CN111432212B - Intra-frame division method, system and storage medium based on texture feature - Google Patents

Abstract

The invention discloses an intra-frame division method, a system and a storage medium based on texture features, wherein the method comprises the following steps: extracting first texture information of a coding unit through a first index, a second index and a third index, and dividing the coding unit into a first coding unit, a second coding unit or a third coding unit; wherein, the first coding unit is a coding unit capable of terminating division; then determining a division mode of the second coding unit according to a fourth index and a fifth index; and finally, determining the dividing mode of the third coding unit through a sixth index and a seventh index. The invention deletes redundant partition modes by determining the partition modes of each code and determining the optimal partition mode, thereby reducing the complexity of the encoder and being widely applied to the technical field of data processing.

Description

Intra-frame division method, system and storage medium based on texture feature

technical field

The present invention relates to the technical field of data processing, in particular to an intra-frame division method, system and storage medium based on texture features.

Background technique

VVC/H.266 is a next-generation video coding standard based on the HEVC/H.265 coding standard. The VVC standard is still being developed, and it inherits most of the traditional coding tools and the hybrid coding framework, including intra (inter) prediction, transform quantization, entropy coding and loop filtering, but while continuing most coding tools Many new technologies have also been adopted, which greatly improves the coding efficiency. The goal of H.266/VVC is to reduce the coding rate of H.266/VVC to half that of H.265/HEVC compared with H.265/HEVC under the same quality condition.

In order to better describe the texture of video content, H.266/VVC introduces MTT division based on H.265/HEVC, that is, based on QT division, BT and TT division are added. Among them, the QT division is the same as that specified in the H.265/HEVC standard, in which the CU is divided into four sub-blocks of equal area, and the length and width of the CU of each child node are half of the original parent node CU. The newly introduced BT and TT divisions both have horizontal and vertical directions. The BT division is to divide the CU into two sub-blocks with equal areas. If it is divided horizontally, the length of the CU of the sub-block is the same as that of the parent node CU. The width is half of that of the parent node CU. On the contrary, if it is vertically divided, the width of the CU of the child block is the same as that of the parent node CU, and the length is half of the parent node CU. Instead, the TT partition divides the CU into three sub-blocks with an area ratio of 1:2:1.

In addition to introducing new division modes, H.266/VVC also improves the intra-frame coding part. First of all, H.266/VVC has refined the angle mode, expanding from 33 angle modes of HEVC to 65 kinds. In addition, VVC also introduces technologies such as wide-angle prediction mode, PDPC prediction mode, MRL prediction mode and ISP prediction mode. The newly introduced prediction mode can better describe the texture in the video image and improve the compression efficiency. Among them, the characteristics of the image include the color characteristics, texture characteristics, shape characteristics and spatial relationship characteristics of the image, which can comprehensively describe the content and properties of different aspects of an image, and the content and properties of the image are the result of the division of coding units. closely related.

However, while improving the compression efficiency, VVC also brings huge complexity, which brings difficulties to the practical application of VVC.

SUMMARY OF THE INVENTION

In view of this, embodiments of the present invention provide a texture feature-based intra-frame division method, system, and storage medium that can improve and reduce the complexity of an encoder.

A first aspect of the present invention provides an intra-frame division method based on texture features, including:

The first texture information of the coding unit is extracted by the first index, the second index and the third index, and the coding unit is divided into the first coding unit, the second coding unit or the third coding unit; the first coding unit is a coding unit that can terminate the division, the second coding unit is a coding unit that performs three-fork division, and the third coding unit is a coding unit that performs two-fork or four-fork division;

determining the division mode of the second coding unit according to the fourth index and the fifth index;

Determine the division mode of the third coding unit by the sixth index and the seventh index;

Wherein, the first index is used to determine the pixel consistency of the coding unit;

The second index is used to determine the first texture information of the coding unit in the vertical direction;

The third index is used to determine the first texture information of the coding unit in the horizontal direction;

The fourth index and the fifth index are used to determine the texture direction of the coding unit;

The sixth index and the seventh index are used to determine the consistency of texture directions between sub-blocks.

In some embodiments, the first texture information of the coding unit is extracted by using the first index, the second index and the third index, and the coding unit is divided into the first coding unit, the second coding unit or the third coding unit This step of the unit is as follows:

When the first texture information is less than a first threshold, determining the coding unit as the first coding unit;

When the first texture information is greater than a second threshold, determining the coding unit as a second coding unit;

When the first texture information is greater than a first threshold and less than a second threshold, the coding unit is determined as a third coding unit.

In some embodiments, the step of determining the division mode of the second coding unit according to the fourth index and the fifth index is specifically:

When the fourth index is greater than the fifth index, it is determined that the second coding unit performs three-pronged horizontal division;

When the fourth index is smaller than the fifth index, it is determined that the second coding unit performs three-pronged vertical division.

In some embodiments, the step of determining the division mode of the third coding unit according to the sixth index and the seventh index is specifically:

calculating the second texture information of the coding unit according to the sixth index and the seventh index;

When the second texture information is greater than a third threshold, it is determined that the third coding unit performs quad division;

When the second texture information is less than a fourth threshold, determining that the third coding unit performs binary division;

When the second texture information is greater than a fourth threshold and less than a third threshold, it is determined that the third coding unit performs binary division or quadruple division.

In some embodiments, the first indicator is determined according to the pixel value of each position on the coding unit, the height value of the coding unit, the width value of the coding unit, and the mean value of the pixel values in the coding unit;

The calculation formula of the first indicator is:

Wherein, p(x,y) represents the pixel value at the position of the xth column and the yth row in the coding unit; u is the height of the coding unit; v represents the width of the coding unit; m represents the pixel value in the coding unit mean value of .

In some embodiments, the second index is determined according to the pixel value of each position on the coding unit, the height value of the coding unit, the width value of the coding unit, and the mean value of the pixel values of each row in the coding unit;

The calculation formula of the second indicator is:

Wherein, m _y is the mean value of the pixels in the y-th row in the coding unit; p(x, y) represents the pixel value at the position of the x-th column and the y-th row in the coding unit; u is the height of the coding unit; v represents the width of the coding unit;

The third index is determined according to the pixel value of each position on the coding unit, the height value of the coding unit, the width value of the coding unit and the mean value of each column of pixel values in the coding unit;

The calculation formula of the third indicator is:

Wherein, m _x is the mean value of the pixel in the xth column in the coding unit; p(x,y) represents the pixel value at the position of the xth column and the yth row in the coding unit; u is the height of the coding unit; v Represents the width of this coding unit.

In some embodiments, the fourth index is calculated according to the first index and the second index;

The fifth index is calculated according to the first index and the third index;

Wherein, the calculation formula of the fourth indicator is:

LEN _H =|MAD-MAD _H |

MAD represents the first indicator; MAD _H represents the second indicator;

Wherein, the calculation formula of the fifth index is:

LEN _V = |MAD-MAD _V |

MAD stands for the first indicator; MAD _V stands for the third indicator.

In some embodiments, the sixth index is calculated according to the second index of each sub-block;

The seventh index is calculated according to the third index of each sub-block;

Wherein, the calculation formula of the sixth indicator is:

diff _H = |MAD _H1 -MAD _H2 |+|MAD _H3 -MAD _H4 |

MAD _H1 represents the second indicator of the first sub-block; MAD _H2 represents the second indicator of the second sub-block; MAD _H3 represents the second indicator of the third sub-block; MAD _H4 represents the second indicator of the fourth sub-block;

The calculation formula of the seventh index is:

diff _V =|MAD _V1 -MAD _V3 |+|MAD _V2 -MAD _V4 |

MAD _V1 represents the third indicator of the first sub-block; MAD _V2 represents the third indicator of the second sub-block; MAD _V3 represents the third indicator of the third sub-block; MAD _V4 represents the third indicator of the fourth sub-block.

According to a second aspect of the present invention, there is also provided an intra-frame partitioning system based on texture features, including:

an extraction module, configured to extract the first texture information of the coding unit through the first index, the second index and the third index, and divide the coding unit into the first coding unit, the second coding unit or the third coding unit; the The first coding unit is a coding unit that can terminate the division, the second coding unit is a coding unit that performs three-pronged division, and the third coding unit is a coding unit that performs binary or quadruple division;

a first division module, configured to determine the division mode of the second coding unit according to the fourth index and the fifth index;

a second division module, configured to determine the division mode of the third coding unit through the sixth index and the seventh index;

Wherein, the first index is used to determine the pixel consistency of the coding unit;

The second index is used to determine the first texture information of the coding unit in the vertical direction;

The third index is used to determine the first texture information of the coding unit in the horizontal direction;

The fourth index and the fifth index are used to determine the texture direction of the coding unit.

According to a third aspect of the present invention, a storage medium is also provided, and the storage medium stores a program, and the program is executed by a processor to complete the method according to the first aspect.

The embodiment of the present invention extracts the first texture information of the coding unit by using the first index, the second index and the third index, and divides the coding unit into the first coding unit, the second coding unit or the third coding unit; wherein , the first coding unit is a coding unit that can terminate the division; then according to the fourth index and the fifth index, determine the division mode of the second coding unit; finally through the sixth index and the seventh index, determine the third coding The division mode of the unit. By clarifying the division mode of each coding and determining the optimal division mode, the present invention deletes redundant division modes, thereby reducing the complexity of the encoder.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the overall step flow chart of the embodiment of the present invention;

FIG. 2 is a schematic diagram of four sub-blocks according to an embodiment of the present invention.

Detailed ways

The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and specific embodiments of the description. The step numbers in the embodiments of the present invention are set only for the convenience of elaboration, and the sequence between the steps is not limited, and the execution sequence of the steps in the embodiments can be performed according to the understanding of those skilled in the art Adaptive adjustment.

In view of the problems existing in the prior art, the present invention uses seven indicators to describe the texture of the coding unit, which are MAD, MAD _H , MAD _V , LEN _H , LEN _v , diff _H and diff _V . The definitions of indicators and what they represent are explained:

1. The first indicator: MAD;

Among them, p(x,y) represents the pixel value located at (x,y) in the coding unit, that is, the pixel value at the position of the xth column and the yth row, and u and v represent the height (Height) and width ( Width), m represents the mean value of the pixel values in the coding unit, and m is defined as follows

Among them, MAD is used to describe the consistency of the pixels of the coding unit. The larger the MAD, the more complex the texture of the prediction unit, and the greater the probability that further division is required. On the contrary, the smaller the MAD, the more similar the pixel values in the coding unit, and the more inclined to terminate the division.

2. The second indicator: MAD _H ;

MAD _H is defined as follows

where m _y is the mean of the pixels in the y-th row of the coding unit, which is defined as follows

MAD _H is used to measure the texture in the vertical direction on the coding unit. If the MAD _H is larger, it means that the texture in the vertical direction on the coding unit is more complicated.

3. The third indicator: MAD _V ;

MAD _V is defined as follows

Among them, m _x is the mean value of the pixels in the xth column in the coding unit, which is defined as follows

MAD _v is used to measure the texture in the horizontal direction on the coding unit. If the MAD _v is larger, it means that the texture in the horizontal direction on the coding unit is complex.

4. The fourth index LEN _H and the fifth index LEN _v ;

LEN _H and LEN _v are defined as follows

LEN _H =|MAD-MAD _H |

LEN _V = |MAD-MAD _V |

LEN _H and LEN _v are used to measure the main direction of the texture in a coding unit. This is because LEN _H is defined as the absolute value of the difference between MAD _H and MAD, and LEN _v is defined as the absolute value of the difference between MAD _v and MAD. If LEN _H >LEN _v , it means that the MAD value on the coding unit is mainly caused by the texture in the horizontal direction, which means that there are many textures in the horizontal direction in the coding unit. The encoder VTM of H.266/VVC is more inclined to perform horizontal binary or triple division when encoding the unit. On the contrary, if LEN _H < LEN _v , it means that the MAD value on the coding unit is mainly caused by the texture in the vertical direction, which means that there are more textures in the vertical direction in the coding unit. The VTM is more inclined to perform vertical binary or triple division when encoding this unit.

5. The sixth index diff _H and the seventh index diff _V ;

diff _H and diff _V are defined as follows

diff _H = |MAD _H1 -MAD _H2 |+|MAD _H3 -MAD _H4 |

diff _V =|MAD _V1 -MAD _V3 |+|MAD _V2 -MAD _V4 |

In a coding unit with a size of 32×32, the embodiment of the present invention divides the CU into four sub-blocks of the same size. The specific division method is shown in FIG. 2 , and the upper left, upper right, lower left and lower right Several sub-blocks are labeled 1, 2, 3 and 4. After it is divided into four identical sub-blocks, the MAD, MAD _H and MAD _V values of each sub-block need to be calculated and marked as MAD _i , MAD _Hi and MAD _Vi , where i is the label in each sub-block .

These two indicators are used to measure whether the texture directions of sub-blocks 1, 2, 3 and 4 are consistent. If min(diff _H , diff _V ) is relatively large, it means that the texture of the CU in both the horizontal and vertical directions is relatively complex. In this case, the best division method is quadratic division. When the texture direction is relatively coherent and consistent, if the texture of the coding unit is mainly in the horizontal direction, usually diff _H <diff _V . Then the VTM is more inclined to divide the coding unit horizontally when coding. On the contrary, if the texture of the coding unit is mainly in the vertical direction, usually diff _H >diff _V , in this case, the VTM is more inclined to divide the coding unit vertically.

Below in conjunction with accompanying drawing 1 of the specification, the overall step flow of the embodiment of the present invention is described in detail:

Since the coding unit of size 32×32 is VTM, binary and trigeminal partition modes are enabled. Like H.265/HEVC, H.266/VVC also adopts a recursive manner, and obtains the optimal division mode by traversing all possible division modes and optimizing the rate-distortion. In this embodiment, the coding unit of 32×32 is processed, and the complexity of coding it is reduced by pruning some redundant division modes on the node. Specifically, the present invention can be divided into three processes, and the specific algorithm is as follows.

S1. Extract the first texture information texture ₁ of the coding unit through the three indicators of MAD, MAD _H and MAD _V , and define texture ₁ as texture ₁ =min(MAD,MAD _H ,MAD _V )

Then, the coding units are classified into three categories A, B, and C by the first threshold th ₁ and the second threshold th ₂ . Among them, the pixel table of the coding unit of type A (ie the first coding unit) is flat, and the division can be terminated in advance; the coding unit of type B (ie the second coding unit) has complex texture, and the three-point division is performed subsequently; the coding unit of type C (ie the third coding unit) Coding unit) The texture complexity is between A and B, and this type of coding unit only performs binary or quadratic partition mode subsequently.

Specifically, if texture ₁ < th1, then the coding unit is classified as class A; if texture ₁ > th2, then the coding unit is classified as class B; if th1 < texture ₁ < th2, then the coding unit is classified as class B Classified as Class C.

S2. Further simplify the division mode of the coding unit of type B.

The present embodiment describes the texture by using two indicators, LEN _H and LEN _V. When LEN _H > LEN _V , it is determined that the second coding unit performs three-way horizontal division; when LEN _H < LEN _V , it is determined that the second coding unit performs three-way vertical division.

S3. Further simplify the division mode of the coding unit of the C type.

In this embodiment, the second texture information texture ₂ of the C-type coding unit is analyzed through diff _H and diff _V , and texture ₂ is defined as texture ₂ =min(diff _H ,diff _V )

The C-type coding units are then divided into three categories by a third threshold th ₃ and a fourth threshold th ₄ . If texture ₂ > th3, then perform quadratic division; if texture ₂ < th4, then perform binary division on the texture; finally, if th4 < texture ₂ < th3, then the quad and binary division modes compete.

An embodiment of the present invention also provides an intra-frame division system based on texture features, including:

an extraction module, configured to extract the first texture information of the coding unit through the first index, the second index and the third index, and divide the coding unit into the first coding unit, the second coding unit or the third coding unit; the The first coding unit is a coding unit that can terminate the division, the second coding unit is a coding unit that performs three-pronged division, and the third coding unit is a coding unit that performs binary or quadruple division;

a first division module, configured to determine the division mode of the second coding unit according to the fourth index and the fifth index;

a second division module, configured to determine the division mode of the third coding unit through the sixth index and the seventh index;

Wherein, the first index is used to determine the pixel consistency of the coding unit;

The second index is used to determine the first texture information of the coding unit in the vertical direction;

The third index is used to determine the first texture information of the coding unit in the horizontal direction;

The fourth index and the fifth index are used to determine the texture direction of the coding unit.

According to an embodiment of the present invention, a storage medium is also provided, and the storage medium stores a program, and the program is executed by a processor to complete the method shown in FIG. 1 .

To sum up, the present invention can reduce the complexity of the encoder by clarifying the division mode of each coding and by determining the optimal division mode.

In some alternative implementations, the functions/operations noted in the block diagrams may occur out of the order noted in the operational diagrams. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/operations involved. Furthermore, the embodiments presented and described in the flowcharts of the present invention are provided by way of example in order to provide a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of the various operations are altered and in which sub-operations described as part of larger operations are performed independently.

Furthermore, while the invention is described in the context of functional modules, it is to be understood that, unless stated to the contrary, one or more of the described functions and/or features may be integrated in a single physical device and/or or software modules, or one or more functions and/or features may be implemented in separate physical devices or software modules. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary to understand the present invention. Rather, given the attributes, functions, and internal relationships of the various functional modules in the apparatus disclosed herein, the actual implementation of the modules will be within the routine skill of the engineer. Accordingly, those skilled in the art, using ordinary skill, can implement the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are illustrative only and are not intended to limit the scope of the invention, which is to be determined by the appended claims along with their full scope of equivalents.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The logic and/or steps represented in flowcharts or otherwise described herein, for example, may be considered an ordered listing of executable instructions for implementing the logical functions, may be embodied in any computer-readable medium, For use with, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from and execute instructions from an instruction execution system, apparatus, or apparatus) or equipment. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport the program for use by or in connection with an instruction execution system, apparatus, or apparatus.

More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections with one or more wiring (electronic devices), portable computer disk cartridges (magnetic devices), random access memory (RAM), Read Only Memory (ROM), Erasable Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program may be printed, as the paper or other medium may be optically scanned, for example, followed by editing, interpretation, or other suitable medium as necessary process to obtain the program electronically and then store it in computer memory.

It should be understood that various parts of the present invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or a combination of the following techniques known in the art: Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, Programmable Gate Arrays (PGA), Field Programmable Gate Arrays (FPGA), etc.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent deformations or replacements without departing from the spirit of the present invention, These equivalent modifications or substitutions are all included within the scope defined by the claims of the present application.

Claims (10)

1. The method for dividing the frame based on the texture features is characterized by comprising the following steps:

extracting the minimum value of the first index, the second index and the third index to obtain first texture information, comparing the first texture information with a threshold value, and dividing a coding unit into a first coding unit, a second coding unit or a third coding unit according to the comparison result; the first coding unit is a coding unit capable of terminating partitioning, the second coding unit is a coding unit for executing trifurcate partitioning, and the third coding unit is a coding unit for executing binary or quaternary partitioning;

determining that the second coding unit performs trifurcated horizontal division or trifurcated vertical division according to the size comparison result of the fourth index and the fifth index;

extracting the minimum value of the sixth index and the seventh index to obtain second texture information, comparing the second texture information with a threshold value, and determining that the third coding unit executes quad partitioning or binary partitioning according to the comparison result;

wherein, the first index is used for measuring the pixel consistency of the coding unit;

the second index is used for measuring the texture complexity of the coding unit in the vertical direction;

the third index is used for measuring the texture complexity of the coding unit in the horizontal direction;

the fourth index is the absolute value of the difference between the first index and the second index;

the fifth index is the absolute value of the difference between the first index and the third index;

comparing the fourth index with the fifth index, and dividing the coding unit into four subblocks with the same size, wherein the fourth index is used for measuring the main direction of the texture in the coding unit;

the sixth index is obtained by calculation according to the second index of each sub-block;

the seventh index is obtained by calculation according to the third index of each sub-block;

and comparing the sixth index with the seventh index for measuring the consistency of the texture directions among the sub-blocks.

2. The texture feature-based intra partition method according to claim 1, wherein the step of extracting the first texture information of the coding unit by the first index, the second index and the third index and dividing the coding unit into the first coding unit, the second coding unit or the third coding unit comprises:

when the first texture information is smaller than a first threshold value, determining the coding unit as a first coding unit;

when the first texture information is larger than a second threshold value, determining the coding unit as a second coding unit;

and when the first texture information is larger than a first threshold and smaller than a second threshold, determining the coding unit as a third coding unit.

3. The texture feature-based intra partition method according to claim 1, wherein the step of determining the partition mode of the second coding unit according to a fourth index and a fifth index specifically comprises:

when the fourth index is larger than the fifth index, determining that the second coding unit executes trifurcate horizontal division;

and when the fourth index is smaller than the fifth index, determining that the second coding unit executes the three-fork vertical division.

4. The texture feature-based intra partition method according to claim 1, wherein the step of determining the partition mode of the third coding unit according to a sixth index and a seventh index specifically comprises:

calculating second texture information of the coding unit according to the sixth index and the seventh index;

when the second texture information is larger than a third threshold value, determining that the third coding unit executes quad-fork division;

when the second texture information is smaller than a fourth threshold value, determining that the third coding unit executes binary partitioning;

and when the second texture information is larger than a fourth threshold and smaller than a third threshold, determining that the third coding unit executes binary division or quad division.

5. The texture feature-based intra partition method according to claim 1, wherein the first index is determined according to a pixel value of each position on the coding unit, a height value of the coding unit, a width value of the coding unit, and a mean value of pixel values in the coding unit;

the calculation formula of the first index is as follows:

wherein p (x, y) represents a pixel value located at the position of the x-th column and the y-th row in the coding unit; u height of the coding unit; v represents the width of the coding unit; m represents the mean value of the pixel values in the coding unit.

6. The texture feature-based intra partition method according to claim 1, wherein the second index is determined according to pixel values of respective positions on the coding unit, a height value of the coding unit, a width value of the coding unit, and a mean value of pixel values of each row in the coding unit;

the calculation formula of the second index is as follows:

wherein m is_yIs the average of the pixels of the y-th row in the coding unit; p (x, y) represents a pixel value located at the position of the x-th column and the y-th row in the coding unit; u height of the coding unit; v represents the width of the coding unit;

the third index is determined according to the pixel value of each position on the coding unit, the height value of the coding unit, the width value of the coding unit and the average value of the pixel values of each column in the coding unit;

the calculation formula of the third index is as follows:

wherein m is_xIs the average of the pixels of the x-th column in the coding unit; p (x, y) represents a pixel value located at the position of the x-th column and the y-th row in the coding unit; u height of the coding unit; v represents the width of the coding unit.

7. The texture feature-based intra frame division method of claim I,

the fourth index is obtained by calculation according to the first index and the second index;

the fifth index is obtained by calculation according to the first index and the third index;

wherein the calculation formula of the fourth index is as follows:

LEN_H＝|MAD-MAD_H|

MAD represents a first index; MAD_HRepresents a second index;

wherein the calculation formula of the fifth index is:

LEN_V＝|MAD-MAD_V|

MAD represents a first index; MAD_VRepresenting a third index.

8. The texture feature-based intra frame division method of claim I,

the sixth index is obtained by calculation according to the second index of each sub-block;

the seventh index is obtained by calculation according to the third index of each sub-block;

wherein the calculation formula of the sixth index is:

diff_H＝｜MAD_H1-MAD_H2|+|MAD_H3-MAD_H4|

MAD_H1a second index representing the first sub-block; MAD_H2A second index representing a second sub-block; MAD_H3A second index representing a third sub-block; MAD_H4A second index representing a fourth sub-block;

the calculation formula of the seventh index is as follows:

diff_V＝|MAD_V1-MAD_V3|+|MAD_V2-MAD_V4|

MAD_V1a third index representing the first sub-block; MAD_V2A third index representing the second sub-block; MAD_V3A third index representing a third sub-block; MAD_V4Representing the third index of the fourth sub-block.

9. An intra-frame partitioning system based on texture features, comprising:

the extraction module is used for extracting the minimum value of the first index, the second index and the third index to obtain first texture information, comparing the first texture information with a threshold value, and dividing a coding unit into a first coding unit, a second coding unit or a third coding unit according to a comparison result; the first coding unit is a coding unit capable of terminating partitioning, the second coding unit is a coding unit for executing trifurcate partitioning, and the third coding unit is a coding unit for executing binary or quaternary partitioning;

the first division module is used for determining that the second coding unit executes trifurcate horizontal division or trifurcate vertical division according to the size comparison result of the fourth index and the fifth index;

the second dividing module is used for extracting the minimum value of the sixth index and the seventh index to obtain second texture information, comparing the second texture information with a threshold value, and determining that the third coding unit executes four-fork division or two-fork division according to the comparison result;

wherein, the first index is used for measuring the pixel consistency of the coding unit;

the second index is used for measuring the texture complexity of the coding unit in the vertical direction;

the third index is used for measuring the texture complexity of the coding unit in the horizontal direction;

the fourth index is the absolute value of the difference between the first index and the second index;

the fifth index is the absolute value of the difference between the first index and the third index;

comparing the fourth index with the fifth index, and dividing the coding unit into four subblocks with the same size, wherein the fourth index is used for measuring the main direction of the texture in the coding unit;

the sixth index is obtained by calculation according to the second index of each sub-block;

the seventh index is obtained by calculation according to the third index of each sub-block;

and comparing the sixth index with the seventh index, and measuring the consistency of the texture directions among the sub-blocks.

10. A storage medium, characterized in that the storage medium stores a program, which is executed by a processor to perform the method according to any one of claims 1-8.

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