JP2011248749A - Image processing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing apparatus capable of easily acquiring a line image of an area desired by a user out of inspection objects.SOLUTION: An image processing apparatus 1 comprises setting storage section 18 for storing setting data displaying the position of an extracted line within an area image. An image capturing section 11 captures a line image on a line designated as the extracted line from a camera 2 according to a capturing condition which the setting data within the setting storage section 18 displays. A setting screen display section 19 displays an area image of an inspection object 6 on a monitor 4 as a setting screen and displays any line within the area image as the extracted line on the setting screen. A position adjusting section 20 adjusts the position of the extracted line on the setting screen according to input from an operating device 3. A setting registration section 21 registers the position of the extracted line adjusted by the position adjusting section 20 as the setting data in the setting storage section 18.

Description

  The present invention relates to an image processing apparatus used for inspecting an image of an inspection object.

  Conventionally, inspecting an image of an object to be inspected visually by an inspector in the process of manufacturing, assembling, or inspecting an industrial product has a poor inspection accuracy and is not efficient. An image processing apparatus that automatically determines non-defective products is used. As this type of image processing apparatus, there is an apparatus that captures a one-dimensional image (hereinafter referred to as “line image”) in which pixels are arranged in a line, which is connected to a line sensor using a line-shaped individual imaging element.

  This image processing apparatus captures a plurality of line images while moving the inspection object relative to the license sensor, and arranges the captured plurality of line images in time series so that pixels are two-dimensionally arranged. Is generated. This two-dimensional image is used, for example, for inspection of non-defective / defective products of the inspection object.

  By the way, an area image sensor capable of capturing a two-dimensional image in which pixels are two-dimensionally arranged (hereinafter referred to as “area image”) is used as an image sensor, and a line image is obtained by capturing only a video signal of a specific scanning line. A technique to acquire has been proposed (see, for example, Patent Document 1). By using this technique, the image processing apparatus can acquire either an area image or a line image with a camera.

JP 2004-147271 A

  However, when a line image of a specific scanning line is acquired using an area image sensor, the image processing apparatus obtains a line image of one line for each imaging from the camera, so that the user desires among inspection objects. Setting for obtaining a line image of a location is difficult. That is, the user needs to repeatedly capture the line image with the camera while adjusting the inspection object, the position of the illumination, or the imaging timing until a line image of a desired portion of the inspection object is obtained. Therefore, the above setting work takes time.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide an image processing apparatus capable of easily acquiring a line image of a portion desired by a user among inspection objects.

  An image processing apparatus according to the present invention is provided on a predetermined extraction line in an area image from a camera that uses an area image sensor that can capture an image of an inspection object as an area image in which pixels are two-dimensionally arranged. An image capturing unit that captures an image in which pixels are arranged in a line as a line image, an image storage unit that stores a plurality of the line images, and a plurality of the line images in the image storage unit are arranged to arrange two pixels. An image processing apparatus comprising: an image generation unit that generates a two-dimensionally arranged two-dimensional image, wherein the line image in the image capturing unit is data indicating at least the position of the extraction line in the area image A setting storage unit that stores setting data for determining the capture condition of the image, and the area image captured from the camera is displayed as a setting screen. A setting screen display unit that displays any line in the area image as the extraction line on the setting screen; a position adjustment unit that adjusts the position of the extraction line on the setting screen in accordance with an input from an operating device; And a setting registration unit that registers the position of the extraction line adjusted by the position adjustment unit in the setting storage unit as the setting data.

  The image processing apparatus further includes a line number setting unit that sets the number of the line images constituting the two-dimensional image in accordance with an input from the operation device, and the setting registration unit is set by the line number setting unit. It is preferable that the number of the line images is registered in the setting storage unit as the setting data.

  In this image processing apparatus, it is more preferable that there are a plurality of types of inspection objects, and the setting registration unit registers the setting data in the setting storage unit for each type of inspection object.

  In this image processing apparatus, a test capturing unit that captures the line image from the camera using the setting data stored in the setting storage unit at a timing determined according to an input from the operation device; It is more desirable to further include a test display unit that displays the two-dimensional image generated by the image generation unit from the plurality of line images acquired by the test acquisition unit.

  In this image processing apparatus, the image processing apparatus further includes a shading correction unit that performs shading correction for suppressing luminance unevenness in the longitudinal direction of the line image with respect to the two-dimensional image, and the test display unit is configured to perform the shading correction performed by the shading correction unit. It is more desirable to display the two-dimensional image.

  In this image processing apparatus, the test capturing unit determines only the timing to start capturing the line image constituting the two-dimensional image according to the input from the operation device, and after the start of capturing the line image, More preferably, the line images are sequentially captured in synchronization with an encoder signal representing a relative positional relationship between the camera and the inspection object.

  In this image processing apparatus, the inspection object has a cylindrical shape and rotates around a central axis within the field of view of the camera, and the image capture unit is the line image on a line along the central axis of the inspection object. A reference display unit for acquiring the number of line images that can be acquired while the inspection object makes one round, based on the number of pulses generated according to the rotation angle of the inspection object and displaying it as a guide It is more desirable to provide further.

  In this image processing apparatus, the image capturing unit extracts a feature amount for each line image, and starts writing the line image to the image storage unit when the feature amount satisfies a predetermined condition. More desirable.

  In this image processing apparatus, the inspection object is cylindrical and rotates around a central axis within the field of view of the camera, and the image capturing unit is configured to move the line on a line along the central axis of the inspection object. The image is written to the image storage unit more than one round of the inspection object, and the image generation unit detects a pre-registered mark from the plurality of line images in the image storage unit, More preferably, the two-dimensional image is generated by shifting the two-dimensional image so that the line image having the mark is located at the center of the two-dimensional image.

  In this image processing apparatus, a shading correction unit that performs shading correction for suppressing luminance unevenness in the longitudinal direction of the line image with respect to the two-dimensional image, and the two-dimensional image after the shading correction by the shading correction unit are stored. It is more desirable to further include an image storage unit.

  In this image processing apparatus, a correction value for storing a shading correction unit that performs shading correction for suppressing luminance unevenness in the longitudinal direction of the line image with respect to the two-dimensional image, and a correction table that is used when the shading correction unit performs the shading correction It is more preferable that the correction table further includes a storage unit, and the correction table obtained from one line image is registered in advance in the correction value storage unit.

  The present invention has an advantage that a line image of a portion desired by a user among inspection objects can be easily obtained.

1 is a schematic block diagram illustrating a configuration of a first embodiment. It is a schematic perspective view which shows the relationship between the camera and inspection object used in the same as the above. It is a time chart which shows operation | movement same as the above. It is explanatory drawing which shows the two-dimensional image used in the same as the above. It is explanatory drawing which shows the production | generation method of a two-dimensional image same as the above. It is explanatory drawing which shows a setting screen same as the above. It is a schematic plan view which shows the relationship between the camera and inspection object used in the same as the above. It is explanatory drawing which shows the luminance distribution of an area image same as the above.

(Embodiment 1)
The image processing apparatus according to the present embodiment is connected to a camera that captures an image of an inspection object, and is used to determine whether the inspection object is a non-defective product or a defective product.

  As shown in FIG. 1, the image processing apparatus 1 includes an image capturing unit 11 that captures an image from the camera 2 and an image storage unit 12 that stores an image captured by the image capturing unit 11. 10 is prepared.

  As the camera 2, an area image sensor capable of capturing a two-dimensional image (hereinafter referred to as “area image”) in which pixels are two-dimensionally arranged is used as an image sensor. In the present embodiment, a CMOS (Complementary Metal Oxide Semiconductor) image sensor is used as the image sensor of the camera 2, but the present invention is not limited to this, and another individual image sensor such as a CCD may be used. The camera 2 is a color camera that captures a color image, but may be a camera that captures a grayscale image having a grayscale value as a pixel value.

  The camera 2 captures not only the area image but also only the video signal of the predetermined scanning line from the image sensor, so that a one-dimensional image in which pixels on the predetermined extraction line in the area image are arranged in a line (hereinafter referred to as an image). , “Line image”). In other words, the camera 2 has a control circuit (not shown) that can switch between two operation modes of an area imaging mode for outputting a normal area image and a line imaging mode for outputting a line image. It can be used not only as a camera but also as a line sensor. The control circuit switches the operation mode according to the signal from the image processing apparatus 1.

  In the line imaging mode, the control circuit reads a video signal (pixel value) of each pixel for a predetermined line in the area image set as the extraction line from the imaging device, and outputs it as a line image to the image processing apparatus 1. . In this embodiment, the extraction line is a horizontal scanning line (a line related to horizontal scanning) in the area image, but is not limited thereto, and a vertical scanning line (a line related to vertical scanning) may be used as the extraction line.

  The image capturing unit 11 operates the control circuit of the camera 2 in the line imaging mode to capture line images from the camera 2 and sequentially writes the captured line images to the image storage unit 12. As a result, a plurality of line images are stored in the image storage unit 12. The image capturing unit 11 synchronizes with the camera 2 by a horizontal synchronization signal and a vertical synchronization signal.

  Here, the image processing apparatus 1 includes a computer device having a CPU and a memory, and includes an operation device 3 such as a dedicated keypad and a mouse, a monitor 4, an encoder and a PLC (programmable logic controller) described later, and the like. The apparatus 5 is configured to be connectable.

  Furthermore, the image processing apparatus 1 includes an image generation unit 13 that generates a two-dimensional image in which pixels are two-dimensionally arranged, a shading correction unit 14 that performs shading correction on the two-dimensional image, and a corrected two-dimensional image. The pre-processing unit 10 includes an image storage unit 15 that stores the image. The image processing apparatus 1 displays the two-dimensional image stored in the image storage unit 15 on the monitor 4 and automatically determines the quality of the inspection object based on the size and shape of the inspection region in the two-dimensional image. The main processing unit 16 that performs the above processing and a synchronization processing unit 23 to be described later are further provided.

  The image generation unit 13 generates a two-dimensional image by arranging a plurality of line images in the image storage unit 12 in time series. That is, a plurality of line images are stored in time series in the image storage unit 12, and the image generation unit 13 arranges the plurality of line images side by side in the width direction so that the pixels are two-dimensionally vertically and horizontally. Generate an arranged two-dimensional image.

  The shading correction unit 14 performs shading correction on the two-dimensional image generated by the image generation unit 13 so as to suppress luminance unevenness in the longitudinal direction of the line image. In short, the line image captured by the camera 2 may vary in luminance in the longitudinal direction due to the influence of the characteristics of the image sensor, lens aberration, and the like, so the shading correction unit 14 corrects this luminance variation. And suppress uneven brightness.

  Here, the shading correction unit 14 calculates an average value of the luminance values (pixel values) of the pixels constituting the line image, and uses a correction table for correcting the luminance value of each pixel to be the calculated average value. To correct shading. The correction table is obtained from one line image and is stored in advance in the correction value storage unit 17. The shading correction unit 14 performs shading correction on all line images constituting the two-dimensional image using the same correction table.

  In addition, the preprocessing unit 10 may have a function of performing various preprocessing such as binarization on the two-dimensional image. In this case, the image storage unit 15 performs the preprocessing after shading correction. A two-dimensional image before being applied is saved.

  The synchronization processing unit 23 receives signals from an encoder or PLC connected to the image processing apparatus 1 as the external apparatus 5 so that the line image can be captured by the image capturing unit 11 in synchronization with these signals. In addition, a trigger is output to the image capturing unit 11.

  Next, the operation of the image processing apparatus 1 configured as described above will be briefly described. Here, an example is shown in which the image processing apparatus 1 is used for the inspection of the outer peripheral surface of a cylindrical (including cylindrical) inspection object.

  As shown in FIG. 2, the inspection object 6 is arranged in the field of view of the camera 2 and is rotated around the central axis by a rotation mechanism (not shown). The camera 2 is installed in a direction that matches the horizontal scanning line direction in the area image with the central axis of the inspection object 6, and a vertical line (a line along the central axis) on the outer peripheral surface of the inspection object 6 is used as a line image. Take an image. The rotation mechanism includes an encoder (rotary encoder) that generates a pulse according to the rotation angle of the inspection object 6, and this encoder is connected to the image processing apparatus 1 as an external device 5.

  The image capturing unit 11 sequentially captures line images from the camera 2 in synchronization with an encoder signal that is output from the encoder and represents a relative positional relationship between the camera 2 and the inspection object 6, and stores the image. The data is sequentially written in the unit 12. As shown in FIG. 3, the encoder signal is composed of three phases: (a) Z phase, (b) A phase, and (c) B phase. Each time the inspection object 6 rotates by a predetermined angle, the A phase, B phase A pulse is generated in the phase, and a pulse is generated in the Z phase every time the inspection object 6 makes one round. The encoder signal represents the direction in which the inspection object 6 rotates by the A phase and the B phase having a predetermined phase difference.

  The image capturing unit 11 receives a trigger (FIG. 3D) generated by the synchronization processing unit 23 in synchronization with the A-phase pulse, and captures a line image (FIG. 3E). As a result, the image storage unit 12 stores a plurality of line images obtained by cutting the outer peripheral surface of the inspection object 6 in the vertical direction.

  Therefore, the image generating unit 13 generates a two-dimensional image by arranging a large number of line images captured by the image capturing unit 11 in time series while the inspection object 6 makes one round, as shown in FIG. A two-dimensional image 30 in which the outer peripheral surface of the inspection object 6 is developed can be obtained. In FIG. 4, the two-dimensional image 30 is configured by arranging a plurality of line images (regions separated by broken lines in the drawing) 31 in the horizontal direction of the drawing.

  That is, when an image of the cylindrical inspection object 6 is taken as a normal area image from one direction, the outer peripheral surface of the inspection object 6 is curved and appears distorted. On the other hand, in the present embodiment, the image processing apparatus 1 captures the image of the inspection object 6 as the line image 31 as described above. Therefore, the image (2) in which the outer peripheral surface of the inspection object 6 is developed with almost no distortion. A dimensional image 30) can be acquired.

  Here, in the present embodiment, the image capturing unit 11 is configured to write the line image 31 to the image storage unit 12 in eyes that are larger than one round of the inspection object 6. That is, the image capturing unit 11 writes the line image 31 of the inspection object 6 in the image storage unit 12 for one round + 2α as shown in FIG.

  The image generation unit 13 detects a mark P1 registered in advance from the plurality of line images 31 in the image storage unit 12, and the line image 31 including the mark P1 is positioned at the center of the two-dimensional image. The two-dimensional image 30 for one circumference of the inspection object 6 is generated. The mark P <b> 1 is attached in advance to a portion that should be the center of the two-dimensional image 30 on the outer peripheral surface of the inspection object 6. That is, as shown in FIG. 5, the image generation unit 13 generates a two-dimensional image by arranging line images 31 of one rotation + 2α of the inspection object 6 and generates a two-dimensional image centered on the mark P1 from the image. The image 30 is extracted.

  Thereby, even if the center of the two-dimensional image 30 is deviated from the position to be the center of the outer peripheral surface of the inspection object 6, the image generation unit 13 shifts the two-dimensional image 30 by the amount of the deviation. A desired two-dimensional image 30 can be acquired. In short, the image generation unit 13 acquires the two-dimensional image 30 centered on the mark P1 even if the orientation of the inspection object 6 varies when the image capturing unit 11 starts capturing the line image 31. can do.

  The two-dimensional image 30 obtained in this way is subjected to shading correction and then used, for example, for quality inspection of the inspection target 6 by the main processing unit 16. Although detailed explanation is omitted here, an illumination device (not shown) that illuminates the inspection object 6 is used when the inspection object 6 is imaged by the camera 2.

  The timing at which the image capturing unit 11 starts to write the line image 31 to the image storage unit 12 is generally determined by an input from the external device 5 such as a PLC. For example, when a sensor for detecting the position of the inspection object 6 is connected to the PLC and the sensor detects that the inspection object 6 has entered the field of view of the camera 2, the image capturing unit 11 is triggered by the synchronization processing unit 23. In response, the writing of the line image 31 to the image storage unit 12 is started.

  On the other hand, in this embodiment, the image capturing unit 11 extracts a feature amount for each line image 31 captured from the camera 2, and when this feature amount satisfies a predetermined condition, the line to the image storage unit 12 is extracted. The image 31 is started to be written. The feature amount here is, for example, a color included in the line image 31, and the image capturing unit 11 determines that the feature amount (color) matches the color included in the inspection target object 6, so that a predetermined condition is satisfied. It is judged that

  Thereby, the image capturing unit 11 can determine that the inspection object 6 has entered the field of view of the camera 2 without using a separate sensor, and can start writing the line image 31. is there.

  Furthermore, since the image processing apparatus 1 is provided with the shading correction unit 14 and stores the two-dimensional image 30 after the shading correction in the image storage unit 15, the image processing apparatus 1 can suppress the luminance unevenness in the longitudinal direction of the line image 31. A quality two-dimensional image 30 can be used for inspection. In addition, since the shading correction unit 14 uses the same correction table for all line images 31 constituting the two-dimensional image 30, compared to the case where a correction table having individual correction values is used for all pixels of the two-dimensional image 30. The calculation of shading correction is simplified.

  The image processing apparatus 1 may be configured to capture an area image from the camera 2 and capture the line image 31 on the extraction line extracted from the area image by the image capturing unit 11. In this case, the image processing apparatus 1 can capture the line image 31 even using the camera 2 that does not support the line imaging mode.

  By the way, the image processing apparatus 1 according to the present embodiment allows the user to arbitrarily set which line in the area image is taken as the line image 31, that is, the user can arbitrarily set the position of the extraction line in the area image. The following configuration is adopted so that it can be set.

  That is, the image processing apparatus 1 includes a setting storage unit 18 that stores at least setting data indicating the position of the extraction line in the area image, and a setting screen display unit 19 that is used for setting the setting data, as shown in FIG. The position adjustment unit 20 and the setting registration unit 21 are further provided in the front processing unit 10.

  The image processing apparatus 1 has two operation modes, an inspection mode for capturing a line image 31 from the camera 2 and a setting mode in which setting data is set, and operates according to an input from the operation device 3. Switch modes.

  The image capture unit 11 captures the line image 31 from the camera 2 under the capture conditions determined by the setting data in the setting storage unit 18. Specifically, the image capturing unit 11 has a communication function with the camera 2, and the camera 2 determines which line in the area image is to be an extraction line according to the setting data in the setting storage unit 18. Instruct. As a result, the camera 2 determines a scanning line for reading the line image 31 from the image sensor in accordance with the setting data in the setting storage unit 18, and the line image 31 on the line designated as the extraction line is input to the image capturing unit 11. Output. The setting storage unit 18 may be provided in the camera 2.

  In the setting mode, the setting screen display unit 19 displays the area image of the inspection object 6 captured from the camera 2 by the image capturing unit 11 on the monitor 4 as a setting screen, and any line in the area image. Is displayed on the setting screen as an extraction line. That is, the area image is displayed on the monitor 4 as a setting screen 32 as shown in FIG. 6, and an extraction line (line indicated by a two-dot chain line in the drawing) 33 is displayed on the setting screen 32. In FIG. 6, an area image obtained by imaging the inspection target 6 shown in FIG. 2 is displayed as the setting screen 32, and the outer peripheral surface of the inspection target 6 is curved. The letter “A” is displayed distorted.

  The position adjustment unit 20 adjusts the position of the extraction line 33 on the setting screen 32 according to the input from the operation device 3. That is, the position adjustment unit 20 receives the operation of the operation device 3 by the user, and moves the position of the extraction line 33 on the setting screen 32 in the width direction of the extraction line 33 (up and down direction in FIG. 6). Adjust the position.

  The setting registration unit 21 registers the position of the extraction line 33 adjusted by the position adjustment unit 20 in the setting storage unit 18 as setting data. Thereby, the position of the extraction line 33 adjusted on the setting screen 32 is reflected in the setting data in the setting storage unit 18.

  In the present embodiment, the image processing apparatus 1 further includes a line number setting unit 22 that sets the number of line images 31 constituting the two-dimensional image 30 in accordance with an input from the operation device 3 in the front processing unit 10. ing. The setting registration unit 21 also registers the acquired number of line images 31 set by the line number setting unit 22 in the setting storage unit 18 as setting data.

  As a result, the image capturing unit 11 captures the number of line images 31 set in the setting storage unit 18 as setting data from the camera 2 as the line images 31 constituting the two-dimensional image 30, and stores them in the image storage unit 12. Remember. As a result, the image generation unit 13 generates a two-dimensional image 30 from the number of line images 31 set in the setting storage unit 18 as setting data.

  Here, in this embodiment, there are a plurality of types (multiple types) of inspection objects 6, and the setting registration unit 21 uses the setting data (the position of the extraction line 33 and the number of lines image 31 to be acquired) for each type of the inspection object 6. Is registered in the setting storage unit 18. In the inspection mode, the image capturing unit 11 specifies the type of the inspection object 6 in accordance with the input from the operation device 3, and reads out the setting data corresponding to this type from the setting storage unit 18. Apply setting data according to the type.

  A setting data setting method in the image processing apparatus 1 having the above-described configuration will be briefly described below.

  When the user operates the operation device 3 to switch the operation mode of the image processing device 1 to the setting mode, the setting screen display unit 19 displays a setting screen 32 as shown in FIG. In this state, the user operates the operation device 3 to move the extraction line 33 (in the vertical direction in FIG. 6) on the GUI (Graphical User Interface) to adjust the position of the extraction line 33. When the position of the extraction line 33 is determined, the user operates the operation device 3 to determine the position of the extraction line 33 and registers the adjusted position of the extraction line 33 in the setting storage unit 18 as setting data.

  When the position of the extraction line 33 is determined, the setting screen display unit 19 displays an input screen for determining the number of line images 31 to be acquired on the setting screen 32. In this state, the user operates the controller device 3 to set the acquired number of line images 31 and registers the acquired number in the setting storage unit 18 as setting data.

  According to the image processing apparatus 1 of the present embodiment described above, the user can arbitrarily set the capturing position of the line image 31 in the area image (that is, the position of the extraction line 33) in the setting mode. . That is, the user can adjust the position of the extraction line 33 while confirming the area image of the inspection object 6 and the position of the extraction line 33 in the area image on the setting screen 32 displayed on the monitor 4. . Therefore, the user can set the extraction line 33 at a desired location in the inspection object 6. Therefore, if the image processing apparatus 1 is used, it is possible to easily acquire the line image 31 of the portion desired by the user in the inspection object 6.

  As a specific example, for example, when the relative positional relationship between the camera 2 and the inspection object 6 is deviated, it is necessary to adjust the position of the extraction line 33. That is, as shown in FIG. 7A, when the inspection object 6 is located in front of the camera 2, if the middle line of the area image is set as the extraction line 33, the camera 2 is It is possible to acquire a line image 31 in front of six. In general, when a cylindrical inspection object 6 is imaged by the camera 2, the front surface of the inspection object 6 is brightest, so that the line image 31 directly in front of the inspection object 6 can be acquired in this way. desirable.

  However, as shown in FIG. 7B or FIG. 7C, when the inspection object 6 is shifted from the front in front of the camera 2, even if the extraction line 33 is set in the middle of the area image, the camera 2 Cannot acquire the line image 31 directly in front of the inspection object 6. In this case, if the camera 2 is moved directly in front of the inspection object 6, the user needs to finely adjust the position of the camera 2, and there is a problem that the adjustment takes time.

  On the other hand, if the image processing apparatus 1 is used, a line image 31 at an arbitrary position of the inspection object 6 can be acquired. Therefore, even if the position of the inspection object 6 is shifted, the user can change the position of the extraction line 33. It is possible to obtain a line image 31 in front of the inspection object 6 simply by changing. In short, the user can easily obtain the line image 31 directly in front of the inspection object 6 without changing the relative positional relationship between the camera 2 and the inspection object 6.

  As another specific example, when a wide-angle lens is used for the camera 2, an area image captured by the camera 2 may be relatively bright near the center and darker as the periphery. In such a case, it is desirable that the image processing apparatus 1 obtains a line image 31 of a line having a high average luminance value among the area images, as shown in FIG. FIG. 8 shows the luminance distribution in each of the vertical and horizontal directions of the area image.

  Even in this case, by using the image processing apparatus 1, the user can extract a line having a high average brightness value from the area image without changing the relative positional relationship between the camera 2 and the inspection object 6. The line image 31 of this line can be acquired. Here, the uneven luminance in the horizontal direction in FIG. 8 is reduced by performing the above-described shading correction in the shading correction unit 14.

  In these specific examples, the position adjustment unit 20 may have a function of automatically adjusting the position of the extraction line 33 so that the line with the highest luminance in the area image is the extraction line 33. Good.

  Further, the image processing apparatus 1 of the present embodiment is provided with the line number setting unit 22, so that the user can arbitrarily set the number of line images 31 constituting the two-dimensional image 30. It is. Therefore, for example, even if it becomes necessary to change the number of line images 31 to be acquired depending on the type of the inspection object 6, the user can easily change the number of line images 31 to be acquired.

  Furthermore, since the setting registration unit 21 registers the setting data in the setting storage unit 18 for each type of the inspection object 6, it is possible to easily change the capturing condition of the line image 31 for each type of the inspection object 6. it can. That is, if setting data for a plurality of types of inspection objects 6 is registered in the setting storage unit 18, the user can easily set the settings according to the types by simply specifying the type of the inspection object 6 in the inspection mode. It is possible to recall data.

  The setting data stored in the setting storage unit 18 may be data that determines the capturing condition of the line image 31 in the image capturing unit 11, and the capturing position of the line image 31 and the line image 31 as described above. It is not limited to data indicating only the number of acquired items. That is, the setting data is data that determines various capturing conditions such as the gain of the image capturing unit 11 and the shutter speed instructed to the camera 2 by the image capturing unit 11 communicating with the camera 2. May be included.

  By the way, the image processing apparatus 1 obtains the number of line images 31 that can be captured by the image capturing unit 11 while the inspection target 6 makes one round based on the number of pulses of the encoder signal output by the encoder, You may further provide the guide display part (not shown) displayed as a guide. As described above, the encoder signal generates a pulse in the A phase (FIG. 3B) every time the inspection object 6 rotates by a predetermined angle, and the Z phase (FIG. 3) every time the inspection object 6 makes one turn. A pulse is generated in (a)). Therefore, the reference display unit measures how many times the A-phase pulse is generated between the two Z-phase pulses, and the image capturing unit 11 captures the result based on the measurement result (number of A-phase pulses). The number of line images 31 that can be included is obtained. For example, when the A-phase pulse is generated 100 times between the two Z-phase pulses, the reference display unit is a line that can be captured by the image capturing unit 11 while the inspection object 6 makes one round. A guide for the number of images 31 is displayed on the monitor 4 as “100”.

  Thus, by displaying the guideline of the number of line images 31 that can be captured, the user can easily obtain the number of line images 31 without performing any analysis on the encoder signal with reference to this guideline. Can be set. However, the number of line images 31 displayed by the guide display unit is only a guide, and if it is not necessary to acquire the line images 31 for the entire circumference of the inspection object 6, the number of line images 31 to be set is less than the guide. Less. When the image capturing unit 11 captures two line images 31 for one A-phase pulse, or captures one line image 31 for a plurality of A-phase pulses, the reference display unit displays A A configuration may be used in which the number obtained by multiplying the phase pulse by a coefficient is used as a guide.

  In this embodiment, the cylindrical inspection object 6 is exemplified, but the shape of the inspection object 6 is not limited, and the image processing apparatus 1 is used for an inspection object having a shape other than the columnar shape. Is also possible.

  Further, the image processing apparatus 1 may be configured so that the camera 2 can be operated in the area imaging mode and the area image can be captured from the camera 2 not only in the setting mode but also in the inspection mode.

(Embodiment 2)
The image processing apparatus 1 according to the present embodiment uses a setting data stored in the setting storage unit 18 to testly acquire a line image 31 from the camera 2 on a test basis (not shown), and a test The display unit (not shown) is different from the image processing apparatus 1 according to the first embodiment.

  The test capture unit starts taking a test of the line image 31 at a timing determined according to an input from the controller device 3 and writes the test-taken line image 31 in a test area in the image storage unit 12. The test display unit displays the two-dimensional image 30 generated by the image generation unit 13 from the plurality of line images 31 stored in the test area in the image storage unit 12 on the monitor 4 as a test image.

  In other words, the image processing apparatus 1 according to the present embodiment shifts to the test mode when the user performs a predetermined operation on the operation device 3 while operating in the setting mode, and uses the line image 31 captured by the test capturing unit. The constituted two-dimensional image 30 is displayed on the monitor 4 as a test image.

  According to the image processing apparatus 1 having the configuration described above, the user operates the operation apparatus 3 to shift to the test mode, thereby capturing the line image 31 on a trial basis and a two-dimensional image (test image) at an arbitrary timing. 30 displays can be executed by the image processing apparatus 1. In short, regardless of the input state from the external device 5, the image processing apparatus 1 starts taking a test of the line image 31 and displays the two-dimensional image 30 composed of the line image 31. Therefore, after setting the setting data (the position of the extraction line 33 and the number of line images 31 to be acquired), the user actually displays the two-dimensional image 30 at an arbitrary timing, and the image processing apparatus 1 with the setting data already set. Can be confirmed.

  The test display unit is preferably configured to display the two-dimensional image 30 after the shading correction is performed by the shading correction unit 14 as a test image. Thereby, even in the test mode, the user can check the two-dimensional image 30 after shading correction used at the time of actual inspection, so that it is easy to determine whether or not the setting data is appropriate.

  By the way, the test acquisition part should just be the structure by which the timing which starts the acquisition of the line image 31 is determined according to the input from the operating device 3. FIG. For example, the test capturing unit sequentially captures the line images 31 at a predetermined cycle after the start of capturing the line images 31, or the line images 31 at intervals arbitrarily set according to the input from the operation device 3. May be configured to sequentially capture the.

  Alternatively, the test capturing unit determines only the timing for starting the capturing of the line image 31 constituting the two-dimensional image 30 according to the input from the operation device 3, and after starting the capturing, the test capturing unit captures the line image 31 in synchronization with the encoder signal. It may be configured to sequentially capture. According to this configuration, the user can freely determine the timing for starting the test shooting, and the subsequent capturing interval of the line image 31 is the same as in the actual inspection. It becomes easy to judge.

  Other configurations and functions are the same as those of the first embodiment.

DESCRIPTION OF SYMBOLS 1 Image processing apparatus 2 Camera 3 Operation apparatus 4 Monitor 6 Inspection object 11 Image capture part 12 Image storage part 13 Image generation part 14 Shading correction part 15 Image preservation | save part 17 Correction value storage part 18 Setting storage part 19 Setting screen display part 20 Position Adjustment Unit 21 Setting Registration Unit 22 Line Number Setting Unit 30 Two-dimensional Image 31 Line Image 32 Setting Screen 33 Extraction Line P1 Mark

Claims (11)

  An image in which pixels on a predetermined extraction line in the area image are arranged in a line from a camera that uses an area image sensor that can capture an image of an inspection object as an area image in which pixels are two-dimensionally arranged as an image sensor. An image capture unit that captures a line image, an image storage unit that stores a plurality of line images, and a two-dimensional image in which pixels are arranged two-dimensionally by arranging the plurality of line images in the image storage unit An image processing apparatus including an image generation unit for generating data, which is at least data indicating a position of the extraction line in the area image and determines setting conditions for the line image in the image acquisition unit Is stored in the setting storage unit, and the area image captured from the camera is displayed as a setting screen, and any one of the area images is displayed. A setting screen display unit that displays a line as the extraction line on the setting screen, a position adjustment unit that adjusts the position of the extraction line on the setting screen according to an input from an operating device, and an adjustment by the position adjustment unit An image processing apparatus, further comprising: a setting registration unit that registers the position of the extracted line as the setting data in the setting storage unit.   A line number setting unit configured to set the number of the line images constituting the two-dimensional image according to an input from the operation device; and the setting registration unit configured to set the number of the line images set by the line number setting unit. The image processing apparatus according to claim 1, wherein the setting data is registered in the setting storage unit.   The image according to claim 1, wherein there are a plurality of types of inspection objects, and the setting registration unit registers the setting data in the setting storage unit for each type of the inspection objects. Processing equipment.   A test acquisition unit that acquires the line image from the camera using the setting data stored in the setting storage unit at a timing determined according to an input from the operation device, and the test acquisition unit 4. The test display unit according to claim 1, further comprising a test display unit configured to display the two-dimensional image generated by the image generation unit from the plurality of captured line images. 5. Image processing apparatus.   The image display apparatus further includes a shading correction unit that performs a shading correction for suppressing luminance unevenness in the longitudinal direction of the line image with respect to the two-dimensional image, and the test display unit displays the two-dimensional image after the shading correction by the shading correction unit. The image processing apparatus according to claim 4, wherein the image processing apparatus displays the image.   The test capturing unit determines only the timing to start capturing the line image constituting the two-dimensional image according to the input from the operating device, and after the start of capturing the line image, the camera and the inspection object The image processing apparatus according to claim 4, wherein the line images are sequentially captured in synchronization with an encoder signal representing a relative positional relationship between the image processing apparatus and the image processing apparatus.   The inspection object is cylindrical and rotates around a central axis within the field of view of the camera, and the image capturing unit captures the line image on a line along the central axis of the inspection object, and the inspection object It further comprises a guideline display unit for obtaining the number of line images that can be captured during one round of an object based on the number of pulses generated according to the rotation angle of the inspection object and displaying it as a guideline. The image processing apparatus according to any one of claims 1 to 6.   The image capturing unit extracts a feature amount for each line image, and starts writing the line image to the image storage unit when the feature amount satisfies a predetermined condition. The image processing device according to claim 7.   The inspection object is cylindrical and rotates around a central axis within the field of view of the camera, and the image capturing unit displays the line image on a line along the central axis of the inspection object as the inspection object. More than one round of the object is written in the image storage unit, and the image generation unit detects a pre-registered mark from the plurality of line images in the image storage unit, and the line having the mark 9. The two-dimensional image for one round of the inspection object is generated by shifting the two-dimensional image so that the image is located at the center of the two-dimensional image. The image processing apparatus according to any one of the above.   A shading correction unit that performs shading correction for suppressing luminance unevenness in the longitudinal direction of the line image with respect to the two-dimensional image; and an image storage unit that stores the two-dimensional image after the shading correction by the shading correction unit. The image processing apparatus according to claim 1, further comprising: an image processing apparatus according to claim 1. A shading correction unit that performs shading correction for suppressing luminance unevenness in the longitudinal direction of the line image with respect to the two-dimensional image; and a correction value storage unit that stores a correction table used when the shading correction unit performs the shading correction. The image processing apparatus according to claim 1, wherein the correction table obtained from one line image is registered in the correction value storage unit in advance.

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