CN220795077U - Device for detecting dust on lens by using adjustable light ring - Google Patents
Device for detecting dust on lens by using adjustable light ring Download PDFInfo
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- CN220795077U CN220795077U CN202322351871.5U CN202322351871U CN220795077U CN 220795077 U CN220795077 U CN 220795077U CN 202322351871 U CN202322351871 U CN 202322351871U CN 220795077 U CN220795077 U CN 220795077U
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- lens
- camera
- dust
- image
- whiteboard
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- 239000000428 dust Substances 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000003384 imaging method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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Abstract
The utility model discloses a device for detecting dust on a lens by using an adjustable light ring, which comprises a computer, a camera and a whiteboard; the camera is provided with an adjustable ring lens, and the computer is connected with the camera through a data line so as to acquire an image of the whiteboard shot by the camera; the computer is used for analyzing the image and acquiring the dust condition of the lens. The method comprises the steps of shooting a whiteboard by using a gray-scale camera, and processing the shot image to analyze and acquire the condition of lens dust. The dust detection device is simple in structure, convenient to use and convenient to operate, dust detection is carried out on the lens in a non-contact mode, excessive cleaning of the lens is prevented, and abrasion to the lens is reduced; the lens is beneficial to cleaning and maintenance of the lens, imaging quality and image shooting efficiency are effectively provided, and the lens has strong practicability and wide applicability.
Description
Technical Field
The utility model relates to a lens dust detection device, in particular to a lens dust detection device by using an adjustable light ring, and belongs to the technical field of lens dust detection.
Background
When the camera is used for data acquisition, the experimental result can be greatly influenced by the quality of the image, and in the image acquisition process, certain noise can be introduced by dust on the lens, so that the quality of the acquired image is influenced.
And part of dust is invisible to naked eyes or is not easy to find and clean, so that the dust needs to be found and cleaned in time to avoid influencing imaging effect.
Therefore, there is a need for a device that can detect dust from a lens to clean the dust immediately prior to imaging.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model aims to provide a device for detecting dust of a lens by using an adjustable light ring.
In order to achieve the above object, the present utility model adopts the following technical scheme:
a device for detecting dust on a lens by using an adjustable light ring comprises a computer, a camera and a whiteboard;
the camera is provided with an adjustable aperture lens,
the computer is connected with the camera through a data line so as to acquire the image of the whiteboard shot by the camera;
the computer is used for analyzing the image and acquiring the dust condition of the lens.
The camera is a gray scale camera.
The resolution of the camera is 1920 (horizontal direction) by 1200 (vertical direction).
The camera and the white board are respectively fixed through the base and the board seat, and the white board fills the whole view field of the camera.
The focal length of the adjustable optical ring lens is 35mm.
The gray value of the captured image of the whiteboard is between 75-125.
The computer is used for calculating a binary segmentation threshold value of the image, and binarizing the image by using the calculated segmentation threshold value;
different connected domains are marked through the binarized image, and dust detection is carried out according to the number of pixels contained in each connected domain.
The utility model has the advantages that:
according to the device for detecting the dust of the lens by using the adjustable light ring, the whiteboard is shot by using the gray-scale camera, and the shot image is processed to analyze and acquire the dust condition of the lens. The dust detection device is simple in structure, convenient to use and convenient to operate, dust detection is carried out on the lens in a non-contact mode, excessive cleaning of the lens is prevented, and abrasion to the lens is reduced; the lens is beneficial to cleaning and maintenance of the lens, imaging quality and image shooting efficiency are effectively provided, and the lens has strong practicability and wide applicability.
Drawings
Fig. 1 is a schematic diagram of a device for detecting dust in a lens by using an adjustable optical ring.
The meaning of the symbols in the drawings is as follows: 1. computer 2, camera, 3, adjustable optical ring lens, 4, whiteboard, 5, frame, 6, board seat.
Detailed Description
The utility model is described in detail below with reference to the drawings and the specific embodiments.
A dust device for detecting lens by using an adjustable light ring comprises a computer, a camera and a whiteboard, wherein the camera is provided with the adjustable light ring lens.
In this embodiment, the camera adopts a Basler grayscale camera with a resolution of 1920 (horizontal direction) by 1200 (vertical direction), and the adjustable aperture lens adopts a computer lens with a focal length of 35mm.
The camera and the whiteboard are respectively fixed by the base and the board seat, namely the whiteboard is arranged right in front of the camera, so that the whiteboard fills the whole view field of the camera. The camera is connected with the computer through a data line.
The testing method comprises the following steps:
s1, adjusting an aperture to enable a gray value of a whiteboard image acquired by a camera to be between 75 and 125, and adjusting a focal length of a lens to focus;
s2, controlling a camera to shoot the whiteboard by a computer, and acquiring an image shot by the camera;
s3, calculating a segmentation threshold value of the shot image by using an Otsu method by using a computer, binarizing the image by using the calculated segmentation threshold value, and clustering the binary image by using a connected domain labeling method (connected components anavsis), namely processing the label of the binary image as 1 (255 pixel value) according to a certain connection rule, wherein adjacent pixels are endowed with the same label number, and non-adjacent pixels are endowed with different label numbers.
Specific: the gray value of the pixel point larger than the threshold value is assigned to be 1, otherwise, the gray value of the pixel point larger than the threshold value is assigned to be 0;
calculating the number of connected domains of the binarized image, and traversing all pixel points of the binarized image:
if the current pixel value is 1, the following operations are performed:
if the pixel is not marked, creating a new mark and assigning it to the current pixel;
if the pixel has been marked, it is combined with the marking of the neighboring pixel.
Repeating the steps until all pixels are traversed.
After the steps are finished, all pixel blocks with the same mark form a connected domain, namely, all connected domains in the image are distinguished by a connected domain label method;
then, counting the number of pixels with gray values not being 0 for each connected domain in the image, detecting dust according to the number of pixels contained in the connected domain, and marking the connected domain with the number of pixels smaller than 500 as dust.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the utility model in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the utility model.
Claims (7)
1. The device for detecting the dust of the lens by using the adjustable light ring is characterized by comprising a computer, a camera and a whiteboard;
the camera is provided with an adjustable aperture lens,
the computer is connected with the camera through a data line so as to acquire the image of the whiteboard shot by the camera;
the computer is used for analyzing the image and acquiring the dust condition of the lens.
2. The apparatus of claim 1, wherein the camera is a gray scale camera.
3. The apparatus of claim 1, wherein the resolution of the camera is 1920 x 1200.
4. A device for detecting lens dust using an adjustable optical ring as defined in claim 1, wherein the camera and the whiteboard are fixed by the base and the board respectively, the whiteboard filling the entire field of view of the camera.
5. A device for detecting lens dust using an adjustable optical ring as claimed in claim 1, wherein the focal length of the adjustable optical ring lens is 35mm.
6. A device for detecting lens dust using an adjustable aperture as defined in claim 1, wherein the gray scale value of the captured image of the whiteboard is between 75-125.
7. The device for detecting dust in a lens using an adjustable aperture as claimed in claim 1, wherein the computer is configured to calculate a segmentation threshold of the image, binarize the image using the calculated segmentation threshold, and assign a gray value of a pixel point larger than the threshold to 1, and otherwise assign a gray value to 0;
different connected domains are marked through the binarized image, and dust detection is carried out according to the number of pixels contained in each connected domain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322351871.5U CN220795077U (en) | 2023-08-31 | 2023-08-31 | Device for detecting dust on lens by using adjustable light ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322351871.5U CN220795077U (en) | 2023-08-31 | 2023-08-31 | Device for detecting dust on lens by using adjustable light ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220795077U true CN220795077U (en) | 2024-04-16 |
Family
ID=90658219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322351871.5U Active CN220795077U (en) | 2023-08-31 | 2023-08-31 | Device for detecting dust on lens by using adjustable light ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220795077U (en) |
-
2023
- 2023-08-31 CN CN202322351871.5U patent/CN220795077U/en active Active
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