JP5930627B2 - An image processing apparatus, an image processing method, and a program for causing a computer to execute image processing. - Google Patents

Description

  The present invention relates to an image processing apparatus, an image processing method, and a program that causes a computer to execute image processing.

  As a conventional image processing apparatus for images and figures, for example, an image processing apparatus including a display screen on which a map image is displayed and an operation menu is known as in Patent Document 1. Patent Document 1 discloses a technique for performing an image operation on a map image by an image operation method selected from an operation menu.

  In general, in an apparatus that displays an image or figure, an object that can perform image operations such as enlargement, reduction, rotation, inversion, and parallel movement on the target image or figure, or an interest on the target image or figure. There are many things that can set the area.

  Further, in general, rotation and inversion of an image are performed with reference to the center of the region of interest, the center of the image, or the center of the region where the image is displayed.

  For example, FIG. 16 is a diagram for explaining a case where the image is inverted with reference to the center of the region of interest. Here, 501 is an area where an image is displayed, 502 is an image, 503 is a region of interest, and 505 is the center of the region of interest 503. For easy understanding, the region of interest 502 is divided into four equal parts, and each region is numbered. Now, the person watching the image pays attention to the position of “4” in the region of interest. However, if the image is flipped horizontally with respect to the center 505, “3” of the region of interest is displayed in the display region 501. "Is displayed, and an image different from the image of interest is displayed.

  FIG. 17 is a diagram for explaining the case where the image is rotated with reference to the center of the region of interest. In the drawing, the same reference numerals as those already described indicate the same or substantially the same parts, and the description thereof is omitted. Now, the person watching the image focuses on the position of “4” in the region of interest. However, if the image is rotated 90 degrees to the right with respect to the center 505, the display region 501 contains the region of interest. Of these, “1” is mainly displayed, and an image different from the image of interest is displayed.

JP 10-254355 A

  As described above, when the image is reversed or rotated, there is a problem that the region of interest that has been previously displayed in the image display region is out of the image display region.

  One of the purposes of the present case is to prevent the region of interest displayed in the image display area from deviating from the image display area even when the image is rotated or reversed.

  In addition, the present invention is not limited to the above-described object, and is a function and effect derived from each configuration shown in the embodiment for carrying out the present invention, which is another object of the present invention. It can be positioned as one.

This image processing apparatus is displayed on a region of interest setting means for setting a region of interest on an image and on a display means for displaying at least a part of the image of the region of interest when the region of interest is set. that the center of the area is determined as a reference point, when the process of translating the said image is performed on the image, change according to the position of the reference point to the amount of moving parallel the image, the When the process of enlarging or reducing the image is performed on the image, the reference point is newly determined, and the process of inverting and rotating the image is performed on the image includes determining means for maintaining a previously determined reference point, in accordance with the instruction by the user, the processing of inverting the image based on the reference point, the processing of rotating the image based on the reference point, before Enlarged or reduced to process the image, and and an image processing means for selectively performing a process to translate the image on the image.

Further, the present image processing method includes a region of interest setting step for setting a region of interest on an image, and display means for displaying at least a part of the image in the region of interest when the region of interest is set. When the center of the area to be displayed is determined as a reference point and the process of translating the image is performed on the image, the position of the reference point is changed according to the amount of translation of the image. When the process of enlarging or reducing the image is performed on the image, the reference point is newly determined, the process of inverting and rotating the image is performed on the image In this case, a setting step for maintaining the previously determined reference point, a process for inverting the image based on the reference point, and a process for rotating the image based on the reference point according to an instruction from the user. , And an image processing step of selectively performed for the process of moving parallel processing and the image is enlarged or reduced the image the image.

  According to the present invention, it is possible to prevent the region of interest displayed in the image display area from deviating from the image display area even when the image is rotated or reversed.

It is a figure which shows typically an example of a structure of a X-ray imaging system. It is a figure which shows the example of a display means display. It is a flowchart for demonstrating an example of the operation | movement which displays an image on a display means. It is a flowchart for demonstrating an example of the operation | movement which sets a region of interest to an image. It is a flowchart for demonstrating an example of operation | movement of the image processing apparatus in the case of performing image processing with respect to an image. It is a figure for demonstrating an example of the operation | movement which reverses the image horizontally based on a reference point. It is a figure for demonstrating an example of the operation | movement which reverses the image horizontally based on a reference point. It is a figure for demonstrating an example of the operation | movement which flips an image horizontally based on the center of a region of interest. It is a figure for demonstrating an example of the operation | movement which rotates an image based on a reference point. It is a figure for demonstrating an example of the operation | movement which rotates an image based on a reference point. It is a figure for demonstrating an example of the operation | movement which rotates an image based on the center of a region of interest. It is a figure for demonstrating the case where a reference point is calculated | required also when an image is reversed. It is a figure for demonstrating the case where a reference point is not calculated | required when an image is reversed. It is a figure for demonstrating the case where a reference point is calculated | required also when an image is rotated. It is a figure for demonstrating the case where a reference point is not calculated | required when an image is rotated. It is a figure for demonstrating the case where an image is reversed on the basis of the center of the region of interest. It is a figure for demonstrating the case where an image is rotated on the basis of the center of the region of interest.

Hereinafter, an example of an embodiment will be described with reference to the drawings. Hereinafter, a case will be described in which the present invention is applied to an X-ray imaging system that performs image processing of a radiographic image by X-rays. However, the present invention is not limited to the case of processing an X-ray radiation image, and can be used for processing of other images.

  FIG. 1 is a diagram schematically showing an example of the configuration of the X-ray imaging system according to the present embodiment. The X-ray imaging system includes an X-ray imaging apparatus 100, an image processing apparatus 101, display means 106, and instruction means 107.

  The X-ray imaging apparatus 100 captures a radiographic image by irradiating a subject with X-rays.

  The instruction unit 107 sends various instructions to the image processing apparatus 101. For example, the instruction unit 107 issues an instruction for setting a region of interest and various image processing instructions such as inversion and rotation for the image displayed on the display unit 106. The instruction means 107 is, for example, a mouse.

  The display unit 106 displays various images such as a radiographic image captured by the X-ray imaging apparatus 100. That is, the display unit 106 displays at least a part of the image. The display means 106 is a monitor, for example.

  The image processing apparatus 101 performs various processes on the image captured by the X-ray imaging apparatus 100 and displays the image on a display unit 106 such as a monitor. The image processing apparatus 101 is composed of, for example, a general personal computer (PC).

  The image processing apparatus 101 includes an image acquisition unit 102, a reference point determination unit 103, a region of interest setting unit 104, and a display control unit 105.

  The image acquisition unit 102 acquires a radiographic image captured by the X-ray imaging apparatus 100.

  The region-of-interest setting unit 104 sets a region of interest for the radiographic image acquired by the image acquisition unit 102. For example, the region-of-interest setting unit 104 sets a region of interest for the image acquired by the image acquisition unit 102 in response to an instruction from the instruction unit 107. That is, the region designated by the operator is set as the region of interest.

  The region-of-interest setting unit 104 may set a predetermined region of the image acquired by the image acquisition unit 102 as the region of interest regardless of the instruction from the instruction unit 107. Note that the region-of-interest setting unit 104 may set an X-ray irradiation field region as a region of interest. Furthermore, the region-of-interest setting unit 104 may set the region of interest according to the type of image acquired by the X-ray imaging apparatus 100 (for example, the type of hand image, chest image, or the like). The region-of-interest setting unit 104 may set the entire radiographic image acquired by the image acquisition unit 102 as the region of interest. That is, the region of interest setting means sets the region of interest on the image. The processing performed by the region of interest setting unit 104 corresponds to an example of the region of interest setting process.

  The reference point determining unit 103 determines the center of the region displayed on the display unit 106 by the display control unit 105 among the regions of interest set by the region of interest setting unit 104 as a reference point. Specifically, the center coordinate of the region of interest displayed on the display means 106 is determined as the reference point. Here, the coordinates are coordinates on the display means 106. The “center” in this case is a concept including the case of a complete center and the case of a substantially center. The reference point determination unit 103 sets the determined reference point in the display control unit 105, for example.

  When the instruction unit 107 instructs to invert the radiation image, and the radiation image is inverted, the reference point determination unit 103 does not newly determine the reference point and maintains the previously set reference point. The same applies to the case where the instruction unit 107 instructs to rotate the radiation image. That is, when the instruction unit 107 instructs to invert and rotate the radiation image, the reference point determination unit 103 does not newly determine a reference point.

  When the region of interest is set by the region-of-interest setting unit 104, the reference point determination unit 103 determines a reference point. Further, when the instruction unit 107 instructs to translate the radiographic image and the radiographic image is translated, the reference point determination unit 103 newly determines a reference point. Further, when the instruction unit 107 instructs to enlarge / reduce the radiographic image, and the radiographic image is enlarged / reduced, the reference point determination unit 103 newly determines a reference point. Note that the translation does not include rotation and inversion.

  That is, the reference point determination unit 103 displays at least a part of the image of the region of interest when the region of interest is set and when processing other than the processing of inverting and rotating the image is performed on the image. The center of the area displayed on the display means is determined as a reference point, while the process of inverting and rotating the image is performed on the image, the determination means for maintaining the previously determined reference point It corresponds to an example. The processing performed by the reference point determination unit 103 corresponds to an example of a determination process.

  The display control unit 105 causes the display unit 106 to display the image acquired by the image acquisition unit 102.

  The display control unit 105 includes an image processing unit 105-1.

  The image processing unit 105-1 performs image processing in accordance with an instruction input from the instruction unit 107. Specifically, the type of image processing input from the instruction unit 107 is determined, and image processing is performed. For example, when an instruction to rotate the image 90 degrees to the right is input from the instruction unit 107, the image processing unit 105-1 performs a process of rotating the radiation image 90 degrees to the right about the reference point. When an instruction to reverse the image from the instruction unit 107 is input to the radiation image, the image processing unit 105-1 performs a process for horizontally inverting the image about a straight line passing through the reference point. Further, when an instruction to translate the image is input from the instruction unit 107, the image processing unit 105-1 performs a process of translating the image on the radiation image. That is, the image processing unit 105-1 selectively performs an image reversal process based on the reference point, a process for rotating the image based on the reference point, and a process for translating the image on the image. Further, the image processing unit 105-1 performs a process of rotating the image around the reference point, and performs a process of inverting the image around a straight line passing through the reference point. Note that the processing performed by the image processing unit 105-1 corresponds to an example of an image processing step.

  FIG. 2 is a view showing a display example of the display means 106. Since the same reference numerals as those already described indicate the same or substantially the same parts, the description thereof is omitted. The display unit 106 displays an image display area 501 for displaying an image such as a radiation image and an operation menu display area 401. In the following drawings, the operation menu display area 401 is not shown for simplicity. Here, in general, the radiographic image 502 is displayed so as to be within the image display area 501 as shown in FIG. 2 when the image is displayed for the first time so that the entire image can be confirmed in the X-ray imaging system. A region of interest 503 and a reference point 504 are displayed on the radiation image 502. The reference point 504 is the center of the region of interest 503 displayed in the image display region 501. Here, when the image is displayed for the first time, the region of interest 503 having a preset size, for example, is set by the region of interest setting means 104. Note that the size and arrangement of the region of interest 503 can be arbitrarily changed.

  On the other hand, various operation menus are displayed in the operation menu display area 401. In the example shown in FIG. 2, the operation menu display area 401 includes a right rotation button 402, a left rotation button 403, a left / right inversion button 404, an up / down inversion button 405, a translation button 406, and a region of interest setting button 407. Further, the buttons displayed in the operation menu display area 401 are not limited to those described above. For example, an enlarge button or a reduce button may be displayed.

  When the right rotation button 402 is designated by the instruction means 107, for example, if the instruction means 107 is a mouse, when the cursor corresponding to the movement of the mouse is placed on the right rotation button 402 and clicked, the radiation image 502 is the reference. Rotate clockwise around point 504. Specifically, the image processing unit 105-1 performs image processing on the radiation image 502 so that the radiation image 502 rotates to the right around the reference point 504, and causes the display unit 106 to display the image. For example, the rotation angle is 90 degrees, but is not limited to this, and may be an angle other than 90 degrees. The description of the left rotation button 403 is omitted because it differs from the right rotation button 402 only in that the rotation direction is not the right but the left direction.

  Further, when the left / right reverse button 404 is designated by the instruction unit 107, for example, when clicked, the radiographic image 502 is reversed left and right with a straight line passing through the reference point 504 as an axis. Specifically, the image processing unit 105-1 performs image processing on the radiation image 502 so that the radiation image 502 is horizontally reversed about the straight line passing through the reference point 504 as an axis, and causes the display unit 106 to display the image. The up / down button 405 is different from the left / right reversal button 404 in that the reversal direction is not left / right but only in the up / down direction.

  Further, when the translation button 406 is designated by the instruction unit 107, for example, when it is clicked, the radiation image 502 is parallel on the image display area 501 in accordance with an instruction sent from the instruction unit 107 after the designation of the translation button 406. Moving. Specifically, the image processing unit 105-1 performs image processing on the radiation image 502 so that the radiation image 502 moves in response to an instruction sent from the instruction unit 107, and causes the display unit 106 to display the image. For example, when the instruction unit 107 is a mouse, the radiation image 502 is moved by performing a drag operation on the image display area 501. Further, when the translation button 406 is designated, a cross key or the like may be displayed, and the radiation image 502 may be moved using the displayed key.

  When the region of interest setting button 407 is designated by the instruction unit 107, for example, when clicked, the region of interest is set in the radiation image 502 in accordance with an instruction sent from the instruction unit 107 after the region of interest setting button 407 is designated. . Specifically, the image processing unit 105-1 performs image processing so as to set a region of interest for the radiation image 502 in accordance with an instruction sent from the instruction unit 107, and causes the display unit 106 to display the image. For example, when the instruction unit 107 is a mouse, a region of interest is set on the radiation image 502 by performing a drag operation on the image display region 501. After the region of interest setting button 407 is clicked, the image processing unit 105-1 displays a plurality of regions of interest setting methods on the display unit 106, and the operator uses the instruction unit 107 to select a plurality of regions of interest setting methods. One setting method may be selected. The method of setting a plurality of regions of interest includes, for example, a method of setting the above-described X-ray irradiation field region as a region of interest, a method of setting a region of interest according to the type of image acquired by the X-ray imaging apparatus 100, and a radiographic image. And a method of setting a predetermined region as a region of interest. Note that when the region of interest setting button 407 is clicked, the region of interest 503 may be set on the radiation image 502.

  Hereinafter, an example of the operation of the image processing apparatus 101 configured as described above will be described with reference to FIGS.

  FIG. 3 is a flowchart for explaining the operation of displaying the radiation image 502 on the display means 106. First, in FIG. 3, the image acquisition unit 102 acquires a radiation image 502 from the X-ray imaging apparatus 100. (Step S201) Then, image processing such as gradation processing is performed by the display control means 105 (Step S202), and the display control means 105 displays the radiation image 502 on the display means 106 such as a monitor (Step S203). Step S201 may acquire the radiation image 502 immediately after the X-ray imaging apparatus 100 acquires the radiation image 502, or acquire the radiation image 502 acquired in advance by the X-ray imaging apparatus 100. It does not matter.

  Next, FIG. 4 is a flowchart for explaining the operation of setting a region of interest in the radiation image 502 displayed on the display means 106. In FIG. 4, the region-of-interest setting unit 104 receives an instruction from the instruction unit 107 (step S301), and sets the region of interest on the image. Here, the region of interest is set, for example, by clicking on the region-of-interest setting button 407 shown in FIG. 2 by the instruction means 107 and dragging on the radiation image 502 to set the desired region as the region of interest.

  Then, it is confirmed whether or not the set region of interest is acceptable (step S302). Here, for this confirmation, for example, a message indicating whether or not the set region of interest is acceptable is displayed, and the instruction unit 107 selects whether or not the set region of interest is acceptable.

  When the region of interest setting is completed, the reference point determination unit 103 acquires the center of the region of interest in the image display region (step S303), and determines this center coordinate as the reference point (step S304). The process ends when the reference point is determined and when it is determined that the region of interest set in step S302 is not good.

  Next, FIG. 5 is a flowchart for explaining the operation when the instruction unit 107 receives an instruction to perform image processing such as rotation and reversal on the radiation image 502. In FIG. 5, the image processing means 105-1 in the display control means 105 receives an instruction from the instruction unit 107 such as a mouse (step S401), and determines whether or not the type of image processing is rotation or inversion ( Step S402). For example, when the right rotation button 402 shown in FIG. 2 is clicked by the instruction unit 107, the image processing unit 105-1 determines that the instruction is to rotate the radiation image 502 to the right. When the translation button 406 is clicked by the instruction unit 107, the image processing unit 105-1 determines that the instruction is to translate the radiation image 502.

  If it is determined in step S402 that the type of image processing is not rotation or inversion, for example, the image processing unit 105-1 performs image processing for moving an image in accordance with an instruction from the instruction unit 107 (step S403). The display is updated (step S404). Thereafter, the reference point determination unit 103 acquires the center coordinates in the region of interest 503 displayed in the image display region 501 (step S405), and newly determines the reference point 504 (step S406). That is, the reference point 504 is updated in step S406.

  If the determination result in step S402 is a rotation / reversal operation, the image processing unit 105-1 acquires the reference point position determined by the reference point determination unit 103 (step S407), and the acquired reference point is the center. The selected image processing is performed (step S408). In step S409, the image processing unit 105-1 updates the image display.

  Next, the case where the radiographic image 502 is horizontally reversed will be described with reference to FIG. In FIG. 6, a region of interest 503 is set in advance for the radiation image 502, and is enlarged to the extent that the entire radiation image 502 does not fit within the image display region 501. The reference point position 504 is the center of the region of interest 503 displayed in the image display region 501.

  In addition, since the same code | symbol as already described in the figure has shown the same or substantially the same part, the description is abbreviate | omitted.

  When receiving an instruction to invert the radiographic image 502 from the instruction unit 107, the image processing unit 105-1 inverts the radiographic image 502 about the straight line passing through the reference point 504. Therefore, as shown in FIG. 6, “4” of the region of interest 503 is mainly displayed in the image display region 501 before and after the horizontal reversal. As described above, the image displayed in the image display area 501 before the horizontal reversal is displayed in the image display area 501 even after the horizontal reversal.

  FIG. 7 shows another example when the radiation image 502 is horizontally reversed. In FIG. 7, a region of interest 503 is set in advance for the radiographic image 502, and is enlarged to such an extent that the entire radiographic image 502 does not fit within the image display region 501. The reference point position 504 is the center of the region of interest 503 displayed in the image display region 501.

  In the example shown in FIG. 7 as well, the image displayed in the image display area 501 before the horizontal reversal is displayed in the image display area 501 even after the horizontal reversal. FIG. 8 is a diagram in the case of using the conventional technique with respect to FIG. As shown in FIG. 8, it can be seen that a part of the region of interest 503 displayed in the image display area 501 before the inversion is removed from the image display area 501 after the inversion.

  Next, a case where the radiation image 502 is rotated to the right will be described with reference to FIG. In FIG. 9, a region of interest 503 is set in advance for the radiographic image 502, and is enlarged to the extent that the entire radiographic image 502 does not fit within the image display region 501. The reference point position 504 is the center of the region of interest 503 displayed in the image display region 501.

  The image processing means 105-1 rotates the radiation image 502 clockwise around the reference point 504. In this embodiment, it is rotated 90 degrees to the right. Therefore, as shown in FIG. 9, “4” of the region of interest 503 is mainly displayed in the image display region 501 before and after the clockwise rotation. As described above, the image displayed in the image display area 501 before the horizontal reversal is displayed in the image display area 501 even after the right rotation.

  FIG. 10 shows an example when the radiation image 502 is rotated to the left. In FIG. 10, a region of interest 503 is set in advance for the radiographic image 502, and is enlarged to the extent that the entire radiographic image 502 does not fit within the image display region 501. Further, the region of interest 503 is shifted to the right end of the image display region 501. The reference point position 504 is the center of the region of interest 503 displayed in the image display region 501.

  As shown in FIG. 10, a part of the region of interest 503 displayed in the image display area 501 before the rotation has deviated from the image display area 501 after the rotation. However, most of the region of interest 503 displayed in the image display area 501 before the rotation is displayed in the image display area 501 before and after the rotation. FIG. 11 is a diagram in the case of using the conventional technique with respect to FIG. As shown in FIG. 11, it can be seen that the region of interest 503 displayed in the image display area 501 before the rotation has deviated from the image display area 501 after the rotation.

  Next, in this embodiment, the reason why a new reference point 504 is not obtained when the instruction unit 107 instructs to invert and rotate the radiation image 502 will be described.

  FIG. 12 is a diagram in the case where the reference point 504 is obtained even when the radiation image 502 is inverted. As shown in FIG. 12, when the left / right reversing operation is repeated twice, the operator normally expects to return to the display state before performing the left / right reversing operation. However, if the reference point 504 is obtained in the region of interest 503 displayed in the image display area 501 after the first horizontal reversal, the state before the horizontal reversal is the same after the second horizontal reversal. Must not. Here, if there is an instruction from the instructing unit 107 to invert and rotate the radiation image 502 as in the present case, this problem can be solved if a new reference point 504 is not obtained.

  FIG. 13 is a diagram when the reference point is not obtained when the radiation image 502 is inverted. As shown in FIG. 13, since the reference point 504 is not obtained in the region of interest 503 after the first horizontal reversal, the state before the horizontal reversal is the same after the second horizontal reversal. Therefore, the operator can reverse the radiation image 502 without feeling uncomfortable.

  Next, FIG. 14 is a diagram in the case where the reference point 504 is obtained even when the radiation image 502 is rotated. As shown in FIG. 14, when the right reverse and the left rotation are repeated, the operator expects to return to the display state before the normal rotation. However, if the reference point 504 is obtained in the region of interest 503 displayed in the image display area 501 after the right rotation, the state before the rotation is not the same after the left rotation. Here, if there is an instruction from the instruction unit 107 to invert and rotate the radiation image 502 as in the present case, this problem can be solved if a new reference point is not obtained.

  FIG. 15 is a diagram in a case where the reference point 504 is not obtained when the radiation image 502 is rotated. As shown in FIG. 15, since the reference point 504 is not obtained in the region of interest 503 after the right rotation, the state after the left rotation is the same as the state before the rotation. Therefore, the operator can rotate the radiation image 502 without feeling uncomfortable.

  As described above, according to the present embodiment, it is possible to prevent the region of interest displayed in the image display area from deviating from the image display area even when the image is rotated or inverted.

  Furthermore, according to the present embodiment, it is possible to prevent the region of interest displayed in the image display region from moving out of the image display region even when the image is rotated or reversed, thereby reducing the movement of the operator's gaze point. can do.

  In addition, when the image is a radiographic image, the image area to be diagnosed is not displayed in the image display area by the rotation or inversion operation in the conventional technique, resulting in a decrease in the work efficiency of the operator. According to the present embodiment, it is possible to prevent a reduction in the efficiency of diagnosis work.

  Furthermore, according to the present embodiment, when rotation or reversal processing is performed on an image, a new reference point is not determined, and therefore when left-right reversal is repeated or right rotation and left rotation are repeated. It is possible to return to the state before reversal or rotation, so that the operator does not feel uncomfortable.

  The disclosed technology is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present embodiment.

  For example, in the present embodiment, the reference point is not newly determined when the image is rotated and when the image is inverted, but the present invention is not limited to this. For example, even when the image is rotated to the right, the reference point setting unit 103 newly obtains a reference point. Then, when the left rotation is instructed by the instruction means 107, the rotation is performed around the reference point determined before the right rotation, and when a process other than the left rotation is instructed, the newly determined reference Inversion or the like may be performed based on the points. Also in the case of the left rotation, as in the case of the right rotation, when a new reference point is obtained and the right rotation is instructed by the instruction unit 107, the rotation is performed around the reference point determined before the left rotation, When processing other than rotation is instructed, inversion or the like may be performed based on a newly determined reference point.

  In addition, when the image is reversed left and right, a new reference point is obtained by the reference point setting unit 103, and when the instruction unit 107 instructs the left-right reversal, the reference point determined before the first left-right reversal It is also possible to perform inversion based on a newly obtained reference point when processing other than left / right inversion is instructed. The same applies to the case of upside down. That is, the newly determined reference point and the previously obtained reference point may be selectively used according to the instructed process. More specifically, the newly determined reference point and the previously obtained reference point may be selectively used based on the comparison result between the newly designated process and the previously designated process.

[Others]
This case can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

DESCRIPTION OF SYMBOLS 100 X-ray imaging apparatus 101 Image processing apparatus 102 Image acquisition means 103 Reference point determination means 104 Area of interest setting means 105 Display control means 105-1 Image processing means 106 Display means 107 Operation means 501 Image display area 502 Image 503 Area of interest 504 Reference point

Claims (11)

A region of interest setting means for setting a region of interest on the image;
When the region of interest is set, processing for determining the center of the region displayed on the display means for displaying at least a part of the image of the region of interest as a reference point, and translating the image When the process is performed on the image, the position of the reference point is changed according to the amount of translation of the image, and the process of enlarging or reducing the image is performed on the image. Determining means for newly determining the reference point and maintaining the previously determined reference point when processing to invert and rotate the image is performed on the image;
A process of inverting the image based on the reference point, a process of rotating the image based on the reference point, a process of translating the image, and a process of enlarging or reducing the image according to an instruction from the user Image processing means for selectively performing the processing on the image.   The image processing apparatus according to claim 1, wherein the image processing unit performs a process of rotating the image around the reference point, and performs a process of inverting the image about a straight line passing through the reference point. .   The image processing apparatus according to claim 1, wherein the region-of-interest setting unit sets a region designated by an operator as the region of interest. The image is a radiographic image;
The image processing apparatus according to claim 1, wherein the region-of-interest setting unit sets an irradiation field region as the region of interest. Image acquisition means for acquiring an image captured by the radiation imaging apparatus;
The image processing apparatus according to any one of 4 from claim 1, further comprising a display control means for displaying an image by the image acquisition unit has acquired the display means. The determination unit is a case where at least a part of the image is not displayed on the display unit, and when the process of translating the image is performed on the image, the position of the reference point Is changed according to the amount of translation of the image, and when the process of inverting and rotating the image is performed on the image, the previously determined reference point is maintained. the image processing apparatus according to any one of claims 1-5, wherein. An image processing apparatus comprising: an image acquisition unit that acquires a radiographic image captured by a radiographic apparatus; and a region of interest setting unit that sets a region of interest for the radiographic image,
Display control means capable of displaying in a state where a part of the radiation image acquired by the image acquisition means is not displayed on the display means;
Determining means for determining the criteria points from the ROI when the predetermined image processing is performed on the radiographic image image,
In accordance with an instruction from a user, a process for inverting the radiographic image based on the reference point, a process for enlarging or reducing the radiographic image based on the reference point, and a process for rotating the radiographic image based on the reference point And image processing means for performing a process of translating the radiographic image on the radiographic image,
When the process of translating the radiographic image is performed on the radiographic image, the determining unit changes the position of the reference point according to the amount of translating the radiographic image, and When the process of enlarging or reducing is performed on the radiographic image, the reference point is newly determined , and the radiographic image is inverted while a part of the radiographic image is not displayed on the display unit. An image processing apparatus that maintains a previously determined reference point when the process of rotating and the process of rotating are performed on the radiographic image. A region of interest setting step for setting a region of interest on the image;
When the region of interest is set, processing for determining the center of the region displayed on the display means for displaying at least a part of the image of the region of interest as a reference point, and translating the image When the process is performed on the image, the position of the reference point is changed according to the amount of translation of the image, and the process of enlarging or reducing the image is performed on the image. A setting step of maintaining a previously determined reference point when the process of inverting the image and rotating the image is performed on the image when the reference point is newly determined.
In response to an instruction from a user, a process for inverting the image based on the reference point, a process for rotating the image based on the reference point, and a process for translating the image are selectively performed on the image. An image processing method comprising: an image processing step to be performed. The program which makes a computer perform the method of Claim 8 . A region of interest setting means for setting a region of interest on the image;
When the region of interest is set, the center of the region displayed on the display means for displaying at least a part of the image of the region of interest is determined as a reference point, and the image is enlarged or reduced. A determination means for newly determining the reference point when processing is performed on the image;
An image processing apparatus comprising: an image processing unit that performs a process of enlarging or reducing the image according to an instruction from a user. An image processing apparatus comprising: an image acquisition unit that acquires a radiographic image captured by a radiographic apparatus; and a region of interest setting unit that sets a region of interest for the radiographic image,
Display control means capable of displaying in a state where a part of the radiation image acquired by the image acquisition means is not displayed on the display means;
Determining means for determining a reference point from within the region of interest when predetermined image processing is performed on the radiation image;
Image processing means for performing processing for enlarging or reducing the radiographic image based on the reference point on the radiographic image in response to an instruction from a user,
The determination unit is configured to newly determine the reference point when a process for enlarging or reducing the radiographic image is performed on the radiographic image.

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