words, any one beam splitter 220 is provided to irradiate light from one light source unit 211 to the lens 230, and irradiate light from the other light source unit 213 to the lens 230. Another beam splitter 220 is provided for.

Accordingly, the light is irradiated onto the lens 230 by the respective beam splitters 220 at the light source units 211 and 213 having different incidence angles, and the irradiated light forms the focal plane at different positions. It can be.

Meanwhile, as shown in FIG. 3, the light source unit 210 includes two light sources 210, denoted by 211 and 213, and includes one beam splitter 220.

The two light sources 211 and 213 are provided to irradiate light with one beam splitter 220, and each of the two light sources 211 and 213 may be provided at different positions or concentric circles to irradiate light.

Accordingly, the light is irradiated onto the lens 230 by the respective beam splitters 220 at the light source units 211 and 213 having different incidence angles, and the irradiated light forms the focal plane at different positions. It can be.

Here, the focal plane means that the light passing through the lens forms a focal point at a distance away from the lens. The focal plane includes a focal plane in which the lines drawn in a direction parallel to the longitudinal direction of the lens, including the focal point, are called focal planes.

The measurement object 240 indicates a measurement object for generating captured image data, and the measurement object 240 may be moved by the measurement object moving unit 250. In one embodiment, the measurement object moving unit 250 may move the measurement object 240 according to a command of the image processing controller 270. In another embodiment, the moving speed of the measurement object moving unit 250 may vary according to a command of the image processing control unit 270. For example, when the image processing controller 270 detects a focal plane of light, the measurement object moving unit 250 may slowly move the measurement object 240. For another example, if the image processing controller 270 does not detect a focal plane of light, the measurement object moving unit 250 may move the measurement object 240 quickly.

The image acquisition unit 260 is connected to the image processing control unit 270. The image acquisition unit 260 converts light into an electric signal by a command of the image processing control unit 270 and transmits the light to the image processing control unit 270.

The image processing controller 270 is connected to the image acquisition unit 260 and the measurement object movement control unit 280. The image processing controller 170 is a device for controlling the confocal image processing apparatus 100. The image processing controller 170 receives the captured image data from the image acquisition unit 260 and displays the image data on a monitor (not shown) or moves the measurement object movement controller 280. ) Transmits a command for the movement of the measurement object moving unit 250.

The measurement object moving control unit 280 is connected to the image processing control unit 270 and transmits a driving command to the measurement object moving unit 250 according to the command of the image processing control unit 270. The measurement object movement controller 280 may control the position of the measurement object 240 by driving the measurement object movement unit 250 according to a command of the image processing controller 270. In one embodiment, the image processing controller 270 may move the measurement object moving unit 250 up and down depending on whether the focus is adjusted.

The measurement object movement controller 280 may control the movement speed of the measurement object 240 according to a command of the image processing controller 270. In one embodiment, when the measurement object moving control unit 280 reaches the position where the first focal plane exists while moving the measurement object 240, the measurement object 240 may reduce the moving speed of the measurement object 240. In another embodiment, when the measurement object moving control unit 280 reaches the position where the final focal plane exists while moving the measurement object 240, the measurement object 240 may increase the moving speed of the measurement object 240.

The image processing controller 270 detects whether a focal plane of light exists. According to an exemplary embodiment, the image processing controller 270 may compare the value of each pixel of the captured image data generated by the image acquisition unit 260 to determine whether it matches the focus. For example, the image processing controller 270 may compare pixel values of neighboring pixels among the plurality of pixels, and determine whether they match the focus if they are similar. This is illustrated in FIGS. 7 and 8.

In general, light has a different degree of refraction through the lens 230 according to the wavelength (chromatic aberration), and the refracted light forms a focal point at a position spaced apart from the lens 230 by a predetermined distance while reaching the measurement object 240. Can be. For example, light of long wavelengths near red is focused at a distance far from the lens 230, and light of short wavelengths near red is focused at a distance near the lens 230. As described above, the focal plane, which is a plane including these focal points, checks when the smallest point (spot) that light can form is formed, and the image processing controller 270 determines the position where such small point (spot) exists. Detect.

If so, the image processing controller 270 causes the measurement object moving controller 280 to reduce the moving speed of the measurement object moving unit 250. If not, the image processing controller 270 causes the measurement object moving controller 280 to increase the moving speed of the measurement object moving unit 250.

In addition, the image processing controller 270 may perform an image by confocal through the image data acquired by the image acquisition unit 260 in the section where the measurement object 240 is located from the position of the first focus plane to the position of the last focus plane. Process.

To explain this more,

When light having two or more wavelengths is incident and refracted through a lens, chromatic aberration occurs in the lens according to the wavelength of the light, and thus the focal length is different. Here, the focal planes including the point where the focal point is generated are generated at different positions from the lens. If the object is moved upward from the bottom of the lens, the focal plane and the measurement generated at the position farthest from the lens are measured. The object meets for the first time and is called the first focal plane.

In addition, when the measurement object moves upward, it finally meets the focal plane that exists closest to the lens, which is called the final focal plane.

If you use a light source with two wavelengths, there will be only the first and last focal planes. If you use a light source with three wavelengths, there is another focal plane between the first and last focal planes.

At this time, the moving object moves quickly while detecting the focus plane until it meets the first focal plane when moving from the bottom to the top. Confocal work is performed through the confocal image processing when the final focal plane is encountered.

That is, by applying the first focal plane and the last focal plane as the moving reference point of the measurement object, it is possible to quickly perform the measurement through the confocal point.

4 is a diagram illustrating a kind of light provided by at least one light source unit in FIG. 2, and FIG. 5 is a diagram illustrating a wavelength according to the kind of light in FIG. 4.

4 and 5, light is classified according to wavelength. Light may be divided into an infrared ray 310, a visible ray 320, and an ultraviolet ray 330 according to a wavelength.

Visible light 320 of the light region is composed of a variety of light spectrum from red to purple. The wavelength of light constituting the spectrum is different, and the refractive index is different depending on the wavelength of light. The red light at the far left of the spectrum is longer than the violet light at the far right of the spectrum. In other words, the wavelength of light becomes longer depending on the kind of color disposed from the left to the right of the spectrum.

The length of the frequency wavelength of the visible light 320 is between 380 nm and 750 nm 340 in the entire frequency range. For example, the wavelength of red light is 620-750 nm. When the light enters a predetermined medium, the traveling direction is changed. For example, light is transmitted in parallel to the lens 230, and when passed through the lens 230, the light is bent by the refraction and collected into focus.

The degree of refraction of light depends on the characteristics and wavelength of the medium. The shorter the wavelength of light, the greater the refraction of light. Chromatic aberration occurs because the refractive index is different for each wavelength of light. That is, chromatic aberration is an aberration caused by a difference in refractive index according to the wavelength of light. The light having a long wavelength passes through the lens 230 and focuses farther from the lens 230 than other lights. For example, light of a long wavelength close to red may be focused far from the lens 230, and light of a short wavelength close to purple may be focused near the lens 230.

The image processing method using the image processing apparatus 200 using the confocal method may include transmitting two or more light sources to the lens, receiving the light from at least two light source units, and different light sources passing through the lens. Forming a focal plane at the position, irradiating light to the measuring object through the lens, moving the measuring object to move the position of the measuring object, and the image processing controller passes through the lens and is located at different positions Detecting whether the measurement object reaches a plane, and controlling the movement speed of the measurement object moving unit according to the detection result.

Looking at the image processing method performed in the image processing apparatus using the confocal in more detail, as shown in Figures 6 to 7.

First, in FIG. 6, the light source unit 210 provides light 510, 520, and 530 irradiated to the measurement object 240 (step 510). The beam splitter 220 receives the light 510, 520, 530 from the light source and converts the light into parallel beams (S520). The lens 230 receives the light 510, 520, 530 converted from the beam splitter 220 (step 520). The transmitted light 510, 520, 530 has a focal plane 511, 521, 531 at different locations after being refracted according to the wavelength of light.

The light 510, 520, 530 reflected from the measurement object 240 is transmitted to the image acquisition unit 260 through the lens 230 (step 530). The image acquisition unit 260 converts the light 510, 520, 530 arriving through the lens 230 into an electrical signal and transmits the signal to the image processing control unit 270, and the image processing control unit 270 receives the light 510, 520. 530 detects whether at least one focal plane 511, 521, 531 exists (step 540). The measurement object moving control unit 280 may reduce the speed at which the measurement object moving unit 280 moves (step 550), if so (step 550). According to an embodiment, the image processing controller 270 may move the measurement object 240 and reduce the moving speed of the measurement object 240 when the first focal plane 511 is reached. In another embodiment, the image processing controller 270 moves the measurement object 240 and decreases the moving speed of the measurement object 240 when the final focal plane 531 arrives at the position. If not, the measurement object moving controller 280 may increase the speed at which the measurement object moving unit 280 moves (step 560).

In one embodiment, the image processing controller 270 may move the measurement object moving unit 280 up and down to detect whether the focal planes 511, 521, and 531 exist. For example, if the image processing controller 270 detects the first focal plane 521 while moving the measurement object 240, the image processing controller 270 moves the measurement object moving part 280 up and down to detect the second focal plane 521. Can be moved to In one embodiment, the vertical movement of the measurement object moving unit 280 may be determined based on the following [Table 1].

[Table 1]

Table 1 shows the change of the light (510, 520, 530) in accordance with the movement of the measurement object 240. When the measurement object 240 is moved upward from the current position, the size of the focal plane of the red light 510 becomes smaller, the size of the focal plane of the green light 520 becomes larger, and the focal plane of the blue light 530. It means that the size of. In addition, when the measurement object 240 is moved downward from the current position, the size of the focal plane of the red light 510 increases, the size of the focal plane of the green light 520 increases, and the focus of the blue light 530. The size of the plane becomes smaller.

If the first focal plane (for example, the focal plane of the red light 521) is detected at the current position of the measurement object 240, the image processing controller 270 may measure the measurement object 240 based on [Table 1]. Moving downward may determine that there is a second focal plane (eg, the focal plane of blue light 530).

FIG. 8 is a diagram illustrating an image acquisition unit in FIG. 2, and FIG. 8 is graphs illustrating a focal plane of a predetermined diode of the image acquisition unit in FIG. 7.

8 and 9, the image acquisition unit 260 is a photoelectric changer that converts light into an optical signal to generate captured image data. In one embodiment, the image acquisition unit 260 may be implemented as a charge coupled device (CCD). The image acquisition unit 260 is composed of a plurality of photo diodes (N * N), the plurality of photo diodes respectively receive light, and then determine the brightness according to the amount of electrons of the corresponding photodiode to capture the captured image data Create

The image acquisition unit 260 may transfer the captured image data to the image processing controller 270, and the image processing controller 270 may determine whether the focus is matched using the captured image data. In an embodiment, the image processing control unit 270 may compare pixel values between neighboring pixels among the plurality of pixels constituting the captured image data, and if so, determine that the focus is the same. If not, the image processing controller 270 may determine that the focus does not match. Each focal position 710, 720 of the plurality of pixels is as shown in the graph in FIG. 9.

110, 210: light source 120, 220: beam splitter
130, 230: lens 140, 240: measurement object
150, 250: measuring object moving unit 160, 260: image acquisition unit
170, 270: image processing control unit 180, 280: measurement object moving control unit

Claims (10)

In the image processing apparatus using confocal,
A lens receiving light from at least two light sources;
A light source having a characteristic of having a focal plane at different positions after being refracted through the lens from two or more light sources;
A measurement object to which light refracted through the lens is irradiated;
A measurement object moving unit which moves a position of the measurement object;
An image acquisition unit for detecting whether the measurement object is moved by the measurement object moving unit and the measurement object reaches a focal plane refracted through the lens;
An image processing controller configured to process an image due to confocal by applying image data acquired through an image acquisition unit in a section in which the measurement object is located at the last focal plane from a position of a first focal plane; And
Confocal image processing apparatus including a measurement object movement control unit for controlling the moving speed of the measurement object moving unit according to the detection result of the image acquisition unit. The method of claim 1, wherein the measurement object movement control unit,
When the image processing controller detects the movement of the measurement object and reaches a position where the first focal plane corresponding to the focal position closest to the lens exists, the moving speed of the measurement object is reduced. Image processing device. The method of claim 1, wherein the measurement object movement control unit,
When the image processing controller detects the moving object while the final focus plane corresponding to the focal point farthest from the lens is reached, the moving speed of the measurement object is increased. Image processing device. delete The method of claim 1,
The at least two light sources have different wavelengths, and the light source passing through the lens due to different wavelengths has a focal plane at different positions due to chromatic aberration of the lens. In the image processing method performed in the image processing apparatus using confocal,
Delivering at least two light sources to the lens;
The lens receiving light from at least two light sources;
A light source passing through the lens forming a focal plane at different positions;
Irradiating light refracted through the lens onto a measurement object;
Moving a measurement object moving unit to a position of the measurement object;
Detecting through the image acquisition unit whether the measurement object reaches a focal plane existing at different positions through the lens; And
And a measuring object moving control unit controlling a moving speed of the measuring object moving unit according to the detection result. The method of claim 6, wherein the controlling of the moving speed of the measurement object moving unit comprises:
When the measurement object is moved while the measurement object is moved, when the first focal plane corresponding to the focal position closest to the lens is reached, the moving speed of the measurement object is reduced. Treatment method. The method of claim 6, wherein the controlling of the moving speed of the measurement object moving unit comprises:
When the measurement object is moved while the measurement object is moved, a confocal image is increased when the movement speed of the measurement object is increased when the position at which the last focal plane corresponding to the focal point farthest from the lens exists exists. Treatment method. 9. The method according to claim 7 or 8,
Confocal image further comprising the step of processing the image by confocal through the image data obtained by the image acquisition unit in the section where the measurement object is the last focus plane from the position of the first focal plane Treatment method. The method according to claim 6,
The at least two light sources have different wavelengths, and the light sources passing through the lens due to different wavelengths have different focal planes due to chromatic aberration of the lens.

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