CN111050085B - System and method for eliminating environment backlight of 3D contour camera - Google Patents
System and method for eliminating environment backlight of 3D contour camera Download PDFInfo
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- CN111050085B CN111050085B CN201911165303.8A CN201911165303A CN111050085B CN 111050085 B CN111050085 B CN 111050085B CN 201911165303 A CN201911165303 A CN 201911165303A CN 111050085 B CN111050085 B CN 111050085B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
Abstract
The invention discloses a 3D contour camera environment backlight elimination system and a method, wherein the 3D contour camera comprises a laser light source, an image sensor array and a data processing unit, and the 3D contour camera environment backlight elimination method comprises the following steps: detecting whether the exposure parameters of the 3D contour camera are modified; if yes, turning off the laser light source; the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
Description
[ technical field ] A method for producing a semiconductor device
The invention is applied to a 3D contour camera, in particular to a system and a method for eliminating the environment backlight of the 3D contour camera.
[ background of the invention ]
The 3D contour camera is widely used in the field of industrial testing, but due to the diversity and complexity of the test object and the light irradiation, the image presented by the photosensitive array in the camera has many interfering elements, such as the ambient backlight, and effectively removing the influence of the ambient backlight plays a very important role in improving the testing accuracy of the 3D contour camera.
[ summary of the invention ]
The invention aims to provide a system and a method for eliminating environmental backlight of a 3D contour camera, which are used for solving the problem that the testing precision is influenced by the environmental backlight in the existing 3D contour camera.
To achieve the above object, a 3D contour camera ambient backlight elimination system embodying the present invention comprises:
an exposure parameter adjusting unit for controlling the exposure parameters of the 3D contour camera;
the laser light source is turned on or turned off according to the control instruction of the exposure parameter adjusting unit;
an image sensor array to acquire an image of an external environment or object;
the data processing unit is used for receiving and processing the data output by the image sensor array;
a dark noise table storage unit for storing the dark noise table generated by the data processing unit;
a control unit for controlling the operation of each functional unit;
when the control unit controls the exposure parameter adjusting unit to modify the exposure parameters, the exposure parameter adjusting unit closes the laser light source, the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table and stores the dark noise table in the dark noise table storage unit, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
According to the above main feature, the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects the maximum value as the dark noise of the current column.
According to the above main feature, the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects an average value of the data of the current column as the dark noise of the current column.
To achieve the above object, a 3D contour camera ambient backlight elimination system embodying the present invention comprises:
the time control unit is used for timing;
the laser light source is turned on or off according to a control instruction of the time control unit;
an image sensor array to acquire an image of an external environment or object;
the data processing unit is used for receiving and processing the data output by the image sensor array;
a dark noise table storage unit for storing the dark noise table generated by the data processing unit;
a control unit for controlling the operation of each functional unit;
when the time control unit sends a control instruction to turn off the laser light source when the preset time is reached, the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table and stores the dark noise table in the dark noise table storage unit, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
According to the above main feature, the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects the maximum value as the dark noise of the current column.
According to the above main feature, the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects an average value of the data of the current column as the dark noise of the current column.
In order to achieve the above object, the present invention provides a method for eliminating an ambient backlight of a 3D contour camera, the 3D contour camera including a laser light source, an image sensor array and a data processing unit, the method comprising the steps of:
detecting whether the exposure parameters of the 3D contour camera are modified;
if yes, turning off the laser light source;
the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
According to the above main feature, the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects the maximum value as the dark noise of the current column.
According to the above main feature, the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects an average value of the data of the current column as the dark noise of the current column.
In order to achieve the above object, the present invention provides a method for eliminating an ambient backlight of a 3D contour camera, the 3D contour camera including a laser light source, an image sensor array and a data processing unit, the method comprising the steps of:
judging whether the preset time is reached;
if yes, turning off the laser light source;
the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
Compared with the prior art, the method and the device have the advantages that the dark noise table is generated again when the exposure parameters of the 3D contour camera are modified or after the preset time, and the image data sampled by the 3D contour camera is processed by the dark noise table, so that the influence caused by the ambient backlight can be eliminated, and the testing precision of the 3D contour camera is improved.
[ description of the drawings ]
FIG. 1 is a block diagram of a first embodiment of the present invention.
FIG. 2 is a block diagram of a second embodiment of the present invention.
FIG. 3 is a first flow chart illustrating the practice of the present invention.
FIG. 4 is a second schematic flow chart for carrying out the present invention.
[ detailed description ] embodiments
Fig. 1 is a schematic diagram of a composition framework for implementing the first embodiment of the present invention. A3D contour camera ambient backlight elimination system embodying the present invention comprises:
an exposure parameter adjusting unit for controlling an exposure parameter, such as an exposure duration or a gain, of the 3D profile camera;
the laser light source is turned on or turned off according to the control instruction of the exposure parameter adjusting unit;
an image sensor array to acquire an image of an external environment or object;
the data processing unit is used for receiving and processing the data output by the image sensor array;
a dark noise table storage unit for storing the dark noise table generated by the data processing unit;
a control unit for controlling the operation of each functional unit;
when the control unit controls the exposure parameter adjusting unit to modify the exposure parameters, the exposure parameter adjusting unit closes the laser light source, the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table and stores the dark noise table in the dark noise table storage unit, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
In specific implementation, the data processing unit performs data processing on data of the same column output by the image sensor array, and selects the maximum value as the dark noise of the column. Or the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects an average value of the data of the current column as the dark noise of the current column.
Fig. 2 is a schematic diagram of a composition framework for implementing a second embodiment of the present invention. A3D contour camera ambient backlight elimination system embodying the present invention comprises:
the time control unit is used for timing;
the laser light source is turned on or off according to a control instruction of the time control unit;
an image sensor array to acquire an image of an external environment or object;
the data processing unit is used for receiving and processing the data output by the image sensor array;
a dark noise table storage unit for storing the dark noise table generated by the data processing unit;
a control unit for controlling the operation of each functional unit;
when the time control unit sends a control instruction to turn off the laser light source when the preset time is reached, the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table and stores the dark noise table in the dark noise table storage unit, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
In specific implementation, the data processing unit performs data processing on data of the same column output by the image sensor array, and selects the maximum value as the dark noise of the column. Or the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects an average value of the data of the current column as the dark noise of the current column.
Of course, a more accurate dark noise table can be obtained after analysis processing is performed according to the distribution of the row and column data, so as to embody more detailed characteristics. The timing function can be implemented in the 3D profile camera, or in an upper computer (e.g., a test system controlling the 3D profile camera), and the exposure parameters may not be modified when the dark noise table is updated periodically.
Referring to fig. 3, a first flowchart for implementing the present invention is a method for implementing the 3D contour camera environment backlight elimination of the present invention, wherein the 3D contour camera includes a laser light source, an image sensor array and a data processing unit, the method includes the following steps:
detecting whether the exposure parameters of the 3D contour camera are modified;
if yes, turning off the laser light source;
the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
In specific implementation, the data processing unit performs data processing on data of the same column output by the image sensor array, and selects the maximum value as the dark noise of the column. Or the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects an average value of the data of the current column as the dark noise of the current column.
Referring to fig. 4, a second flowchart for implementing the present invention is a 3D contour camera environment backlight elimination method for implementing the present invention, where the 3D contour camera includes a laser light source, an image sensor array and a data processing unit, the method includes the following steps:
judging whether the preset time is reached;
if yes, turning off the laser light source;
the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
In specific implementation, the data processing unit performs data processing on data of the same column output by the image sensor array, and selects the maximum value as the dark noise of the column. Or the data processing unit performs data processing on the data of the same column output by the image sensor array, and selects an average value of the data of the current column as the dark noise of the current column.
Compared with the prior art, the method and the device have the advantages that the dark noise table is generated again when the exposure parameters of the 3D contour camera are modified or after the preset time, and the image data sampled by the 3D contour camera is processed by the dark noise table, so that the influence caused by the ambient backlight can be eliminated, and the testing precision of the 3D contour camera is improved.
Those of ordinary skill in the art will appreciate that the method steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The method steps described in connection with the embodiments disclosed herein may be embodied in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, CD-ROM, or any other form of storage medium known in the art.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. A 3D contour camera ambient backlight elimination system, the 3D contour camera ambient backlight elimination system comprising:
an exposure parameter adjusting unit for controlling the exposure parameters of the 3D contour camera;
the laser light source is turned on or turned off according to the control instruction of the exposure parameter adjusting unit;
an image sensor array to acquire an image of an external environment or object;
the data processing unit is used for receiving and processing the data output by the image sensor array;
a dark noise table storage unit for storing the dark noise table generated by the data processing unit;
a control unit for controlling the operation of each functional unit;
when the control unit controls the exposure parameter adjusting unit to modify the exposure parameters, the exposure parameter adjusting unit closes the laser light source, the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table and stores the dark noise table in the dark noise table storage unit, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
2. The 3D contour camera ambient backlight elimination system of claim 1, wherein: and the data processing unit is used for processing the data of the same column output by the image sensor array and selecting the maximum value as the dark noise of the column.
3. The 3D contour camera ambient backlight elimination system of claim 1, wherein: and the data processing unit is used for processing the data of the same column output by the image sensor array, and selecting the average value of the data of the column as the dark noise of the column.
4. A 3D contour camera ambient backlight elimination system, the 3D contour camera ambient backlight elimination system comprising:
the time control unit is used for timing;
the laser light source is turned on or off according to a control instruction of the time control unit;
an image sensor array to acquire an image of an external environment or object;
the data processing unit is used for receiving and processing the data output by the image sensor array;
a dark noise table storage unit for storing the dark noise table generated by the data processing unit;
a control unit for controlling the operation of each functional unit;
when the time control unit sends a control instruction to turn off the laser light source when the preset time is reached, the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table and stores the dark noise table in the dark noise table storage unit, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
5. The 3D contour camera ambient backlight elimination system of claim 4, wherein: and the data processing unit is used for processing the data of the same column output by the image sensor array and selecting the maximum value as the dark noise of the column.
6. The 3D contour camera ambient backlight elimination system of claim 4, wherein: and the data processing unit is used for processing the data of the same column output by the image sensor array, and selecting the average value of the data of the column as the dark noise of the column.
7. A3D contour camera environment backlight elimination method is disclosed, the 3D contour camera comprises a laser light source, an image sensor array and a data processing unit, and the method is characterized by comprising the following steps:
detecting whether the exposure parameters of the 3D contour camera are modified;
if yes, turning off the laser light source;
the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
8. The 3D contour camera ambient backlight elimination method of claim 7, wherein: and the data processing unit is used for processing the data of the same column output by the image sensor array and selecting the maximum value as the dark noise of the column.
9. The 3D contour camera ambient backlight elimination method of claim 7, wherein: and the data processing unit is used for processing the data of the same column output by the image sensor array, and selecting the average value of the data of the column as the dark noise of the column.
10. A3D contour camera environment backlight elimination method is disclosed, the 3D contour camera comprises a laser light source, an image sensor array and a data processing unit, and the method is characterized by comprising the following steps:
judging whether the preset time is reached;
if yes, turning off the laser light source;
the image sensor array collects images, the data processing unit processes data output by the image sensor array to form a dark noise table, and in the subsequent operation process, the data processing unit processes the data output by the image sensor array by using the dark noise table to eliminate the influence generated by the ambient backlight.
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| JP2003000537A (en) * | 2001-06-27 | 2003-01-07 | Fuji Photo Film Co Ltd | Imaging method and apparatus for endoscope |
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| CN102332167A (en) * | 2011-10-09 | 2012-01-25 | 江苏大学 | Target detection method for vehicles and pedestrians in intelligent traffic monitoring |
| CN102572496A (en) * | 2011-12-30 | 2012-07-11 | 四川长虹电器股份有限公司 | Ghost image elimination method for shutter type three-dimensional (3D) liquid crystal television |
| CN205112410U (en) * | 2015-10-12 | 2016-03-30 | 黎世彬 | 3D laser printer's light source adjusting device |
| CN110108689A (en) * | 2019-05-17 | 2019-08-09 | 广西科技大学 | Quickly eliminate the method for 3D autofluorescent background noise |
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