CN110232657A - A kind of image-scaling method, device, equipment and medium - Google Patents

Abstract

The invention discloses an image scaling method, device, equipment and medium. The steps of the method include: acquiring sub-image blocks generated when images in HEIC format are saved; scaling each sub-image block to generate corresponding low-resolution images Sub-tiles; combine each low-resolution sub-tile into a thumbnail image. Since this method integrates low-resolution sub-image blocks, the memory capacity occupied by each pixel is relatively smaller, which relatively reduces the memory space occupied in the process of scaling HEIC format images, thereby ensuring that The overall stability of the system during the scaling process of HEIC format images is improved. In addition, the present invention also provides an image scaling apparatus, device and computer-readable storage medium, the beneficial effects are the same as those described above.

Description

An image scaling method, device, device and medium

technical field

The present invention relates to the field of image scaling, in particular to an image scaling method, device, device and medium.

Background technique

When the current HEIC format image is saved, the complete HEIC format image is often divided into a plurality of corresponding sub-image blocks according to a certain grid (GRID) size in advance, and then when the HEIC format image is obtained, it needs to be The corresponding multiple sub-image blocks are decoded respectively, and integrated into a complete HEIC-format image according to the relative position sequence of the sub-image blocks in the HEIC format image.

Due to the limited image resolution that can be displayed by current mainstream display devices, when the size of the HEIC format image is large, the HEIC format image needs to be scaled to be displayed normally. The current way of scaling HEIC format images is to first integrate each sub-image block based on HEIC format image division into a complete HEIC format image, and then perform scaling processing on the complete HEIC format image, and finally generate a low-resolution format image. Thumbnail image. However, due to the high resolution of HEIC format images, when the HEIC image size is large, taking a panoramic photo (16374×3692) as an example, if each pixel is stored in the memory in full size in RGBA format, the required memory is 16374×3692×4 (230.6MB) bytes, so it will occupy a lot of memory space, and it is difficult to ensure the overall stability of the HEIC format image scaling process.

Thus, it can be seen that an image scaling method is provided to relatively reduce the degree of memory space occupied in the process of scaling the HEIC format image, thereby ensuring the overall stability of the scaling process for the HEIC format image, which is a skill in the art. issues that need resolving.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an image scaling method, device, equipment and medium, so as to relatively reduce the occupation of memory space in the process of scaling the HEIC format image, thereby ensuring the overall system for scaling the HEIC format image. stability.

In order to solve the above technical problems, the present invention provides an image scaling method, including:

Get the sub-image block generated when saving the HEIC format image;

Perform scaling processing on each sub-image block to generate a corresponding low-resolution sub-image block;

Integrate each low-resolution sub-image block into a thumbnail image.

Preferably, scaling each sub-image block is performed to generate corresponding low-resolution sub-image blocks, including:

Obtain the target size of the thumbnail image and the actual size of the HEIC format image, and calculate the zoom ratio according to the target size and the actual size;

Perform scaling processing on each sub-image block according to the scaling ratio to generate corresponding low-resolution sub-image blocks;

Correspondingly, each low-resolution sub-image block is integrated into a thumbnail image, including:

Obtain the row and column positions of each sub-image block in the HEIC format image;

Each low-resolution sub-image block is connected to each other according to the row and column positions of the corresponding sub-image blocks, and integrated into a thumbnail image.

Preferably, before performing scaling processing on each sub-image block according to the scaling ratio to generate a corresponding low-resolution sub-image block, the method further includes:

Allocate the target memory space of the corresponding capacity according to the target size and resolution of the thumbnail image;

Correspondingly, each sub-image block is scaled according to the scaling ratio to generate corresponding low-resolution sub-image blocks, including:

Based on the target memory space, each sub-image block is scaled according to the scaling ratio, and a corresponding low-resolution sub-image block is generated.

Preferably, the format of the low-resolution sub-image block includes JPG format.

Preferably, scaling each sub-image block is performed to generate corresponding low-resolution sub-image blocks, including:

Each sub-image block is scaled in a multi-threaded manner to generate corresponding low-resolution sub-image blocks.

Preferably, obtaining the sub-image blocks generated when saving the HEIC format image, including:

Obtain the sub-image blocks generated when saving HEIC format images based on the H265 code stream.

In addition, the present invention also provides an image zooming device, the device includes a memory, a processor and a bus, wherein the memory stores an image zooming program that can be transmitted by the bus to the processor and run on the processor. When the image zooming program is executed by the processor Implement the image scaling method as described above.

Preferably, the device is a node forming a CDN network or a blockchain network.

In addition, the present invention also provides an image scaling system, the system includes:

a sub-image block obtaining unit, used for obtaining the sub-image block generated when saving the HEIC format image;

a sub-image block scaling unit, configured to perform scaling processing on each sub-image block to generate a corresponding low-resolution sub-image block;

The image block integration module is used to integrate each low-resolution sub-image block into a thumbnail image.

In addition, the present invention also provides a computer program product comprising computer instructions which, when executed on a computer, enable the computer to perform the above-mentioned image scaling method.

In addition, the present invention also provides a computer-readable storage medium on which an image scaling program is stored, and the image scaling program can be executed by one or more processors to implement the above-mentioned image scaling method.

The image scaling method provided by the present invention firstly acquires the sub-image blocks generated when the HEIC format image is saved, and then performs scaling processing on each sub-image block to generate corresponding low-resolution sub-image blocks, and finally converts each low-resolution sub-image block into Image blocks are consolidated into lower resolution thumbnail images. In this method, each sub-image block of the HEIC format image is firstly scaled, and then the low-resolution sub-image blocks generated by scaling are integrated to generate a thumbnail image. Compared with the high-resolution sub-image in the prior art In terms of block integration, since this method integrates low-resolution sub-image blocks, the memory capacity occupied by each pixel is relatively smaller, which relatively reduces the memory space required during the scaling process of HEIC format images. The occupancy level of the image, thereby ensuring the overall stability of the system during the scaling process of HEIC format images. In addition, the present invention also provides an image scaling apparatus, device and computer-readable storage medium, the beneficial effects are the same as those described above.

Description of drawings

In order to explain the embodiments of the present invention more clearly, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are not relevant to ordinary skills in the art. As far as personnel are concerned, other drawings can also be obtained from these drawings on the premise of no creative work.

1 is a flowchart of an image scaling method provided by an embodiment of the present invention;

2 is a flowchart of another image scaling method provided by an embodiment of the present invention;

3 is a flowchart of another image scaling method provided by an embodiment of the present invention;

FIG. 4 is a structural diagram of an image scaling apparatus according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Due to the limited image resolution that can be displayed by current mainstream display devices, when the size of the HEIC format image is large, the HEIC format image needs to be scaled to be displayed normally. The current way of scaling HEIC format images is to first integrate each sub-image block based on HEIC format image division into a complete HEIC format image, and then perform scaling processing on the complete HEIC format image, and finally generate a low-resolution format image. Thumbnail image. However, due to the high resolution of HEIC format images, when the HEIC image size is large, taking a panoramic photo (16374×3692) as an example, if each pixel is stored in the memory in full size in RGBA format, the required memory is 16374×3692×4 (230.6MB) bytes, so it will occupy a lot of memory space, and it is difficult to ensure the overall stability of the system during the scaling process of HEIC format images.

The core of the present invention is to provide an image scaling method to relatively reduce the degree of memory space occupied during the scaling processing of HEIC format images, thereby ensuring the overall stability of the system during scaling processing of HEIC format images. In addition, the present invention also provides an image scaling apparatus, device and computer-readable storage medium, the beneficial effects are the same as those described above.

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a flowchart of an image scaling method provided by an embodiment of the present invention. Please refer to Figure 1, the specific steps of the image scaling method include:

Step S10: Obtain the sub-image blocks generated when the HEIC format image is saved.

It should be noted that HEIC format, namely High Efficiency Image Compression format, high-performance image compression, also known as HEIF, is a new generation image format that replaces jpeg. The image format uses H265 encoding to compress the image in slices, and the compression performance is better than JPG.

The sub-image block in this step is the specific form taken when the HEIC format image is saved, that is to say, when the HEIC format image is saved, the HEIC format image is first divided into sub-image blocks and then saved. Therefore, Obtaining the sub-image blocks generated when saving the HEIC format image in this step is equivalent to obtaining the pre-saved HEIC format image. However, it should be emphasized that only obtaining the sub-image block cannot completely display the HEIC format image, but can only display the HEIC format image completely. Based on the sub-image block, the related processing operation of its corresponding complete HEIC format image is realized.

Step S11 : scaling each sub-image block to generate a corresponding low-resolution sub-image block.

It should be noted that, in computer image processing and computer graphics, image scaling (imagescaling) refers to the process of adjusting the size of a digital image. This step is to perform scaling processing on each sub-image block to generate low-resolution sub-image blocks with lower resolution. The purpose of scaling is to lose the original high-resolution sub-image blocks that cannot be displayed. Resolution processing to ensure that sub-image blocks can be displayed at lower resolutions normally after scaling. It should be emphasized that the scaling processing in this step reduces the resolution of the sub-image block while reducing the size of the sub-image block.

Step S12: Integrate each low-resolution sub-image block into a thumbnail image.

Since the display of the HEIC format image needs to be based on the integration processing between the sub-image blocks, similarly, the thumbnail image that is scaled for the HEIC format image needs to be integrated and formed based on each low-resolution sub-image block. The way of integrating each low-resolution sub-image into a whole thumbnail image can be integrated into a thumbnail image according to the corresponding positional relationship between the low-resolution sub-images, or it can be defined in the horizontal or vertical direction of the thumbnail image. Technically, the number of low-resolution sub-images included is spliced and integrated into thumbnail images according to the number sequence of each low-resolution sub-image. The specifics should be determined according to the actual application scenarios and actual needs, and are not specifically limited here.

The image scaling method provided by the present invention firstly acquires the sub-image blocks generated when the HEIC format image is saved, and then performs scaling processing on each sub-image block to generate corresponding low-resolution sub-image blocks, and finally converts each low-resolution sub-image block into Image blocks are consolidated into lower resolution thumbnail images. In this method, each sub-image block of the HEIC format image is firstly scaled, and then the low-resolution sub-image blocks generated by scaling are integrated to generate a thumbnail image. Compared with the high-resolution sub-image in the prior art In terms of block integration, since this method integrates low-resolution sub-image blocks, the memory capacity occupied by each pixel is relatively smaller, which relatively reduces the memory space required during the scaling process of HEIC format images. The occupancy level of the image, thereby ensuring the overall stability of the system during the scaling process of HEIC format images.

As a preferred embodiment, the format of the low-resolution sub-image block includes JPG format.

It should be noted that the JPG format is a very popular image format, and most computer devices can also display JPG format images normally. Users can also set the compression level at will to preserve the image quality, which is a very convenient method. Compared with images in other formats, images in JPG format have a smaller capacity, which can relatively save the occupation of storage space.

As a preferred embodiment, scaling each sub-image block is performed to generate corresponding low-resolution sub-image blocks, including:

Each sub-image block is scaled in a multi-threaded manner to generate corresponding low-resolution sub-image blocks.

It should be noted that multithreading refers to a technology that implements concurrent execution of multiple threads from software or hardware, that is, a computer with multithreading capability can execute more than one thread at the same time due to hardware support. This embodiment performs scaling processing on each sub-image block in a multi-threaded manner, which relatively improves the overall efficiency of scaling processing on sub-image blocks.

On the basis of the above embodiments, the present invention also provides the following series of preferred embodiments.

FIG. 2 is a flowchart of another image scaling method provided by an embodiment of the present invention. Please refer to Fig. 2, the specific steps of the image scaling method include:

Step S20: Obtain the sub-image blocks generated when the HEIC format image is saved.

Step S21: Acquire the target size of the thumbnail image and the actual size of the HEIC format image, and calculate the scaling ratio according to the target size and the actual size.

Step S22: Perform scaling processing on each sub-image block according to the scaling ratio to generate a corresponding low-resolution sub-image block.

It should be noted that, in the process of scaling each sub-image block in this embodiment, the target size of the thumbnail image to be generated and the actual size of the HEIC format image are obtained first, and then the difference between the target size and the actual size is calculated. The size scaling ratio, and the scaling ratio, and then perform the same size scaling on the length and width of each sub-image block according to the scaling ratio, and then generate a corresponding low-resolution sub-image block.

Step S23: Obtain the row and column positions of each sub-image block in the HEIC format image.

Step S24: Connect the low-resolution sub-image blocks to each other according to the row and column positions of the corresponding sub-image blocks, and integrate them into a thumbnail image.

In this embodiment, in the process of integrating low-resolution sub-image blocks into thumbnail images, firstly obtain the row and column positions of each sub-image block in the HEIC-format image generated by dividing the HEIC-format image, that is, each sub-image block and other sub-image blocks are obtained. The relative position between the sub-image blocks. Since the low-resolution sub-image block is generated by scaling based on the sub-image block, the relative position of the low-resolution sub-image block in the thumbnail image should be the same as that of the low-resolution sub-image. The relative positions of the sub-image blocks corresponding to the blocks in the HEIC format image are consistent. Therefore, in this embodiment, after obtaining the row and column positions of each sub-image block in the HEIC format image, each low-resolution sub-image block is sorted according to the corresponding sub-image block. Row and column positions are connected to each other and integrated into thumbnail images.

In this embodiment, each sub-image block is scaled based on the scaling ratio, which can relatively avoid deformation or distortion of the content of the generated low-resolution sub-image block. The positions of the rows and columns are connected to each other and integrated into a thumbnail image, which can relatively ensure the content integrity and availability of the thumbnail image.

FIG. 3 is a flowchart of another image scaling method provided by an embodiment of the present invention. Please refer to FIG. 3, the specific steps of the image scaling method include:

Step S30: Obtain the sub-image blocks generated when the HEIC format image is saved.

Step S31: Acquire the target size of the thumbnail image and the actual size of the HEIC format image, and calculate the scaling ratio according to the target size and the actual size.

Step S32: Allocate a target memory space of a corresponding capacity according to the target size and resolution of the thumbnail image.

Step S33 : scaling each sub-image block according to the scaling ratio based on the target memory space, to generate a corresponding low-resolution sub-image block.

Step S34: Obtain the row and column positions of each sub-image block in the HEIC format image.

Step S35: Connect the low-resolution sub-image blocks to each other according to the row and column positions of the corresponding sub-image blocks, and integrate them into a thumbnail image.

It should be noted that the focus of this embodiment is to allocate a target memory space of a corresponding capacity in advance according to the target size and resolution of the thumbnail image. For thumbnail images of different resolutions, the loading of each pixel needs to occupy There is a difference in the memory capacity of the thumbnail image, so the embodiment allocates a target memory space of a corresponding capacity according to the target size and resolution of the thumbnail image, and then scales each sub-image block according to the scaling ratio based on the pre-allocated target memory space to generate Corresponding low-resolution sub-image blocks. In this embodiment, by dividing the memory space required for generating thumbnail images in advance, it is possible to relatively avoid the situation of insufficient memory available space during the process of generating thumbnail images, and relatively ensure the overall reliability of the process of generating thumbnail images.

On the basis of the above series of implementations, as a preferred implementation, acquiring the sub-image blocks generated when saving the HEIC format image, including:

Obtain the sub-image blocks generated when saving HEIC format images based on the H265 code stream.

Compared with the H.264 code stream, the H.265 code stream relatively improves the relationship between the coding quality, delay and algorithm complexity of the code stream, achieves the optimal setting, and improves the compression efficiency, robustness and error Resilience, reduced real-time delay, channel acquisition time and random access delay, and reduced complexity. Therefore, based on the H265 code stream, this embodiment can more efficiently and reliably obtain the sub-image blocks generated when the HEIC format image is saved.

The present invention also provides a scenario embodiment under a specific application scenario, and the execution process of the scenario embodiment is as follows:

1. Analyze the HEIC image, and obtain information such as the length/width (w/h) of the HEIC image, the length/width of the sub-image block (sw/sh), the number of sub-image blocks, and the number of rows and columns of the sub-image block (tw/th). The H265 code stream of each sub-image block of the picture.

2. Select the actual size x*y to be output, and calculate the scaling ratio scale=w*h/x*y. Allocate memory S of x*y*3/2 (each pixel of JPG format image occupies 3/2M of memory space), S is used to save tw*th length/width respectively (sw/scale, sh/scale ) sub-image;

3. Multi-threaded decoding of the code stream of each sub-image block to obtain a sub-image of sw*sh, and scaling the sub-image to obtain an image whose length/width are (sw/scale, sh/scale) respectively, and directly scale it into the memory S at the corresponding location.

4. It is saved as a scaled image in the memory S, which can be converted into RGBA data for display or encoded as a JPG image.

Based on the above execution process, taking a panoramic photo (16374×3692) as an example, the display size is 1024×256, and the memory required by this method is 1024×256×1.5 bytes (0.375MB), which is only occupied from the decoded image memory (without considering other memory consumption) and the original scheme (16374×3692×4) reduced by nearly 600 times.

Based on the above execution process:

7630*4912 size (8K) scene: memory usage decreased from 5.3% to 0.9%

16382*3628 (panorama photo) scene: memory usage reduced from 9.0% to 1.0%

15360*8640 (16K image) scene: memory usage reduced from 16.1% to 1.4%

In the above comparison, the larger the size of the HEIC format image, the more obvious the memory saving of this solution.

The embodiments of the image scaling method have been described in detail above. The present invention also provides an image scaling device corresponding to the method. For the embodiments of the apparatus part, please refer to the description of the embodiments of the method part, and details are not described here for the time being.

FIG. 4 is a structural diagram of an image scaling apparatus according to an embodiment of the present invention.

Referring to FIG. 4, an image scaling apparatus 1 provided by an embodiment of the present invention includes a memory 11, a processor 12, and a bus 13. The memory 11 stores data that can be transmitted from the bus 13 to the processor 12 and stored in the processor. An image scaling program running on the processor 12 implements the image scaling method described above when the image scaling program is executed by the processor 12 .

The image scaling device 1 may be a node forming a CDN network or a blockchain network. It can be a node that forms a CDN network or a blockchain network.

The memory 11 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (eg, SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, and the like. The memory 11 may be an internal storage unit of the image scaling apparatus 1 in some embodiments, such as a hard disk of the image scaling apparatus 1 . In other embodiments, the memory 11 may also be an external storage device of the image scaling device 1, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, flash memory card (Flash Card), etc. Further, the memory 11 may also include both an internal storage unit of the image scaling apparatus 1 and an external storage device. The memory 11 can not only be used to store application software installed in the image scaling device 1 and various types of data, such as codes of video transcoding programs, etc., but also can be used to temporarily store data that has been output or will be output.

The processor 12 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor or other data processing chips in some embodiments, for running program codes or processing stored in the memory 11 data, such as executing video transcoding programs, etc.

The bus 13 may be a peripheral component interconnect (PCI for short) bus or an extended industry standard architecture (Extended industry standard architecture, EISA for short) bus or the like. The bus can be divided into address bus, data bus, control bus and so on. For ease of presentation, only one thick line is used in FIG. 4, but it does not mean that there is only one bus or one type of bus.

The image scaling device provided by the present invention first acquires the sub-image blocks generated when the HEIC format image is saved, and then performs scaling processing on each sub-image block to generate corresponding low-resolution sub-image blocks, and finally converts each low-resolution sub-image block into Image blocks are consolidated into lower resolution thumbnail images. The device first performs scaling processing on each sub-image block of the HEIC format image, and then integrates the low-resolution sub-image blocks generated by scaling to generate a thumbnail image. Compared with the high-resolution sub-image in the prior art In terms of block integration, since this device integrates low-resolution sub-image blocks, the memory capacity occupied by each pixel is relatively smaller, which relatively reduces the memory space required for the HEIC format image scaling process. The occupancy level of the image, thereby ensuring the overall stability of the system during the scaling process of HEIC format images.

The present invention also provides an image scaling system, the system includes:

a sub-image block obtaining unit, used for obtaining the sub-image block generated when saving the HEIC format image;

a sub-image block scaling unit, configured to perform scaling processing on each sub-image block to generate a corresponding low-resolution sub-image block;

The image block integration module is used to integrate each low-resolution sub-image block into a thumbnail image.

The image scaling system provided by the present invention first acquires the sub-image blocks generated when the HEIC format image is saved, and then performs scaling processing on each sub-image block to generate corresponding low-resolution sub-image blocks, and finally converts each low-resolution sub-image block into Image blocks are consolidated into lower resolution thumbnail images. The system first performs scaling processing on each sub-image block of the HEIC format image, and then integrates the low-resolution sub-image blocks generated by scaling to generate a thumbnail image. Compared with the high-resolution sub-image in the prior art In terms of block integration, since the system integrates low-resolution sub-image blocks, the memory capacity occupied by each pixel is relatively smaller, which relatively reduces the memory space required for the HEIC format image scaling process. The occupancy level of the image, thereby ensuring the overall stability of the system during the scaling process of HEIC format images.

In addition, the present invention also provides a computer-readable storage medium on which a computing terminal data processing program is stored, and the computing terminal data processing program can be executed by one or more processors to realize the above-mentioned image scaling method.

The computer-readable storage medium provided by the present invention first acquires the sub-image blocks generated when the HEIC format image is saved, and then performs scaling processing on each sub-image block to generate corresponding low-resolution sub-image blocks, and finally converts the low-resolution sub-image blocks into Rate sub-image blocks are consolidated into lower resolution thumbnail images. The computer-readable storage medium first performs scaling processing on each sub-image block of the HEIC format image, and then integrates the low-resolution sub-image blocks generated by scaling to generate a thumbnail image. In terms of the integration of sub-image blocks with high resolution, since the computer-readable storage medium integrates low-resolution sub-image blocks, the memory capacity occupied by each pixel is relatively smaller, which relatively reduces the need for HEIC format images. The degree of memory space occupied during the scaling process, thereby ensuring the overall stability of the system during the scaling process for HEIC format images.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

It should be noted that the above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments. And the terms "comprising", "comprising" or any other variation thereof herein are intended to encompass a non-exclusive inclusion such that a process, device, article or method comprising a list of elements includes not only those elements, but also includes no explicit Other elements listed, or those inherent to such a process, apparatus, article, or method are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, apparatus, article, or method that includes the element.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields , are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. an image scaling method, is characterized in that, comprises: Get the sub-image block generated when saving the HEIC format image; scaling each of the sub-image blocks to generate corresponding low-resolution sub-image blocks; Each of the low-resolution sub-image blocks is integrated into a thumbnail image. 2. The image scaling method according to claim 1, wherein the performing scaling processing on each of the sub-image blocks to generate a corresponding low-resolution sub-image block, comprising: Obtain the target size of the thumbnail image and the actual size of the HEIC format image, and calculate a scaling ratio according to the target size and the actual size; Perform the scaling process on each of the sub-image blocks according to the scaling ratio to generate corresponding low-resolution sub-image blocks; Correspondingly, integrating each of the low-resolution sub-image blocks into a thumbnail image includes: obtaining the row and column positions of each of the sub-image blocks in the HEIC format image; The low-resolution sub-image blocks are connected to each other according to the row and column positions corresponding to the sub-image blocks, and integrated into the thumbnail image. 3 . The image scaling method according to claim 2 , wherein, before performing the scaling processing on each of the sub-image blocks according to the scaling ratio to generate a corresponding low-resolution sub-image block, 3 . The method also includes: Allocate a target memory space of a corresponding capacity according to the target size and resolution of the thumbnail image; Correspondingly, performing the scaling process on each of the sub-image blocks according to the scaling ratio to generate a corresponding low-resolution sub-image block includes: The scaling process is performed on each of the sub-image blocks according to the scaling ratio based on the target memory space, and a corresponding low-resolution sub-image block is generated. 4 . The image scaling method according to claim 1 , wherein the format of the low-resolution sub-image block comprises a JPG format. 5 . 5. The image scaling method according to claim 1, wherein the performing scaling processing on each of the sub-image blocks to generate a corresponding low-resolution sub-image block, comprising: The scaling processing is performed on each of the sub-image blocks in a multi-threaded manner to generate corresponding low-resolution sub-image blocks. 6. The image scaling method according to any one of claims 1 to 5, wherein the acquiring and saving the sub-image blocks generated when the HEIC format image comprises: The sub-image block generated when the HEIC format image is saved is acquired based on the H265 code stream. 7. An image scaling device, characterized in that the device comprises a memory, a processor and a bus, the memory storing an image scaling device that can be transferred from the bus to the processor and run on the processor A program, when the image scaling program is executed by the processor, implements the image scaling method according to any one of claims 1 to 6. 8 . The device according to claim 7 , wherein the device is a node forming a CDN network or a blockchain network. 9 . 9. An image scaling system, wherein the system comprises: a sub-image block obtaining unit, used for obtaining the sub-image block generated when saving the HEIC format image; a sub-image block scaling unit, configured to perform scaling processing on each of the sub-image blocks to generate corresponding low-resolution sub-image blocks; The image block integration module is used for integrating each of the low-resolution sub-image blocks into a thumbnail image. 10. A computer-readable storage medium, characterized in that, an image scaling program is stored on the computer-readable storage medium, and the image scaling program can be executed by one or more processors to realize the steps of claim 1 to The image scaling method described in any one of 6.