WO2019024610A1

WO2019024610A1 - Image recognition method, apparatus, computer device, and readable storage medium

Info

Publication number: WO2019024610A1
Application number: PCT/CN2018/090970
Authority: WO
Inventors: 郭浒生
Original assignee: 合肥美的智能科技有限公司
Priority date: 2017-08-04
Filing date: 2018-06-13
Publication date: 2019-02-07
Also published as: CN107480711B; CN107480711A

Abstract

An image recognition method, apparatus, computer device, and a readable storage medium, the image recognition method comprising: determining a shape characteristic of an image to be recognized (S102); extracting texture characteristics and color characteristics of the image to be recognized (S104); according to an image characteristic weight table in a first preset image library, determining the weights of each texture characteristic and the weights of each color characteristic of the image to be recognized (S106); screening texture characteristics and color characteristics having weights that are greater than a preset weight so as to form a texture characteristic set and a color characteristic set respectively (S108); according to the shape characteristic, the texture characteristic set, and the color characteristic set, determining a first evolution image corresponding to the image to be recognized (S110); comparing a degree of matching between the first evolution image and any image in a second preset image library, and determining a matching image for the image to be recognized (S112). The present method increases accuracy in image recognition, reduces the number of sample images, and saves hardware resources.

Description

Image recognition method, device, computer device and readable storage medium

The present application claims the priority of the Chinese Patent Application entitled "Image Recognition Method, Apparatus, Computer Equipment, and Readable Storage Medium" by the Chinese Patent Office, the application number is 201710661653.8, which is filed on August 4, 2017. The citations are incorporated herein by reference.

Technical field

The present invention relates to the field of image recognition technology, and in particular to an image recognition method, an image recognition device, a computer device, and a computer readable storage medium.

Background technique

In the related art, image recognition of food materials is generally implemented based on a neural network model for machine training learning to mark a large number of sample food images, and the following technical defects exist:

(1) Identifying the same food material According to the placement position, food composition, and food occlusion, a large number of sample food images are marked. The number of sample food images is too large, the machine training is difficult, and the image recognition accuracy is low.

(2) Machine training requires a lot of hardware resources and costs are high.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

Accordingly, it is an object of the present invention to provide an image recognition method.

Another object of the present invention is to provide an image recognition apparatus.

It is still another object of the present invention to provide a computer device.

It is still another object of the present invention to provide a computer readable storage medium.

In order to achieve the above object, the technical solution of the first aspect of the present invention provides an image recognition method, including: determining a shape feature of an image to be recognized; extracting a texture feature and a color feature of the image to be recognized; according to the first preset image library The image feature weight table, determining the weight of each texture feature of the image to be identified and the weight of each color feature; the filtering weight is greater than the texture feature and the color feature of the preset weight to form the texture feature set and the color feature set respectively; Determining, according to the shape feature, the texture feature set and the color feature set, a first evolution image corresponding to the image to be identified; comparing a matching degree of the first evolution image with any one of the second preset image library, and determining a matching image of the image to be recognized .

In the technical solution, by determining the shape feature of the image to be recognized, extracting the texture feature and the color feature of the image to be recognized, the feature of the image to be recognized is extracted, by using the image feature weight table in the first preset image library. Determining the weight of each texture feature of the image to be identified and the weight of each color feature, and then filtering the texture features and color features that are greater than the preset weights to form the texture feature set and the color feature set respectively, further optimizing the waiting for Identifying the features extracted from the image is beneficial to improve the recognition accuracy of the image to be recognized. The first evolution image corresponding to the image to be identified is determined according to the shape feature, the texture feature set and the color feature set, and the image to be recognized is further optimized. It is beneficial to improve the recognition accuracy of the image to be recognized, and the main image feature of the image to be recognized is highlighted in the first evolution image, which is beneficial to reduce the matching difficulty by comparing any image in the first evolution image and the second preset image library. Matching degree, determine the matching image of the image to be identified, and realize The recognition of the image to be recognized improves the accuracy of the image recognition, and the number of sample images in the second preset image library only needs to include a small number of sample images containing the main image features to realize the recognition of the image to be recognized, and the sample image is reduced. The number saves hardware resources and reduces the difficulty of machine training.

Specifically, taking the food material as an example, the area suggestion frame is divided by the area suggestion network, and the image in the area suggestion frame is the image to be recognized, and the image to be recognized includes the image of the food material and the background image of the position, and is other The image of the object is occluded, and the method of the present invention can screen the image features of the food material, and then obtain the first evolution image, so that the image of the sample material in the second preset image library can be matched, and then the matching degree is compared. To achieve image recognition of the image to be recognized.

Wherein, the preset weight is 0.4, the first preset image library is a user's preference library, and the image feature weight table in the first preset image library is based on any image feature in the first preset image library in all image features. The weight of the image to be identified is determined by the gray level co-occurrence matrix algorithm, and the color feature of the image to be recognized can be extracted by a histogram algorithm.

The specific process of texture feature extraction of the image to be identified is as follows:

Suppose the size of the image to be identified is M×N, the gray level is L, G={0, 1, 2, ..., L-1}, and f(x, y) is the gray of the pixel at the coordinates (x, y). Degree level, a co-occurrence matrix of each image is an L × L matrix T[t _ij ] _{L × L} , the elements in T are the spatial relationship of the gray level of the image,

Extracted texture features p _ij ,

The specific process of extracting the color features of the image to be identified is as follows:

Extract the color features H(k), H(k)=nk/N, (k=0,1,...,L-1), where k is the pixel feature value of the image, and L is the pixel feature of the image. The number of values, nk is the number of pixels in the image with a pixel feature value of k, and N is the total number of image pixels.

In the above technical solution, preferably, determining a shape feature of the image to be identified includes: extracting a corner feature of the image to be recognized; calculating a matching degree of the corner feature with any shape in the preset shape library to determine a maximum matching degree. Determining whether the maximum matching degree is greater than the first preset matching degree threshold; if it is determined that the maximum matching degree is greater than the first preset matching degree threshold, determining that the shape corresponding to the maximum matching degree is the shape feature of the image to be identified; if determining the maximum matching degree If it is not greater than the first preset matching degree threshold, the corner feature of the image to be recognized is continuously extracted.

In the technical solution, the maximum matching degree is determined by extracting the corner feature of the image to be recognized, and calculating the matching degree of the corner feature with any shape in the preset shape library, and then the maximum matching degree is greater than the first preset matching. When the threshold is determined, the shape corresponding to the maximum matching degree is determined as the shape feature of the image to be recognized, the shape feature of the image to be recognized is determined, and the accuracy of the shape feature is determined, which is beneficial to further improve the accuracy of image recognition. .

The first preset matching degree threshold is 0.5-0.8, and the corner feature extraction of the image to be identified can be implemented by a Harris corner feature extraction algorithm.

The specific process of corner feature extraction of the image to be identified is as follows:

Define a 2×2 Harris matrix,

Where C _x and C _y are the first derivative of the intensity information of the point x=(x, y) in the x and y directions, respectively, and ω(x, y) is the weight of the corresponding position, by calculating the corner point of the Harris matrix The response value D is used to determine whether it is a corner feature, D=det Am(traceA) ² =(ac-b) ² -m(a+c) ² , where det and trace are determinant and trace operators, m It is a constant with a value of 0.04-0.06. When the corner response value D is greater than the set threshold and is the local maximum in the neighborhood of the point, the point is extracted as a corner feature.

In any one of the foregoing technical solutions, preferably, determining, according to the shape feature, the texture feature set, and the color feature set, the first evolution image corresponding to the image to be identified, including: constructing a shape space according to the shape feature; randomly selecting the texture feature set The color features in the texture feature and the color feature set are respectively set in the shape space to form a second evolution image; determining whether the second evolution image satisfies the first preset condition; and if the second evolution image satisfies the first pre-determination Setting a condition, determining that the second evolution image is the first evolution image; if it is determined that the second evolution image does not satisfy the first preset condition, then re-selecting the texture feature in the texture feature set and the color feature in the color feature set are sequentially And being disposed in the shape space to form a new second evolution image, wherein the first preset condition is that the maximum matching degree between the second evolution image and the image in the second preset image library is not less than a second preset matching degree threshold And/or the number of judgments is not less than the first preset number of thresholds.

In the technical solution, the shape space is constructed according to the shape feature, and then the texture feature in the texture feature set and the color feature in the color feature set are randomly selected and sequentially set in the shape space to form a second evolution image, and the second evolution image is improved. The diversity of the evolved image is advantageous for improving the efficiency of image recognition, and is also beneficial for reducing the number of sample images, by judging whether the second evolved image satisfies the first preset condition, and when the second evolved image satisfies the first preset condition, Determining that the second evolution image is the first evolution image, and continuing to form a new second evolution image when the second evolution image does not satisfy the first preset condition, further reducing the first evolution image and the second preset image library The image matching difficulty increases the accuracy of the recognition of the image to be recognized.

The second preset matching degree threshold is 0.6-0.9, and the first preset number of thresholds is 8000-11000.

In any one of the foregoing technical solutions, preferably, determining, according to the shape feature, the texture feature set, and the color feature set, the first evolution image corresponding to the image to be identified, including: determining the shape feature, the texture feature set, and the color feature set to initialize a group; mutating, intersecting, and selecting operations are sequentially performed on the initialization group to form an evolutionary group; determining whether the evolutionary group satisfies a second predetermined condition; if the evolutionary group is determined to satisfy the second predetermined condition, determining an image corresponding to the evolved group as The first evolutionary image; if it is determined that the evolutionary group does not satisfy the second predetermined condition, the evolutionary group is used as an initialization group, and the mutation, intersection, and selection operations are sequentially performed, wherein the second preset condition is mutation, intersection, and selection operation. The number of times is not less than the second preset number threshold and/or the maximum matching degree of the image corresponding to the evolution group and the image in the preset image library is not less than the third preset matching degree threshold.

In the technical solution, by determining shape features, texture feature sets, and color feature sets as initialization groups, and then performing multiple mutations, intersections, and selection operations, multiple evolutions are performed to obtain a first evolution image, which further reduces The matching difficulty of the images in the two preset image libraries improves the accuracy of image recognition and improves the efficiency of image recognition.

The second preset number threshold is 8000-11000, and the third preset matching threshold is 0.6-0.9. The mutation, crossover, and selection operations can be implemented by a differential evolution algorithm.

Specifically, three samples are randomly selected from the initialization population, x _p1 , x _p2 , x _p3 , and the mutation operation v _ij (t+1)=x _p1j (t)+η(x _p2j (t)‐x _p3j (t )) where x _p2j (t)‐x _p3j (t) is the differentiation vector, η is the scaling factor, cross operation

Where randl _ij is a random fraction between [0,1], CR is the crossover probability, CR∈[0,1], rand(i) is a random integer between [1,n], this intersection The strategy of operation can ensure that x _i (t+1) has at least one quantity contributed by the corresponding component of x _i (t), the selection operation,

In any one of the above aspects, preferably, after comparing the matching degree of any one of the first evolution image and the second preset image library to determine the matching image of the image to be identified, the method further includes: adding the matching image to the first A preset image library and update the image feature weight table.

In the technical solution, by adding the matching image to the first preset image library and updating the image feature weight table, the association between the image feature weight table and the user's preference is realized, and the image to be identified is filtered according to the user's preference. The realization of the image features further improves the accuracy of image recognition of the image to be recognized.

The technical solution of the second aspect of the present invention provides an image recognition apparatus, including: a determining unit, configured to determine a shape feature of an image to be recognized; an extracting unit, configured to extract a texture feature and a color feature of the image to be identified; The method is further configured to: determine, according to an image feature weight table in the first preset image library, a weight of each texture feature of the image to be identified and a weight of each color feature; and a screening unit, configured to filter a texture whose weight is greater than a preset weight a feature and a color feature to respectively form a texture feature set and a color feature set; the determining unit is further configured to: determine a first evolution image corresponding to the image to be identified according to the shape feature, the texture feature set, and the color feature set; and the comparing unit is configured to: Comparing the matching degree of the first evolved image with any of the second preset image libraries to determine a matching image of the image to be recognized.

Extracted texture features p _ij ,

In the above technical solution, preferably, the extracting unit is further configured to: extract a corner feature of the image to be recognized; the image recognition device further includes: a calculating unit, configured to calculate a corner feature and any shape in the preset shape library Matching degree to determine a maximum matching degree; the first determining unit is configured to determine whether the maximum matching degree is greater than the first preset matching degree threshold; the determining unit is further configured to: determine, in the first determining unit, that the maximum matching degree is greater than the first preset When the matching degree threshold is determined, the shape corresponding to the maximum matching degree is determined as the shape feature of the image to be identified; the extracting unit is further configured to: when the first determining unit determines that the maximum matching degree is not greater than the first preset matching degree threshold, continue to extract the to-be-identified The corner feature of the image.

Define a 2×2 Harris matrix,

In any one of the above aspects, preferably, the method further includes: a building unit configured to construct a shape space according to the shape feature; and a selecting unit configured to randomly select the texture feature in the texture feature set and the color feature in the color feature set The second determining unit is configured to determine whether the second evolved image satisfies the first preset condition, and the determining unit is further configured to determine the second evolution in the second determining unit. When the image satisfies the first preset condition, determining that the second evolved image is the first evolved image; the selecting unit is further configured to: re-randomly select the texture feature when the second determining unit determines that the second evolved image does not satisfy the first preset condition The texture features in the collection and the color features in the color feature set are respectively disposed in the shape space to form a new second evolution image, wherein the first preset condition is in the second evolution image and the second preset image library. The maximum matching degree of the image is not less than the second preset matching degree threshold and/or the number of judgments is not less than the first preset number of times threshold.

In any one of the above aspects, preferably, the determining unit is further configured to: determine the shape feature, the texture feature set, and the color feature set as an initialization group; and the image recognition device further includes: an operation unit, configured to sequentially perform the initialization group The mutation, the intersection and the selection operation are performed to form an evolutionary group; the third determining unit is configured to determine whether the evolutionary group satisfies the second predetermined condition; and the determining unit is further configured to: when the evolutionary group satisfies the second predetermined condition, the evolutionary group is The corresponding image is determined as a first evolved image; the operation unit is further configured to: when the evolved group does not satisfy the second preset condition, use the evolved group as an initialization group, and continue to perform mutation, crossover, and selection operations, wherein the second pre- The condition that the number of the mutation, the intersection, and the selection operation is not less than the second preset number threshold and/or the maximum matching degree of the image corresponding to the evolution group and the image in the preset image library is not less than the third preset matching degree threshold.

In any of the above technical solutions, preferably, the method further includes: an updating unit, configured to add the matching image to the first preset image library, and update the image feature weight table.

The technical solution of the third aspect of the present invention provides a computer device including a processor for implementing any one of the technical solutions of the first aspect of the present invention when the processor is configured to execute a computer program stored in the memory. The steps of the image recognition method.

In the technical solution, the computer device includes a processor, and the processor is configured to implement the steps of the image recognition method according to any one of the technical solutions of the first aspect of the present invention when the computer program stored in the memory is executed, thereby having the above All the beneficial effects of the image recognition method according to any one of the technical solutions of the first aspect of the present invention are not described herein.

The technical solution of the fourth aspect of the present invention provides a computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements an image of any one of the technical solutions of the first aspect of the present invention The steps to identify the method.

In the technical solution, the computer readable storage medium has stored thereon a computer program, and when the computer program is executed by the processor, implements the steps of the image recognition method according to any one of the technical solutions of the first aspect of the present invention, and thus has All the beneficial effects of the image recognition method according to any one of the technical solutions of the first aspect of the present invention are not described herein.

The additional aspects and advantages of the invention will be set forth in the description which follows, and

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

FIG. 1 shows a schematic flow chart of an image recognition method according to an embodiment of the present invention; FIG.

Figure 2 shows a schematic block diagram of an image recognition apparatus in accordance with one embodiment of the present invention;

FIG. 3 shows a schematic flow chart of an image recognition method according to another embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a full understanding of the invention, but the invention may be practiced otherwise than as described herein. Limitations of the embodiments.

Example 1

FIG. 1 shows a schematic flow chart of an image recognition method in accordance with one embodiment of the present invention.

As shown in FIG. 1 , an image recognition method according to an embodiment of the present invention includes: step S102, determining a shape feature of an image to be recognized; and step S104, extracting a texture feature and a color feature of the image to be identified; and step S106, according to the first Determining an image feature weight table in the image library, determining a weight of each texture feature of the image to be recognized and a weight of each color feature; and in step S108, filtering the texture feature and the color feature that are greater than the preset weight to form a texture respectively a feature set and a color feature set; step S110, determining a first evolved image corresponding to the image to be recognized according to the shape feature, the texture feature set, and the color feature set; and step S112, comparing the first evolved image with the second preset image library The matching degree of an image determines the matching image of the image to be identified.

In this embodiment, by determining the shape feature of the image to be recognized, extracting the texture feature and the color feature of the image to be recognized, the feature of the image to be recognized is extracted, by using the image feature weight table in the first preset image library. Determining the weight of each texture feature of the image to be identified and the weight of each color feature, and then filtering the texture features and color features that are greater than the preset weights to form the texture feature set and the color feature set respectively, further optimizing the waiting for Identifying the features extracted from the image is beneficial to improve the recognition accuracy of the image to be recognized. The first evolution image corresponding to the image to be identified is determined according to the shape feature, the texture feature set and the color feature set, and the image to be recognized is further optimized. It is beneficial to improve the recognition accuracy of the image to be recognized, and the main image feature of the image to be recognized is highlighted in the first evolution image, which is beneficial to reduce the matching difficulty by comparing any image in the first evolution image and the second preset image library. The matching degree, the matching image of the image to be identified is determined, and the The recognition of the image to be recognized improves the accuracy of the image recognition, and the number of sample images in the second preset image library only needs to include a small number of sample images containing the main image features to realize the recognition of the image to be recognized, and the sample image is reduced. The number saves hardware resources and reduces the difficulty of machine training.

Extracted texture features p _ij ,

In the above embodiment, preferably, determining a shape feature of the image to be recognized includes: extracting a corner feature of the image to be recognized; calculating a matching degree of the corner feature with any shape in the preset shape library to determine a maximum matching degree. Determining whether the maximum matching degree is greater than the first preset matching degree threshold; if it is determined that the maximum matching degree is greater than the first preset matching degree threshold, determining that the shape corresponding to the maximum matching degree is the shape feature of the image to be identified; if determining the maximum matching degree If it is not greater than the first preset matching degree threshold, the corner feature of the image to be recognized is continuously extracted.

In this embodiment, the maximum matching degree is determined by extracting the corner feature of the image to be recognized, the matching degree of the corner feature with any shape in the preset shape library, and then the maximum matching degree is greater than the first preset matching. When the threshold is determined, the shape corresponding to the maximum matching degree is determined as the shape feature of the image to be recognized, the shape feature of the image to be recognized is determined, and the accuracy of the shape feature is determined, which is beneficial to further improve the accuracy of image recognition. .

Define a 2×2 Harris matrix,

Where C _x and C _y are the first derivative of the intensity information of the point x=(x, y) in the x and y directions, respectively, and ω (x, y) is the weight of the corresponding position, by calculating the corner point of the Harris matrix The response value D is used to determine whether it is a corner feature, D=det Am(traceA) ² =(ac-b) ² -m(a+c) ² , where det and trace are determinant and trace operators, m It is a constant with a value of 0.04-0.06. When the corner response value D is greater than the set threshold and is the local maximum in the neighborhood of the point, the point is extracted as a corner feature.

In any of the foregoing embodiments, preferably, determining, according to the shape feature, the texture feature set, and the color feature set, the first evolution image corresponding to the image to be identified, including: constructing a shape space according to the shape feature; randomly selecting the texture feature set The color features in the texture feature and the color feature set are respectively set in the shape space to form a second evolution image; determining whether the second evolution image satisfies the first preset condition; and if the second evolution image satisfies the first pre-determination Setting a condition, determining that the second evolution image is the first evolution image; if it is determined that the second evolution image does not satisfy the first preset condition, then re-selecting the texture feature in the texture feature set and the color feature in the color feature set are sequentially And being disposed in the shape space to form a new second evolution image, wherein the first preset condition is that the maximum matching degree between the second evolution image and the image in the second preset image library is not less than a second preset matching degree threshold And/or the number of judgments is not less than the first preset number of thresholds.

In this embodiment, the shape space is constructed according to the shape feature, and then the texture feature in the texture feature set and the color feature in the color feature set are randomly selected and sequentially set in the shape space to form a second evolution image, and the second evolution image is improved. The diversity of the evolved image is advantageous for improving the efficiency of image recognition, and is also beneficial for reducing the number of sample images, by judging whether the second evolved image satisfies the first preset condition, and when the second evolved image satisfies the first preset condition, Determining that the second evolution image is the first evolution image, and continuing to form a new second evolution image when the second evolution image does not satisfy the first preset condition, further reducing the first evolution image and the second preset image library The image matching difficulty increases the accuracy of the recognition of the image to be recognized.

In any of the foregoing embodiments, preferably, determining, according to the shape feature, the texture feature set, and the color feature set, the first evolution image corresponding to the image to be identified, including: determining the shape feature, the texture feature set, and the color feature set to be initialized a group; mutating, intersecting, and selecting operations are sequentially performed on the initialization group to form an evolutionary group; determining whether the evolutionary group satisfies a second predetermined condition; if the evolutionary group is determined to satisfy the second predetermined condition, determining an image corresponding to the evolved group as The first evolutionary image; if it is determined that the evolutionary group does not satisfy the second predetermined condition, the evolutionary group is used as an initialization group, and the mutation, intersection, and selection operations are sequentially performed, wherein the second preset condition is mutation, intersection, and selection operation. The number of times is not less than the second preset number threshold and/or the maximum matching degree of the image corresponding to the evolution group and the image in the preset image library is not less than the third preset matching degree threshold.

In this embodiment, by determining the shape feature, the texture feature set, and the color feature set as the initialization group, and then performing multiple mutations, intersections, and selection operations, multiple evolutions are performed to obtain the first evolution image, which further reduces the The matching difficulty of the images in the two preset image libraries improves the accuracy of image recognition and improves the efficiency of image recognition.

In any of the above embodiments, after comparing the matching degree of any one of the first evolution image and the second preset image library to determine the matching image of the image to be identified, the method further includes: adding the matching image to the first A preset image library and update the image feature weight table.

In this embodiment, by adding the matching image to the first preset image library and updating the image feature weight table, the association between the image feature weight table and the user's preference is realized, and the image to be identified is filtered according to the user's preference. The realization of the image features further improves the accuracy of image recognition of the image to be recognized.

Example 2

FIG. 2 shows a schematic block diagram of an image recognition device 200 in accordance with one embodiment of the present invention.

As shown in FIG. 2, an image recognition apparatus 200 according to an embodiment of the present invention includes: a determining unit 204, configured to determine a shape feature of an image to be recognized; and an extracting unit, configured to extract a texture feature and a color feature of the image to be recognized; The determining unit 204 is further configured to: determine, according to the image feature weight table in the first preset image library, the weight of each texture feature of the image to be identified and the weight of each color feature; the screening unit 206 is configured to use the screening weight to be greater than Determining the texture feature and the color feature to form the texture feature set and the color feature set respectively; the determining unit 204 is further configured to: determine the first evolution image corresponding to the image to be identified according to the shape feature, the texture feature set, and the color feature set; The comparing unit 208 is configured to compare the matching degree of any one of the first evolution image and the second preset image library to determine a matching image of the image to be identified.

Extracted texture features p _ij ,

In the above embodiment, preferably, the extracting unit is further configured to: extract a corner feature of the image to be recognized; the image recognition device 200 further includes: a calculating unit 210, configured to calculate any one of the corner feature and the preset shape library The matching degree of the shape to determine the maximum matching degree; the first determining unit 212 is configured to determine whether the maximum matching degree is greater than the first preset matching degree threshold; the determining unit 204 is further configured to: determine the maximum matching degree in the first determining unit 212 When the value is greater than the first preset matching degree threshold, the shape corresponding to the maximum matching degree is determined as the shape feature of the image to be identified; the extracting unit is further configured to: determine, in the first determining unit 212, that the maximum matching degree is not greater than the first preset matching degree threshold. At the same time, the corner feature of the image to be recognized is continuously extracted.

Define a 2×2 Harris matrix,

In any of the above embodiments, preferably, the method further includes: a construction unit 214, configured to construct a shape space according to the shape feature; and a selection unit 216, configured to randomly select the texture feature and the color feature set in the texture feature set The color features are respectively disposed in the shape space to form a second evolution image; the second determining unit 218 is configured to determine whether the second evolution image satisfies the first preset condition; the determining unit 204 is further configured to: in the second determining unit 218: determining that the second evolution image is the first evolution image when the second evolution image meets the first preset condition; the selecting unit 216 is further configured to: determine, by the second determining unit 218, that the second evolution image does not satisfy the first preset condition And re-randomly selecting the texture features in the texture feature set and the color features in the color feature set are respectively set in the shape space to form a new second evolution image, wherein the first preset condition is the second evolution image and The maximum matching degree of the image in the second preset image library is not less than the second preset matching degree threshold and/or the number of judgments is not less than the first preset number threshold value.

In any of the above embodiments, the determining unit 204 is further configured to: determine the shape feature, the texture feature set, and the color feature set as an initialization group; the image recognition apparatus 200 further includes: an operation unit 220, configured to perform initialization The group sequentially performs mutation, crossover, and selection operations to form an evolutionary group. The third determining unit 222 is configured to determine whether the evolved group satisfies the second preset condition. The determining unit 204 is further configured to: meet the second preset condition in the evolved group. The image corresponding to the evolutionary group is determined as the first evolution image; the operation unit 220 is further configured to: when the evolutionary group does not satisfy the second preset condition, use the evolutionary group as the initialization group, and continue to perform mutation, crossover, and selection operations in sequence. The second preset condition is that the number of the mutation, the intersection, and the selection operation is not less than the second preset number threshold and/or the maximum matching degree between the image corresponding to the evolution group and the image in the preset image library is not less than the third pre-predetermined Set the match threshold.

In this embodiment, by determining the shape feature, the texture feature set, and the color feature set as the initialization group, and then performing multiple mutations, intersections, and selection operations, multiple evolutions are performed to obtain the first evolution image, which further reduces the The matching difficulty of the images in the two preset image libraries improves the accuracy of image recognition and improves the efficiency of image recognition. The second preset number threshold is 8000-11000, and the third preset matching threshold is 0.6-0.9. The mutation, crossover, and selection operations can be implemented by a differential evolution algorithm.

In any of the above embodiments, preferably, the method further includes: an updating unit 224, configured to add a matching image to the first preset image library, and update the image feature weight table.

Example 3

According to a computer apparatus of an embodiment of the present invention, the computer apparatus comprises a processor for performing the steps of the image recognition method according to any one of the embodiments of the present invention described above when executing the computer program stored in the memory.

In this embodiment, the computer device comprises a processor for performing the steps of the image recognition method according to any of the above-mentioned embodiments of the present invention when executing the computer program stored in the memory, and thus having the above-described implementation of the present invention The full beneficial effects of the image recognition method of any of the examples proposed herein are not described herein.

Example 4

A computer readable storage medium according to an embodiment of the present invention, wherein a computer program is stored thereon, and when the computer program is executed by the processor, the steps of the image recognition method according to any one of the embodiments of the present invention described above are implemented.

In this embodiment, a computer readable storage medium having stored thereon a computer program executed by a processor to implement the steps of the image recognition method of any of the above-described embodiments of the present invention, and thus having the above-described present invention The entire beneficial effects of the image recognition method of any of the embodiments proposed in the embodiments are not described herein.

Example 5

As shown in FIG. 3, the image recognition method according to another embodiment of the present invention, after inputting the food material image in step S302, performing step S304 area suggestion box division, step S306, selecting a certain area suggestion box, step S308, extracting Corner feature, then proceeding to step S312 to match the shape trend in the shape library, step S314, determining the shape feature of the food item, step S318, adding to the initialization group, and performing step S310 in the selected certain area suggestion box, Extracting the color feature and the texture feature, step S318, adding to the initialization group, and then performing step S320 according to the user ingredient preference library, initializing the color feature weight and step S324, initializing the texture feature weight, and performing step S322 after step S320 to filter out the weight is greater than a color feature set of 0.4, after step S324, step S326 is performed to filter out a texture feature set having a weight greater than 0.4, in which the step S328 randomly selects the color feature and the step S330 randomly selects the texture feature, and then proceeds to step S332 according to the food material. Image library, evaluating evolution results, step S334, according to The food image library calculates the matching degree, and proceeds to step S336 to determine whether the evaluation condition is satisfied. If the determination is yes, the process proceeds to step S338 to form a first evolution image. If the evaluation condition is not satisfied, the process proceeds to step S328 to re-randomly select the color feature and reselect. Texture features.

The technical solution of the present invention is described in detail above with reference to the accompanying drawings. The present invention provides an image recognition method, apparatus, computer device and readable storage medium, according to a shape feature, a texture feature set and a color feature set according to an image to be recognized. Determining a first evolution image corresponding to the image to be identified, and then comparing a matching degree of the image of the first evolution image with the second preset image library, determining a matching image of the image to be recognized, improving the accuracy of image recognition, and reducing The number of sample images saves hardware resources.

The steps in the method of the present invention can be sequentially adjusted, combined, and deleted according to actual needs.

The units in the apparatus of the present invention can be combined, divided, and deleted according to actual needs.

One of ordinary skill in the art can understand that all or part of the various methods of the above embodiments can be completed by a program to instruct related hardware, the program can be stored in a computer readable storage medium, and the storage medium includes read only Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read Only Memory (Erasable Programmable Read Only Memory) EPROM), One-Time Programmable Read-Only Memory (OTPROM), Electronically-Erasable Programmable Read-Only Memory (EEPROM), Read-Only Disc (Compact Disc) Read-Only Memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other medium readable by a computer that can be used to carry or store data.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

An image recognition method, comprising:

Determining a shape feature of the image to be identified;

Extracting texture features and color features of the image to be identified;

Determining a weight of each texture feature of the image to be recognized and a weight of each color feature according to an image feature weight table in the first preset image library;

Filtering the texture features and color features that are greater than the preset weights to form the texture feature set and the color feature set respectively;

Determining, according to the shape feature, the texture feature set, and the color feature set, a first evolution image corresponding to the image to be identified;

Comparing the matching degree of the first evolution image with any of the second preset image libraries to determine a matching image of the image to be recognized.
The image recognition method according to claim 1, wherein the determining the shape feature of the image to be recognized comprises:

Extracting a corner feature of the image to be identified;

Calculating a degree of matching between the corner feature and any shape in the preset shape library to determine a maximum matching degree;

Determining whether the maximum matching degree is greater than a first preset matching degree threshold;

If it is determined that the maximum matching degree is greater than the first preset matching degree threshold, determining that the shape corresponding to the maximum matching degree is a shape feature of the image to be identified;

If it is determined that the maximum matching degree is not greater than the first preset matching degree threshold, the corner feature of the image to be recognized is continuously extracted.
The image recognition method according to claim 1 or 2, wherein the determining, according to the shape feature, the texture feature set, and the color feature set, a first evolution image corresponding to the image to be recognized, include:

Forming a shape space according to the shape feature;

Randomly selecting a texture feature in the texture feature set and a color feature in the color feature set are respectively disposed in the shape space to form a second evolution image;

Determining whether the second evolved image satisfies a first preset condition;

If it is determined that the second evolved image satisfies the first preset condition, determining that the second evolved image is the first evolved image;

If it is determined that the second evolved image does not satisfy the first preset condition, re-randomly selecting the texture feature in the texture feature set and the color feature in the color feature set are respectively sequentially disposed in the shape space To form a new second evolutionary image,

The first preset condition is that the maximum matching degree between the second evolved image and the image in the second preset image library is not less than a second preset matching degree threshold and/or the number of judgments is not less than the first The preset number of thresholds.
The image recognition method according to claim 1 or 2, wherein the determining, according to the shape feature, the texture feature set, and the color feature set, a first evolution image corresponding to the image to be recognized, include:

Determining, the shape feature, the texture feature set, and the color feature set are initialization groups;

Performing mutation, crossover, and selection operations on the initialization population in order to form an evolutionary population;

Determining whether the evolved group satisfies a second preset condition;

If it is determined that the evolved group satisfies the second preset condition, determining an image corresponding to the evolved group as the first evolved image;

If it is determined that the evolved group does not satisfy the second preset condition, the evolved group is used as the initialization group, and the mutation, intersection, and selection operations are sequentially performed,

The second preset condition is that the number of the mutation, intersection, and selection operations is not less than a second preset number threshold and/or an image corresponding to the evolved group and an image of the preset image library. The matching degree is not less than the third preset matching degree threshold.
The image recognition method according to claim 1 or 2, wherein the matching of the image to be recognized is determined by comparing the matching degree of any one of the first evolution image and the second preset image library After the image, it also includes:

Adding the matching image to the first preset image library and updating the image feature weight table.
An image recognition device, comprising:

a determining unit, configured to determine a shape feature of the image to be identified;

An extracting unit, configured to extract a texture feature and a color feature of the image to be identified;

The determining unit is further configured to: determine, according to the image feature weight table in the first preset image library, a weight of each texture feature of the to-be-identified image and a weight of each color feature;

a screening unit, configured to filter the texture feature and the color feature that are greater than the preset weight to form a texture feature set and a color feature set respectively;

The determining unit is further configured to: determine, according to the shape feature, the texture feature set, and the color feature set, a first evolution image corresponding to the image to be identified;

And a comparing unit, configured to compare a matching degree between the first evolved image and any one of the second preset image libraries, and determine a matching image of the image to be recognized.
The image recognition device according to claim 6, wherein

The extracting unit is further configured to: extract a corner feature of the image to be identified;

The image recognition device further includes:

a calculating unit, configured to calculate a matching degree between the corner feature and any shape in the preset shape library to determine a maximum matching degree;

a first determining unit, configured to determine whether the maximum matching degree is greater than a first preset matching degree threshold;

The determining unit is further configured to: when the first determining unit determines that the maximum matching degree is greater than the first preset matching degree threshold, determine that the shape corresponding to the maximum matching degree is the shape of the image to be recognized feature;

The extracting unit is further configured to: when the first determining unit determines that the maximum matching degree is not greater than the first preset matching degree threshold, continue to extract a corner feature of the to-be-identified image.
The image recognition device according to claim 6 or 7, further comprising:

a building unit, configured to construct a shape space according to the shape feature;

a selection unit, configured to randomly select a texture feature in the texture feature set and a color feature in the color feature set to be sequentially disposed in the shape space, respectively, to form a second evolution image;

a second determining unit, configured to determine whether the second evolved image meets a first preset condition;

The determining unit is further configured to: when the second determining unit determines that the second evolved image meets the first preset condition, determine that the second evolved image is the first evolved image;

The selecting unit is further configured to: when the second determining unit determines that the second evolved image does not satisfy the first preset condition, re-randomly select a texture feature and the color feature in the texture feature set Color features in the set are respectively disposed in the shape space to form a new second evolution image.

The first preset condition is that the maximum matching degree between the second evolved image and the image in the second preset image library is not less than a second preset matching degree threshold and/or the number of judgments is not less than the first The preset number of thresholds.
The image recognition device according to claim 6 or 7, wherein

The determining unit is further configured to: determine the shape feature, the texture feature set, and the color feature set as an initialization group;

The image recognition device further includes:

An operation unit, configured to sequentially perform mutation, crossover, and selection operations on the initialization population to form an evolutionary group;

a third determining unit, configured to determine whether the evolved group satisfies a second preset condition;

The determining unit is further configured to: determine, when the evolved group satisfies the second preset condition, an image corresponding to the evolved group as the first evolution image;

The operating unit is further configured to: when the evolved group does not satisfy the second preset condition, use the evolved group as the initialization group, and continue to perform the mutation, crossover, and selection operations sequentially,

The second preset condition is that the number of the mutation, intersection, and selection operations is not less than a second preset number threshold and/or an image corresponding to the evolved group and an image of the preset image library. The matching degree is not less than the third preset matching degree threshold.
The image recognition device according to claim 6 or 7, further comprising:

And an updating unit, configured to add the matching image to the first preset image library, and update the image feature weight table.
A computer apparatus, comprising: a processor, wherein the processor is operative to perform the steps of the image recognition method according to any one of claims 1 to 5 when the computer program stored in the memory is executed.
A computer readable storage medium having stored thereon a computer program, wherein the computer program is executed by a processor to implement the steps of the image recognition method according to any one of claims 1 to 5.