JP2014095623A - Device, method, and program for displaying images - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device capable of efficiently displaying long size images.SOLUTION: An image display device acquires a long size image having a display size in a first direction on a display screen longer than a screen size in the first direction on the display screen, divides the long sized image into plurality in the first direction to create a plurality of divided images having the display size less than the screen size of the display screen, and displays at least selected one of the plurality of divided images and correspondence information indicating to which part of the long size image the selected divided image corresponds.

Description

  The present invention relates to an image display apparatus and method for displaying a long image, and a program.

  Non-destructive inspection using X-rays (NDT: Non Destructive) as an inspection method for inspecting whether or not defects such as cracks and bubbles are included in the welds of each pipe in a pipeline formed by welding multiple pipes Testing) is known (see Patent Document 1).

  In the nondestructive inspection of the welded part, for example, an X-ray source is arranged inside the welded part, and an imaging plate (IP) is wound around the outer peripheral surface of the welded part along the circumferential direction. Wear (see FIG. 3). Then, by irradiating the welded portion with X-rays from the radiation source, X-rays transmitted through the welded portion are incident on the imaging plate and accumulated as X-ray image information in the imaging plate. The X-ray image information accumulated in the imaging plate is read by an imaging plate image reader, and then taken into a personal computer (hereinafter simply referred to as PC) as an X-ray fluoroscopic image. This X-ray fluoroscopic image is displayed on a PC monitor. By checking the X-ray fluoroscopic image displayed on the monitor, it is possible to determine the presence or absence of a defect in the weld.

  At this time, in the inspection apparatus described in Patent Document 1, the specific luminance region is emphasized by performing the thinning process at different thinning rates on the specific luminance region of the fluoroscopic image and the other luminance regions. can do.

  Further, in the inspection apparatus described in Patent Document 2, an X-ray fluoroscopic image acquired from an image plate or the like is extracted by dividing it into a plurality of regions according to the range of luminance values, and brightness and darkness of luminance is emphasized in each region image. An image that has been quantized and changed is displayed on the monitor. This makes it easier to identify the internal state of the object to be inspected, such as a weld.

JP 2011-089810 A JP 2008-292205 A

  By the way, since the pipeline has a large diameter, a long imaging plate is used for nondestructive inspection of the welded portion. Therefore, the X-ray fluoroscopic image obtained from the long imaging plate has a large aspect ratio in the vertical and horizontal directions, and is longer than the horizontal display size of the display screen of the PC monitor. For this reason, in the inspection apparatus of patent document 1, when displaying a long X-ray fluoroscopic image, information (display range) that can be confirmed at a time on the monitor is limited, and thus it is difficult to grasp the entire image. Problems arise. There is also a problem that the scrolling operation of the fluoroscopic image on the display screen of the monitor becomes troublesome. Further, when thinning processing is performed on a long X-ray fluoroscopic image at a different thinning rate for each luminance region as described in Patent Document 1, the X-ray fluoroscopic image is displayed at the boundary of the luminance region. The image quality is not uniform. As a result, the inspector may mistakenly recognize that a defect or abnormality has occurred at the boundary of the luminance region.

  Moreover, in the inspection apparatus of Patent Document 2, the X-ray fluoroscopic image is divided into a plurality of areas and displayed according to the range of luminance values, but no consideration is given to the case where the X-ray fluoroscopic image becomes a long image. For this reason, in the inspection apparatus of patent document 2, when the image of each area | region is a long image, the information which can be confirmed at once about each image is restricted. As a result, even in the inspection apparatus of Patent Document 2, it is difficult to grasp the entire image, and the problem that the scroll operation of the inspection image becomes troublesome still occurs.

  An object of the present invention is to provide an image display apparatus, method, and program capable of efficiently displaying a long image.

  An image display apparatus for achieving an object of the present invention includes a display unit that displays an image, and a display size of the display unit in the first direction on the display screen is larger than a screen size of the display screen in the first direction. An image acquisition unit that acquires a long image, a divided image generation unit that divides the long image into a plurality of divided images in the first direction, and generates a plurality of divided images that can be displayed in the display screen; Display control means for displaying on the display screen at least one divided image and correspondence information indicating to which part of the long image the divided image corresponds;

  According to the present invention, instead of displaying a long image that is difficult to grasp as a whole on the display screen, a divided image having a display size that can be confirmed at once on the display screen, and a portion of the long image corresponding to the divided image Correspondence information indicating whether or not to be displayed can be displayed on the display screen.

  The long image is divided into N (N is a natural number of 2 or more) divided images, and M (2 ≦ M ≦ N) divided images continuous in the first direction from the N divided images. And the display control means displays the M divided images selected by the divided image selecting means side by side in a second direction perpendicular to the first direction on the display screen. Is preferred. Thereby, at least a part of the long image can be displayed in a folded manner on the display screen.

  An operation receiving unit that receives a switching operation for switching the divided images displayed on the display screen is provided, and the divided image selecting unit selects M divided images corresponding to the switching operation when the switching operation is received by the operation receiving unit. It is preferable to do. Thereby, the divided images displayed on the display screen can be switched according to the switching operation.

  The display control means displays, as correspondence information, an entire image representing the entire long image in the display screen and display information indicating which part of the entire image the divided image displayed on the display screen corresponds to. It is preferable to display on the screen. Thereby, it is possible to easily determine which part of the entire image corresponds to the divided image displayed on the display screen.

  It is preferable to include a whole image generating means for generating a whole image from the long image. This makes it easy to determine which part of the long image the divided image corresponds to.

  The entire image is generated by thinning out the pixels of the long image, and is provided with characteristic acquisition means for acquiring the characteristics of the display means including at least one of the resolution of the display screen and gradation reproducibility. The means generates in advance a whole image of the pixel thinning amount corresponding to the characteristic based on the characteristic acquired by the characteristic acquisition means and stores it in the whole image storage means, and the display control means obtains the whole image obtained from the whole image storage means. Is preferably displayed on the display screen. Thereby, the waiting time until the entire image is displayed on the display screen can be shortened.

  The divided image is generated by thinning out pixels of a portion corresponding to the divided image in the long image, and the divided image generating unit is configured to reduce the pixel thinning amount corresponding to the characteristic based on the characteristic acquired by the characteristic acquiring unit. Preferably, the divided image is generated in advance and stored in the divided image storage unit, and the display control unit displays the divided image acquired from the divided image storage unit on the display screen. Thereby, the waiting time until the entire image is displayed on the display screen can be shortened.

  A long image storage means for storing the long image acquired by the image acquisition means, and an area specifying means for specifying a partial area of the divided image displayed on the display screen. A region image corresponding to a part of the region designated by the region designation unit is extracted from the long image stored in the scale image storage unit, and an enlarged image of a part of the region is displayed on the display screen based on the region image. It is preferable. Thereby, a desired area in the divided image can be enlarged and displayed.

  The display control means preferably displays the first scale representing the position of a partial region in the long image in the enlarged image. As a result, the position can be easily determined in the long image of the enlarged display area.

  The display control means preferably displays a second scale representing the size of a partial area in the enlarged image. As a result, the size of the enlarged display area can be easily determined.

  The image acquisition means acquires a long image generated based on a detection value of a detector that detects an electromagnetic wave that has been irradiated onto the inspection object and transmitted through the inspection object. Note that the electromagnetic waves referred to here include radiation.

  The object to be inspected includes a uniform portion having a uniform thickness and a non-uniform portion having a non-uniform thickness, and each of the plurality of divided images generated by the divided image generating means includes a uniform region corresponding to the uniform portion. And a non-uniform area corresponding to the non-uniform portion, the density of the uniform area in the plurality of divided images generated by the divided image generation means is corrected to the reference density, and the density of the non-uniform area is relative to the reference density. It is preferable that an image correction unit that corrects the image density is provided, and the display control unit displays the divided image whose density has been corrected by the image correction unit on the display screen. Thereby, since the image quality of each divided image becomes uniform, the divided image can be easily viewed.

  The image display method of the present invention is an image for obtaining a long image in which the display size in the first direction on the display screen of the display means for displaying an image is longer than the screen size in the first direction of the display screen. An acquisition step, a divided image generation step of dividing the long image acquired in the image acquisition step into a plurality of divided images in a first direction to generate a plurality of divided images that can be displayed in the display screen, and a divided image generation A display control step of displaying on the display screen at least one of the plurality of divided images generated in the step and correspondence information indicating which part of the long image the divided image corresponds to. .

  The image display program of the present invention stores a long image in which the display size in the first direction on the display screen of the display means for displaying an image is longer than the screen size in the first direction of the display screen. An image acquisition process for acquiring a long image from the long image storage means, and a long image acquired by the image acquisition process is divided into a plurality of pieces in the first direction, and a divided image having a size that can be displayed on the display screen is obtained. A plurality of divided image generation processes, at least one divided image among the plurality of divided images generated by the divided image generation process, and correspondence information indicating which part of the long image the divided image corresponds to The computer executes display control processing to be displayed on the display screen.

  The image display device, method, and program of the present invention include at least one divided image among divided images obtained by dividing a long image into a plurality of pieces, and correspondence information indicating which part of the long image the divided image corresponds to. Is displayed on the display screen, so that a long image can be displayed more efficiently than before. As a result, the entire long image can be easily grasped, and the troublesome scrolling operation of the long image can be reduced as compared with the conventional case.

It is the schematic of the X-ray inspection apparatus of 1st Embodiment. It is the schematic of the imaging plate before the attachment to a welding part. It is the schematic of the imaging plate after the attachment to a welding part. It is sectional drawing which follows the IV-IV line in FIG. It is a block diagram which shows the electric constitution of PC. It is explanatory drawing for demonstrating the production | generation of a whole image. It is explanatory drawing for demonstrating the production | generation of a divided image. It is the schematic of a test | inspection image. It is explanatory drawing for demonstrating display switching operation (scroll operation). It is explanatory drawing for demonstrating other display switching operation different from the method shown in FIG. It is explanatory drawing for demonstrating a loupe screen display process. It is the flowchart which showed the flow of the test | inspection by a X-ray inspection apparatus. It is the flowchart which showed the flow of the display process of a test | inspection image. It is the flowchart which showed the flow of the loupe image display process. It is explanatory drawing which showed the case where the shift | offset | difference has arisen in the position of X-ray source. It is a block diagram which shows the electric constitution of PC of the X-ray inspection apparatus of 2nd Embodiment. It is explanatory drawing for demonstrating a divided image correction process. It is the flowchart which showed the flow of the divided image correction process. It is a block diagram which shows the electric constitution of PC of the X-ray inspection apparatus of 3rd Embodiment. It is the flowchart which showed the flow of the test | inspection by the X-ray inspection apparatus of 3rd Embodiment.

[X-ray inspection apparatus of the first embodiment]
As shown in FIG. 1, the X-ray inspection apparatus 10 acquires and displays an X-ray fluoroscopic image of a welded portion 11a between pipes 11 (see FIG. 2) constituting a pipeline. Used for inspection of defects such as cracks and bubbles. In addition, the weld part 11a is corresponded to the to-be-inspected object of this invention.

  The X-ray inspection apparatus 10 includes an X-ray source 13 that emits X-rays (electromagnetic waves) 12, a long imaging plate (detector) 14, an imaging plate reader 15, and a PC (image display apparatus) 16. I have.

  As shown in FIGS. 2 to 4, the X-ray source 13 is held by the radiation source driving device 18 so as to be movable inside the pipe 11 and along its central axis. The X-ray source 13 emits X-rays 12 radially toward the inner peripheral surface of the pipe 11 under the control of the radiation source driving device 18. The radiation source driving device 18 moves the X-ray source 13 along the central axis of the pipe 11 to a position facing the inner peripheral surface of the welded part 11a, and then from the X-ray source 13 to the inner peripheral surface of the welded part 11a. X-rays 12 are emitted toward. In addition, the code | symbol 11b shows the "non-welded part" of each pipe 11. FIG.

  The imaging plate 14 is formed longer than the circumferential length of the outer peripheral surface of the pipe 11, and is mounted on the outer peripheral surface of the welded portion 11a so as to be wound along the circumferential direction. X-rays 12 emitted from the X-ray source 13 and transmitted through the welded portion 11a are incident on the imaging plate 14, and energy information corresponding to the incident dose of the X-rays 12 is accumulated as X-ray image information (detected values). Is done. The imaging plate 14 in which the X-ray image information is accumulated is set in the imaging plate reader 15 after being removed from the welded portion 11a. The imaging plate 14 may be attached to the welded portion 11a in a state where it is housed in a protective case (not shown).

  Returning to FIG. 1, the imaging plate reader 15 is connected to the PC 16. The imaging plate reader 15 reads the X-ray image information accumulated in the imaging plate 14, generates a digital X-ray fluoroscopic image 20 of the welded part 11 a based on this X-ray image information, and outputs it to the PC 16.

  The PC 16 corresponds to the image display device of the present invention, and monitors (displays) an inspection image for inspecting the presence or absence of a defect in the welded portion 11 a based on the X-ray fluoroscopic image 20 acquired from the imaging plate reader 15. Means) 22 is displayed.

  The X-ray fluoroscopic image 20 corresponds to the long image of the present invention. Since the imaging plate 14 is formed to be longer than the screen size H1 in the horizontal direction (first direction) in the figure of the monitor 22, the horizontal display size H2 of the X-ray fluoroscopic image 20 is also the screen size H1. (See FIG. 6).

<Configuration of PC>
As shown in FIG. 5, in addition to the above-described monitor 22, the PC 16 includes a CPU 25, a storage 26, a memory 27, a keyboard 28, a mouse 29, a display driver 30, and an image input I / F (image acquisition). Means) 31. The CPU 25 loads the program stored in the storage 26 into the memory 27 and executes processing according to this program, thereby controlling the respective units of the PC 16 in an integrated manner.

  The storage 26 is, for example, a hard disk or a nonvolatile memory, and stores various programs and data such as an OS (Operating System) 33 and an image display program 34. The OS 33 is well-known basic software that manages the entire PC 16. The image display program 34 is application software for displaying the X-ray fluoroscopic image 20.

  In addition, the storage 26 is provided with an image storage unit (long image storage means) 35 for storing the X-ray fluoroscopic image 20 acquired from the imaging plate reader 15.

  The memory 27 is a work memory for the CPU 25 to execute processing. The memory 27 temporarily stores various data generated by the CPU 25. The keyboard 28 and the mouse 29 are well-known input devices used for operating the PC 16. The display driver 30 controls the display on the monitor 22 under the control of the CPU 25.

  The image input I / F 31 is connected to the imaging plate reader 15 via various communication lines. The image input I / F 31 stores the X-ray fluoroscopic image 20 acquired from the imaging plate reader 15 in the image storage unit 35.

  A touch panel 37 is provided on the display screen of the monitor 22. The touch panel 37 receives a flick operation and various gesture operations performed on the display screen. The touch panel 37 functions as an operation accepting unit of the present invention together with the keyboard 28 and the mouse 29 described above.

  When the image display program 34 is activated, the CPU 25 executes processing according to the image display program 34 to thereby execute an overall image generation unit (overall image generation unit) 40 and a divided image generation unit (divided image generation unit). ) 41 and a display control unit (display control means) 42.

  As shown in FIG. 6, the entire image generation unit 40 generates an entire image 44 representing the entire X-ray fluoroscopic image 20 in the display screen 22 a of the monitor 22 from the X-ray fluoroscopic image 20 read from the image storage unit 35. To do. For example, the entire image generation unit 40 performs the pixel thinning process on the X-ray fluoroscopic image 20 so that the display size H2 of the X-ray fluoroscopic image 20 is equal to or smaller than the screen size H1 of the display screen 22a. 44 is generated. Note that the entire image 44 may be generated from the X-ray fluoroscopic image 20 using a known method other than the pixel thinning process. This whole image 44 is temporarily stored in the memory 27.

  As shown in FIG. 7, the divided image generation unit 41 reads the X-ray fluoroscopic image 20 from the image storage unit 35, and generates a divided image 45 obtained by dividing the X-ray fluoroscopic image 20 into a plurality in the horizontal direction of the display screen 22 a. Generate. Specifically, the divided image generation unit 41 divides the X-ray fluoroscopic image 20 into a plurality of divided regions (1) to (8) corresponding to a display size equal to or smaller than the screen size H1. Then, the divided image generation unit 41 generates a plurality of divided images 45 by extracting the images of the portions corresponding to the divided regions (1) to (8) from the X-ray fluoroscopic image 20 as the divided images 45, respectively. Thereby, each divided image 45 is formed in a size that can be displayed in the display screen 22a as a whole.

  In addition, the divided image generation unit 41 performs pixel thinning processing on each divided image 45. Thereby, the data amount of each divided image 45 can be reduced.

  Furthermore, when the divided image generation unit 41 generates the divided images 45 corresponding to the divided regions (1) to (8), each divided region is expanded to the end of the adjacent divided region. A corresponding divided image 45 is generated. That is, each divided image 45 is generated so that the ends of the adjacent divided images 45 overlap each other. This is because, when image processing is performed on the divided image 45, a pseudo flaw is caused at the end portion of the divided image 45 due to a slight difference in image processing parameters applied to the center portion and the end portion of the divided image 45. This is because or a step is displayed. For this reason, by generating a divided image 45 corresponding to an area wider than the divided areas (1) to (8), portions (end portions) corresponding to the divided areas (1) to (8) of the divided image 45 are generated. It is possible to prevent the occurrence of pseudo scratches or the like in the removed central portion). In this case, the display size of the central portion of the divided image 45 may be equal to or smaller than the screen size H1.

  The divided image 45 is displayed on the display screen 22a instead of the X-ray fluoroscopic image 20 as an image for inspecting the presence or absence of defects in the welded portion 11a. In this embodiment, since the X-ray fluoroscopic image 20 is divided into the divided areas (1) to (8), the divided images 45 respectively corresponding to the divided areas (1) to (8) are generated. Hereinafter, the divided image 45 corresponding to the divided region (1) is referred to as “first divided image 45”, the divided image 45 corresponding to the divided region (2) is referred to as “second divided image 45”,. ) Is referred to as an “eighth divided image 45”. Each divided image 45 is temporarily stored in the memory 27.

  It should be noted that duplicate data of the X-ray fluoroscopic image 20 is used to generate the entire image 44 and each divided image 45 described above, and the original X-ray fluoroscopic image 20 is left in the image storage unit 35.

  Returning to FIG. 5, the display control unit 42 generates an inspection image 48 for inspecting the presence or absence of a defect in the welded portion 11a. The display control unit 42 includes a divided image selecting unit (divided image selecting unit) 50, a correspondence information generating unit 51, an inspection image generating unit 52, an enlarged region specifying unit (region specifying unit) 53, and a loupe screen generating unit. Part 54 is provided.

  The divided image selection unit 50 selects M (N (8 in this embodiment) N divided images 45) stored in the memory 27 as a divided image 45 to be displayed on the display screen 22a in the horizontal direction. In this embodiment, M = 3) divided images 45 are selected. Here, “M” is the number of divided images 45 that are simultaneously displayed on the display screen 22a (see FIG. 8), and is appropriately increased or decreased according to the size in the direction of the display screen 22a. Then, the divided image selection unit 50 selects the first to third divided images 45 at the time of the first selection, for example. Further, each time the display switching operation (see FIGS. 9 and 10) of the divided image 45 to be displayed on the display screen 22a is performed, the divided image selection unit 50 performs a new continuous in the horizontal direction according to the display switching operation. Select three. The divided image selection unit 50 outputs the three divided images 45 selected from the memory 27 to the inspection image generation unit 52. Further, the divided image selection unit 50 outputs the selection result of the divided image 45 to the correspondence information generation unit 51.

  As illustrated in FIG. 8, the correspondence information generation unit 51 performs X-ray fluoroscopy of the three divided images 45 selected by the divided image selection unit 50 based on the selection result of the divided images 45 input from the divided image selection unit 50. Correspondence information 55 indicating which part of the image 20 corresponds is generated. The correspondence information 55 includes an entire image 44 and display information 56 indicating portions corresponding to the three divided images 45 in the entire image 44. The correspondence information generation unit 51 obtains display information 56 based on the scale relationship between the X-ray fluoroscopic image 20 and the entire image 44 and the selection result of the divided image 45. Then, the correspondence information generation unit 51 generates correspondence information 55 based on the entire image 44 read from the memory 27 and the display information 56.

  The display information 56 displays, for example, portions corresponding to the three divided images 45 in the entire image 44 in a manner different from other portions. Note that the display mode is not particularly limited as long as it is possible to identify which part in the entire image 44 each of the three divided images 45 corresponds to. The correspondence information generation unit 51 outputs the correspondence information 55 to the inspection image generation unit 52.

  The inspection image generation unit 52 generates an inspection image 48 to be displayed on the display screen 22 a based on the three divided images 45 input from the divided image selection unit 50 and the correspondence information 55 input from the correspondence information generation unit 51. Generate.

  The inspection image 48 is divided into three divided into a divided image display area 59, an entire image display area 60, and an icon display area 61 along the vertical direction (second direction) in the drawing of the display screen 22a. The arrangement and size of the display areas 59 to 61 in the inspection image 48 are not particularly limited and may be appropriately changed.

  The inspection image generation unit 52 arranges the three divided images 45 that are continuous in the horizontal direction of the display screen 22 a in the vertical direction in the divided image display area 59. At this time, the inspection image generation unit 52 arranges the divided images 45 obtained by removing the above-described overlapping portions (see FIG. 7) in the divided image display area 59. Since the overlapping width of the overlapping portion of each divided image 45 is known, the inspection image generating unit 52 can remove the overlapping portion from each divided image 45. Thereby, the divided images 45 having sizes corresponding to the divided regions (1) to (8) can be arranged in the divided image display region 59. As a result, the left end of the first divided image 45 and the right end of the second divided image 45 indicate the same location, and the left end of the second divided image 45 and the right end of the third divided image 45 indicate the same location. Accordingly, in the divided image display area 59, portions corresponding to the divided areas (1) to (3) in the X-ray fluoroscopic image 20 are displayed in a folded manner. In addition, the dot display in the division | segmentation image 45 in the figure has shown the welding part 11a.

  Each divided image 45 in the divided image display area 59 is displayed in an identification mode (for example, a frame or a background color) corresponding to the display information 56. Thereby, it can be easily determined in which part in the X-ray fluoroscopic image 20 (overall image 44) each divided image 45 is located. Further, by generating the whole image 44 from the X-ray fluoroscopic image 20, it becomes clear which part of the X-ray fluoroscopic image 20 corresponds to each part of the whole image 44. It is possible to more easily determine which part of 20 is located.

  The inspection image generation unit 52 arranges the correspondence information 55 in the entire image display area 60. Further, the inspection image generation unit 52 arranges various icons such as a loupe screen display switching icon 63 for switching ON / OFF of display of a loupe screen described later and a scroll operation icon 64 for performing a scroll operation in the icon display area 61. To do. The icons 63 and 64 function as a graphical user interface (GUI).

  The inspection image generation unit 52 outputs the generated inspection image 48 to the display driver 30. The display driver 30 controls the monitor 22 to display the inspection image 48 on the display screen 22a.

<Divided image display switching operation>
Next, a display switching operation (also referred to as a scroll operation) of the divided image 45 displayed in the inspection image 48 will be described with reference to FIG. For example, when a left flick operation that traces the divided image display area 59 in the left direction in the drawing is detected by the touch panel 37, the divided image selection unit 50 operates. When the first to third divided images 45 are displayed in the divided image display area 59, the divided image selection unit 50 selects the fourth to sixth divided images 45 from the memory 27 and generates an inspection image. To the unit 52.

  In addition, the divided image selection unit 50 outputs the selection result of the fourth to sixth divided images 45 to the correspondence information generation unit 51. Based on the selection result of the fourth to sixth divided images, the correspondence information generating unit 51 newly includes the entire image 44 read from the memory 27 and display information 56 corresponding to each of the fourth to sixth divided images 45. Correspondence information 55 is generated. Then, the correspondence information generation unit 51 outputs the correspondence information 55 to the inspection image generation unit 52.

  The inspection image generation unit 52 creates a new inspection image 48 based on the fourth to sixth divided images 45 input from the divided image selection unit 50 and the new correspondence information 55 input from the correspondence information generation unit 51. The inspection image 48 is generated and output to the display driver 30. As a result, the fourth to sixth divided images 45 are displayed in the vertical direction in the divided image display area 59 and the correspondence information 55 in the entire image display area 60 is updated. As a result, in the divided image display area 59, portions corresponding to the divided areas (4) to (6) in the X-ray fluoroscopic image 20 are displayed in a folded manner. That is, the display range of the X-ray fluoroscopic image 20 displayed on the display screen 22a is scrolled by the left flick operation.

  Conversely, when the touch panel 37 detects a right flick operation that traces the divided image display area 59 in the right direction in the figure, the divided image selection unit 50 operates. For example, when the fourth to sixth divided images 45 are displayed in the divided image display area 59, the divided image selection unit 50 selects the first to third divided images from among the divided images 45 in the memory 27. 45 is selected. Thereby, a new inspection image 48 corresponding to the first to third divided images 45 is generated. Then, the first to third divided images 45 are displayed in the vertical direction in the divided image display area 59, and the display information 56 in the entire image display area 60 is updated. As a result, in the divided image display area 59, portions corresponding to the divided areas (1) to (3) in the X-ray fluoroscopic image 20 are displayed in a folded manner. That is, the display range of the X-ray fluoroscopic image 20 displayed on the display screen 22a is scrolled in the direction opposite to that at the time of the left flick operation described above by the right flick operation.

  In the present embodiment, the display range of the X-ray fluoroscopic image 20 displayed on the display screen 22a is scrolled by a scroll amount corresponding to three divided images 45 with one left / right flick operation. However, the scroll amount may be changed as appropriate. For example, the scroll amount corresponding to one divided image 45 can be set. In this case, if the left flick operation is performed while the first to third divided images 45 are displayed in the divided image display area 59, the second to fourth divided images are displayed in the divided image display area 59. 45 is displayed. In addition, when the right flick operation is performed while the fourth to sixth divided images 45 are displayed in the divided image display area 59, the third to fifth divided images 45 are displayed in the divided image display area 59. Is displayed.

  As shown in FIG. 10, in addition to the flick operation on the divided image display area 59, the display of the divided image 45 can be switched by operating the mouse 29. For example, when the mouse 29 is operated and a desired area in the whole image 44 is designated by the pointer 66, the divided image selection unit 50 operates. The divided image selection unit 50 selects three consecutive divided images 45 including the divided image 45 corresponding to the area designated by the pointer 66 from the memory 27. For example, when an area corresponding to the fifth divided image 45 in the entire image 44 is designated by the pointer 66, the divided image selection unit 50 selects the fifth to seventh divided images 45 from the memory 27. Accordingly, a new inspection image 48 corresponding to the fifth to seventh divided images 45 is displayed on the display screen 22a.

  The display of the divided image 45 can also be switched when the scroll operation icon 64 is designated by the pointer 66. For example, when the lower button of the scroll operation icon 64 is designated by the pointer 66, a display switching process similar to that performed when the above-described leftward flick operation is performed is performed. On the contrary, when the up button is designated by the pointer 66, the same display switching process as that in the case where the above-described right flick operation is performed is performed. Note that the display of the divided image 45 may be switched using the keyboard 28 instead of the mouse 29.

<Loupe screen display processing>
As shown in FIG. 11, the enlarged region designation unit 53 and the loupe screen generation unit 54 operate when the loupe screen display switching icon 63 is switched to ON display by the pointer 66. The enlarged area designating unit 53 displays the selection window 70 in the divided image display area 59. The selection window 70 can be moved to an arbitrary position in the divided image display area 59 by a drag operation using the touch panel 37 or a drag operation using the keyboard 28 or the mouse 29. The area specified in the selection window 70 corresponds to “a partial area of the divided image” of the present invention. The enlarged area designating unit 53 outputs position coordinate information 71 indicating the position of the selection window 70 in the divided image display area 59 to the loupe screen generating unit 54.

  The loupe screen generating unit 54 uses the position coordinate information 71 input from the enlarged region specifying unit 53 and the information on which divided image 45 the selection window 70 is displayed on, in the X-ray fluoroscopic image 20. A selection window corresponding region corresponding to the selection window 70 in FIG. Then, the loupe screen generation unit 54 extracts a region image 73 corresponding to the selection window corresponding region from the X-ray fluoroscopic image 20 stored in the image storage unit 35, and magnifies the region image 73 (enlarged image). ) 74 is superimposed on the inspection image 48. Thereby, the presence or absence of defects, such as the crack 76 and the bubble 77 of the welding part 11a, can be determined easily.

  Further, the loupe screen generation unit 54 displays the first scale 80 indicating the position of the selection window 70 (selected window corresponding area) in the X-ray fluoroscopic image 20 in the loupe screen 74 based on the determination result of the selected window corresponding area. To display. For example, when one end of the X-ray fluoroscopic image 20 on the divided region (1) side is the head, the first scale 80 indicates the distance from the head of the X-ray fluoroscopic image 20 to the selection window 70.

  Further, the loupe screen generator 54 causes the loupe screen 74 to display a second scale 81 that represents the actual size of the area in the loupe screen 74. The second scale 81 is obtained, for example, by acquiring an X-ray fluoroscopic image 20 including a marker having a known size in advance and measuring the size of the marker on the display screen 22a.

  The correspondence information generation unit 51, for example, the above-described position coordinate information 71, information on which divided image 45 the selection window 70 is displayed on, and a scale relationship between the known X-ray fluoroscopic image 20 and the entire image 44. Are used to determine the position of the selection window 70 in the entire image 44. Then, the correspondence information generation unit 51 displays a marker 83 indicating the position of the selection window 70 in the whole image 44 on the correspondence information 55.

<Operation of X-ray Inspection Apparatus of First Embodiment>
Next, the operation of the X-ray inspection apparatus 10 having the above configuration will be described with reference to FIG. First, it mounts | wears so that the imaging plate 14 may be wound around the outer peripheral surface of the welding part 11a (step S1). And after moving the X-ray source 13 to the position which opposes the internal peripheral surface of the welding part 11a by the radiation source drive device 18, X-ray | X_line 12 is radial toward the internal peripheral surface of the welding part 11a from the X-ray source 13. (Step S2). Thereby, the X-ray image information is accumulated in the imaging plate 14 (step S3). The imaging plate 14 is set on the imaging plate reader 15 after being removed from the welded portion 11a.

  The imaging plate reader 15 reads the X-ray image information accumulated in the imaging plate 14, generates an X-ray fluoroscopic image 20 of the welded part 11a based on this X-ray image information, and outputs it to the PC 16. The image input I / F 31 of the PC 16 stores the X-ray fluoroscopic image 20 acquired from the imaging plate reader 15 in the image storage unit 35 (step S4: image acquisition step). In the same manner, X-ray fluoroscopic images 20 for all the welds 11a to be inspected are acquired and stored in the image storage unit 35.

  Next, the image display program 34 is activated on the PC 16 (step S5). When the inspector selects the X-ray fluoroscopic image 20 to be inspected on the image display program 34, the CPU 25 makes a copy of the X-ray fluoroscopic image 20 selected by the inspector (hereinafter also referred to as X-ray fluoroscopic image 20). It acquires from the image memory | storage part 35 (step S6: Image acquisition process).

  The entire image generation unit 40 generates the entire image 44 by performing pixel thinning processing on the X-ray fluoroscopic image 20 acquired from the image storage unit 35 (step S7). This whole image 44 is temporarily stored in the memory 27.

  On the other hand, the divided image generation unit 41 generates N = 8 divided images 45 as shown in FIG. 7 from the X-ray fluoroscopic image 20 acquired from the image storage unit 35 (step S8: divided image generation step). , Split image generation processing). At this time, by generating the respective divided images 45 so that the end portions of the adjacent divided images 45 overlap each other, the portions (excluding the end portions) corresponding to the divided areas (1) to (8) of the divided image 45 are generated. It is possible to prevent the occurrence of pseudo scratches on the portion). Further, the divided image generation unit 41 performs pixel thinning processing on each divided image 45 to reduce the data amount of each divided image 45. Each divided image 45 is temporarily stored in the memory 27. After the divided image 45 is stored in the memory 27, the inspection image display process is started (step S9).

  As illustrated in FIG. 13, the divided image selection unit 50 selects the first to third divided images 45 from among the divided images 45 stored in the memory 27 and inspects the first to third divided images 45. It outputs to the image generation part 52 (step S10). Further, the divided image selection unit 50 outputs the selection result of the divided image 45 to the correspondence information generation unit 51.

  The correspondence information generation unit 51 determines a portion corresponding to each of the first to third divided images 45 in the entire image 44 based on the selection result of the divided images 45 input from the divided image selection unit 50. Then, the correspondence information generation unit 51 uses the whole image 44 read from the memory 27 and the display information 56 indicating the portions corresponding to the first to third divided images 45 in the whole image 44, and the correspondence information 55. Is generated (step S11). The correspondence information 55 is output to the inspection image generation unit 52.

  The inspection image generation unit 52 generates an inspection image 48 based on the first to third divided images 45 input from the divided image selection unit 50 and the correspondence information 55 input from the correspondence information generation unit 51. The image 48 is output to the display driver 30 (step S12). Thereby, the inspection image 48 is displayed on the display screen 22a (display control step, display control process).

  As shown in FIG. 8, the first to third divided images 45 are displayed in order in the vertical direction in the divided image display area 59. Thereby, the portions corresponding to the divided regions (1) to (3) in the X-ray fluoroscopic image 20 are displayed in a folded manner, so that more information can be displayed on the display screen 22a. For example, when three divided images 45 are displayed, three times as much information can be displayed on the display screen 22a as compared with the case where the X-ray fluoroscopic image 20 is displayed as it is.

  Further, by displaying the correspondence information 55 in the entire image display area 60, it is possible to easily determine which part in the X-ray fluoroscopic image 20 the first to third divided images 45 correspond to. Furthermore, in the present embodiment, the display mode (frame, background color, etc.) of each divided image 45 in the divided image display area 59 is made to correspond to the display information 56 of each divided image 45 in the entire image 44. . As a result, it is possible to more easily determine in which part in the X-ray fluoroscopic image 20 (entire image 44) each divided image 45 is located.

<Display switching (scrolling) processing>
Returning to FIG. 12, when the display in the divided image display area 59 is switched after the inspection image 48 is displayed, the left flick operation is executed in the divided image display area 59 (YES in step S13). When this left flick operation is detected on the touch panel 37, the above-described inspection image display process (step S9) is started again.

  The divided image selection unit 50 selects the fourth to sixth divided images 45 from the memory 27 and outputs the selected images to the inspection image generation unit 52, and the corresponding information generation unit 51 displays the selection result of the fourth to sixth divided images 45. Output to. The correspondence information generation unit 51 generates new correspondence information 55 including the whole image 44 and display information 56 indicating the portions corresponding to the fourth to sixth divided images 45 in the whole image 44. The information 55 is output to the inspection image generation unit 52.

  The inspection image generation unit 52 generates a new inspection image 48 based on the fourth to sixth divided images 45 input from the divided image selection unit 50 and the correspondence information 55 input from the correspondence information generation unit 51. The inspection image 48 is output to the display driver 30. As a result, a new inspection image 48 is displayed on the display screen 22a. Specifically, as shown in FIG. 9, the fourth to sixth divided images 45 are displayed in the vertical direction in the divided image display area 59 and the correspondence information 55 in the entire image display area 60 is updated. Is done. As a result, the display range of the X-ray fluoroscopic image 20 displayed on the display screen 22a is scrolled, and the portion corresponding to the divided areas (4) to (6) in the X-ray fluoroscopic image 20 in the divided image display area 59. Is displayed folded. Hereinafter, the display range of the X-ray fluoroscopic image 20 displayed on the display screen 22a is scrolled each time the left flick operation is performed.

  Conversely, when a right flick operation is performed, the display range of the X-ray fluoroscopic image 20 displayed on the display screen 22a is scrolled in the reverse direction, and the correspondence information 55 is updated accordingly. For example, when the right flick operation is performed in a state where the fourth to sixth divided images 45 are displayed in the divided image display area 59, the first to third divided images 45 are displayed in the divided image display area 59. Displayed side by side in the vertical direction, correspondence information 55 corresponding to the first to third divided images 45 is displayed in the entire image display area 60.

  As shown in FIG. 10, even when the mouse 29 is operated and a desired area in the whole image 44 is designated by the pointer 66, or when the scroll operation icon 64 is designated by the pointer 66, the divided image display is performed. The display of the divided image 45 in the area 59 is switched, and the correspondence information 55 in the entire image display area 60 is updated.

  In this embodiment, since the data amount of each divided image 45 is reduced by performing a thinning process on each divided image 45, the display switching response is improved when a display switching operation such as a flick operation is performed. Can be made.

<Loupe screen display processing>
When the inspector enlarges and displays a part of the divided image 45 displayed in the divided image display area 59, the inspector performs a loupe screen display operation for switching the loupe screen display switching icon 63 to ON display by operating the mouse 29. Execute (NO in step S13, YES in step S14). Thereby, a loupe screen display process is started (step S15).

  As shown in FIG. 14, the enlarged region designation unit 53 displays the selection window 70 in the divided image display region 59 and outputs position coordinate information 71 of the selection window 70 to the loupe screen generation unit 54 (step S17). ).

  The loupe screen generation unit 54 generates a position in the X-ray fluoroscopic image 20 based on the position coordinate information 71 input from the enlarged region designation unit 53 and information on which divided image 45 the selection window 70 is displayed on. A selection window corresponding area corresponding to the selection window 70 is determined (step S18). Next, the loupe screen generation unit 54 extracts a region image 73 corresponding to the selection window corresponding region from the X-ray fluoroscopic image 20 in the image storage unit 35 (step S19). Then, the loupe screen generation unit 54 superimposes and displays the loupe screen 74 in which the region image 73 is enlarged on the inspection image 48 (step S20). At this time, the loupe screen generation unit 54 displays the first scale 80 and the second scale 81 in the loupe screen 74 based on information such as the determination result of the selection window corresponding region and the enlargement ratio of the loupe screen 74. (Step S21).

  As shown in FIG. 11, by enlarging and displaying on the loupe screen 74 a portion that is determined to contain a defect such as a crack 76 or a bubble 77 in the divided image 45. Presence / absence can be easily determined. Further, by displaying the first scale 80, for example, when a defect is found in the loupe screen 74, it is possible to easily determine where the defect is located in the X-ray fluoroscopic image 20. Thereby, the position of the defect in the welding part 11a can be specified easily. Furthermore, by displaying the second scale 81, for example, when a defect is found in the loupe screen 74, the actual size of the defect can be determined.

  Hereinafter, the loupe screen display process continues until the inspector operates the mouse 29 to switch the loupe screen display switching icon 63 to OFF display (YES in step S22). When the inspector moves the selection window 70 using the mouse 29 or the like, the above-described processing from step S17 to step S21 is repeated, so that the loupe screen 74 corresponding to the new selection window 70 is inspected. Overlaid on top. When the inspector operates the mouse 29 to switch the loupe screen display switching icon 63 to the OFF display (NO in step S22), the loupe screen display process ends.

  Returning to FIG. 12, until the inspection of the X-ray fluoroscopic image 20 (each divided image 45) selected by the inspector is completed, the processing from the above-described step S9 to step S22 is repeatedly executed (NO in step S23). . When another X-ray fluoroscopic image 20 is inspected, the processes from step S9 to step S22 described above are repeatedly executed (YES in step S23, YES in step S24). Further, when the other X-ray fluoroscopic images 20 are not inspected, all the processes are completed (NO in step S24).

<Operational effect of the X-ray inspection apparatus of the first embodiment>
Thus, in the present invention, the X-ray fluoroscopic image 20 is displayed more than before by displaying the divided image 45 of the long X-ray fluoroscopic image 20 and the corresponding information 55 corresponding to the divided image 45 on the display screen 22a. It can be displayed efficiently. In particular, as the number of divided images 45 displayed on the display screen 22a increases, the information that can be confirmed at one time on one screen increases, so that the entire X-ray fluoroscopic image 20 can be displayed more efficiently. As a result, the entire X-ray fluoroscopic image 20 can be easily grasped, and the troublesome scrolling operation of the X-ray fluoroscopic image 20 can be reduced as compared with the conventional case. Further, by displaying the divided image 45 instead of the X-ray fluoroscopic image 20, abnormalities such as defects are displayed as compared with the case where the entire X-ray fluoroscopic image 20 is displayed on the display screen 22 a by the reduction process or the thinning process. The location can be displayed in the display screen 22a at a magnification that allows easy identification.

[X-ray inspection apparatus of the second embodiment]
Next, an X-ray inspection apparatus according to the second embodiment of the present invention will be described. In the first embodiment, the X-ray fluoroscopic image 20 is acquired with the X-ray source 13 set on the central axis of the pipe 11. On the other hand, as shown in FIG. 15, when the inspector manually sets the X-ray source 13 on the central axis of the pipe 11, the position of the X-ray source 13 is shifted from the central axis of the pipe 11. There is. In this case, a difference occurs in the X-ray image information stored in the imaging plate 14 in accordance with the distance from the X-ray source 13, so that the X-ray fluoroscopic image 20 is uneven. When such X-ray fluoroscopic image 20 is subjected to image processing with the same parameters, an easy-to-see part and a difficult-to-see part are generated in X-ray fluoroscopic image 20. As a result, some of the divided images 45 generated from the X-ray fluoroscopic image 20 are difficult to see.

  Therefore, as shown in FIG. 16, in the X-ray inspection apparatus 85 of the second embodiment, for each divided image 45, an image for correcting unevenness due to variation in the distance from the X-ray source 13 to the imaging plate 14. Correction processing (also referred to as automatic sensitivity correction processing (EDR processing)) is performed. The X-ray inspection apparatus 85 has basically the same configuration as the X-ray inspection apparatus 10 of the first embodiment except that the CPU 25 functions as a divided image correction processing unit (image correction unit) 87. For this reason, the same reference numerals are given to the same functions and configurations as those in the first embodiment, and the description thereof is omitted.

  The divided image correction processing unit 87 performs image correction on each divided image 45 so that the density of the region corresponding to the non-welded portion 11b (see FIG. 2) in each divided image 45 becomes a predetermined reference density. Processing (for example, contrast normalization processing) is performed.

<Image correction processing of divided images>
As shown in FIGS. 17 and 18, the divided image correction processing unit 87 operates after each divided image 45 generated by the divided image generating unit 41 is stored in the memory 27 (step S26). The divided image correction processing unit 87 reads the first divided image 45 from the memory 27 (steps S27 and S28). The divided image correction processing unit 87 detects the density in the divided image 45. Specifically, the divided image correction processing unit 87 detects the density of the welded part region 45a corresponding to the welded part 11a in the divided image 45 and the density of the non-welded part region 45b corresponding to the non-welded part 11b ( Step S29). At this time, the divided image correction processing unit 87 detects the density of a plurality of measurement points P (for example, four corners of the divided image 45) in the non-welded part region 45b.

  Here, the thickness of each part of the pipe 11 before welding is basically uniform. For this reason, since the non-welded part 11b has a uniform thickness, it corresponds to a uniform part of the present invention. Moreover, since the thickness of the welding part 11a becomes non-uniform | heterogenous in the case of welding, it corresponds to the non-uniform | heterogenous part of this invention. Therefore, the welded portion region 45a corresponds to the non-uniform region of the present invention, and the non-welded portion region 45b corresponds to the uniform region of the present invention.

  The divided image correction processing unit 87 sets the representative value (for example, average value) of the density of each measurement point P as the density of the non-welded part region 45b. Next, the divided image correction processing unit 87 performs image correction processing on the welded part region 45a and the non-welded part region 45b (first divided image 45) so that the density of the non-welded part region 45b becomes the above-described reference density. (Steps S30, S30a, S30b). As a result, the density of the non-welded area 45b is corrected to the reference density, and the density of the welded area 45a is corrected to a relative density with respect to the reference density. The divided image 45 subjected to the image correction process is stored in the memory 27 as the first corrected divided image 46 (step S31).

  Similarly, the divided image correction processing unit 87 generates the second to eighth corrected divided images 46 by performing image processing on the remaining second to eighth divided images 45 in the memory 27, respectively. These corrected divided images 46 are stored in the memory 27 (steps S32 and S33).

  The density of each non-welded part region 45b of the first to eighth corrected divided images 46 is uniform at the reference density. Here, when the position of the X-ray source 13 is set on the central axis of the pipe 11, the density of the non-welded part region 45 b of each divided image 45 is uniform. For this reason, even when the position of the X-ray source 13 is deviated from the central axis of the pipe 11, the image correction processing by the divided image correction processing unit 87 is performed so that the position of the X-ray source 13 is on the central axis of the pipe 11. The first to eighth corrected divided images 46 equivalent to the case of being set to are obtained. As a result, in each corrected divided image 46, the occurrence of unevenness due to variations in the distance from the X-ray source 13 to the imaging plate 14 is prevented, and the image quality becomes uniform. Therefore, each corrected divided image 46 that can be easily viewed by the inspector is obtained.

  The inspection image generation unit 52 generates the inspection image 48 shown in FIGS. 8 to 11 and the like based on each corrected divided image 46 stored in the memory 27. Since processing other than the image correction processing by the divided image correction processing unit 87 is basically the same as that in the first embodiment, a detailed description thereof will be omitted.

[X-ray inspection apparatus of the third embodiment]
Next, an X-ray inspection apparatus 90 according to the third embodiment of the present invention will be described with reference to FIG. In the first embodiment, the entire image 44 and the divided image 45 are generated when the inspector inspects the X-ray fluoroscopic image 20 acquired in advance, but the X-ray inspection apparatus 90 acquires the X-ray fluoroscopic image 20. In this case, the whole image 44 and the divided image 45 are generated. The X-ray inspection apparatus 90 generates an entire image 44 and a divided image 45 in which data (pixels) are thinned out according to the characteristics of the display screen 22a (monitor 22).

  The X-ray inspection apparatus 90 includes a CPU 91 and an image storage unit (long image storage unit, whole image storage unit, divided image storage unit) 92 different from the first embodiment, and an image acquisition / display program in the storage 26. Except for the point where 93 is stored, the configuration is basically the same as that of the X-ray inspection apparatus 10 of the first embodiment. For this reason, the same reference numerals are given to the same functions and configurations as those in the first embodiment, and the description thereof is omitted. The image acquisition / display program 93 corresponds to the image display program of the present invention.

  When the image acquisition / display program 93 is activated, the CPU 91 executes a process according to the image acquisition / display program 93 to thereby obtain a monitor characteristic acquisition unit (characteristic acquisition unit) 95, an entire image generation unit (overall) The image generation unit 96 functions as a divided image generation unit (divided image generation unit) 97, an image acquisition unit 98, and the display control unit 42 described above.

  The monitor characteristic acquisition unit 95 acquires monitor characteristics (display means characteristics) including at least one of resolution and gradation reproducibility (number of bits, etc.) of the display screen 22a of the monitor 22. For example, when the monitor characteristic is stored in the monitor 22, the monitor characteristic can be acquired from the monitor 22. When the monitor characteristic is not stored in the monitor 22, the monitor characteristic is acquired from a monitor characteristic database (not shown) created in advance by determining the model of the monitor 22. The monitor characteristic information is output to the whole image generation unit 96 and the divided image generation unit 97, respectively.

  The whole image generation unit 96 operates when the X-ray fluoroscopic image 20 is stored in the image storage unit 92. The whole image generation unit 96 generates a whole image 44 by performing a thinning process on the X-ray fluoroscopic image 20 based on the monitor characteristics. For example, the entire image generation unit 96 has a display size of the entire image 44 smaller than the screen size H1 (see FIG. 6) of the display screen 22a determined by the monitor characteristics and the display screen 22a determined by the monitor characteristics. Thinning-out processing is performed on the fluoroscopic image 20 so that the number of bits of the entire image 44 is smaller than the number of bits. The entire image 44 is stored in the image storage unit 92 in a state associated with the original X-ray fluoroscopic image 20.

  The divided image generation unit 97 operates when the X-ray fluoroscopic image 20 is stored in the image storage unit 92. The divided image generation unit 97 generates a divided image 45 obtained by dividing the X-ray fluoroscopic image 20 into a plurality based on the monitor characteristics. For example, the divided image generation unit 97 generates the divided image 45 with a display size equal to or smaller than the screen size H1 of the display screen 22a determined by the monitor characteristics. In addition, the divided image generation unit 97 performs a thinning process on each divided image 45 so that the number of bits of the divided image is smaller than the number of bits of the display screen 22a determined by the monitor characteristics. Each divided image 45 is stored in the image storage unit 92 in a state associated with the original X-ray fluoroscopic image 20.

  When the X-ray fluoroscopic image 20 to be inspected is selected on the image acquisition / display program 93, the image acquisition unit 98 acquires the entire image 44 and the divided image 45 corresponding to the X-ray fluoroscopic image 20 and acquires the memory 27. Memorize temporarily.

  Similar to the first embodiment, the display control unit 42 generates the inspection image 48 shown in FIGS. 8 to 11 based on the entire image 44 and the divided image 45 stored in the memory 27, and this inspection image. 48 is output to the display driver 30. Thereby, the inspection image 48 is displayed on the display screen 22a.

<Operation of X-ray Inspection Apparatus of Third Embodiment>
The operation of the X-ray inspection apparatus 90 configured as described above will be described with reference to FIG. Note that the processing from step S1 to step S4 is basically the same as that in the first embodiment shown in FIG. However, in the X-ray inspection apparatus 90, when the X-ray fluoroscopic image 20 is captured from the imaging plate reader 15 to the PC 16, the image acquisition / display program 93 is activated. After the start of the image acquisition / display program 93, the monitor characteristic acquisition unit 95 of the CPU 91 acquires the monitor characteristic of the display screen 22a from the monitor 22 or the above-described monitor characteristic database, and this monitor characteristic information is transmitted to the entire image generation unit 96. It outputs to the divided image generation part 97 (step S3-1).

  After step S4, the entire image generation unit 96 reads the X-ray fluoroscopic image 20 (replicated) from the image storage unit 92. Next, the whole image generation unit 96 performs a thinning process corresponding to the monitor characteristics on the X-ray fluoroscopic image 20 to generate the whole image 44, and the whole image 44 is associated with the X-ray fluoroscopic image 20. It memorize | stores in the memory | storage part 92 (step S36).

  Further, the divided image generation unit 97 reads the X-ray fluoroscopic image 20 (replicated) from the image storage unit 92. Then, the divided image generation unit 97 divides the X-ray fluoroscopic image 20 into a plurality based on the monitor characteristics, and generates a divided image 45 having a display size equal to or smaller than the screen size H1 of the display screen 22a. Next, the divided image generation unit 97 performs the thinning process corresponding to the monitor characteristics on each divided image 45, and then stores each divided image 45 in the image storage unit 92 in a state associated with the X-ray fluoroscopic image 20 (step). S37).

  Thereafter, each time the X-ray fluoroscopic image 20 is acquired from the imaging plate reading device 15 until the inspection by the inspector is started, the processes of steps S4, S36, and S37 described above are repeatedly executed (steps). NO in S38).

  When a predetermined inspection start operation is executed on the image acquisition / display program 93 and the X-ray fluoroscopic image 20 to be inspected is selected, the image acquisition unit 98 and the display control unit 42 of the CPU 91 are operated (steps). YES in S38). The image acquisition unit 98 reads the entire image 44 and the divided image 45 corresponding to the X-ray fluoroscopic image 20 selected on the image acquisition / display program 93 from the image storage unit 92 and stores them in the memory 27 (step S39). .

  The display control unit 42 executes inspection image display processing such as generation and output of the inspection image 48, display switching processing, and loupe screen display processing as shown in FIGS. 12 to 14 (step S40). When another X-ray fluoroscopic image 20 is inspected, the processes from step S39 to step S40 described above are repeatedly executed (YES in step S41). Further, when the other X-ray fluoroscopic images 20 are not inspected, all the processes are completed (NO in step S41).

<Operational Effect of X-ray Inspection Apparatus of Third Embodiment>
As described above, in the X-ray inspection apparatus 90 according to the third embodiment, since the entire image 44 and the divided image 45 are generated in advance before the start of the inspection (such as when obtaining an X-ray fluoroscopic image), The waiting time until the inspection image 48 is displayed on the display screen 22a after the selection of the object is reduced. In addition, by applying the thinning process corresponding to the monitor characteristics to the entire image 44 and the divided image 45, the data amount of the entire image 44 and the divided image 45 can be reduced. As a result, the amount of data processing required to generate and display the inspection image 48 can be reduced, so that the waiting time until the inspection image 48 is displayed on the display screen 22a can be further shortened.

[Others]
In each of the above embodiments, the case where the inspection image 48 is formed to be long in the horizontal direction (first direction) of the display screen 22a has been described. However, for example, each direction other than the horizontal direction such as the vertical direction (first direction) It may be long in this direction. In this case, the divided images 45 are arranged side by side in a direction (second direction) perpendicular to the new first direction.

  In each of the above-described embodiments, the X-ray fluoroscopic image 20 is divided into eight to generate eight divided images 45, but corresponding to the screen size H1 of the display screen 22a and the display size H2 of the X-ray fluoroscopic image 20. N (N is a natural number of 2 or more) divided images 45 may be generated. In each of the above embodiments, three divided images 45 are displayed in the inspection image 48. However, the number of display of the divided images 45 is not particularly limited, and M (2 ≦ M ≦ N). The divided image 45 may be displayed. In particular, when N = 3 or more divided images 45 are generated due to the X-ray fluoroscopic image 20 being long, by displaying M = 2 or more divided images 45 on the display screen 22a, X The fluoroscopic image 20 can be displayed more efficiently. Note that “M” is appropriately increased or decreased according to the screen size of the display screen 22a (for example, the vertical screen size in the present embodiment).

  In the first embodiment, the divided image generation unit 41 performs pixel thinning processing on each divided image 45, but the display size, data amount, number of pixels, and the like of the divided image 45 are predetermined threshold values. If it is smaller than this, the thinning-out process may not be performed.

  In each of the above embodiments, the entire image 44 is generated from the X-ray fluoroscopic image 20. However, for example, an image prepared in advance such as a bar image representing the entire X-ray fluoroscopic image 20 may be used as the entire image 44. Good. Thereby, the processing amount of image processing can be reduced. Particularly in the first and second embodiments, the waiting time until the inspection image 48 is displayed can be shortened.

  In each of the above-described embodiments, the X-ray inspection apparatus that obtains the X-ray fluoroscopic image 20 of the welded portion 11a of the pipeline has been described. However, X-ray fluoroscopic images (long images) of objects to be inspected other than the welded portion 11a. The present invention can also be applied to an X-ray inspection apparatus that obtains (1). The present invention can also be applied to various inspection apparatuses that obtain a fluoroscopic image (long image) of an object to be inspected using various electromagnetic waves other than X-rays. Note that the long image of the present invention is not limited to a fluoroscopic image of an object to be inspected, and may be a photographed image photographed by various photographing apparatuses, for example.

  In each of the above-described embodiments, the PC 16 corresponding to the image display device of the present invention acquires the X-ray fluoroscopic image 20 from the imaging plate reading device 15. For example, the X 16 is transmitted via a recording medium such as a communication network or a memory card. The present invention can also be applied when a long image such as the fluoroscopic image 20 is acquired. In this case, an interface for acquiring a long image is the image acquisition means of the present invention. Also, the present invention can be applied when an image display device other than a PC is used.

  DESCRIPTION OF SYMBOLS 10, 85, 90 ... X-ray inspection apparatus, 11 ... Pipe, 11a ... Welding part, 14 ... Imaging plate, 15 ... Imaging plate reader, 16 ... Personal computer (PC), 20 ... X-ray fluoroscopic image, 22 ... Monitor , 25... CPU, 34... Image display program, 35... Image storage unit, 40... Entire image generation unit, 41. Image selecting unit 51... Corresponding information generating unit 52. Inspection image generating unit 53. Enlarged region specifying unit 54. Loupe screen generating unit 55. Corresponding information 56. Display information 74. Image correction processing unit, 95... Monitor characteristic acquisition unit

Claims (14)

Display means for displaying images;
Image acquisition means for acquiring a long image whose display size in the first direction on the display screen of the display means is longer than the screen size in the first direction of the display screen;
Divided image generating means for dividing the long image into a plurality of divided images in the first direction and generating a plurality of divided images that can be displayed in the display screen;
Display control means for displaying on the display screen at least one of the divided images and correspondence information indicating which part of the long image the divided image corresponds to;
An image display device comprising: The long image is divided into N (N is a natural number of 2 or more) divided images,
A divided image selection means for selecting M (2 ≦ M ≦ N) pieces of the divided images that are continuous in the first direction from the N pieces of divided images;
2. The display control unit according to claim 1, wherein the M pieces of divided images selected by the divided image selection unit are displayed side by side in a second direction perpendicular to the first direction on the display screen. Image display device. Comprising an operation receiving means for receiving a switching operation for switching the divided images displayed on the display screen;
The image display device according to claim 2, wherein the divided image selecting unit selects the M divided images corresponding to the switching operation when the switching operation is received by the operation receiving unit.   The display control means, as the correspondence information, to which part of the whole image the whole image representing the whole of the long image in the display screen and the divided image displayed on the display screen correspond 4. The image display device according to claim 1, wherein display information indicating the image is displayed on the display screen. 5.   The image display device according to claim 4, further comprising a whole image generating unit that generates the whole image from the long image. The whole image is generated by thinning out pixels of the long image,
A characteristic acquisition means for acquiring characteristics of the display means including at least one of resolution and gradation reproducibility of the display screen;
The whole image generation means generates the whole image of the pixel thinning amount corresponding to the characteristic based on the characteristic acquired by the characteristic acquisition means in advance and stores it in the whole image storage means.
The image display device according to claim 5, wherein the display control unit displays the entire image acquired from the entire image storage unit on the display screen. The divided image is generated by thinning out pixels of a portion corresponding to the divided image in the long image,
The divided image generation unit generates the divided image of the pixel thinning amount corresponding to the characteristic based on the characteristic acquired by the characteristic acquisition unit and stores the divided image in the divided image storage unit,
The image display device according to claim 6, wherein the display control unit displays the divided image acquired from the divided image storage unit on the display screen. A long image storage means for storing the long image acquired by the image acquisition means;
Area designating means for designating a partial area of the divided image displayed on the display screen,
The display control unit extracts a region image corresponding to the partial region specified by the region specifying unit from the long image stored in the long image storage unit, and based on the region image The image display device according to claim 1, wherein an enlarged image of the partial area is displayed on a display screen.   The image display device according to claim 8, wherein the display control unit displays a first scale representing a position of the partial region in the long image in the enlarged image.   The image display device according to claim 8, wherein the display control unit displays a second scale representing the size of the partial area in the enlarged image.   The said image acquisition means acquires the said elongate image produced | generated based on the detected value of the detector which detects the electromagnetic wave which irradiated to this to-be-inspected object and permeate | transmitted this to-be-inspected object. The image display device according to item. The object to be inspected includes a uniform portion having a uniform thickness and a non-uniform portion having a non-uniform thickness.
Each of the plurality of divided images generated by the divided image generation means includes a uniform region corresponding to the uniform portion and a non-uniform region corresponding to the non-uniform portion,
Image correction means for correcting the density of the uniform area in the plurality of divided images generated by the divided image generation means to a reference density and correcting the density of the non-uniform area to a density relative to the reference density; Prepared,
The image display device according to claim 11, wherein the display control unit displays the divided image whose density has been corrected by the image correction unit on the display screen. An image acquisition step of acquiring a long image whose display size in the first direction on the display screen of the display means for performing image display is longer than the screen size in the first direction of the display screen;
A divided image generating step of dividing the long image acquired in the image acquiring step into a plurality of divided images in a size that can be displayed in the display screen by dividing the long image into a plurality of the first direction;
The display screen displays at least one of the plurality of divided images generated in the divided image generation step and correspondence information indicating which part of the long image the divided image corresponds to. Display control steps to be displayed;
An image display method comprising: The long image is stored in a long image storage unit that stores a long image whose display size in the first direction on the display screen of the display unit that performs image display is longer than the screen size in the first direction of the display screen. Image acquisition processing for acquiring images;
A divided image generation process for dividing the long image acquired in the image acquisition process into a plurality of divided images in the first direction, and generating a plurality of divided images that can be displayed in the display screen;
The display screen displays at least one of the plurality of divided images generated by the divided image generation processing and correspondence information indicating which part of the long image the divided image corresponds to. Display control processing to be displayed;
An image display program that causes a computer to execute.

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