CN111553903B - Adaptive measurement method and device for focus area image - Google Patents
Adaptive measurement method and device for focus area image Download PDFInfo
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- 230000003044 adaptive effect Effects 0.000 title claims description 8
- 238000000691 measurement method Methods 0.000 title abstract description 5
- 238000000034 method Methods 0.000 claims description 40
- 238000005259 measurement Methods 0.000 claims description 13
- 230000003902 lesion Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 206010028980 Neoplasm Diseases 0.000 description 2
- 206010056342 Pulmonary mass Diseases 0.000 description 2
- 238000002059 diagnostic imaging Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 208000009453 Thyroid Nodule Diseases 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
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- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
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- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20092—Interactive image processing based on input by user
- G06T2207/20104—Interactive definition of region of interest [ROI]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30061—Lung
- G06T2207/30064—Lung nodule
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30096—Tumor; Lesion
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Abstract
The invention discloses a self-adaptive measurement method and a device for focus area images, and specifically comprises the following contents: acquiring and displaying a nodule focus area image; determining an endpoint A, B of the long diameter according to the user click position; determining a midpoint position C thereof from the end points A, B; determining a short diameter perpendicular to the long diameter according to the midpoint position C, and determining two end points E, F of the short diameter; adjusting any one of the endpoints A, B, E, F according to user input, and always keeping the short diameter perpendicular to the long diameter; the average value of the length, the long diameter, and the short diameter of each of the square frame, the long diameter, and the short diameter defined by A, B, E, F is determined in real time and displayed. According to the invention, the measuring tool can be generated by one key, and the image size of the focus area can be flexibly measured.
Description
Technical Field
The invention relates to the field of medical imaging, in particular to a self-adaptive measurement method and device for focus area images.
Background
At present, nodules have attracted considerable attention, such as lung nodules, thyroid nodules, and the like, and doctors typically observe the condition of patient nodules by means of medical imaging. As time increases, the patient's nodules may change, e.g., increase, decrease, or grow new nodules, etc. The disease condition of the patient can be judged according to the size of the nodule so as to formulate a reasonable treatment method. In the prior art, according to the focus measurement standard of imaging, two radial lines of the largest layer of focus are measured: a maximum length and a maximum length perpendicular thereto. At present, the doctor is mainly used for judging the size of the nodule according to the medical image of the patient, which requires a lot of time, and has low efficiency and high subjectivity. The prior art document CN108717700a provides a method for detecting the length of the major diameter of a node, which mainly adopts a node segmentation model to obtain a node region from a three-dimensional coordinate image region of interest, and measures the node region by covariance matrix decomposition or ellipsoid fitting to determine the length of the major diameter and the length of the minor diameter of the node. Compared with the manual marking method, the method is efficient, but needs to perform matrix transformation and space transformation on the pixel set of the node area, has large data processing capacity, can only determine the final long-diameter length and the final short-diameter length, and is easy to cause low accuracy of measurement results due to complex transformation of data.
On lung nodule measurements, the fleischene association recommends: the nodules smaller than 10mm adopt the average value of the long and short diameters (which can more accurately reflect the 3D volume of the tumor), and the nodules or clusters larger than 10mm should be recorded as long and short diameters, because long diameters can be used to determine the T factor in lung cancer classification and reflect the index of the tumor treatment effect. However, no method is provided to give the average value of the major and minor diameters and no method is provided to give the major and minor diameters of the nodule area simply, accurately and rapidly.
Disclosure of Invention
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a solution to overcome or at least partially solve the above problems. Accordingly, in one aspect of the present invention, there is provided an adaptive metrology method for lesion area images, the method comprising: acquiring and displaying a nodule focus area image; determining an endpoint A, B of the long diameter according to the user click position; determining a midpoint position C thereof from the end points A, B; determining a short diameter perpendicular to the long diameter according to the midpoint position C, and determining two end points E, F of the short diameter; adjusting any one of the endpoints A, B, E, F according to user input, and always keeping the short diameter perpendicular to the long diameter; the average value of the length, the long diameter, and the short diameter of each of the square frame, the long diameter, and the short diameter defined by A, B, E, F is determined in real time and displayed.
Optionally, if the adjustment end point E is E', the method specifically comprises the steps of determining the projection Ep of E on the long diameter; determining the projection E 'p of the adjusted E' on the straight line AB; calculating the difference value of Ep and E' p in the two-dimensional coordinate direction; subtracting the difference value from the coordinates of the F ' point to obtain the coordinates of the F ' point and positioning the F ' point; connecting F 'and E' creates a short diameter E 'F', which is parallel to short diameter EF.
Optionally, determining a square box defined by A, B, E, F specifically includes: determining the projection Ep of E on the long diameter AB; and respectively calculating the difference value of Ep and the point A and the difference value of Ep and the point B, respectively subtracting and adding the 2 difference values from the two-dimensional coordinate value of E, F, and determining 4 vertexes of the square frame.
Optionally, when adjusting the point B to B', the method includes the steps of: based on user input, calculating a rotation angle a of the straight lines BA and B 'A, and rotating the EA around the A by the rotation angle a to obtain E'; acquiring a short diameter E 'F' perpendicular to the long diameter B 'A through the E', wherein the length of the E 'F' is the same as the length of EF; adjusting any one of the endpoints E 'and F' according to user input, and keeping the short diameter always perpendicular to the long diameter; the average value of the length, the long diameter and the short diameter of each of the square frame, the long diameter and the short diameter defined by A, B ', E ', F ' is determined in real time and displayed.
Optionally, when the end point E ' is adjusted to E ', the method specifically comprises the steps of determining a projection E ' p of E ' on the long diameter B ' A; determining the projection E ' p of the adjusted E ' on the straight line B ' A; calculating the difference value of E 'p and E' p in the two-dimensional coordinate direction; subtracting the difference from the coordinates of the F ' point to obtain the coordinates of the F ' and locating the F ' point; connecting F 'with E', generating a new short diameter E 'F', the minor axis E "F" is parallel to the minor axis E 'F'.
The invention also provides a self-adaptive measurement device for the focus area image, which comprises an image area acquisition module, a focus area analysis module and a focus area analysis module, wherein the image area acquisition module is used for acquiring and displaying the focus area image of the nodule; the long-diameter end point determining module is used for determining an end point A, B of the long diameter according to the clicking position of the user; the short diameter determining module is used for determining a midpoint position C according to the end points A, B and determining a short diameter perpendicular to the long diameter according to the midpoint position C, and the short diameter is provided with two end points E, F;
the long and short diameter adjusting module is used for adjusting any one of the endpoints A, B, E, F according to user input and always keeping the short diameter and the long diameter vertical; and the measurement module is used for determining and displaying the average value of the length, the long diameter and the short diameter of the square frame, the long diameter and the short diameter defined by A, B, E, F in real time.
Optionally, when the end point E is adjusted to be E', the long and short diameter adjusting module executes the following process of determining the projection Ep of E on the long diameter; determining the projection E 'p of the adjusted E' on the straight line AB; calculating the difference value of Ep and E' p in the two-dimensional coordinate direction; subtracting the difference value from the coordinates of the F ' point to obtain the coordinates of the F ' point and positioning the F ' point; connecting F 'and E' creates a short diameter E 'F', which is parallel to short diameter EF.
Optionally, the measurement module performs the following procedure: determining the projection Ep of E on the long diameter AB; and respectively calculating the difference value of Ep and the point A and the difference value of Ep and the point B, respectively subtracting and adding the 2 difference values from the two-dimensional coordinate value of E, F, and determining 4 vertexes of the square frame.
Optionally, when the point B is adjusted to the point B ', the long and short diameter adjustment module performs the following process of calculating a rotation angle a of the straight line BA and the point B ' A based on user input, and rotating the EA around the point A by the rotation angle a to obtain E '; acquiring a short diameter E 'F' perpendicular to the long diameter B 'A through the E', wherein the length of the E 'F' is the same as the length of EF; and adjusting any one of the endpoints E ', F' according to the input of the user, and keeping the short diameter always perpendicular to the long diameter.
Optionally, when the end point E ' is adjusted to E ', the long and short diameter adjustment module performs the process of determining a projection E ' p of E ' on the long diameter B ' A; determining the projection E ' p of the adjusted E ' on the straight line B ' A; calculating the difference value of E 'p and E' p in the two-dimensional coordinate direction; subtracting the difference from the coordinates of the F ' point to obtain the coordinates of the F ' and locating the F ' point; connecting F 'with E', generating a new short diameter E 'F', the minor axis E "F" is parallel to the minor axis E 'F'.
The technical scheme provided in the embodiment of the application has at least the following technical effects or advantages: the invention can automatically and always keep the long diameter vertical, can display an external minimum rectangular frame in real time, can display the average value of the long diameter, the short diameter length and the long diameter, and is convenient for acquiring the sizes of various angles of the focus region image.
The foregoing description is only an overview of the technical solutions of the present invention, and may be implemented according to the content of the specification in order to make the technical means of the present invention more clearly understood, and in order to make the technical solutions of the present invention and the objects, features and advantages thereof more clearly understood, the following specific embodiments of the present invention will be specifically described.
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Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 illustrates a flow chart of an adaptive metrology method for lesion area images in accordance with the present invention;
FIG. 2 illustrates an initial cross-measurement tool interface diagram generated using the method provided by the present invention;
FIG. 3 illustrates a cross measurement tool interface diagram after adjustment of the minor diameter;
FIG. 4 illustrates a cross measurement tool interface diagram generated after an adjustment of the major diameter;
fig. 5 shows a cross-shaped measuring tool interface diagram after further adjustment of the minor diameter after adjustment of the major diameter.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention aims to provide a self-adaptive measurement method for a focus area image, which can measure the focus area image, especially the focus area image with irregular outline, can provide long diameter and short diameter which are always vertical, and can display a square frame which is limited by the long diameter and the short diameter and surrounds the focus area image in real time. As shown in fig. 1, the method specifically includes: s1, acquiring and displaying a nodule focus area image; s2, determining an endpoint A, B of the long diameter according to the clicking position of the user; s3, determining a short diameter perpendicular to the long diameter according to the end points A, B, and determining two end points E, F of the short diameter; s4, any one of the endpoints A, B, E, F is adjusted according to user input, and the short diameter and the long diameter are always kept perpendicular; s5, determining and displaying the average value of the length, the long diameter and the short diameter of the square frame, the long diameter and the short diameter defined by A, B, E, F in real time.
By the method provided by the invention, the long diameter and the short diameter are created in real time when the left button of the mouse is pressed and dragged. The initial long diameter is determined by the position where the user presses the left button of the mouse and the position where the user drags, the short diameter is automatically generated and is perpendicular to the long diameter, the long diameter is equally divided, and the initial length of the long diameter is equal to the long diameter, so that a cross measuring tool can be created through one-button operation of the user, as shown in fig. 2.
After the cross measuring tool is built, the end points of the long diameter and the short diameter can be adjusted at any time. The positions of the 2 end points of the short diameter can be independently adjusted without changing the long diameter, the short diameter is always vertical to the long diameter, the lengths of the short diameter and the long diameter and the circumscribed rectangular frame (box) defined by the long diameter and the short diameter can be displayed in real time in the adjustment process, the end points of the short diameter are adjusted on an initially created cross measuring tool, and the adjusted cross measuring tool is shown in fig. 3.
If the end point E is adjusted to be E', the method specifically comprises the following steps of determining the projection Ep of E on the long diameter; determining the projection E 'p of the adjusted E' on the straight line AB; calculating the difference value of Ep and E' p in the two-dimensional coordinate direction; subtracting the difference value from the coordinates of the F ' point to obtain the coordinates of the F ' point and positioning the F ' point; connecting F 'and E' creates a short diameter E 'F', which is parallel to short diameter EF.
Determining a square box defined by A, B, E, F, specifically comprising: determining the projection Ep of E on the long diameter AB; and respectively calculating the difference value of Ep and the point A and the difference value of Ep and the point B, respectively subtracting and adding the 2 difference values from the two-dimensional coordinate value of E, F, and determining 4 vertexes of the square frame.
The 2 end points of the long diameter can be respectively adjusted and placed at any position, when the long diameter is adjusted, the short diameter is automatically adjusted along with the adjustment of the long diameter, and the short diameter is always vertical to the long diameter. In the adjusting process, the lengths of the long diameter and the short diameter and the external rectangular frame are displayed in real time. Fig. 4 shows the cross measuring tool after the length adjustment.
In adjusting point B to B', the method comprises the steps of: based on user input, calculating a rotation angle a of the straight lines BA and B 'A, and rotating the EA around the A by the rotation angle a to obtain E'; acquiring a short diameter E 'F' perpendicular to the long diameter B 'A through the E', wherein the length of the E 'F' is the same as the length of EF; adjusting any one of the endpoints E 'and F' according to user input, and keeping the short diameter always perpendicular to the long diameter; the average value of the length, the long diameter and the short diameter of each of the square frame, the long diameter and the short diameter defined by A, B ', E ', F ' is determined in real time and displayed.
After the adjustment of the long diameter, if the short diameter is adjusted, as a specific embodiment, when the end point E ' is adjusted to E ', the method specifically comprises the following steps of determining the projection E ' p of E ' on the long diameter B ' A; determining the projection E ' p of the adjusted E ' on the straight line B ' A; calculating the difference value of E 'p and E' p in the two-dimensional coordinate direction; subtracting the difference from the coordinates of the F ' point to obtain the coordinates of the F ' and locating the F ' point; connecting F 'with E', generating a new short diameter E 'F', the minor axis E "F" is parallel to the minor axis E 'F'. Fig. 5 shows a case where the short diameter end point is adjusted after the long diameter end point is adjusted.
The invention also provides a self-adaptive measurement device for the focus area image, which comprises an image area acquisition module, a focus area analysis module and a focus area analysis module, wherein the image area acquisition module is used for acquiring and displaying the focus area image of the nodule; the long-diameter end point determining module is used for determining an end point A, B of the long diameter according to the clicking position of the user; the short diameter determining module is used for determining a midpoint position C according to the end points A, B and determining a short diameter perpendicular to the long diameter according to the midpoint position C, and the short diameter is provided with two end points E, F;
the long and short diameter adjusting module is used for adjusting any one of the endpoints A, B, E, F according to user input and always keeping the short diameter and the long diameter vertical; and the measurement module is used for determining and displaying the average value of the length, the long diameter and the short diameter of the square frame, the long diameter and the short diameter defined by A, B, E, F in real time.
As a specific implementation mode, when the end point E is adjusted to be E', the long and short diameter adjusting module executes the following process of determining the projection Ep of E on the long diameter; determining the projection E 'p of the adjusted E' on the straight line AB; calculating the difference value of Ep and E' p in the two-dimensional coordinate direction; subtracting the difference value from the coordinates of the F ' point to obtain the coordinates of the F ' point and positioning the F ' point; connecting F 'and E' creates a short diameter E 'F', which is parallel to short diameter EF.
When determining the circumscribed rectangle frames with long diameter and short diameter, the measurement module executes the following processes: determining the projection Ep of E on the long diameter AB;
and respectively calculating the difference value of Ep and the point A and the difference value of Ep and the point B, respectively subtracting and adding the 2 difference values from the two-dimensional coordinate value of E, F, and determining 4 vertexes of the square frame.
In the process of adjusting the long diameter, as a specific implementation mode, when the point B is adjusted to the point B ', the long diameter and short diameter adjusting module performs the following process of calculating the rotation angle a of the straight line BA and the rotation angle a of the straight line B ' A based on user input, and rotating the EA around the rotation angle a of the straight line A to acquire E ';
acquiring a short diameter E 'F' perpendicular to the long diameter B 'A through the E', wherein the length of the E 'F' is the same as the length of EF; and adjusting any one of the endpoints E ', F' according to the input of the user, and keeping the short diameter always perpendicular to the long diameter.
When the short diameter needs to be continuously adjusted after the long diameter is adjusted, as a specific implementation manner, when the end point E ' is adjusted to E ', the long diameter adjusting module executes the following process of determining the projection E ' p of E ' on the long diameter B ' A; determining the projection E ' p of the adjusted E ' on the straight line B ' A; calculating the difference value of E 'p and E' p in the two-dimensional coordinate direction; subtracting the difference from the coordinates of the F ' point to obtain the coordinates of the F ' and locating the F ' point; connecting F 'with E', generating a new short diameter E 'F', the minor axis E "F" is parallel to the minor axis E 'F'.
The technical scheme provided in the embodiment of the application has at least the following technical effects or advantages: the invention can automatically and always keep the long diameter vertical, can display an external minimum rectangular frame in real time, can display the average value of the long diameter, the short diameter length and the long diameter, and is convenient for acquiring the sizes of various angles of the focus region image.
In the description provided herein, certain specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Claims (6)
1. A method for adaptive metrology of images of a lesion area, the method comprising:
acquiring and displaying a nodule focus area image;
determining an endpoint A, B of the long diameter according to the user click position;
determining a short diameter perpendicular to the long diameter according to the end points A, B, and determining two end points E, F of the short diameter;
according to any one of the user input adjustment endpoints A, B, E, F, the short diameter is always kept perpendicular to the long diameter, and the lengths of the short diameter and the long diameter and the circumscribed rectangular frame limited by the long diameter and the short diameter are displayed in real time in the adjustment process,
adjusting the endpoint E to E' comprises the steps of:
determining the projection Ep of E on the long diameter;
determining the projection E 'p of the adjusted E' on the straight line AB;
calculating the difference value of Ep and E' p in the two-dimensional coordinate direction;
subtracting the difference value from the coordinates of the F ' point to obtain the coordinates of the F ' point and positioning the F ' point;
connecting F 'and E', and generating a short diameter E 'F', wherein the short diameter E 'F' is parallel to the short diameter EF;
adjusting endpoint B to B' comprises the steps of:
based on user input, calculating a rotation angle a of the straight lines BA and B 'A, and rotating the EA around the A by the rotation angle a to obtain E';
acquiring a short diameter E 'F' perpendicular to a long diameter B 'A through the E', wherein the length of the E 'F' is the same as the length of EF;
adjusting any one of the endpoints E 'and F' according to user input, and keeping the short diameter always perpendicular to the long diameter;
the average value of the length, the long diameter, and the short diameter of each of the rectangular frame, the long diameter, and the short diameter defined by the adjusted A, B, E, F is determined and displayed.
2. The method of claim 1, wherein determining in real time a rectangular box defined by A, B, E, F, in particular comprises:
determining the projection Ep of E on the long diameter AB;
and respectively calculating the difference value of Ep and the point A and the difference value of Ep and the point B, respectively subtracting and adding the 2 difference values from the two-dimensional coordinate value of E, F, and determining 4 vertexes of the rectangular frame.
3. The method according to claim 1, characterized in that, when the end point E' is adjusted to E ", it comprises the following steps:
determining a projection E ' p of E ' on the long diameter B ' A;
determining a projection E ' ' p of the adjusted E ' ' on a straight line B ' A;
calculating the difference value of E ' p and E ' ' p in the two-dimensional coordinate direction;
subtracting the difference from the coordinates of the F ' point to obtain the coordinates of the F ' ' and locating the F ' ' point;
connecting F '' with E '', a new short diameter E '' F '' is generated, said short diameter E '' F '' being parallel to the short diameter E 'F'.
4. An adaptive metrology device for lesion field images, the device comprising:
the image area acquisition module is used for acquiring and displaying the image of the nodule focus area;
the long-diameter end point determining module is used for determining an end point A, B of the long diameter according to the clicking position of the user;
the short diameter determining module is used for determining a short diameter perpendicular to the long diameter according to the long diameter end point A, B, and the short diameter is provided with two end points E, F;
the long and short diameter adjusting module is used for adjusting any one of the endpoints A, B, E, F according to user input, always keeping the short diameter perpendicular to the long diameter, and displaying the lengths of the short diameter and the long diameter and the circumscribed rectangular frame limited by the long diameter and the short diameter in real time in the adjusting process;
wherein, the adjusting endpoint E is E', the following steps are executed:
determining the projection Ep of E on the long diameter;
determining the projection E 'p of the adjusted E' on the straight line AB;
calculating the difference value of Ep and E' p in the two-dimensional coordinate direction;
subtracting the difference value from the coordinates of the F ' point to obtain the coordinates of the F ' point and positioning the F ' point;
connecting F 'and E', and generating a short diameter E 'F', wherein the short diameter E 'F' is parallel to the short diameter EF;
adjusting endpoint B to B', performing the steps of:
based on user input, calculating a rotation angle a of the straight lines BA and B 'A, and rotating the EA around the A by the rotation angle a to obtain E';
acquiring a short diameter E 'F' perpendicular to a long diameter B 'A through the E', wherein the length of the E 'F' is the same as the length of EF;
adjusting any one of the endpoints E 'and F' according to user input, and keeping the short diameter always perpendicular to the long diameter;
and the measurement module is used for determining and displaying the average value of the length, the long diameter and the short diameter of each rectangular frame, the long diameter and the short diameter which are defined by the adjusted A, B, E, F.
5. The adaptive metrology device of claim 4, wherein the metrology module performs the following process:
determining the projection Ep of E on the long diameter AB;
and respectively calculating the difference value of Ep and the point A and the difference value of Ep and the point B, respectively subtracting and adding the 2 difference values from the two-dimensional coordinate value of E, F, and determining 4 vertexes of the rectangular frame.
6. The adaptive metrology apparatus of claim 4, wherein the long and short path adjustment module performs the following process when adjusting the endpoint E' to e″.
Determining a projection E ' p of E ' on the long diameter B ' A;
determining a projection E ' ' p of the adjusted E ' ' on a straight line B ' A;
calculating the difference value of E ' p and E ' ' p in the two-dimensional coordinate direction;
subtracting the difference from the coordinates of the F ' point to obtain the coordinates of the F ' ' and locating the F ' ' point;
connecting F '' with E '', a new short diameter E '' F '' is generated, said short diameter E '' F '' being parallel to the short diameter E 'F'.
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