CN109815758A - A kind of characteristics of image acquisition method based on two dimensional code - Google Patents
A kind of characteristics of image acquisition method based on two dimensional code Download PDFInfo
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- CN109815758A CN109815758A CN201910043519.0A CN201910043519A CN109815758A CN 109815758 A CN109815758 A CN 109815758A CN 201910043519 A CN201910043519 A CN 201910043519A CN 109815758 A CN109815758 A CN 109815758A
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Abstract
The present invention provides a kind of characteristics of image acquisition method based on two dimensional code, comprise the steps of: the two dimensional code that specific physics size Da is placed in the scene for needing to acquire characteristics of image, and write down all regions for wanting acquisition characteristics physics size Ds and and relative to two dimensional code distance R；Image Acquisition is carried out to scene using image collecting device, guarantees that the image being collected includes two dimensional code and all wants acquisition characteristics region；Two dimensional code in identification acquisition image, obtains the coordinate (Xci, Yci) of three angle points C1, C2, C3 under virtual coordinate system in image；Use the coordinate (Xci of C1, C2, C3, Yci), and the size Da for the two dimensional code write down in the first step, the physics size Ds in all regions for wanting acquisition characteristics, the physical distance R relative to two dimensional code, all pickup area A1, A2 is wanted calculate ... the image coordinate (XAi, YAi) and size under the virtual coordinate system of An.The present invention does not need the position to image, shooting angle, background colour etc. and is required, wide adaptability.
Description
Technical field
The present invention relates to field of image processing is related to, more particularly to the image data collection system based on two dimensional code
And method.
Background technique
Two dimensional code is also known as QRCode, QR full name QuickResponse, is one all the fashion in mobile device in recent years
A kind of coding mode, it can deposit more information than traditional BarCode bar code, can also indicate more contents.
In many application scenarios, the characteristics of image of some specific position in scene is acquired after needing to take pictures to scene, is led to
Often we can fix the position of image collecting device, angle, while after controlling background, environment light etc. factor, carry out image
Acquisition makes the characteristics of image to be acquired always occur from some fixation position of image.
Since this method needs fixed image collecting device, if to be acquired for the identical scene of multiple contents
And when comparing, needs to expend huge manpower and material resources and come to image collecting device in the identical scene of the multiple contents of guarantee
Position is identical, both uneconomical or not flexible.
Summary of the invention
In order to solve the problems in the existing technology, present invention thus provides a kind of characteristics of image based on two dimensional code
Acquisition method, it is characterised in that comprise the steps of:
The two dimensional code of specific physics size Da is placed in the scene for needing to acquire characteristics of image, and is write down and all to be acquired
The physics size Ds in the region of feature and and relative to two dimensional code distance R；
Image Acquisition is carried out to scene using image collecting device, guarantees that the image being collected includes two dimensional code and all wants
Acquisition characteristics region；
Remember image in two dimensional code three angle points be C1, C2, C3, remember image in it is all want pickup area be A1, A2 ... An；
Identification acquisition image in two dimensional code, obtain three angle points C1, C2, C3 under virtual coordinate system in image coordinate (Xci,
Yci)；
Use the big of the two dimensional code write down in the coordinate (Xci, Yci) and the first step of described three angle points C1, C2, C3
Small Da, the physics size Ds in all regions for wanting acquisition characteristics, the physical distance R relative to two dimensional code, calculating all will adopt
Collect the image coordinate (XAi, YAi) and size under the virtual coordinate system of region A1, A2 ... An.
Also comprise the steps of: according under the virtual coordinate system image coordinate (XAi, YAi) and size cut out
The correspondence image region of A1 ... A2 ... An, is normalized area size and direction of rotation；Zoning A1, A2 ... An normalizing
The RGB color histogram of image after change saves the result of calculating as the feature in the region.
The invention has the benefit that the present invention calculates some certain bits using the coordinate of three angle points of two dimensional code
The position for the image set, to be acquired to the image information, without the position to the image, shooting angle, background
Color etc. is required, wide adaptability.
Detailed description of the invention
When considered in conjunction with the accompanying drawings, can be good at understanding that structure of the invention, principle, work are special with reference to following description
Point and advantage, but attached drawing described herein as is used to that of the invention is explained further, and accompanying schematic figure is intended merely to preferably right
The present invention is illustrated, and does not constitute improper restriction to the present invention, in which:
Fig. 1 for two dimensional code of the present invention and the image to be acquired schematic diagram.
Specific embodiment
Below with reference to example and attached drawing, the invention will be further described, it is noted that following embodiment is only
Be it is schematical, be not intended to limitation the present invention.
With reference to Fig. 1, the purpose of the present invention is what is be achieved through the following technical solutions, a kind of characteristics of image based on two dimensional code
Acquisition method comprising the following steps:
S1. the two dimensional code of specific physics size Da is placed in the scene for needing to acquire characteristics of image, and writes down all want
The physics size Ds in the region of acquisition characteristics and and relative to two dimensional code distance R.
S2. Image Acquisition is carried out to scene using image collecting device, guarantees that the image being collected includes two dimensional code and institute
Want acquisition characteristics region.Without to image collecting device position and angle be fixed.
S3. by taking any one picture being collected as an example, remember that three angle points of two dimensional code in image are C1, C2, C3, note figure
It is all as in want pickup area for A1, A2 ... An.
S4. the two dimensional code in identification acquisition image, obtains the coordinate (Xci, Yci) of C1, C2, C3 in image.The coordinate is
Coordinate under virtual coordinate system.
S5. using the two dimensional code write down in the coordinate (Xci, Yci) and the first step of previous step calculated C1, C2, C3
Size Da, all regions for wanting acquisition characteristics physics size Ds, the physical distance R relative to two dimensional code, calculate all
The image coordinate (XAi, YAi) and size under the virtual coordinate system for the An that wants pickup area A1, A2 ....
S6. the correspondence image of A2 ... An that the image coordinate (XAi, YAi) and size calculated according to previous step cuts out A1 ...
Area size and direction of rotation is normalized in region.
The RGB color histogram of image after the zoning S7 A1 ... A2 ... An normalization, the feature as the region.It protects
Deposit the result of calculating.
Although having been combined embodiment to be described in detail the present invention, it should be understood by those skilled in the art that
Ground is that the present invention is not limited only to specific embodiment, on the contrary, becoming in the various amendments without departing from the application spirit and essence
Shape and replacement are all fallen among the protection scope of the application.
Claims (2)
1. a kind of characteristics of image acquisition method based on two dimensional code, it is characterised in that comprise the steps of:
The two dimensional code of specific physics size Da is placed in the scene for needing to acquire characteristics of image, and is write down and all wanted acquisition characteristics
Region physics size Ds and and relative to two dimensional code distance R；
Image Acquisition is carried out to scene using image collecting device, guarantees that the image being collected includes two dimensional code and all to acquire
Characteristic area；
Remember image in two dimensional code three angle points be C1, C2, C3, remember image in it is all want pickup area be A1, A2 ... An；Identification
The two dimensional code in image is acquired, the coordinate (Xci, Yci) of three angle points C1, C2, C3 under virtual coordinate system in image are obtained；
Using the size Da for the two dimensional code write down in the coordinate (Xci, Yci) and the first step of described three angle points C1, C2, C3,
Physics size Ds, the physical distance R relative to two dimensional code in all regions for wanting acquisition characteristics are calculated and all are wanted pickup area
The image coordinate (XAi, YAi) and size under the virtual coordinate system of A1, A2 ... An.
2. a kind of characteristics of image acquisition method based on two dimensional code according to claim 1, it is characterised in that comprising following
Step: according under the virtual coordinate system image coordinate (XAi, YAi) and size cut out A1 ... the correspondence image of A2 ... An
Area size and direction of rotation is normalized in region；The RGB color of image after zoning A1, A2 ... An normalization
Histogram saves the result of calculating as the feature in the region.
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| CN201910043519.0A CN109815758A (en) | 2019-01-17 | 2019-01-17 | A kind of characteristics of image acquisition method based on two dimensional code |
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| CN201910043519.0A CN109815758A (en) | 2019-01-17 | 2019-01-17 | A kind of characteristics of image acquisition method based on two dimensional code |
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