CN109033970A - A kind of weed identification image irradiation compensation method based on three-dimensional colour atla - Google Patents
A kind of weed identification image irradiation compensation method based on three-dimensional colour atla Download PDFInfo
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- CN109033970A CN109033970A CN201810672346.4A CN201810672346A CN109033970A CN 109033970 A CN109033970 A CN 109033970A CN 201810672346 A CN201810672346 A CN 201810672346A CN 109033970 A CN109033970 A CN 109033970A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/10—Terrestrial scenes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/40—Extraction of image or video features
- G06V10/56—Extraction of image or video features relating to colour
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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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Abstract
The weed identification image irradiation compensation method based on three-dimensional colour atla that the invention discloses a kind of, it is demarcated in laboratory, image irradiation compensation system is subjected to Image Acquisition to bulky color card indoors, obtain the RGB image of three-dimensional colour atla, and gray level image is converted to, obtain the gray value of each pixel；The first video camera above outdoor, three-dimensional colour atla carries out Image Acquisition to bulky color card, obtains RGB image 1, while second video camera in front carries out Image Acquisition to field crops, obtains RGB image 2；Gradation conversion is carried out to image 1, the gray value of each pixel is obtained, is compared with the gray value of each pixel of indoor acquisition image and compensate calculating, obtain mapping relations formula；Field crops image 2 is corrected with obtained mapping relations formula, obtains the field crops image under simulation indoor situations.The beneficial effects of the invention are as follows the precision that can be improved weed identification.
Description
Technical field
The invention belongs to technical field of image processing, are related to a kind of weed identification image irradiation compensation based on three-dimensional colour atla
Method.
Background technique
Present invention is mainly applied to the image acquisition process that weeds in field identifies in real time.Due to not knowing for weather condition
Property, in the case where sunlight is strong or the apparent situation of illumination variations such as rainy days, the field crops image of shooting cannot be applied directly
In later image processing, to affect the precision of weed identification.
Summary of the invention
The weed identification image irradiation compensation method based on three-dimensional colour atla that the purpose of the present invention is to provide a kind of, the present invention
Beneficial effect be that the precision of weed identification can be improved in the apparent situation of illumination variations such as or rainy days strong in sunlight.
The technical scheme adopted by the invention is that following the steps below:
1, it is demarcated in laboratory, image irradiation compensation system is subjected to Image Acquisition to bulky color card indoors,
The RGB image of three-dimensional colour atla is obtained, and is converted to gray level image, obtains the gray value of each pixel；
2, the first video camera above outdoor, three-dimensional colour atla carries out Image Acquisition to bulky color card, obtains RGB image 1,
Second video camera in front carries out Image Acquisition to field crops simultaneously, obtains RGB image 2；
3, gradation conversion is carried out to image 1, obtains the gray value of each pixel, each pixel with indoor acquisition image
The gray value of point, which compares, compensates calculating, obtains mapping relations formula；
4, field crops image 2 is corrected with obtained mapping relations formula, the field obtained under simulation indoor situations is made
Object image.
Further, after compensation each pixel of sum of the grayscale values off-the-air picture of each pixel of image 1 gray value error
No more than 5%.
Further, when the progress Image Acquisition to bulky color card, position for video camera is above three-dimensional colour atla.
Further, it is located in front of field crops when the second video camera carries out Image Acquisition to field crops.
Further, the various colors on three-dimensional colour atla is equipped with several protrusions with striped arrangement, three-dimensional colour atla color face.It is selected
Color is the common colors such as field crops, weeds, soil, and three-dimensional colour atla color face is equipped with several protrusions, in order to simulate crop, miscellaneous
The common posture of blade of grass, such as level in ground, leaf in ground angle be 30 degree, 45 degree, 60 degree, may compared with Astilbo idestabularis (Hemsl.) Engler
There is certain radian, is simulated in colour atla with circular arc.
Detailed description of the invention
Fig. 1 is the weed identification image irradiation compensation method schematic diagram the present invention is based on three-dimensional colour atla；
Fig. 2 is three-dimensional colour atla schematic diagram.
In figure, 1. three-dimensional colour atlas, 2. first video cameras, 3. second video cameras, 4. field crops.
Specific embodiment
The present invention is described in detail With reference to embodiment.
Image irradiation compensation system designed by the present invention is as shown in Figure 1, mainly by two video cameras and a bulky color
Card is constituted.Steps are as follows:
1) it is demarcated in laboratory, image irradiation compensation system is subjected to Image Acquisition to bulky color card 1 indoors,
The RGB image of three-dimensional colour atla 1 is obtained, and is converted to gray level image, obtains the gray value of each pixel.
2) in outdoor, the first video camera 2 of three-dimensional 1 top of colour atla carries out Image Acquisition to bulky color card 1, obtains RGB figure
As 1, while second video camera 3 in front carries out Image Acquisition to field crops 4, obtains RGB image 2.
3) gradation conversion is carried out to image 1, obtains the gray value of each pixel, with the gray value of indoor acquisition image into
Row comparison compensates calculating, obtains mapping relations formula, the sum of the grayscale values off-the-air picture of each pixel of image 1 is each after compensation
The gray value error of pixel is no more than 5%.
4) image 2 is corrected with obtained mapping relations formula, obtains the field crops image under simulation indoor situations.
The present invention can overcome influence of the ambient lighting to real time image collection, and then improve crop weeds online recognition essence
Degree.For colour atla as shown in Fig. 2, colour atla color category is determined for field actual conditions, multiple angles are to simulate the appearance of crop leaf
State.
The above is only not to make limit in any form to the present invention to better embodiment of the invention
System, any simple modification that embodiment of above is made according to the technical essence of the invention, equivalent variations and modification,
Belong in the range of technical solution of the present invention.
Claims (5)
1. a kind of weed identification image irradiation compensation method based on three-dimensional colour atla, it is characterised in that follow the steps below:
1) it is demarcated in laboratory first, Image Acquisition is carried out to bulky color card indoors, obtain the RGB figure of three-dimensional colour atla
Picture, and the RGB image of three-dimensional colour atla is converted into gray level image, obtain the gray value of each pixel of off-the-air picture；
2) in outdoor, the first video camera carries out Image Acquisition to bulky color card, obtains RGB image 1, while the second video camera is to field
Interrow crop carries out Image Acquisition, obtains RGB image 2；
3) gradation conversion is carried out to image 1, obtains the gray value of each pixel in image, it is each with off-the-air picture in step 1)
The gray value of pixel, which compares, compensates calculating, obtains mapping relations formula；
4) field crops image 2 is corrected with obtained mapping relations formula, obtains the field crops figure under simulation indoor situations
Picture.
2. according to a kind of weed identification image irradiation compensation method based on three-dimensional colour atla described in claim 1, it is characterised in that:
The gray value error of each pixel of sum of the grayscale values off-the-air picture of each pixel of image 1 is no more than 5% after the compensation.
3. according to a kind of weed identification image irradiation compensation method based on three-dimensional colour atla described in claim 1, it is characterised in that:
When the progress Image Acquisition to bulky color card, position for video camera is above three-dimensional colour atla.
4. according to a kind of weed identification image irradiation compensation method based on three-dimensional colour atla described in claim 1, it is characterised in that:
Second video camera is located in front of field crops when carrying out Image Acquisition to field crops.
5. according to a kind of weed identification image irradiation compensation method based on three-dimensional colour atla described in claim 1, it is characterised in that:
For various colors on the solid colour atla with striped arrangement, three-dimensional colour atla color face is equipped with several protrusions, and selected color is field
The common colors such as crop, weeds, soil, three-dimensional colour atla color face is equipped with several protrusions, common in order to simulate crop, weeds leaf
Posture, it is such as horizontal in ground, leaf in ground angle be 30 degree, 45 degree, 60 degree, certain radian, color are had compared with Astilbo idestabularis (Hemsl.) Engler
It is simulated in card with circular arc.
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| CN201810672346.4A CN109033970A (en) | 2018-06-26 | 2018-06-26 | A kind of weed identification image irradiation compensation method based on three-dimensional colour atla |
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| CN201810672346.4A CN109033970A (en) | 2018-06-26 | 2018-06-26 | A kind of weed identification image irradiation compensation method based on three-dimensional colour atla |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110264564A (en) * | 2019-05-24 | 2019-09-20 | 河北科技大学 | A kind of video display style emulation mode based on colour atla mapping and Histogram Mapping |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096910A (en) * | 2015-07-09 | 2015-11-25 | 西安诺瓦电子科技有限公司 | Image processing method |
| CN106127675A (en) * | 2016-06-20 | 2016-11-16 | 深圳市中识创新科技有限公司 | Colour consistency method and apparatus |
| CN106296696A (en) * | 2016-08-12 | 2017-01-04 | 深圳市中识创新科技有限公司 | The conforming processing method of color of image and image capture device |
-
2018
- 2018-06-26 CN CN201810672346.4A patent/CN109033970A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096910A (en) * | 2015-07-09 | 2015-11-25 | 西安诺瓦电子科技有限公司 | Image processing method |
| CN106127675A (en) * | 2016-06-20 | 2016-11-16 | 深圳市中识创新科技有限公司 | Colour consistency method and apparatus |
| CN106296696A (en) * | 2016-08-12 | 2017-01-04 | 深圳市中识创新科技有限公司 | The conforming processing method of color of image and image capture device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110264564A (en) * | 2019-05-24 | 2019-09-20 | 河北科技大学 | A kind of video display style emulation mode based on colour atla mapping and Histogram Mapping |
| CN110264564B (en) * | 2019-05-24 | 2022-12-06 | 河北科技大学 | Film and television style simulation method based on color chart mapping and histogram mapping |
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Application publication date: 20181218 |
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