CN103516962A - Image capturing system and method - Google Patents
Image capturing system and method Download PDFInfo
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- CN103516962A CN103516962A CN201210203053.4A CN201210203053A CN103516962A CN 103516962 A CN103516962 A CN 103516962A CN 201210203053 A CN201210203053 A CN 201210203053A CN 103516962 A CN103516962 A CN 103516962A
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Abstract
The invention discloses an image capturing system comprising a light source and an image sensor. The light source is used for generating an illuminating light. The image sensor comprises a first image sensing element and a second image sensing element, wherein relative responses of the first image sensing element and the second image sensing element to the illuminating light are different, so that the first image sensing element and the second image sensing element are enabled to sense the illuminating light which is reflected by an object or transmissive to the object and thus a first image and a second image which are different in gray-scale values are generated respectively. According to the image capturing system, a plurality of images with different gray-scale values can be obtained through one image capturing operation, so that the efficiency of the image capturing operation is improved. Meanwhile, the invention also discloses an image capturing method. According to the image capturing system and method in the embodiments of the invention, the plurality of images with different gray-scale values can be obtained through one image capturing operation, so that the efficiency of the image capturing operation is greatly improved.
Description
Technical field
The present invention relates to a kind of image acquisition system and method, particularly a kind of image acquisition system and method that can simultaneously obtain a plurality of images of different GTG values.
Background technology
Popularizing fast of image acquisition system, can store in digitized mode many objects.Yet, the object of wish acquisition, when the luminance difference in its highlights region and An Bu region is larger, X-ray for example, existing image acquisition system cannot be with identical image capture gain of parameter the clear digitized video that presents the details in highlights region and An Bu region.
For example, in order to present the details in An Bu region, user may provide brighter illumination or longer time for exposure to obtain brighter digitized video.Now, highlights region in digitized video may overexposure and a slice brilliant white, thereby cannot present the details in the highlights region in former object.Contrary, in order to present the details in highlights region, user may provide darker illumination or shorter time for exposure to obtain darker digitized video.Now, digitized video Zhong Anbu region may under-exposure and a slice is dark, thereby cannot present the details in former object Zhong Anbu region.In order to overcome the problems referred to above, existing image acquisition system is with different image capture parameters, object is carried out repeatedly to image capture and operate to obtain a plurality of images that present respectively highlights region and An Bu region details.So cause the problem of the operation shortage efficiency of image digitization.
In sum, a plurality of images that how simultaneously to obtain different GTG values are targets that the current utmost point need be made great efforts.
Summary of the invention
The invention provides a kind of image acquisition system and method, it is to provide the illumination light of narrow spectrum distribution, and utilize the first Image Sensor and the second Image Sensor characteristic different to the relative response of illumination light, produce respectively one first image and one second image of different GTG values.Therefore, image acquisition system of the present invention and method can obtain a plurality of images of different GTG values in the operation of an image capture.
The image acquisition system of one embodiment of the invention comprises a light source and an image sensor.Light source is in order to produce an illumination light.Image sensor comprises one first Image Sensor and one second Image Sensor, wherein the first Image Sensor and the second Image Sensor have difference to the relative response of illumination light, make the first Image Sensor and the second Image Sensor sensing can produce respectively one first image and one second image of different GTG values through the illumination light of an object reflection or transmission object.
The image acquisition method of another embodiment of the present invention comprises provides one in order to produce the light source of an illumination light; One image sensor is provided, and it comprises one first Image Sensor and one second Image Sensor, and wherein the first Image Sensor and the second Image Sensor have difference to the relative response of illumination light; And with the first Image Sensor of image sensor and the second Image Sensor sensing the illumination light through an object reflection or transmission object, to produce respectively one first image and one second image of different GTG values.
The image acquisition system of the embodiment of the present invention and method can obtain a plurality of images of different GTG values in the operation of an image capture, significantly promote the efficiency of image capture operation.
By specific embodiment, coordinate appended graphic explanation in detail below, when the effect that is easier to understand object of the present invention, technology contents, feature and reaches.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, does not form limitation of the invention.In the accompanying drawings:
Fig. 1 is a schematic diagram, shows the image acquisition system of one embodiment of the invention.
Fig. 2 is a curve chart, shows the spectrum distribution of the illumination light in image acquisition system of the present invention and the spectral response of a plurality of Image Sensors.
Fig. 3 is a schematic diagram, shows the image acquisition system of another embodiment of the present invention.
Fig. 4 is a flow chart, shows the image acquisition method of one embodiment of the invention.
Drawing reference numeral:
11 light sources
111 light-emitting components
112 filter elements
12 image sensor
13 image processing modules
14 optical lenses
15 drive units
151 tracks
20 objects
GL illumination light
ML multi-wavelength light
S41 ~ S44 image acquisition method
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the embodiment of the present invention is described in further details.At this, schematic description and description of the present invention is used for explaining the present invention, but not as a limitation of the invention.
Please refer to Fig. 1, the image acquisition system of one embodiment of the invention comprises a light source 11 and an image sensor 12.Light source 11 is in order to produce an illumination light GL.The person of should be noted, the illumination light that the illumination light GL that light source 11 produces is narrow spectrum distribution.For example, the spectrum distribution of illumination light GL is less than 100nm, 50nm or 25nm.Preferably, illumination light GL can be the illumination light of single-frequency spectral.For example, light source 11 can be a light-emitting diode, laser diode or cold-cathode fluorescence lamp (cold cathode fluorescent lamp, CCFL).In one embodiment, please refer to Fig. 3, light source 11 can comprise a light-emitting component 111 and a filter element 112.Light-emitting component 111 is in order to produce the multi-wavelength light ML of the wave-length coverage that comprises illumination light GL.112 of filter elements are arranged at the bright dipping side of light-emitting component 111, and the multi-wavelength light ML producing in order to filter light-emitting component 111, to produce required narrow spectrum distribution illumination light GL.
The above-mentioned explanation that continues, image sensor 12 is the illumination light GL through object 20 reflections or transmission object 20 in order to sensing, and produces respectively one first image and one second image of different GTG values.In one embodiment, image sensor 12 can be a chromatic image sensor, and therefore, it can distinguish sensing ruddiness, green glow and blue light.Or image sensor 12 can comprise one first Image Sensor and one second Image Sensor, and the first Image Sensor and the second Image Sensor have difference to the relative response of illumination light GL.According to this framework, the first Image Sensor and one second Image Sensor can produce respectively the first sensing image and second sensing image of different GTG values.In one embodiment, image sensor 12 can be a charge coupled cell (Charge Coupled Device, CCD), CMOS (Complementary Metal Oxide Semiconductor) (Complementary Metal Oxide Semiconductor, CMOS) sensor or contact-type image sensing device (Contact Image Sensor, CIS).
For example, the spectral response of ruddiness sensing element is as shown in the short dash line of Fig. 2, and the spectral response of green glow sensing element is as shown in the solid line of Fig. 2, and the spectral response of blue light sensing element is as shown in the long dotted line of Fig. 2.Suppose that the spectrum distribution of illumination light GL is near the centre wavelength of the spectral response of green glow sensing element, as shown in Figure 2, the response intensity of red/green/blue sensing element to illumination light GL, by strong to weak be respectively green glow sensing element, blue light sensing element and ruddiness sensing element.In other words, in the brightness of equal illumination light GL and under the identical time for exposure, green glow sensing element is accumulated more energy, is secondly blue light sensing element and ruddiness sensing element.Therefore, green glow sensing element can produce brighter image, and blue light sensing element and ruddiness sensing element produce respectively darker image.Therefore, image acquisition system of the present invention can obtain a plurality of images of different GTG values in the operation of an image capture, thereby promotes the efficiency of image capture operation.The person of should be noted, the spectrum distribution of illumination light GL not necessarily will comprise the centre wavelength of the spectral response of one of them sensing element, as long as the spectrum distribution of illumination light GL can make a plurality of sensing elements have difference to the response intensity of illumination light GL.
Referring again to Fig. 1, in one embodiment, image acquisition system of the present invention more comprises an image processing module 13, and itself and image sensor 12 are electrically connected.Image processing module 13 can carry out various image processing to obtaining the first image and second image of self imaging sensor 12.For example, image processing module 13 can synthesize clear the first sensing image that presents An Bu region details with clear the second sensing image that presents highlights region details, to obtain a clear resultant image that presents highlights region and An Bu region simultaneously.
In one embodiment, image acquisition system of the present invention can comprise an optical lens 14, and it is arranged at the front end of image sensor 12.Optical lens 14 can focus on illumination light GL through object 20 reflection or transmission object 20 in image sensor 12.For example, optical lens 14 can be a rod lens (rod lens) or einzel lens (single lens).
Please refer to Fig. 3, image acquisition system of the present invention can comprise a drive unit 15.In one embodiment, drive unit 15 can be connected with image sensor 12, to drive image sensor 12 to move with respect to object 20 along track 151, so that object 20 is scanned.But be not limited to this, drive unit 15 also can be connected with the platform of a placement object 20, and drive platform that object 20 is moved with respect to image sensor 12, or directly drive object 20 to move with respect to image sensor 12, also can reach the object that 12 pairs of objects 20 of image sensor scan.
Please refer to Fig. 1 and Fig. 4, so that the image acquisition method of one embodiment of the invention to be described.One light source 11 is provided, and it is in order to produce an illumination light GL (S41).Then, one image sensor 12 is provided, it comprises one first Image Sensor and one second Image Sensor (S42), and the relative response of the illumination light GL that wherein the first Image Sensor of image sensor 12 and the second Image Sensor produce light source 11 has difference.Finally, the illumination light GL with the first Image Sensor of image sensor 12 and the second Image Sensor sensing through object 20 reflections or transmission object 20, to produce respectively one first image and one second image (S43) of different GTG values.The detailed description of above-mentioned steps as previously mentioned, does not repeat them here.Preferably, image acquisition method of the present invention can comprise image processing step, and in order to the first image of different GTG values and the second image are carried out to image processing (S44), for example image is synthetic.
Comprehensively above-mentioned, image acquisition system of the present invention and method are to provide the illumination light of narrow spectrum distribution, and utilize the first Image Sensor and the second Image Sensor characteristic different to the relative response of illumination light, and produce respectively one first image and one second image of different GTG values.Therefore, image acquisition system of the present invention and method can obtain a plurality of images of different GTG values in the operation of an image capture, significantly promote the efficiency of image capture operation.
Above-described embodiment is only for technological thought of the present invention and feature are described, its object makes those skilled in the art can understand content of the present invention and implement according to this, when can not with restriction the scope of the claims of the present invention, the equalization of generally doing according to disclosed spirit changes or modifies, and must be encompassed in the scope of the claims of the present invention.
Claims (16)
1. an image acquisition system, is characterized in that, comprises:
One light source, it is in order to produce an illumination light; And
One image sensor, it comprises one first Image Sensor and one second Image Sensor, wherein said the first Image Sensor and described the second Image Sensor have difference to the relative response of described illumination light, make described the first Image Sensor and described the second Image Sensor sensing through the described illumination light of object described in an object reflection or transmission, to produce respectively one first image and one second image of different GTG values.
2. image acquisition system as claimed in claim 1, is characterized in that, the centre wavelength of the spectral response that the spectrum distribution of described illumination light comprises described the first Image Sensor.
3. image acquisition system as claimed in claim 1, is characterized in that, described light source comprises a light-emitting diode, laser diode or cold-cathode fluorescence lamp.
4. image acquisition system as claimed in claim 1, is characterized in that, described light source comprises:
One light-emitting component, it is in order to produce the multi-wavelength light of the wave-length coverage that comprises described illumination light; And
One filter element, it is arranged at the bright dipping side of described light-emitting component, in order to filter described multi-wavelength light to produce described illumination light.
5. image acquisition system as claimed in claim 1, is characterized in that, described image sensor comprises a charge coupled cell, CMOS (Complementary Metal Oxide Semiconductor) sensor or contact-type image sensing device.
6. image acquisition system as claimed in claim 1, is characterized in that, more comprises:
One optical lens, it is arranged at the light inlet side of described image sensor, in order to focus on described illumination light through object described in described object reflection or transmission in described image sensor.
7. image acquisition system as claimed in claim 1, is characterized in that, more comprises:
One image processing module, itself and described image sensor are electrically connected, in order to described the first image and described the second image are carried out to image processing.
8. image acquisition system as claimed in claim 1, is characterized in that, more comprises:
One drive unit, it is in order to drive described image sensor and described object to move relative to each other, so that described image sensor scans described object.
9. an image acquisition method, is characterized in that, comprises:
Provide a light source, in order to produce an illumination light;
One image sensor is provided, and it comprises one first Image Sensor and one second Image Sensor, and wherein said the first Image Sensor and described the second Image Sensor have difference to the relative response of described illumination light; And
Described illumination light with described the first Image Sensor and described the second Image Sensor sensing through object described in an object reflection or transmission, to produce respectively one first image and one second image of different GTG values.
10. image acquisition method as claimed in claim 9, is characterized in that, the centre wavelength of the spectral response that the spectrum distribution of described illumination light comprises described the first Image Sensor.
11. image acquisition methods as claimed in claim 9, is characterized in that, described light source comprises a light-emitting diode, laser diode or cold-cathode fluorescence lamp.
12. image acquisition methods as claimed in claim 9, is characterized in that, described light source comprises:
One light-emitting component, it is in order to produce the multi-wavelength light of the wave-length coverage that comprises described illumination light; And
One filter element, it is arranged at the bright dipping side of described light-emitting component, in order to filter described multi-wavelength light to produce described illumination light.
13. image acquisition methods as claimed in claim 9, is characterized in that, described image sensor comprises a charge coupled cell, CMOS (Complementary Metal Oxide Semiconductor) sensor or contact-type image sensing device.
14. image acquisition methods as claimed in claim 9, is characterized in that, more comprise:
Focusing through the described illumination light of object described in the reflection of described object or transmission in described image sensor.
15. image acquisition methods as claimed in claim 9, is characterized in that, more comprise:
Described the first image and described the second image are carried out to image processing.
16. image acquisition methods as claimed in claim 9, is characterized in that, more comprise:
Drive described image sensor and described object to move relative to each other, so that described image sensor scans described object.
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| CN201210203053.4A CN103516962A (en) | 2012-06-19 | 2012-06-19 | Image capturing system and method |
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| CN201210203053.4A CN103516962A (en) | 2012-06-19 | 2012-06-19 | Image capturing system and method |
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| CN111902761A (en) * | 2018-04-09 | 2020-11-06 | 浜松光子学株式会社 | Sample observation device and sample observation method |
| CN113820323A (en) * | 2020-06-19 | 2021-12-21 | 财团法人纺织产业综合研究所 | Fabric detection system and fabric detection method |
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Application publication date: 20140115 |