Image enhancement method for tablet computer

Abstract

The invention discloses an image enhancement method for a tablet computer, and belongs to the fields of computer image display technology and image processing technology. The method first generates a plurality of high-resolution images of different sizes, and saves the high-resolution images in a super-resolution image folder. When the image is zoomed in or out, the corresponding image in the super-resolution image folder is retrieved, and the image is properly processed to obtain clear images of various sizes. In the process of zooming in or out of the image on the tablet computer, the method replaces the corresponding original image zoomed in or out by the processed super-resolution image to obtain a clear image, thereby achieving the purpose of enhancing the image and facilitating the user to view.

Description

Technical Field

[0001] The present invention relates to computer image display technology and image processing technology, and in particular to an image enhancement method for a tablet computer. Background Art

[0002] Tablet computers usually acquire images through self-portraits, built-in software, and USB transmission. Whether the acquired images are displayed clearly on the tablet computer is not only affected by the tablet computer screen resolution and image processing software, but also by the size of the image displayed on the tablet computer.

[0003] The clarity of the same image when enlarged and reduced on a tablet is generally different. This is because when an image is enlarged, the pixels in the original image will be stretched or even pixelated, causing the image to be unclear; and when an image is reduced, the pixels need to be stacked together and some details will be lost due to the reduction of pixels, which will also cause the displayed image to be unclear; the main reason for this is that the quality or resolution of the original image is not high enough and does not have too many details.

[0004] In summary, it is worth studying how to obtain clear images when zooming in and out on a tablet computer. Summary of the invention

[0005] In order to overcome the problems existing in the above technologies, the present invention provides an image enhancement method for a tablet computer, the method comprising:

[0006] (1) Acquiring images through a tablet computer, including images taken by the tablet computer and images received through other means; the other means include but are not limited to images received by the tablet computer through software and images directly transmitted through a USB device;

[0007] (ii) using an image super-resolution method to process an image acquired by a tablet computer to obtain a super-resolution image, requiring that the resolution of the obtained super-resolution image be greater than a resolution threshold of the tablet computer screen;

[0008] (iii) using the method in (ii) to generate multiple super-resolution images of different sizes according to the size of the tablet computer display screen; saving the generated multiple super-resolution images of different sizes into a super-resolution image folder; the super-resolution image folder refers to a folder that only stores the generated multiple super-resolution images of different sizes;

[0009] (iv) When a user needs to view an image that has been saved on the tablet computer, the user clicks on the image. According to the initial size of the image clicked by the user, the tablet computer will automatically retrieve a super-resolution image of a corresponding size from the super-resolution image folder, and reduce the resolution of the super-resolution image, but save all the details of the super-resolution image; the resolution of the image is reduced to the resolution threshold of the tablet computer so that the user can see a clear image; if the user zooms in or out on the image, according to the image size finally adjusted by the user, the super-resolution image in the super-resolution image folder that is closest to the image finally adjusted by the user is automatically retrieved, the retrieved super-resolution image is appropriately resized, accompanied by image enhancement and resolution reduction processing, the size of the super-resolution image in the retrieved super-resolution image folder is adjusted to the same size as the image finally adjusted by the user, and the original image scaled by the user is replaced and presented on the display screen of the tablet computer;

[0010] (V) When the user needs to view an image newly received by the tablet computer, the tablet computer will perform priority processing on the newly received image clicked by the user; the priority processing refers to first performing the processing of steps (II) and (III) on the image clicked by the user; after the priority processing is performed on the image clicked by the user, the image clicked by the user is regarded as an image that has been saved on the tablet computer; according to the image size adjusted by the user, the method in step (IV) is used to obtain the enhanced corresponding image and present it on the display screen of the tablet computer for the user to view.

[0011] Furthermore, acquiring images through the tablet computer also includes: the acquired images also include images saved in a common folder of the tablet computer, and the common folder refers to a folder other than the super-resolution image folder.

[0012] Furthermore, the image super-resolution method includes: the image super-resolution method adopted is an image super-resolution method based on a cascaded convolutional neural network, which completes the super-resolution task through four parts: feature extraction block sFEBs, enhancement block EB, reconstruction block CB and feature refinement block, and restores the details and clarity of the super-resolution image from the low-resolution image.

[0013] Furthermore, the resolution of the obtained super-resolution image is greater than the resolution threshold of the tablet computer screen, including: the reason why the resolution of the obtained super-resolution image is greater than the resolution threshold of the tablet computer screen is that when an appropriate method is used to reduce the resolution of the super-resolution image in a later stage, a clear image can still be obtained.

[0014] Furthermore, the generating of multiple super-resolution images of different sizes according to the size of the tablet computer display screen includes: the size of the tablet computer display screen refers to the length of the length and width of the display screen; the method of generating multiple super-resolution images of different sizes is: according to the length of the length and width of the tablet computer display screen, according to the ratio of the length and width, the length and width of the tablet computer are proportionally reduced, and multiple super-resolution images of different sizes are generated as much as possible.

[0015] Further, the initial size of the image clicked by the user includes: the tablet computer needs to set the initial size of the image clicked by the user to be one of the sizes of the corresponding image stored in the super-resolution image folder.

[0016] Furthermore, the tablet computer will automatically retrieve the super-resolution image of the corresponding size in the super-resolution image folder, and reduce the resolution of the super-resolution image, including: arranging a corresponding script on the tablet computer to enable the tablet computer to automatically retrieve the super-resolution image in the super-resolution image folder, and reduce the resolution of the super-resolution image.

[0017] Furthermore, the tablet computer will automatically retrieve the super-resolution image of the corresponding size in the super-resolution image folder, and the processing of reducing the resolution of the super-resolution image also includes: using but not limited to intelligent resampling technology, region-aware image compression technology and lossless compression technology to reduce the resolution of the super-resolution image, so that the image resolution is reduced while maintaining the original size, so that a clear image can be viewed on the tablet computer.

[0018] Furthermore, the method of automatically retrieving a super-resolution image in a super-resolution image folder that is closest in size to the image finally adjusted by the user according to the image size finally adjusted by the user includes: retrieving a super-resolution image in a super-resolution image folder that is closest in area to the image finally adjusted by the user; then, zooming in and out correspondingly on the retrieved super-resolution image that is closest in area, accompanied by processes including but not limited to bicubic interpolation, region-aware image compression technology, contrast enhancement, and edge enhancement processing, and adjusting the size of the super-resolution image in the retrieved super-resolution image folder to the same size as the image finally adjusted by the user on the premise that the resolution is reduced to a threshold value of the tablet computer screen resolution; replacing the original image scaled by the user with the image in the adjusted super-resolution image folder and presenting it on the display screen of the tablet computer, so that the user can still obtain a clear image when zooming in and out on the image.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides an image enhancement method for a tablet computer. The method first generates a plurality of high-resolution images of different sizes, and saves the high-resolution images in a super-resolution image folder. When the image is zoomed in or out, the corresponding image in the super-resolution image folder is retrieved, and the image is properly processed to obtain clear images of various sizes. In the process of zooming in or out of the image on the tablet computer, the method replaces the corresponding original image zoomed in or out by the user with the processed super-resolution image to obtain a clear image, thereby achieving the purpose of enhancing the image and facilitating user viewing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 : A flow chart of an image enhancement method for a tablet computer. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given here are only used to illustrate and explain the present invention, and cannot be used to limit the present invention.

[0023] like Figure 1As shown: is a flow chart of an image enhancement method for a tablet computer of the present invention; the flow chart includes the following steps: step S100, acquiring an image through a tablet computer, the image including an image taken by the tablet computer and an image received by other means; the other means include but are not limited to being received by the tablet computer through software and being directly transmitted through a USB device; step S101, using an image super-resolution method to process the image acquired by the tablet computer to obtain a super-resolution image, requiring that the resolution of the obtained super-resolution image is greater than the resolution threshold of the tablet computer screen; step S102, using the method in step S101, according to the size of the tablet computer display screen, generating a plurality of super-resolution images of different sizes; saving the generated multiple super-resolution images of different sizes into a super-resolution image folder; the super-resolution image folder refers to a folder that only saves the generated multiple super-resolution images of different sizes; step S103, when a user needs to view an image that has been saved on the tablet computer, the user clicks on the image, and according to the initial size of the image clicked by the user, the tablet computer will automatically retrieve the super-resolution image of the corresponding size in the super-resolution image folder, and reduce the resolution of the super-resolution image, but save all details of the super-resolution image; the resolution of the image is reduced to the resolution threshold of the tablet computer so that the user can see a clear image; if the user zooms in or out of the image, the super-resolution image in the super-resolution image folder that is closest to the image finally adjusted by the user is automatically retrieved according to the image size finally adjusted by the user, the retrieved super-resolution image is appropriately resized, and accompanied by image enhancement and resolution reduction processing, the size of the super-resolution image in the retrieved super-resolution image folder is adjusted to the same size as the image finally adjusted by the user, and the original image scaled by the user is replaced and presented on the display screen of the tablet computer; step S104, when the user needs to view the image newly received by the tablet computer, the tablet computer will prioritize the newly received image clicked by the user; the priority processing refers to firstly performing the processing of the methods of step S101 and step S102 on the image clicked by the user; after the priority processing is performed on the image clicked by the user, the image clicked by the user is regarded as an image that has been saved on the tablet computer; according to the image size adjusted by the user, the method in step S103 is adopted to obtain the enhanced corresponding image and present it on the display screen of the tablet computer for the user to view.

[0024] Specifically, the method first generates a plurality of high-resolution images of different sizes from the obtained image through an image super-resolution method, and saves the obtained high-resolution images into a super-resolution image folder; when the user zooms in or out when viewing the image, the corresponding image in the super-resolution image folder is retrieved, and the image is appropriately processed to obtain clear images of various sizes.

[0025] Step S100, acquiring images through a tablet computer, wherein the images include images taken by the tablet computer and images received through other methods; the other methods include but are not limited to images received by the tablet computer through software and images directly transmitted through a USB device.

[0026] In the above embodiment, specifically, the acquired images also include images saved in an ordinary folder of the tablet computer, and the ordinary folder refers to a folder other than the super-resolution image folder; after the user acquires the images, there must be a part of the images that have never been opened and viewed, and these images are usually saved directly in ordinary folders by the user. The tablet computer will automatically check whether the images in the ordinary folders are all in the super-resolution image folder; if an image in a certain ordinary folder does not exist in the super-resolution image folder, the image will be processed by an image super-resolution method and saved in the super-resolution image folder.

[0027] Step S101: Using an image super-resolution method to process an image acquired by a tablet computer to obtain a super-resolution image. It is required that the resolution of the obtained super-resolution image is greater than a resolution threshold of a tablet computer screen.

[0028] In the above embodiment, specifically, the image super-resolution method adopted is an image super-resolution method based on a cascaded convolutional neural network. The method completes the super-resolution task through four parts: feature extraction block sFEBs, enhancement block EB, reconstruction block CB and feature refinement block, and restores the details and clarity of the super-resolution image from the low-resolution image.

[0029] In the above embodiment, specifically, the reason why the resolution of the obtained super-resolution image is greater than the resolution threshold of the tablet computer screen is: the image is processed by an image super-resolution method to obtain as many details of the image as possible; so that after the resolution of the super-resolution image is reduced by an appropriate method in the later stage, a clear image can still be obtained, which is conducive to user observation.

[0030] Step S102, using the method in step S101, generating multiple super-resolution images of different sizes according to the size of the tablet computer display screen; saving the generated multiple super-resolution images of different sizes into a super-resolution image folder; the super-resolution image folder refers to a folder that only stores the generated multiple super-resolution images of different sizes.

[0031] In the above embodiment, specifically, the size of the display screen of the tablet computer refers to the length of the length and width of the display screen; the method for generating multiple super-resolution images of different sizes is: according to the length of the length and width of the display screen of the tablet computer, according to the ratio of the length and width, the length and width of the tablet computer are proportionally reduced, and multiple super-resolution images of different sizes are generated as much as possible.

[0032] In the above embodiment, preferably, for example, if the length and width of the tablet computer are 90 cm and 60 cm respectively, if it is selected to reduce the original 1 / 10 each time, the lengths and widths of different sizes generated are: 81 and 54, 72 and 48, 63 and 42, 54 and 36, 45 and 30, 36 and 24, 27 and 18, 18 and 12, and 9 and 6; of course, when generating different sizes, the more the number of lengths and widths of different sizes generated is, the more obvious the effect of the present invention is; because, the more lengths and widths of different sizes are generated, the more super-resolution images of different sizes are generated, and when the user opens the original image later to match the image in the corresponding super-resolution image folder, the size difference between the original image size and the closest image in the super-resolution image folder will likely be smaller, and the later processing will be simpler and the processing effect will be better.

[0033] Step S103, when the user needs to view an image that has been saved on the tablet computer, the user clicks on the image. According to the initial size of the image clicked by the user, the tablet computer will automatically retrieve a super-resolution image of a corresponding size from the super-resolution image folder, and reduce the resolution of the super-resolution image, but save all the details of the super-resolution image; the resolution of the image is reduced to the resolution threshold of the tablet computer so that the user can see a clear image; if the user zooms in or out on the image, according to the image size finally adjusted by the user, the super-resolution image in the super-resolution image folder that is closest to the image finally adjusted by the user is automatically retrieved, the retrieved super-resolution image is appropriately resized, accompanied by image enhancement and resolution reduction processing, the size of the super-resolution image in the retrieved super-resolution image folder is adjusted to the same size as the image finally adjusted by the user, and the original image scaled by the user is replaced and presented on the display screen of the tablet computer.

[0034] In the above embodiment, specifically, in order to satisfy the method of the present invention, the tablet computer needs to set the initial size of the image clicked by the user to be one of the sizes of the corresponding image saved in the super-resolution image folder, preferably a size in the middle of the various sizes of the corresponding image saved in the super-resolution image folder.

[0035] In the above embodiment, specifically, a corresponding script is arranged on the tablet computer so that the tablet computer can automatically retrieve the super-resolution image in the super-resolution image folder and perform resolution reduction processing on the super-resolution image.

[0036] In the above embodiment, preferably, without the need to enlarge or reduce the image, the super-resolution image can be processed by region-aware image compression technology to obtain a clear image of the same size for user viewing.

[0037] In the above embodiment, specifically, in addition to the region-aware image compression technology described above, the image processing may also be accompanied by image processing technologies such as intelligent resampling technology and lossless compression technology to reduce the resolution of the super-resolution image, so that the image resolution is reduced while maintaining the original size, so that a clear image can be viewed on a tablet computer; it should be pointed out that the benefit of the super-resolution image required to be obtained in step S101 being greater than the resolution threshold of the tablet computer screen is reflected here, and the super-resolution image obtained has so many details that after the image resolution is reduced by an appropriate method, the image can still maintain a high clarity, which is convenient for users to view.

[0038] In the above embodiment, specifically, if the user needs to adjust the size of the image for viewing, it may involve enlarging or reducing the image on the tablet computer; the present invention retrieves a super-resolution image in a super-resolution image folder that is closest in area to the image finally adjusted by the user; then, the retrieved super-resolution image with the closest area is correspondingly enlarged or reduced, accompanied by processes including but not limited to bicubic interpolation, region-aware image compression technology, contrast enhancement, and edge enhancement processing, and on the premise of reducing the resolution to the tablet computer screen resolution threshold, the size of the super-resolution image in the retrieved super-resolution image folder is adjusted to the same size as the image finally adjusted by the user; the original image scaled by the user is replaced by the image in the adjusted super-resolution image folder and presented on the display screen of the tablet computer, so that the user can still obtain a clear image when enlarging or reducing the image.

[0039] In the above embodiment, preferably, if the user enlarges the image, the user can first process the closest super-resolution image through bicubic interpolation algorithm, contrast enhancement and edge enhancement processing, etc., to obtain an image of the size required by the user whose resolution is still higher than the tablet computer resolution threshold; then, reduce the image resolution through area-aware image compression technology to obtain a clear image of the size required by the user.

[0040] In the above embodiment, preferably, if the user reduces the image, the user can process the closest super-resolution image by using methods such as bicubic interpolation algorithm and edge enhancement processing to obtain an image of the size required by the user whose resolution is still higher than the resolution threshold of the tablet computer; then, the image resolution is reduced by using region-aware image compression technology to obtain a clear image of the size required by the user;

[0041] In the above embodiment, it should be pointed out that, because the size difference between the super-resolution image in the retrieved super-resolution image folder and the size required by the user is not large, in the process of zooming in or out, even the processing methods such as the bicubic interpolation algorithm and the edge enhancement processing are not required. Without affecting the image quality, only a slight stretching or compression of the pixels is required; subsequently, the clear image required by the user can be obtained by reducing the image resolution through the region-aware image compression technology.

[0042] Step S104, when the user needs to view the newly received image on the tablet computer, the tablet computer will perform priority processing on the newly received image clicked by the user; the priority processing means first performing the processing of the methods of step S101 and step S102 on the image clicked by the user; after the priority processing is performed on the image clicked by the user, the image clicked by the user is regarded as an image that has been saved on the tablet computer; according to the image size adjusted by the user, the method in step S103 is used to obtain the enhanced corresponding image and present it on the display screen of the tablet computer for the user to view.

[0043] In the above embodiment, specifically, for an image newly received by the tablet computer, the tablet computer has not had time to perform relevant processing of the image super-resolution method on the image; therefore, when the user clicks on the newly received image to observe, in order for the user to obtain a clear image when zooming in or out on the image, the present invention sets up a script for priority processing of the newly received image clicked by the user; through the script, the newly received image clicked by the user can be processed by the methods of step S101, step S102 and step S103, so that when the user clicks on the newly received image to zoom in or out on the image, a clear image can still be obtained, thereby achieving the purpose of enhancing the image and facilitating user viewing.

[0044] It should be understood that the above-mentioned embodiments are one or more embodiments of the present invention, and there are many other embodiments and variations thereof based on the present invention; the variations and modifications made by ordinary technicians in this industry through the present invention without making pioneering innovations all fall within the scope of protection of the present invention.

Claims

1. A method for image enhancement of a tablet computer, characterized in that: The method comprises the following steps: 1) Acquiring images through a tablet computer, the images including images taken by the tablet computer and images received through other means; the other means include but are not limited to images received by the tablet computer through software and images directly transmitted through a USB device; 2) Using an image super-resolution method to process the image acquired by the tablet computer to obtain a super-resolution image, and requiring that the resolution of the obtained super-resolution image is greater than the resolution threshold of the tablet computer screen; 3) using the method in 2), generating multiple super-resolution images of different sizes according to the size of the tablet computer display screen; saving the generated multiple super-resolution images of different sizes into a super-resolution image folder; the super-resolution image folder refers to a folder that only stores the generated multiple super-resolution images of different sizes; 4) When the user needs to view an image that has been saved on the tablet computer, the user clicks on the image. According to the initial size of the image clicked by the user, the tablet computer will automatically retrieve a super-resolution image of the corresponding size in the super-resolution image folder, and reduce the resolution of the super-resolution image, but save all the details of the super-resolution image; the resolution of the image is reduced to the resolution threshold of the tablet computer so that the user can see a clear image; if the user zooms in or out on the image, according to the image size finally adjusted by the user, the super-resolution image in the super-resolution image folder that is closest to the image finally adjusted by the user is automatically retrieved, and the retrieved super-resolution image is appropriately resized, accompanied by image enhancement and resolution reduction processing, and the size of the super-resolution image in the retrieved super-resolution image folder is adjusted to the same size as the image finally adjusted by the user, and the original image scaled by the user is replaced and presented on the display screen of the tablet computer; 5) When the user needs to view the newly received image on the tablet computer, the tablet computer will perform priority processing on the newly received image clicked by the user; the priority processing means first performing the processing of steps 2) and 3) on the image clicked by the user; after the priority processing is performed on the image clicked by the user, the image clicked by the user is regarded as an image that has been saved on the tablet computer; according to the image size adjusted by the user, the method in step 4) is used to obtain the enhanced corresponding image and present it on the display screen of the tablet computer for the user to view.

2. The image enhancement method for a tablet computer according to claim 1, characterized in that: The acquiring of images by means of a tablet computer further comprises: the acquired images also include images saved in a common folder of the tablet computer, wherein the common folder refers to a folder other than a super-resolution image folder.

3. The image enhancement method for a tablet computer according to claim 1, characterized in that: The image super-resolution method includes: the image super-resolution method adopted is an image super-resolution method established based on a cascaded convolutional neural network, the method completes the super-resolution task through four parts: a feature extraction block sFEBs, an enhancement block EB, a reconstruction block CB and a feature refinement block, and restores the details and clarity of a super-resolution image from a low-resolution image.

4. The image enhancement method for a tablet computer according to claim 1, characterized in that: The resolution of the obtained super-resolution image is greater than the resolution threshold of the tablet computer screen, including: the reason why the resolution of the obtained super-resolution image is greater than the resolution threshold of the tablet computer screen is that when an appropriate method is used to reduce the resolution of the super-resolution image in a later stage, a clear image can still be obtained.

5. The image enhancement method for a tablet computer according to claim 1, characterized in that: The method of generating multiple super-resolution images of different sizes according to the size of the tablet computer display screen includes: the size of the tablet computer display screen refers to the length of the length and width of the display screen; the method of generating multiple super-resolution images of different sizes is: according to the length of the length and width of the tablet computer display screen, according to the ratio of the length and width, the length and width of the tablet computer are proportionally reduced, and multiple super-resolution images of different sizes are generated as much as possible.

6. The image enhancement method for a tablet computer according to claim 1, characterized in that: The initial size of the image clicked by the user includes: the tablet computer needs to set the initial size of the image clicked by the user to be one of the sizes of the corresponding image stored in the super-resolution image folder.

7. The image enhancement method for a tablet computer according to claim 1, characterized in that: The tablet computer automatically retrieves a super-resolution image of a corresponding size from the super-resolution image folder and performs resolution reduction processing on the super-resolution image, including: arranging a corresponding script on the tablet computer to enable the tablet computer to automatically retrieve the super-resolution image from the super-resolution image folder and perform resolution reduction processing on the super-resolution image.

8. The image enhancement method for a tablet computer according to claim 1, characterized in that: The tablet computer will automatically retrieve the super-resolution image of the corresponding size in the super-resolution image folder, and the processing of reducing the resolution of the super-resolution image also includes: using including but not limited to intelligent resampling technology, region-aware image compression technology and lossless compression technology to reduce the resolution of the super-resolution image, so that the image resolution is reduced while maintaining the original size, so that a clear image can be viewed on the tablet computer.

9. The image enhancement method for a tablet computer according to claim 1, characterized in that: The method of automatically retrieving a super-resolution image in a super-resolution image folder that is closest in size to the image finally adjusted by the user according to the image size finally adjusted by the user includes: retrieving a super-resolution image in a super-resolution image folder that is closest in area to the image finally adjusted by the user; then, zooming in and out the retrieved super-resolution image that is closest in area, accompanied by processing including but not limited to bicubic interpolation, region-aware image compression technology, contrast enhancement and edge enhancement, and adjusting the size of the super-resolution image in the retrieved super-resolution image folder to the same size as the image finally adjusted by the user on the premise that the resolution is reduced to the threshold of the tablet computer screen resolution; replacing the original image scaled by the user with the image in the adjusted super-resolution image folder and presenting it on the display screen of the tablet computer, so that the user can still obtain a clear image when zooming in and out on the image.

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