Method of forming a projection pattern and scanner

Abstract

A method for forming a projection pattern and a scanner are disclosed. An original projection pattern is obtained, which includes a plurality of rectangular regions adjacent to each other in a first direction. Two adjacent rectangular regions are defined as a first rectangular region and a second rectangular region. The first rectangular region and the second rectangular region have a first common side. The first rectangular region has a first display state, and the second rectangular region has a second display state. The first display state is different from the second display state. In the first rectangular region, a first boundary region is defined from the first common side away from the second rectangular region in the first direction. At least a part of the first rectangular region adjacent to outside of the first boundary region is defined as a non-boundary region. A display state of the non-boundary region is set to include the first display state and the second display state, and the first display state and the second display state are interleaved, so as to form an actual projection pattern.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of object scanning, and in particular to a high-precision projection pattern forming method and scanner. BACKGROUND

[0002] With the progress of science and technology and the improvement of living standards, light projection scanners are being used more and more widely. Generally, a scanner projects a fixed image of a projection unit onto an object to be scanned, captures the image through an image sensing device, and further calculates to obtain the shape of the object to be scanned. Most of the scanning methods used by scanners on the market are signal control methods, such as adjusting the light source current through I2C or adjusting the exposure time of the image sensing device. With the popularization of high-speed projection imaging systems, the current control signal transmission speed cannot meet the increasing scanning requirements. Especially when there are local high-reflective surfaces on the object to be scanned, full-width exposure time adjustment cannot be used to improve the situation.

[0003] Therefore, it is necessary to provide a projection pattern forming method and scanner to reduce the interference of high-reflective objects and increase the scanning accuracy of the scanner. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a projection pattern forming method and scanner to solve the above problems.

[0005] Therefore, the technical problem to be solved by the present application is to provide a projection pattern forming method, which comprises the following steps:

[0006] Step A, obtaining an original projection pattern, the original projection pattern comprising a plurality of rectangular regions adjacent to each other in a first direction, defining two adjacent rectangular regions as a first rectangular region and a second rectangular region, the first rectangular region and the second rectangular region having a first common side, the first rectangular region having a first display state, and the second rectangular region having a second display state, the first display state being different from the second display state;

[0007] Step B, in the first rectangular region, defining a first boundary region away from the second rectangular region in the first direction from the first common side, and defining at least part of the region adjacent to the outside of the first boundary region in the first rectangular region as a non-boundary region; and

[0008] Step C, setting the display state of the non-boundary region to include the first display state and the second display state and the first display state and the second display state being staggered, to form an actual projection pattern.

[0009] As an optional technical solution, in step A, the actual projection pattern is generated by the pattern generator, and the width of the first boundary region in the first direction has N unit widths, N being an integer greater than or equal to 1, wherein the unit width is the width of the smallest unit of the original projection pattern.

[0010] As an optional technical solution, in step B, the first display state is a white screen display state, and the second display state is a black screen display state.

[0011] As an optional technical solution, in the non-boundary region, the proportion of the first display state to the second display state is 3:1, 1:1, or 1:3.

[0012] As an optional technical solution, in step A, the original projection pattern further includes a third rectangular region, the third rectangular region, the first rectangular region, and the second rectangular region are sequentially arranged in the first direction, the first rectangular region and the third rectangular region have a second common long side, and the third rectangular region has the second display state; in step B, in the first rectangular region, a second boundary region is defined from the second common long side towards away from the third rectangular region along the first direction, and the remaining region outside the first boundary region and the second boundary region in the first rectangular region is defined as the non-boundary region.

[0013] The present application also provides a scanner, which comprises:

[0014] A projection system having a light source module, a pattern generator, and a first imaging module, the light source module emitting a light beam to the pattern generator, wherein the pattern generator generates an actual projection pattern which is projected to an object to be scanned via the first imaging module;

[0015] An imaging system having a second imaging module and a pattern sensing device, the second imaging module capturing a reflected pattern reflected by the object to be scanned and transmitting the reflected pattern to the pattern sensing device;

[0016] The projection system also generates a raw projection pattern, which includes a plurality of rectangular regions adjacent to each other in a first direction, and defines two adjacent rectangular regions as a first rectangular region and a second rectangular region, the first rectangular region and the second rectangular region have a first common side, the first rectangular region has a first display state, and the second rectangular region has a second display state, the first display state is different from the second display state; in the first rectangular region, from the first common side, the first direction away from the second rectangular region has a first boundary region, and at least part of the region outside the first boundary region in the first rectangular region is a non-boundary region; the display state of the non-boundary region is set to include the first display state and the second display state, and the first display state and the second display state are staggered to serve as the actual projection pattern.

[0017] As an optional technical solution, the width of the first boundary region of the actual projection pattern in the first direction has N unit widths, N is an integer greater than or equal to 1, and the unit width is the width of the smallest unit of the raw projection pattern in the first direction.

[0018] As an optional technical solution, the first display state is to display a white screen, and the second display state is to display a black screen.

[0019] As an optional technical solution, in the non-boundary region, the proportion of the first display state to the second display state is 3:1, 1:1, or 1:3.

[0020] As an optional technical solution, the raw projection pattern generated by the projection system further includes a third rectangular region, the third rectangular region, the first rectangular region, and the second rectangular region are sequentially arranged in the first direction, the first rectangular region and the third rectangular region have a second common long side, and the third rectangular region has the second display state; in the first rectangular region, from the second common long side, the first direction away from the third rectangular region has a second boundary region, and the remaining region outside the first boundary region and the second boundary region in the first rectangular region is the non-boundary region.

[0021] Compared with the prior art, the projection pattern forming method and the scanner of the present application, the operation interface of the processing unit displays the related parameters of the raw projection pattern issued by the projection system, and the user can adjust the size of the boundary region in the first direction F1, the proportion of the first display state to the second display state in the non-boundary region, and the like according to the projection requirements, so that the projection system forms an actual projection pattern that meets the actual requirements.

[0022] The present application will be described in detail below in conjunction with the drawings and specific embodiments, but not as a limitation on the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A schematic diagram of a scanner according to the present application;

[0024] Figure 2 A schematic diagram of another embodiment of a scanner according to the present application;

[0025] Figure 3 A flow chart of the steps of a method of forming a projection pattern according to the present application;

[0026] Figure 4 A schematic diagram of an embodiment of a raw projection pattern according to the present application;

[0027] Figures 5A-5C A schematic diagram of an embodiment of an actual projection pattern according to the present application;

[0028] Figure 6 A schematic diagram of a reflection pattern according to the present application;

[0029] Figures 7A-7B A schematic diagram of another embodiment of a raw projection pattern according to the present application. Embodiments

[0030] In order to enable a further understanding of the object, structure, features, and functions of the present application, embodiments will be described in detail as follows.

[0031] Reference will now be made to Figure 1 , Figure 1 A schematic diagram of a scanner according to the present application. As shown in Figure 1 , the scanner 100 comprises a projection system 110 and an image capturing system 120. The projection system 110 comprises a light source module 111, a pattern generator 112, and a first imaging module 113. The light source module 111 emits a light beam to the pattern generator 112, the pattern generator 112 generates a raw projection pattern and transmits an actual projection pattern formed by conversion of the raw projection pattern to the first imaging module 113, which projects the actual projection pattern to an object O to be scanned. The image capturing system 120 has a second imaging module 121 and a pattern sensing device 122, the second imaging module 121 captures a reflection pattern reflected by the object O to be scanned and transmits the reflection pattern to the pattern sensing device 122.

[0032] In an embodiment, the scanner 100 further comprises a control circuit 130 and a processing unit 140, the control circuit 130 is communicatively connected to the processing unit 140, and the control circuit 130 is electrically connected to the projection system 110 and the image capturing system 120, respectively; so that the processing unit 140 is electrically connected to the projection system 110 and the image capturing system 120 via the control circuit 130, respectively. Figure 1As shown, the scanner 100 further comprises a reflection unit 150, the light rays emitted from the first imaging module 113 are projected to the reflection unit 150 and then reach the object O to be scanned via the reflection of the reflection unit 150.

[0033] Please refer to Figure 4 and Figure 5A , Figure 4 FIG. 2 is a schematic diagram of an embodiment of the original projection pattern in the present application, Figure 5A FIG. 3 is a schematic diagram of an embodiment of the actual projection pattern in the present application. The projection system 110 generates the original projection pattern 200, which comprises a plurality of rectangular regions adjacent to each other in the first direction F1. The two adjacent rectangular regions are defined as the first rectangular region 210 and the second rectangular region 220. The first rectangular region 210 and the second rectangular region 220 have a first common side a1. The first rectangular region 210 has a first display state, and the second rectangular region 220 has a second display state. The first display state is different from the second display state. In the first rectangular region 210, a first boundary region 212 is formed from the first common side a1 along the first direction F1 and away from the second rectangular region 220. At least part of the region in the first rectangular region 210 outside the first boundary region 212 is a non-boundary region 211. The display state of the non-boundary region 211 is set to include the first display state and the second display state, and the first display state and the second display state are staggered to serve as the aforementioned actual projection pattern.

[0034] In a specific embodiment, the adjustment of the projection pattern described above is realized by the processing unit 140 of the scanner 100. In other words, the processing unit 140 can assist the pattern generator 112 to complete the conversion of the original projection pattern to the actual projection pattern. In addition, the processing unit 140 is electrically connected to the projection system 110 and the imaging system 120 through the control circuit 130, so as to control the related parameters of the projection system 110 and the imaging system 120. The processing unit 140 further comprises an operation interface, which is used to intuitively adjust the related parameters of the projection system 110 and the imaging system 120. In actual application, the operation interface of the processing unit 140 displays the related parameters of the original projection pattern 200 emitted by the projection system 110. The user can adjust the size of the boundary region along the first direction F1, the proportion of the first display state and the second display state in the non-boundary region, and the like according to the projection requirements, so as to make the projection system form the actual projection pattern meeting the actual requirements.

[0035] In an embodiment, the projection system 110 and the imaging system 120 are used in high-speed synchronization for projection and imaging, so as to make the scanner 100 acquire multiple sets of parameter comparisons, accelerate the scanning progress, and increase the scanning accuracy. The light source module 111 in the projection system 110 is a laser light source or an LED light source, and the present application is not limited thereto. The pattern generator 112 is a DMD or an LCD, and the present application is not limited thereto.

[0036] In one embodiment, the first imaging module 113 and the second imaging module 121 may be lens modules, and the first imaging module 113 and the second imaging module 121 respectively achieve conjugate fixed-focus imaging through the lens modules. The first imaging module 113 is disposed on the reflection path between the pattern generator 112 and the reflection unit 150 to provide first conjugate fixed-focus imaging. Specifically, the first imaging module 113 guides the geometric pattern projected from the pattern generator 112 by the light emitted from the light source module 111 onto the surface of the object O to be scanned. The imaging system 120 is located on the detection path and guides at least a portion of the light reflected from the surface of the object O to be scanned into the imaging system 120. The second imaging module 121 is disposed between the reflection unit 150 and the pattern sensing device 122 to provide second conjugate fixed-focus imaging. Specifically, the second imaging module 121 guides the light beam reflected back from the surface of the object O to be scanned and images it onto the pattern sensing device 122.

[0037] Figure 1 In the illustrated embodiment, the first imaging module 113 of the projection system 110 and the second imaging module 121 of the image acquisition system 120 are two independent modules. In other words, the projection optical path and the image acquisition optical path pass through different modules. However, this is not a limitation in actual operation. Some optical components of the projection system and the image acquisition system can be shared. Please refer to... Figure 2 , Figure 2 This is a schematic diagram of another embodiment of the scanner of the present invention. Figure 2 As shown, the first imaging module 113' and the second imaging module 121' are integrated into the same module, specifically, they can share the same set of lens modules. In this embodiment, the reflection unit 150' is composed of two reflection components with a certain included angle. The two reflection components are used to reflect the actual projected pattern to the object to be scanned and to reflect the reflected pattern of the object to be scanned to the second imaging module 121', respectively.

[0038] like Figure 2 As shown, the light source 111' emits a light beam to the pattern generator 112'. The pattern generator 112' generates an original projection pattern, which is then converted into an actual projection pattern and transmitted to the first imaging module 113'. The pattern is then projected onto the reflection unit 150' via the first imaging module 113' and reflected by the reflection unit 150' (e.g., a reflection component in the reflection unit 150') to the object O to be scanned. Subsequently, the reflected pattern from the object O is reflected by the reflection unit 150' (e.g., another reflection component in the reflection unit 150') to the second imaging module 121' and then transmitted to the pattern sensing device 122'.

[0039] Further, the projection system 110' also comprises a shared beam splitter 160' between the first imaging module 113' and the pattern generator 112', and between the second imaging module 121' and the pattern sensing device 122'. The beam splitter 160' separates the projection pattern generated by the pattern generator 112' and the reflected pattern 200" reflected by the object to be scanned, so as to prevent interference between the patterns. In this embodiment, the sharing of the optical element reduces the spatial structure of the scanner 100' and reduces the cost.

[0040] Please refer to Figures 3-5C wherein Figure 3 is a flow chart of the method for forming the projection pattern of the present application; Figure 4 is a schematic diagram of an embodiment of the original projection pattern in the present application; Figures 5A-5C is a schematic diagram of an embodiment of the actual projection pattern in the present application. The method for forming the projection pattern of the present application comprises:

[0041] Step A, obtaining an original projection pattern 200, the original projection pattern 200 comprising a plurality of rectangular regions adjacent to each other in a first direction F1. Defining two adjacent rectangular regions as a first rectangular region 210 and a second rectangular region 220, the first rectangular region 210 and the second rectangular region 220 having a first common side a1, and the first rectangular region 210 having a first display state, and the second rectangular region 220 having a second display state, the first display state being different from the second display state. In an embodiment, the original projection pattern 200 comprises at least one rectangular region adjacent to each other in a second direction F2. The second direction F2 is not parallel to the first direction F1, for example, perpendicular to each other. In an embodiment, the first rectangular region 210 and the second rectangular region 220 can have different sizes in the first direction F1, and have the same size in the second direction F2.

[0042] In an embodiment, as shown in Figure 4 , the first display state of the first rectangular region 210 is a white screen display state, and the second display state of the second rectangular region 220 is a black screen display state. Thus, by the arrangement of the first rectangular region 210 and the second rectangular region 220 adjacent to each other, a black and white striped or black and white checkered original projection pattern is formed.

[0043] In one embodiment, the projection pattern projected to the reflection unit 150 is generated by a pattern generator, which can include a plurality of micro-units arranged in an array. For example, the pattern generator is a DMD, and the micro-units are micro-mirrors; or the pattern generator is an LCD, and the micro-units are display pixels. When the projection pattern is formed, the display states of the pattern generator corresponding to adjacent rectangular regions are different (e.g., on or off), so that the display states of adjacent rectangular regions in the formed projection pattern are different, e.g., corresponding to on, a white picture display state is presented, and corresponding to off, a black picture display state is presented.

[0044] In step B, within the first rectangular region 210, a first boundary region 212 is defined away from the second rectangular region 220 along the first direction F1 from the first common side al, and at least part of the region within the first rectangular region 210 outside the first boundary region 212 is defined as a non-boundary region 211.

[0045] In one embodiment, please continue to refer to Figure 4 In one embodiment, please continue to refer to

[0046] In one embodiment, the width d of the first boundary region 211 in the first direction F1 has N unit widths, N is an integer ≥ 1, wherein the unit width is the width corresponding to the first direction F1 of the smallest unit of the pattern generator used to generate the projection pattern. If the pattern generator is a DMD, the width corresponding to the first direction F1 of the smallest unit can be the size of a micro-mirror. If the pattern generator is an LCD, the width corresponding to the first direction F1 of the smallest unit can be the size of a pixel. The user can define the width of the first boundary region 211 in the first direction F1 according to the needs.

[0047] In step C, the display state of the non-boundary region 211 is set to include the first display state and the second display state, and the first display state and the second display state are interleaved to form an actual projection pattern. In one embodiment, the first boundary region 211 of the first rectangular region 210 maintains the first display state.

[0048] In one embodiment, the first display state is a white screen display state, and the second display state is a black screen display state. Therefore, the display state of the non-boundary area 211 includes both a white screen display state and a black screen display state, with the white screen display state and the black screen display state alternating. In other words, the non-boundary area 211 is set as a pattern of alternating black and white. Figures 5A-5C In the embodiment of the actual projected pattern shown, a mosaic pattern of black and white blocks is used to form the non-boundary area 211. In practical applications, other black and white interlaced patterns can also be used to form the non-boundary area 211. Figures 5A-5C The examples shown are limited to specific examples.

[0049] In one embodiment, to prevent light interference from the highly reflective object surface during scanning, the boundary and non-boundary regions are preferably selected as rectangular areas within the white screen display state. Furthermore, in the non-boundary regions, the first display state (i.e., the white screen display state) and the second display state (i.e., the black screen display state) are interleaved and uniformly distributed. It should be noted that uniform distribution does not mean that the area ratio of the first display state to the second display state is 1:1.

[0050] like Figure 5A In the illustrated embodiment, the ratio of the area occupied by the first display state to the area occupied by the second display state in the non-boundary region 211 is 3:1, that is, the ratio of the area of ​​the white screen to the area of ​​the black screen in the non-boundary region 211 is 3:1; Figure 5B In the illustrated embodiment, the ratio of the area occupied by the first display state to the area occupied by the second display state in the non-boundary region 211 is 1:1, that is, the ratio of the area of ​​the white screen to the area of ​​the black screen in the non-boundary region 211 is 1:1; Figure 5C In the illustrated embodiment, the ratio of the area occupied by the first display state to the area occupied by the second display state in the non-boundary region 211 is 1:3, that is, the ratio of the area of ​​the white screen to the area of ​​the black screen in the non-boundary region 211 is 1:3. In practical applications, the ratio of the area occupied by the first display state and the second display state in the non-boundary region can be adjusted according to the actual needs of the projection to achieve the desired effect, and is not limited to the above ratio.

[0051] In this invention, with Figure 1 Taking the scanner 100 shown as an example, the actual projected pattern formed by the projection system 110 is irradiated onto the reflection unit 150 through the projection light path, and further projected onto the object to be scanned O. The object to be scanned O reflects the image to form a reflection pattern 200.

[0052] Please refer to Figure 7A and Figure 7B , Figure 7A and Figure 7BFig. 1 shows a schematic diagram of an original projection pattern according to an embodiment of the present application. As shown in Fig. 1, the original projection pattern 100 comprises a first rectangular region 110 and a second rectangular region 120. The first rectangular region 110 and the second rectangular region 120 are arranged in sequence along a first direction F1. In an embodiment, the first direction F1 can be the direction in which the length or width of the rectangular region extends. In an embodiment, the original projection pattern 100 comprises at least one adjacent rectangular region along a second direction F2. The second direction F2 is not parallel to the first direction F1, for example, perpendicular to each other. In an embodiment, the first rectangular region 110 and the second rectangular region 120 have equal or unequal dimensions along the first direction F1 and equal dimensions along the second direction F2. Figure 7A As shown in Fig. 3, the first rectangular region 310 and the second rectangular region 320 have a first common side a1, and the first rectangular region 310 and the third rectangular region 330 have a second common side a2. In an embodiment, the first rectangular region 310 has a first display state, the second rectangular region 320 has a second display state, and the third rectangular region 330 exhibits the second display state, so that the third rectangular region 330, the first rectangular region 310, and the second rectangular region 320 form an alternating arrangement of different display states. In an embodiment, the first display state is a white picture display state, and the second display state is a black picture display state, so that the first rectangular region 310, the second rectangular region 320, and the third rectangular region 330 exhibit a black-and-white overall picture.

[0053] As shown in Fig. 3, the first rectangular region 310 and the second rectangular region 320 have a first common side a1, and the first rectangular region 310 and the third rectangular region 330 have a second common side a2. In an embodiment, the first rectangular region 310 has a first display state, the second rectangular region 320 has a second display state, and the third rectangular region 330 exhibits the second display state, so that the third rectangular region 330, the first rectangular region 310, and the second rectangular region 320 form an alternating arrangement of different display states. In an embodiment, the first display state is a white picture display state, and the second display state is a black picture display state, so that the first rectangular region 310, the second rectangular region 320, and the third rectangular region 330 exhibit a black-and-white overall picture. Figure 7A

[0054] In an embodiment, the first boundary region 312 and the second boundary region 313 of the first rectangular region 310 maintain the first display state.

[0055] In an embodiment, the first display state and the second display state of the non-boundary region 311 are set to be alternating, so as to form an actual projection pattern. In an embodiment, the first boundary region 312 and the second boundary region 313 of the first rectangular region 310 maintain the first display state. ​

[0056] like Figure 7A As shown, in this embodiment, the first display state is a white screen display state, and the second display state is a black screen display state, thereby setting the display state of the non-boundary area 311 to include both white screen and black screen display states, with the white screen and black screen display states alternating. Furthermore, the first boundary area 312 and the second boundary area 313 are configured to maintain a white screen display state. In actual operation, the ratio of the area occupied by the first display state and the area occupied by the second display state in the non-boundary area 311 can be set as needed.

[0057] Figure 7A In the illustrated embodiment, the first rectangular area 310 is displayed in a white screen state. A boundary area is provided on each of the opposite sides of the first rectangular area 310 along the first direction F1, while the adjacent second rectangular area 320 and third rectangular area 330, which are displayed in a black screen state, do not have boundary areas. Figure 7B In the illustrated embodiment, during the formation of the projection pattern, in step B, a first boundary region 322 is defined within the second rectangular region 320, extending from the first common side a1 along the first direction F1 towards a direction away from the first rectangular region 310; a second boundary region 332 is defined within the third rectangular region 330, extending from the second common long side a2 along the first direction F1 towards a direction away from the first rectangular region 310; at least a portion of the remaining area outside the first boundary region 322 in the second rectangular region 320 is the non-boundary region 321 of the second rectangular region 320; at least a portion of the remaining area outside the second boundary region 332 in the third rectangular region 330 is the non-boundary region 331 of the third rectangular region 320. Thus, no boundary region is set in the first rectangular region 310 located between the second rectangular region 320 and the third rectangular region 330 when displaying a black screen, while boundary regions are set at the positions adjacent to the first rectangular region 310 when displaying a white screen, including the second rectangular region 320 and the third rectangular region 330.

[0058] In summary, the projection pattern forming method and scanner of the present invention display the relevant parameters of the original projection pattern emitted by the projection system on the operation interface of the processing unit. Users can adjust, for example, the size of the boundary area along the first direction F1, the ratio of the first display state to the second display state in the non-boundary area, etc., according to projection requirements, so that the projection system can form an actual projection pattern that meets the actual requirements.

[0059] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A method for forming a projection pattern, applied to a scanner, characterized in that... include, Step A: Obtain an original projection pattern generated by the pattern generator. The original projection pattern contains a plurality of adjacent rectangular regions in a first direction. Define two adjacent rectangular regions as a first rectangular region and a second rectangular region. The first rectangular region and the second rectangular region have a first shared edge. The first rectangular region has a first display state and the second rectangular region has a second display state. The first display state and the second display state are different. Step B: Within the first rectangular region, a first boundary region is defined along the first direction from the first common edge away from the second rectangular region, and at least a portion of the region within the first rectangular region adjacent to the first boundary region is defined as a non-boundary region. as well as Step C: Set the display state of the non-boundary area to include the first display state and the second display state, with the first display state and the second display state interleaved, so as to form an actual projection pattern; The first boundary region has the first display state, which is a white screen display state, and the second display state is a black screen display state. The scanner includes a projection system and an image acquisition system. The projection system has a light source module, a pattern generator, and a first imaging module. The light source module emits a light beam to the pattern generator, which generates the actual projected pattern and projects it onto the object to be scanned via the first imaging module. The image acquisition system has a second imaging module and a pattern sensing device. The second imaging module captures the reflected pattern reflected by the object to be scanned and transmits the reflected pattern to the pattern sensing device.

2. The method for forming a projection pattern according to claim 1, characterized in that, In step A, the actual projection pattern is generated by the pattern generator. The width of the first boundary region in the first direction has N units, where N is an integer ≥ 1. The unit width is the width of the smallest unit of the original projection pattern.

3. The method for forming a projection pattern according to claim 1, characterized in that, In the non-boundary area, the ratio of the first display state to the second display state is 3:1, 1:1, or 1:

3.

4. The method for forming a projection pattern according to claim 1, characterized in that, In step A, the original projection pattern further includes a third rectangular region. The third rectangular region, the first rectangular region, and the second rectangular region are arranged sequentially in the first direction. The first rectangular region and the third rectangular region have a second common long side, and the third rectangular region has the second display state. In step B, within the first rectangular region, a second boundary region is defined from the second common long side toward the first direction away from the third rectangular region. The first boundary region and the remaining area outside the second boundary region within the first rectangular region are defined as the non-boundary region.

5. A scanner, characterized in that, The scanner contains: The projection system includes a light source module, a pattern generator, and a first imaging module. The light source module emits a light beam to the pattern generator, and the pattern generator generates an actual projection pattern, which is then projected onto the object to be scanned via the first imaging module. The imaging system has a second imaging module and a pattern sensing device. The second imaging module captures the reflected pattern reflected by the object to be scanned and transmits the reflected pattern to the pattern sensing device. The process of generating the actual projection pattern by the pattern generator includes: generating an original projection pattern comprising a plurality of adjacent rectangular regions along a first direction; defining two adjacent rectangular regions as a first rectangular region and a second rectangular region; the first rectangular region and the second rectangular region sharing a first common edge; the first rectangular region having a first display state; and the second rectangular region having a second display state, the first display state being different from the second display state; within the first rectangular region, a first boundary region is located away from the second rectangular region along the first direction from the first common edge; at least a portion of the region outside the first boundary region within the first rectangular region is a non-boundary region; the display state of the non-boundary region is set to include both the first display state and the second display state, with the first display state and the second display state interleaved to form the actual projection pattern; the first boundary region having the first display state, the first display state being a white screen display state; and the second display state being a black screen display state.

6. The scanner according to claim 5, characterized in that, The width of the first boundary region of the actual projected pattern in the first direction is N units, where N is an integer ≥ 1, and the unit width is the width of the smallest unit of the original projected pattern along the first direction.

7. The scanner according to claim 5, characterized in that, In the non-boundary area, the ratio of the first display state to the second display state is 3:1, 1:1, or 1:

3.

8. The scanner according to claim 5, characterized in that, The original projection pattern generated by the projection system also includes a third rectangular region. The third rectangular region, the first rectangular region, and the second rectangular region are arranged sequentially in the first direction. The first rectangular region and the third rectangular region have a second shared long side, and the third rectangular region has the second display state. Within the first rectangular region, there is a second boundary region that extends away from the third rectangular region along the first direction from the second shared long side. The remaining area outside the first boundary region and the second boundary region within the first rectangular region is the non-boundary region.

Images