Image scanning device and image scanning method

Abstract

The present invention provides an image scanning device, comprising an image encoding module and an image acquisition module; the image encoding module comprises a monochromatic light source and a light source driving module; the monochromatic light source is input into the light source driving module, the light source driving module is used to convert the monochromatic light source into an RGB light source and output the RGB light source, the RGB light source is used to project a scanning target, the image acquisition module is used to receive the reflected light of the scanning target projected by the RGB light source, and collect image data. The present invention also provides an image scanning method.

Description

[Technical field]

[0001] The present invention relates to the field of scanning technology, and in particular to an image scanning device and an image scanning method. [Background technology]

[0002] In recent years, with the advancement of science and technology, the technology of scanning a scanning target using a scanning device has developed rapidly. Existing scanning devices usually only have a monochromatic light source. When a monochromatic light source is used to project a scanning target, part of the color of the scanning target will fail. For example, when the monochromatic light source is blue light, the red part of the scanning target will fail, and the color reproduction of the scanning target is poor, which reduces the scanning accuracy of the image scanning device.

[0003] In view of this, it is necessary to provide a new image scanning device and an image scanning method to overcome the above-mentioned defects. [Summary of the invention]

[0004] The object of the present invention is to provide an image scanning device and an image scanning method which can avoid partial color failure of a scanned target, avoid poor color reproduction of a scanned target, scan targets of all colors, and improve scanning accuracy.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an image scanning device, including an image encoding module and an image acquisition module; the image encoding module includes a monochromatic light source and a light source driving module; the monochromatic light source is input into the light source driving module, the light source driving module is used to convert the monochromatic light source into an RGB light source and output the RGB light source, the RGB light source is used to project a scanning target, and the image acquisition module is used to receive the reflected light of the RGB light source projecting the scanning target and collect image data.

[0006] In a preferred embodiment, the monochromatic light source is one of red light, green light or blue light.

[0007] In a preferred embodiment, the light source driving module includes a driving chip, and the driving chip includes a monochromatic light input terminal, a red light output terminal, a green light output terminal, a blue light output terminal and a power supply terminal; the monochromatic light input terminal is used to input the monochromatic light source, the red light output terminal is connected to the red LED and then connected to the power supply terminal, the green light output terminal is connected to the green LED and then connected to the power supply terminal, the blue light output terminal is connected to the blue LED and then connected to the power supply terminal, and the power supply terminal is used to provide lighting power for the red LED, green LED and blue LED; the RGB light source lights up the red LED, green LED and blue LED at the same time.

[0008] In a preferred embodiment, the light source driving module also includes a power supply module, which includes a first power supply unit, a second power supply unit and a third power supply unit; the first power supply unit is used to power the red LED, and the positive terminal of the first power supply unit is connected to the power supply end of the driving chip, and the negative terminal of the first power supply unit is connected to the red LED through a boost resistor; the second power supply unit is used to power the green LED, and the positive terminal of the second power supply unit is connected to the power supply end of the driving chip, and the negative terminal of the second power supply unit is connected to the green LED; the third power supply unit is used to power the blue LED, and the positive terminal of the third power supply unit is connected to the power supply end of the driving chip, and the third power supply unit is connected to the blue LED; the negative terminal of the first power supply unit, the negative terminal of the second power supply unit and the negative terminal of the third power supply unit are connected together.

[0009] In a preferred embodiment, the power supply terminal of the driving chip is connected to the power supply module via a voltage stabilizing capacitor, and the voltage stabilizing capacitor is used to stabilize the voltage output by the power supply module.

[0010] In a preferred embodiment, the projection frequency of the RGB light source is 360 Hz.

[0011] In a preferred embodiment, the image acquisition module collects image data at a frequency of 180 Hz.

[0012] In a preferred embodiment, it further comprises an image processing module, wherein the image processing module is used to perform computational processing on the image data and output a scan file.

[0013] The present invention also provides an image scanning method, comprising the following steps: inputting a monochromatic light source; converting the monochromatic light source into an RGB light source and outputting the RGB light source, wherein the RGB light source is used to project a scanning target; receiving reflected light from the RGB light source projecting the scanning target, and collecting image data.

[0014] In a preferred embodiment, after the step of receiving the reflected light of the scanning target projected by the RGB light source and collecting image data, the following step is also included: performing calculation processing on the image data and outputting a scan file.

[0015] Compared with the prior art, the image scanning device and the image scanning method provided by the present invention avoid the failure of some colors of the scanning target and the poor color reproduction of the scanning target when a monochromatic light source is projected, and can scan scanning targets of all colors, thereby improving the scanning accuracy. In addition, the image scanning device and the image scanning method provided by the present invention have a higher projection speed and acquisition speed, which can reduce the crosstalk caused by the jitter of the scanning device or the scanning target on the image data, thereby further improving the accuracy of image scanning.

[0016] In order to make the above-mentioned objects, features and advantages of the invention more obvious and easy to understand, the preferred embodiments of the present invention are specifically cited below and described in detail with reference to the attached drawings.

Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A functional block diagram of an image scanning device provided by a preferred embodiment of the present invention;

[0019] Figure 2 for Figure 1 The principle block diagram of the light source driving module of the image scanning device shown;

[0020] Figure 3 Flow chart of an image scanning method provided by a preferred embodiment of the present invention. [Specific implementation method]

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0022] See also Figure 1 , Figure 1The image scanning device 100 provided by the preferred embodiment of the present invention comprises an image encoding module 10 and an image acquisition module 20.

[0023] Please also read Figure 2 , Figure 2 for Figure 1 The principle block diagram of the light source driving module 20 of the image scanning device 100 shown in the figure. The image encoding module 10 includes a monochromatic light source 11 and a light source driving module 12; the monochromatic light source 11 is input into the light source driving module 12, the light source driving module 20 is used to convert the monochromatic light source 11 into an RGB light source 101 and output the RGB light source 101, the RGB light source 101 is used to project the scanning target, and the image acquisition module 20 is used to receive the reflected light projected by the RGB light source 101 on the scanning target and collect image data.

[0024] In the image scanning device 100 provided by the present invention, after the monochromatic light source 11 is input into the light source driving module 12, the light source driving module 12 converts the monochromatic light source 11 into an RGB light source 101 and outputs it, and the RGB light source 101 illuminates the scanning target. Specifically, the RGB light source is a multi-color light source formed by lighting up a plurality of monochromatic light sources together. After the multi-color light source is projected onto the scanning target, it can reflect all the colors of the scanning target. The image acquisition module 20 receives the reflected light of the multi-color light source illuminating the scanning target and collects image data. That is, the image data collected by the image acquisition module 20 of the image scanning device 100 provided by the present invention is the image data formed by the reflected light of the multi-color light source illuminating the scanning target. Therefore, the image scanning device 100 provided by the present invention can scan scanning targets of all colors, avoiding the problem of partial color failure of the scanning target and poor color reproduction of the scanning target when a monochromatic light source is used for projection, thereby improving the scanning accuracy.

[0025] Specifically, the monochromatic light source 11 is one of red light, green light or blue light. The light source driving module 12 includes a driving chip 121, and the driving chip 121 includes a monochromatic light input terminal IN, a red light output terminal R_OUT, a green light output terminal G_OUT, a blue light output terminal B_OUT and a power supply terminal VLED; the monochromatic light input terminal IN is used to input the monochromatic light source 11, the red light output terminal R_OUT is connected to the red LED 13 and then connected to the power supply terminal VLED, the green light output terminal G_OUT is connected to the green LED 14 and then connected to the power supply terminal VLED, the blue light output terminal B_OUT is connected to the blue LED 15 and then connected to the power supply terminal VLED, and the power supply terminal VLED is used to provide lighting power for the red LED 13, the green LED 14 and the blue LED 15; the RGB light source 101 lights up the red LED 13, the green LED 14 and the blue LED 15 at the same time. Since the red LED 13, the green LED 14 and the blue LED 15 are all connected to the power supply terminal VLED, when any monochromatic light source 10 is input into the driving chip 121, the red LED 13, the green LED 14 and the blue LED 15 will all light up to form an RGB light source 101, that is, the monochromatic light source is replaced with a multi-color light source, avoiding the problem that the color of part of the scanning target is invalid when the monochromatic light source is projected onto the scanning target. In this embodiment, the multi-color light source is a three-primary color light source of red light, green light and blue light, that is, the output RGB light source is white light, and white light can scan scanning targets of all colors, thereby improving the scanning accuracy.

[0026] The light source driving module 12 also includes a power supply module 122, which includes a first power supply unit 123, a second power supply unit 124 and a third power supply unit 125; the first power supply unit 123 is used to supply power to the red LED 13, and the positive terminal of the first power supply unit 123 is connected to the power supply terminal VLED of the driving chip 121, and the negative terminal of the first power supply unit 123 is connected to the red LED 13 through the boost resistor R1; the second power supply unit 124 is used to supply power to the green LED 14, and the positive terminal of the second power supply unit 124 is connected to the power supply terminal VLED of the driving chip 121, and the negative terminal of the second power supply unit 124 is connected to the green LED 14; the third power supply unit 125 is used to supply power to the blue LED 15, and the positive terminal of the third power supply unit 125 is connected to the power supply terminal VLED of the driving chip 121, and the negative terminal of the third power supply unit 125 is connected to the blue LED 15; the negative terminal of the first power supply unit 123, the negative terminal of the second power supply unit 124 and the negative terminal of the third power supply unit 125 are connected together.

[0027] Furthermore, the power supply terminal VLED of the driver chip 121 is connected to the power supply module 122 through the voltage-stabilizing capacitor C1, that is, the positive terminal of the first power supply unit 123, the positive terminal of the second power supply unit 124 and the positive terminal of the third power supply unit 125 are all connected to the power supply terminal VLED of the driver chip 121 through the voltage-stabilizing capacitor C1, and the voltage-stabilizing capacitor C1 is used to stabilize the voltage output by the power supply module 25.

[0028] In this embodiment, the projection frequency of the RGB light source 101 is 360HZ, that is, after the monochromatic light source 10 is input into the driver chip 121, the red LED 13 connected to the red light output terminal R_OUT, the green LED 14 connected to the green light output terminal G_OUT, and the blue LED 15 connected to the blue light output terminal B_OUT are lit at the same time, and the three primary color light sources of red light, green light and blue light are all projected to the scanning target, realizing the 360HZ projection of white light, that is, the white light projects 360 images per second, with a high projection speed. Specifically, the image encoding module 10 is a DLP (Digital Light Processing) chip, which converts the 8-bit color depth signal into 24-bit after inputting the 120HZ monochromatic light signal, that is, the 8-bit color depth signal, and outputs the light signal through the 24-bit channel, that is, the encoded images corresponding to the three monochromatic light signals can be projected separately in time division, realizing 360HZ projection, and the light signal transmission channel is changed from one channel to three channels.

[0029] The image acquisition module 20 collects image data at a frequency of 180HZ. Specifically, the image acquisition module 20 is an image sensor, and the image sensor is a CCD image sensor (Charge Coupled Device). The CCD image sensor converts image light signals into image electrical signals. The image sensor collects 180 images per second and has a relatively high collection speed.

[0030] The image scanning device 100 provided by the present invention has a higher projection speed and a higher acquisition speed, which can reduce the crosstalk caused by the jitter of the scanning device or the scanning target on the image data, and further improve the accuracy of image scanning.

[0031] The image scanning device 100 provided by the present invention further includes an image processing module 30, which is used to perform calculations on the image data and output a scan file. Specifically, the image processing module calculates the position and depth information of the scanned target according to the reflection change of the light signal on the surface of the scanned target, and can restore the three-dimensional appearance of the scanned target.

[0032] The image scanning device 100 provided by the present invention avoids the partial color failure of the scanning target and the poor color reproduction of the scanning target when a monochromatic light source is projected. It can scan scanning targets of all colors and improves scanning accuracy. In addition, the image scanning device 100 provided by the present invention has a higher projection speed and acquisition speed.

[0033] See also Figure 3 The preferred embodiment of the present invention also provides an image scanning method, comprising the following steps:

[0034] S01: input monochromatic light source;

[0035] S02: converting the monochromatic light source into an RGB light source and outputting the RGB light source, wherein the RGB light source is used to project a scanning target;

[0036] S03: receiving the reflected light from the RGB light source projecting the scanning target, and collecting image data.

[0037] Specifically, after step S03, the following steps are also included:

[0038] Step S04: performing computational processing on the image data and outputting a scanned file.

[0039] It should be noted that the above Figure 1 In the embodiment, the explanation of the image scanning device 100 is also applicable to the image scanning method of this embodiment, and the implementation principle is similar, which will not be repeated here.

[0040] The image scanning device and the image scanning method provided by the present invention avoid the partial color failure of the scanning target and the poor color reproduction of the scanning target when the monochromatic light source is projected, and can scan the scanning target of all colors, thereby improving the scanning accuracy; moreover, the image scanning device and the image scanning method provided by the present invention have a high projection speed and acquisition speed, which can reduce the crosstalk caused by the jitter of the scanning device or the scanning target on the image data, thereby further improving the accuracy of image scanning.

[0041] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An image scanning device, characterized in that: It includes an image encoding module and an image acquisition module; the image encoding module includes a monochromatic light source and a light source driving module; the monochromatic light source is input into the light source driving module, the light source driving module is used to convert the monochromatic light source into an RGB light source and output the RGB light source, and the RGB light source is used to project the scanning target; the image acquisition module is used to receive the reflected light of the scanning target projected by the RGB light source and collect image data; The monochromatic light source is one of red light, green light or blue light; The light source driving module includes a driving chip, and the driving chip includes a monochromatic light input terminal, a red light output terminal, a green light output terminal, a blue light output terminal and a power supply terminal; the monochromatic light input terminal is used to input the monochromatic light source, the red light output terminal is connected to the red LED and then connected to the power supply terminal, the green light output terminal is connected to the green LED and then connected to the power supply terminal, the blue light output terminal is connected to the blue LED and then connected to the power supply terminal, and the power supply terminal is used to provide lighting power for the red LED, the green LED and the blue LED; the RGB light source lights up the red LED, the green LED and the blue LED at the same time; when any monochromatic light source is input into the driving chip, the red LED, the green LED and the blue LED will all light up to form an RGB light source.

2. The image scanning device according to claim 1, wherein: The light source driving module also includes a power supply module, which includes a first power supply unit, a second power supply unit and a third power supply unit; the first power supply unit is used to supply power to the red LED, and the positive terminal of the first power supply unit is connected to the power supply terminal of the driving chip, and the negative terminal of the first power supply unit is connected to the red LED through a boost resistor; the second power supply unit is used to supply power to the green LED, and the positive terminal of the second power supply unit is connected to the power supply terminal of the driving chip, and the negative terminal of the second power supply unit is connected to the green LED; the third power supply unit is used to supply power to the blue LED, and the positive terminal of the third power supply unit is connected to the power supply terminal of the driving chip, and the negative terminal of the third power supply unit is connected to the blue LED; the negative terminal of the first power supply unit, the negative terminal of the second power supply unit and the negative terminal of the third power supply unit are connected together.

3. The image scanning device according to claim 2, wherein: The power supply end of the driving chip is connected to the power supply module via a voltage stabilizing capacitor, and the voltage stabilizing capacitor is used to stabilize the voltage output by the power supply module.

4. The image scanning device according to claim 3, wherein: The projection frequency of the RGB light source is 360HZ.

5. The image scanning device according to claim 4, wherein: The image acquisition module collects image data at a frequency of 180 Hz.

6. The image scanning device according to claim 1, wherein: It also includes an image processing module, which is used to perform calculations on the image data and output a scan file.

7. An image scanning method, characterized in that: The steps include: Input a monochromatic light source; the monochromatic light source is one of red light, green light or blue light; The monochromatic light source is converted into an RGB light source and outputted through a light source driving module, and the RGB light source is used to project a scanning target; the light source driving module comprises a driving chip, and the driving chip comprises a monochromatic light input terminal, a red light output terminal, a green light output terminal, a blue light output terminal and a power supply terminal; the monochromatic light input terminal is used to input the monochromatic light source, the red light output terminal is connected to the power supply terminal after being connected to a red LED, the green light output terminal is connected to the power supply terminal after being connected to a green LED, the blue light output terminal is connected to the power supply terminal after being connected to a blue LED, and the power supply terminal is used to provide lighting power for the red LED, the green LED and the blue LED; the RGB light source lights up the red LED, the green LED and the blue LED at the same time; when any monochromatic light source is input to the driving chip, the red LED, the green LED and the blue LED will all light up to form an RGB light source; Receive the reflected light projected by the RGB light source on the scanning target and collect image data.

8. The image scanning method according to claim 7, wherein: After the step of receiving the reflected light projected by the RGB light source on the scanning target and collecting image data, the following steps are also included: The image data is processed by calculation and a scan file is output.

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