CN116319638A - Method and device for sending picture message in encrypted instant messaging system - Google Patents
Method and device for sending picture message in encrypted instant messaging system Download PDFInfo
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Abstract
The present disclosure provides a method for sending a picture message in an encrypted instant messaging system, which is executed by a sending end and includes: determining respective sizes of a second picture to be generated for message guidance and a third picture for picture preview based on an aspect ratio of a first picture as a transmission target of a picture message, wherein the size of the second picture is smaller than the size of the third picture; compressing the first picture based on the respective sizes of the second picture and the third picture to generate the second picture and the third picture, respectively; and sending the second picture and the third picture to a server so that a receiving end downloads the second picture and/or the third picture from the server. The present disclosure also relates to an apparatus for transmitting a picture message in an encrypted instant messaging system and a computer-readable storage medium.
Description
Technical Field
The present disclosure relates to the field of instant messaging technologies, and in particular, to a method and an apparatus for sending a picture message in an encrypted instant messaging system.
Background
Instant messaging (Instant messaging, IM) refers to a service capable of sending and receiving internet messages and the like in real time, and capable of allowing two or more people to transmit text, pictures, voice, video and the like in real time using a network. Instant messaging, which is shorter than the time required to transmit e-mail and more convenient than telephone, is the most popular way of communication at the present time.
Users often want to protect their privacy and security when using instant messaging services. In order to meet this demand of users, encrypted instant messaging systems have emerged.
Fig. 1 is a schematic diagram of an encrypted instant messaging system. As shown in fig. 1, in the encrypted instant messaging system, a client as a transmitting end may encrypt information to be transmitted and transmit the information to a server. The server stores the ciphertext transmitted by the sender, and then the client serving as the receiver can acquire the ciphertext from the server, decrypt the ciphertext, and display the decrypted content to the user. In the process, the server side does not sense the content of the transmitted information, so that the encryption instant messaging system can effectively guarantee the privacy security of the client.
Disclosure of Invention
It is an object of one or more embodiments of the present disclosure to provide a method, apparatus, and computer-readable storage medium for transmitting a picture message in an encrypted instant messaging system.
According to a first aspect of embodiments of the present disclosure, there is provided a method for transmitting a picture message in an encrypted instant messaging system, performed by a transmitting end, including: determining respective sizes of a second picture to be generated for message guidance and a third picture for picture preview based on an aspect ratio of a first picture as a transmission target of a picture message, wherein the size of the second picture is smaller than the size of the third picture; compressing the first picture based on the respective sizes of the second picture and the third picture to generate the second picture and the third picture, respectively; and sending the second picture and the third picture to a server so that a receiving end downloads the second picture and/or the third picture from the server.
In some embodiments, determining the size of each of the second picture and the third picture based on the aspect ratio comprises: determining that the length of the long side of the second picture is a first pixel number in response to the aspect ratio conforming to a preset range, determining that the length of the short side of the second picture is a third pixel number in response to the aspect ratio conforming to the preset range, and determining that the length of the short side of the third picture is a third pixel number in response to the aspect ratio of the first picture and the first pixel number, and determining that the length of the long side of the third picture is a length of the long side of the third picture in response to the aspect ratio of the first picture and the third pixel number; and determining that the short side length of the second picture is a second pixel number, determining that the long side length of the second picture is a fourth pixel number based on the aspect ratio of the first picture and the second pixel number, and determining that the short side length of the third picture is a fourth pixel number based on the aspect ratio of the first picture and the fourth pixel number.
In some embodiments, the preset range is greater than or equal to 1:3 and less than or equal to 3:1.
in some embodiments, the first number of pixels is greater than or equal to 300 pixels and less than or equal to 600 pixels, and the second number of pixels is greater than or equal to 100 pixels and less than or equal to 300 pixels; the third pixel count is greater than or equal to 800 pixels and less than or equal to 2000 pixels; and/or the fourth number of pixels is greater than or equal to 400 pixels and less than or equal to 800 pixels; preferably, the first number of pixels is 300 pixels and/or the second number of pixels is 160 pixels.
In some embodiments, the method further comprises: the size of the third picture is determined based on the aspect ratio and a first compression condition, the first compression condition including whether to send the first picture.
In some embodiments, determining the size of the third picture based on the aspect ratio and the first compression condition comprises: responding to the aspect ratio meeting the preset range, wherein the first compression condition comprises not sending a first picture, determining that the short side length of the third picture is a fifth pixel number, and determining the long side length of the third picture based on the aspect ratio of the first picture and the fifth pixel number; responding to the aspect ratio meeting the preset range, wherein the first compression condition comprises the steps of sending a first picture, determining that the short side length of the third picture is a sixth pixel number, and determining the long side length of the third picture based on the aspect ratio of the first picture and the sixth pixel number; in response to the aspect ratio not conforming to the preset range, and the first compression condition includes not sending a first picture, determining that a short side length of the third picture is a seventh pixel number, and determining a long side length of the third picture based on the aspect ratio of the first picture and the seventh pixel number; and/or in response to the aspect ratio not conforming to the preset range, the first compression condition includes sending a first picture, determining that the short side length of the third picture is an eighth pixel number, and determining the long side length of the third picture based on the aspect ratio of the first picture and the eighth pixel number.
In some embodiments, the fifth number of pixels is 1280 pixels; the sixth pixel number is 800 pixels or 1280 pixels; the seventh pixel number is 600 pixels; and/or the eighth pixel count is 400 pixels or 600 pixels.
In some embodiments, the method further comprises determining a sixth pixel number and/or a value of the eighth pixel number based on a second compression condition prior to determining the size of the third picture, the second compression condition comprising picture quality priority or transmission efficiency priority, the value of the sixth pixel number comprising a first value and a second value, the value of the eighth pixel number comprising a third value and a fourth value, the first value and the second value being unequal, the third value and the fourth value being unequal; the value of the sixth pixel number is the larger one of the first value and the second value in response to the second compression condition including picture quality priority, and the value of the sixth pixel number is the smaller one of the first value and the second value in response to the second compression condition including transmission efficiency priority; and/or the value of the eighth pixel number is the larger one of the third value and the fourth value in response to the second compression condition including picture quality priority, and the value of the sixth pixel number is the smaller one of the third value and the fourth value in response to the second compression condition including transmission efficiency priority.
In some embodiments, the first value is 800 pixels, the second value is 1280 pixels, the third value is 400 pixels, and the fourth value is 600 pixels.
In some embodiments, the method further comprises: compressing the first picture based on a preset compression mode to generate the second picture and the third picture respectively, including: responding to the compression mode as a first compression mode, performing first quality compression on the first picture so that the quality of the second picture and the quality of the first picture form a first preset proportion, and the quality of the third picture and the quality of the first picture form a second preset proportion; and responding to the compression mode being a second compression mode, performing N times of second quality compression on the first picture to enable the picture memory size of the second picture to conform to a fourth preset range, or performing M times of second quality compression on the first picture to enable the picture memory size of the third picture to conform to a fifth preset range, wherein each time of second quality compression enables the quality of the compressed picture to be in a third preset proportion with the quality of the picture before compression, and N and M are integers.
In some embodiments, the first preset ratio is 40%, the second preset ratio is 30%, and/or the third preset ratio is 90%.
In some embodiments, the method further comprises: before the second picture and the third picture are sent, the picture format of the second picture and/or the third picture is converted into a preset format in response to the picture format of the second picture and/or the third picture being different from the preset format.
In some embodiments, the preset format is a JPG format, a JPEG format, and/or a PNG format.
In some embodiments, the method further comprises: and encrypting the second picture and the third picture before sending the second picture and the third picture.
In some embodiments, the method further comprises: and sending the first picture to the server so that a receiving end downloads the first picture from the server.
In some embodiments, the method further comprises: the first picture is encrypted before being sent.
According to a second aspect of the embodiments of the present disclosure, there is provided an apparatus for transmitting a picture message in an encrypted instant messaging system, including: a determining module configured to determine respective sizes of a second picture to be generated for message guidance and a third picture for picture preview based on an aspect ratio of a first picture as a transmission target of a picture message, wherein the size of the second picture is smaller than the size of the third picture; a compression module configured to compress the first picture based on respective sizes of the second picture and the third picture to generate the second picture and the third picture, respectively; and a sending module configured to send the second picture and the third picture to a server, so that a receiving end downloads the second picture and/or the third picture from the server.
According to a third aspect of the embodiments of the present disclosure, there is provided an apparatus for transmitting a picture message in an encrypted instant messaging system, including: a memory; and a processor coupled to the memory, the processor configured to perform the method of any of the embodiments described above based on instructions stored in the memory.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium comprising computer program instructions, wherein the computer program instructions, when executed by a processor, implement the method according to any one of the embodiments described above.
According to a fifth aspect of embodiments of the present disclosure, there is provided a computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements the method according to any one of the embodiments described above.
The technical scheme of the present disclosure is described in further detail below through the accompanying drawings and examples.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a schematic diagram of an encrypted instant messaging system.
Fig. 2 is a schematic diagram of a first interactive page of an encrypted instant messaging system according to some embodiments of the present disclosure.
Fig. 3 is a second interactive page diagram of an encrypted instant messaging system according to some embodiments of the present disclosure.
Fig. 4 is a flow chart of a method of sending a picture message in an encrypted instant messaging system according to some embodiments of the present disclosure.
Fig. 5 is a schematic structural diagram of an apparatus for transmitting a picture message in an encrypted instant messaging system according to some embodiments of the present disclosure.
Fig. 6 is a schematic structural view of an apparatus for transmitting a picture message in an encrypted instant messaging system according to still further embodiments of the present disclosure.
Detailed Description
The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments in this disclosure without inventive faculty, are intended to fall within the scope of this disclosure.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the non-encrypted instant messaging system, a picture message sent by a client as a sending end is compressed and stored by a server so as to be acquired from the server by the client as a receiving end. However, in the encrypted instant messaging system, the server side cannot perform the process of picture compression because the server side does not perceive the content of the transmitted information. In order to ensure the user experience of the receiving end in the encrypted instant messaging system and reduce the delay of receiving the picture message, the picture in the picture message still needs to be compressed. The inventors of the present application consider that compressing pictures in a picture message at the sender of the picture message to generate "thumbnails" for message guidance and "large figures" for picture preview is a suitable solution. In addition, the inventor further notes that if the client side serving as the transmitting end does not reasonably compress the picture, the problems of low picture transmitting efficiency, poor picture display quality and the like of the encrypted instant messaging system are caused. The inventors then propose the technical solution of the present disclosure.
In an instant messaging system, after a sending end sends a first picture as a transmission target of a picture message, a receiving end often needs to display a thumbnail of the first picture (also called a "second picture") to a user for prompting or guiding the picture message. In response to the user of the receiving end clicking on the picture message, the receiving end typically needs to present to the user a large picture of the first picture (also referred to as a "third picture"). In response to a specific operation by a user of the receiving end, such as clicking on "view artwork", the receiving end typically needs to present the artwork of the first picture (sometimes referred to herein as "first picture" as well) to the user.
The thumbnail is, for example, a second picture 221 for message guidance (where the pictures 221-1 to 221-4 may be collectively referred to as a picture 221 without distinction) located in the chat content display frame 220 shown in fig. 2, which will be described later, and is generally of a smaller size and resolution so that the receiving end receives the thumbnail quickly, guides the picture message in the form of a presentation thumbnail, and so that the user can more quickly understand the main content of the picture. If the user wants to further understand the content of the thumbnail, the user may also be presented with a large map and/or artwork. A large illustration, such as the third picture 310 for picture preview shown in fig. 3, described below, is typically larger in size and higher in resolution than the thumbnail, but still has a lower resolution than the original of the first picture. The original, i.e., the first picture that is the transmission target of the picture message, is generally larger than the size of the thumbnail and higher in resolution than the large picture. It should be understood that when a user at the transmitting end transmits a picture, it may generally be selected whether to transmit the original picture, and in the case that the user at the transmitting end selects to transmit the original picture, the user at the receiving end may receive the original picture. In the case that the user of the transmitting end chooses not to transmit the original image, the receiving end cannot receive the original image.
The thumbnail and large images are typically compressed from the first picture. In the non-encrypted instant messaging system, since the server side can sense the message content, the user only needs to upload the first picture at the sending end, the server side can process the picture to obtain pictures such as a thumbnail and a large picture, and then send the thumbnail to the receiving end, and store the large picture and the original picture, for example, on a file transfer protocol (File Transfer Protocol, FTP) server at the server side. The receiving end receives the thumbnail and displays the thumbnail to the user, and downloads the corresponding large drawing or original drawing from the FTP server in response to the specific operation of the user. However, in the encrypted instant messaging, the server cannot perceive the content of the message and cannot process the picture, so that the sending end can only compress the picture to generate the thumbnail and the large picture, and both the thumbnail and the large picture are sent to the server. And under the condition that the user selects to send the original image, the sending end sends the original image to the service end. The server sends the thumbnail to the receiving end and stores the large image and the original image. And the receiving terminal receives the thumbnail and displays the thumbnail to the user, and downloads the corresponding large drawing or original drawing from the service terminal in response to the specific operation of the user.
At present, when a transmitting end compresses pictures, all the pictures adopt the same compression mode, so that the compressed pictures have large memory, further the transmission efficiency of the pictures is affected, the pictures are not clear, the quality of the pictures is low, and the use experience of a user is affected.
Fig. 2 is a schematic diagram of a first interactive page of an encrypted instant messaging system according to some embodiments of the present disclosure. Fig. 3 is a second interactive page diagram of an encrypted instant messaging system according to some embodiments of the present disclosure. Fig. 4 is a flow chart of a method of sending a picture message in an encrypted instant messaging system according to some embodiments of the present disclosure. The method shown in fig. 4 may be performed by an application program, such as instant messaging software, installed on an electronic device, such as a computer, a mobile phone, etc., to provide a function of transmitting a picture message to a user. The method may include step S410, step S420, and step S430 as described below.
As shown in fig. 2, the first interactive page 20 of the encrypted instant messaging system may include a chat information field 210, a chat content display box 220, and a chat content input box 230. Chat information field 210 may, for example, present an avatar and nickname of the chat object and an operating button associated with the chat object or chat setting. The chat object information field 210 may also present a word of "encrypted chat" to inform the user that the user is currently in an encrypted chat state. The user can operate the chat content input box 230 to send text, pictures, emoticons, voice, and the like. Chat content display box 220 may be used to present chat information for the user, for example, a thumbnail of a picture in each picture message, i.e., a second picture 221 for message guidance. In some embodiments, chat content display box 220 may also present status information as to whether the information was withdrawn successfully, whether the information was sent successfully, and the like.
It will be appreciated by those skilled in the art that while the first interactive page 20 shown in fig. 2 is typically a page presented by instant messaging software on a client that is the sender, it is useful for purposes of illustration to understand interactive pages presented by instant messaging software on a client that is the receiver. For example, as shown in fig. 2, a user at the transmitting end may sequentially send out four picture messages, each of which is guided by thumbnails 221-1 to 221-4 of pictures of its transmission targets, so as to indicate the approximate content of each picture message to the transmitting user. On the interactive page with the user of the receiving end, the thumbnails 221-1 to 221-4 of the pictures of the transmission targets of the respective messages may be sequentially presented in accordance with the receiving order of the four picture messages by the receiving end (may be the same as the transmission order but may be different from the transmission order if a certain message has a transmission delay), so as to indicate the approximate content of each picture message to the receiving user.
In some embodiments, in response to a user of the receiving end operating on the second picture for message guidance, for example clicking on a thumbnail of a particular picture message, the user may be presented with a second interactive page 30 of the encrypted instant messaging system as shown in fig. 3. The second interactive page 30 of the encrypted instant messaging system may include a third picture 310 for a picture preview, a view artwork button 320, an operation button 330 for displaying a history picture in a chat log, and a button 340 for downloading the second picture.
The method for sending the picture message in the encrypted instant messaging system provided by the application is described below with reference to the interactive pages of the encrypted instant messaging system shown in fig. 2 and 3. As shown in fig. 4, in step S410, the size of each of the second picture for message guidance and the third picture for picture preview to be generated is determined based on the aspect ratio of the first picture as the transmission target of the picture message. Here, the size of the second picture is smaller than the size of the third picture.
In some embodiments, the aspect ratio of the first picture may be determined based on the resolution of the first picture. For example, if the resolution of the first picture is 1280 (horizontal pixels) ×960 (vertical pixels), the aspect ratio of the first picture may be determined to be 4:3. How the size of the second picture and the size of the third picture are determined based on the aspect ratio of the first picture will be further described below in connection with some embodiments.
In step S420, the first picture is compressed based on the respective sizes of the second picture and the third picture to generate the second picture and the third picture, respectively. For example, after determining that the size of the second picture is 100 (horizontal pixels) ×120 (vertical pixels), the first picture may be compressed using a related compression algorithm, thereby generating a second picture having a size of 160 (horizontal pixels) ×120 (vertical pixels).
In step S430, the second picture and the third picture are sent to the server, so that the receiving end downloads the second picture and/or the third picture from the server. For example, the sending end may send the second picture and the third picture to the server respectively, and the receiving end may download the second picture from the server first, so as to display the second picture to the user. The third picture may then be downloaded from the server in response to a specific operation by the user, and then presented to the user.
In the above embodiment, the sending end determines the sizes of the second picture and the third picture based on the aspect ratio of the first picture, so that the characteristics of the first picture can be fully considered when the first picture is compressed, and the sizes of the second picture and the third picture obtained by compression are more reasonable, which is beneficial to balancing the transmission efficiency of the picture and the picture quality of the encrypted instant messaging system.
In some embodiments, determining the size of each of the second picture and the third picture based on the aspect ratio of the first picture is, for example: if the aspect ratio of the first picture is 3:2, determining that the long side size of the second picture is 300 pixels and the short side size is 200 pixels; the long side size of the third picture is 1200 pixels and the short side size is 800 pixels.
In some embodiments, determining the size of each of the second picture and the third picture based on the aspect ratio of the first picture comprises: determining that the length of the long side of the second picture is the first pixel number, determining that the length of the short side of the second picture is the third pixel number based on the length-width ratio of the first picture and the first pixel number, and determining that the length of the short side of the third picture is the third pixel number based on the length-width ratio of the first picture and the third pixel number; and determining the short side length of the second picture as the second pixel number, determining the long side length of the second picture based on the length-width ratio of the first picture and the second pixel number, determining the short side length of the third picture as the fourth pixel number, and determining the long side length of the third picture based on the length-width ratio of the first picture and the fourth pixel number in response to the length-width ratio not conforming to the preset range.
As some implementations, determining the short side length of the second picture based on the aspect ratio of the first picture and the first number of pixels (i.e., the long side length of the second picture) may be the following process: and recording the length-width ratio A to B of the first picture, wherein the length of the long side of the second picture is C, and the length D=B multiplied by C/A of the short side of the second picture. The method for calculating the dimensions may also be used to determine the length of the long side of the second picture based on the aspect ratio of the first picture and the length of the short side of the second picture, determine the length of the long side of the third picture based on the aspect ratio of the first picture and the length of the long side of the third picture, and determine the length of the short side of the third picture based on the aspect ratio of the first picture and the length of the long side of the third picture, which will not be described again here. The size calculation method can ensure that the length-width ratio of the second picture and the third picture is consistent with that of the first picture, namely, the sizes of the second picture and the third picture are obtained by integrally reducing the size of the first picture according to a certain proportion, so that the second picture and the third picture cannot deform, and the use experience of a user at a receiving end is guaranteed.
In some embodiments, the preset range may be set, so that the aspect ratio accords with the preset range and may indicate that the length and the width of the first picture are relatively similar, and that the aspect ratio does not accord with the preset range and may indicate that the length and the width of the first picture are relatively different. For example, the preset range may be greater than or equal to 1:3 and less than or equal to 3:1. for example, if the aspect ratio of the first picture is 1:1, the aspect ratio of the first picture can be considered to accord with a preset range; if the aspect ratio of the first picture is 5:1, the aspect ratio of the first picture may not be considered to conform to the preset range.
In the above embodiment, in the manner of determining the length of the long side of the second picture in response to the aspect ratio of the first picture conforming to the preset range, the length of the long side of the second picture is limited, which is beneficial to ensuring that the overall size of the second picture is smaller because the second picture is generally set smaller; in addition, because the length and the width of the first picture are relatively close, the short side of the second picture is not too small, namely the size of the second picture is in a relatively proper range, and the transmission efficiency and the use experience are both facilitated. In the manner of determining the length of the short side of the third picture in response to the aspect ratio of the first picture conforming to the preset range, the size of the third picture is not required to be small, and by determining the length of the short side of the third picture, it is beneficial to ensure that the short side of the third picture is not too small, and because the length and the width of the first picture are relatively close, the long side of the third picture is not too large, that is, the size of the third picture is in a relatively suitable range, which is beneficial to achieving balance between improving performance and ensuring use experience of users. In the manner of determining the short side lengths of the second picture and the third picture in response to the fact that the aspect ratio does not accord with the preset range, the fact that the length and the width of the first picture are large is indicated by the fact that the aspect ratio does not accord with the preset range, in this case, if the size of the long side size is set, the short side is likely to be too small, and therefore a user cannot see the second picture and the third picture clearly, and accordingly the fact that the aspect ratio does not accord with the preset range is achieved, the size of the short side can ensure that the second picture and the third picture are not too small, and user experience can be guaranteed.
As some implementations, the first number of pixels is greater than or equal to 300 pixels and less than or equal to 600 pixels, and the second number of pixels is greater than or equal to 100 pixels and less than or equal to 300 pixels; the third pixel number is greater than or equal to 800 pixels and less than or equal to 2000 pixels; and/or the fourth pixel number is greater than or equal to 400 pixels and less than or equal to 800 pixels. Preferably, the first number of pixels is 300 pixels and/or the second number of pixels is 160 pixels.
For example, in response to the aspect ratio of the first picture conforming to greater than or equal to 1:3 and less than or equal to 3:1, the long side length of the second picture may be determined to be 300 pixels, and the short side length of the second picture may be determined based on the aspect ratio of the first picture and the long side length of the second picture. The display effect of the thumbnail thus generated may refer to the second pictures 221-1 and 221-2 shown in fig. 2. In response to the aspect ratio of the first picture conforming to greater than or equal to 1:3 and less than or equal to 3:1, the short side length of the third picture may be determined to be 1280 pixels, and the long side length of the third picture may be determined based on the aspect ratio of the first picture and the short side length of the third picture. In response to the aspect ratio of the first picture being less than 1:3 or greater than 3:1, the short side length of the second picture may be determined to be 160 pixels, and the long side length of the second picture may be determined based on the aspect ratio of the first picture and the short side length of the second picture. The display effect of the thumbnail thus generated may refer to the second pictures 221-3 and 221-4 shown in fig. 2. In response to the aspect ratio of the first picture being less than 1:3 or greater than 3:1, the short side length of the third picture may be determined to be 400 pixels, and the long side length of the third picture may be determined based on the aspect ratio of the first picture and the short side length of the third picture.
In some embodiments, the size of the third picture may be determined based on the aspect ratio and a first compression condition, the first compression condition including whether to send the first picture, i.e., whether to send the artwork. For example, in the case of transmitting the first picture, since the user of the receiving end can view the first picture, the size of the third picture for picture preview can be set smaller to improve performance; under the condition that the first picture is not sent, the user at the receiving end cannot see the first picture, and the third picture is the clearest picture which the user can see, so that the size of the third picture can be set larger to ensure the use experience of the user. Therefore, based on the length-width ratio and whether the first picture is sent or not, the size determination of the third picture is more reasonable, and the encryption instant messaging system is better balanced in performance and picture quality.
As some implementations, determining the size of the third picture based on the aspect ratio and the first compression condition includes: responding to the condition that the length-to-width ratio accords with a preset range, wherein the first compression condition comprises not sending the first picture, determining that the short side length of the third picture is the fifth pixel number, and determining the long side length of the third picture based on the length-to-width ratio of the first picture and the fifth pixel number; responding to the aspect ratio meeting a preset range, wherein the first compression condition comprises the steps of sending a first picture, determining the short side length of a third picture as a sixth pixel number, and determining the long side length of the third picture based on the aspect ratio of the first picture and the sixth pixel number; in response to the aspect ratio not conforming to the preset range, and the first compression condition comprises not sending the first picture, determining that the short side length of the third picture is the seventh pixel number, and determining the long side length of the third picture based on the aspect ratio of the first picture and the seventh pixel number; and/or in response to the aspect ratio not conforming to the preset range, the first compression condition comprises sending the first picture, determining that the short side length of the third picture is the eighth pixel number, and determining the long side length of the third picture based on the aspect ratio of the first picture and the eighth pixel number.
For example, the fifth pixel number may be 1280 pixels; the sixth pixel number may be 800 pixels or 1280 pixels; the seventh pixel number may be 600 pixels; and/or the eighth pixel count may be 400 pixels or 600 pixels.
How the value of the sixth pixel number and/or the eighth pixel number is determined is described below in connection with some embodiments. In some embodiments, before determining the size of the third picture, the value of the sixth pixel number and/or the eighth pixel number may be determined based on a second compression condition, the second compression condition including picture quality priority or transmission efficiency priority. The second compression condition may be determined, for example, according to a user's setting. The sixth pixel number includes a first value and a second value, the eighth pixel number includes a third value and a fourth value, the first value and the second value are unequal, and the third value and the fourth value are unequal.
And responding to the second compression condition comprising the picture quality priority, wherein the value of the sixth pixel number is the larger one of the first value and the second value, so that the size of the third picture is larger, and the picture quality of the third picture received by the user is better. And responding to the second compression condition comprising the priority of the sending efficiency, wherein the value of the sixth pixel number is the smaller one of the first value and the second value, so that the memory of the third picture is smaller, and the efficiency of sending the third picture is higher. And responding to the second compression condition comprising the picture quality priority, wherein the value of the eighth pixel number is the larger one of the third value and the fourth value, which is beneficial to guaranteeing the picture quality of the third picture. And responding to the second compression condition comprising the priority of the transmission efficiency, wherein the value of the sixth pixel number is the smaller one of the third value and the fourth value, so that the size of the third picture is smaller, and the transmission efficiency is improved. The embodiment comprehensively considers the aspect ratio, whether to send the original image, the picture quality and the sending efficiency, is beneficial to the encryption instant messaging system to obtain better balance between the performance and the picture quality, and improves the user experience better.
As some implementations, the first value is 800 pixels, the second value is 1280 pixels, the third value is 400 pixels, and the fourth value is 600 pixels.
The above embodiments describe how to determine the size of the second picture and the third picture and compress the first picture based on the determined size to obtain the second picture and the third picture. In some embodiments, not only the first picture is to be size-compressed according to size, but also the first picture needs to be quality-compressed according to compression quality, so as to obtain the second picture and the third picture. It should be appreciated that quality compression does not change the size of the picture, but may change the memory size of the picture. For example, the memory size of the first picture is 2M, after quality compression, the memory size of the second picture may be 7K, and the content size of the third picture may be 52K.
In some embodiments, the compressing the first picture based on the preset compression manner to generate the second picture and the third picture respectively may have the following two ways: and in response to the compression mode being the first compression mode, performing first quality compression on the first picture so that the quality of the second picture and the quality of the first picture form a first preset proportion, and the quality of the third picture and the quality of the first picture form a second preset proportion, so that the compression efficiency is higher. And responding to the compression mode as a second compression mode, performing N times of second quality compression on the first picture to enable the picture memory size of the second picture to conform to a fourth preset range, or performing M times of second quality compression on the first picture to enable the picture memory size of the third picture to conform to a fifth preset range. Here, the quality of the compressed picture and the quality of the picture before compression form a third preset ratio by the second quality compression each time, N and M are integers, and the picture quality of the second picture and the third picture quality is better by the compression mode from the preset ratio to the preset range.
As some implementations, the first preset ratio is 40%, the second preset ratio is 30%, and/or the third preset ratio is 90%.
In some embodiments, before sending the second picture and the third picture, the picture format of the second picture and/or the third picture is converted to a preset format in response to the picture format of the second picture and/or the third picture being different from the preset format.
The preset format is, for example, JPG format. Because the JPG format has good application rate and compatibility, the second picture and/or the third picture are converted into the JPG format, which is beneficial to guaranteeing the use experience of users. For another example, the preset format may be a JPEG format and/or a PNG format.
In some embodiments, the second picture and the third picture are encrypted before the second picture and the third picture are sent. As some implementations, the second picture and the third picture may be encrypted separately, and the encrypted second picture and the encrypted third picture may be sent to the server separately. The encryption operation is performed respectively, so that privacy security is protected better, and the risk that the second picture and the third picture are simultaneously decoded is avoided.
In some embodiments, the first picture may also be sent to the server so that the receiving end downloads the first picture from the server. As some implementations, whether to send the first picture to the server may be determined in response to a specific operation of the user (for example, an operation of a button for sending the original picture), and in a case where the user selects to send the original picture, the sending end may send the first picture to the server, and the receiving end may also select whether to download the first picture. For example, the user at the receiving end may see the page as shown in fig. 3, and operate the view original button 320 to download the first picture.
In some embodiments, the first picture may be encrypted prior to transmission of the first picture. Thus, the safety and privacy of the transmission of the first picture can be guaranteed.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, so that the same or similar parts between the embodiments are mutually referred to. For the device embodiments, since they basically correspond to the method embodiments, the description is relatively simple, and the relevant points are referred to in the description of the method embodiments.
Fig. 5 is a schematic structural diagram of an apparatus for transmitting a picture message in an encrypted instant messaging system according to some embodiments of the present disclosure.
As shown in fig. 5, an apparatus 500 for transmitting a picture message in an encrypted instant messaging system includes a determining module 510, a compressing module 520, and a transmitting module.
The determining module 510 is configured to determine, based on an aspect ratio of a first picture that is a transmission target of a picture message, respective sizes of a second picture to be generated for message guidance and a third picture for picture preview, wherein the size of the second picture is smaller than the size of the third picture.
The compression module 520 is configured to compress the first picture based on the respective sizes of the second picture and the third picture to generate the second picture and the third picture, respectively.
The sending module 530 is configured to send the second picture and the third picture to the server, so that the receiving end downloads the second picture and/or the third picture from the server.
Fig. 6 is a schematic structural view of an apparatus for transmitting a picture message in an encrypted instant messaging system according to still further embodiments of the present disclosure.
As shown in fig. 6, an apparatus 600 for transmitting a picture message in an encrypted instant messaging system includes a memory 610 and a processor 620 coupled to the memory 610, the processor 620 being configured to perform the method of any of the foregoing embodiments based on instructions stored in the memory 610.
The memory 610 may include, for example, system memory, fixed nonvolatile storage media, and the like. The system memory may store, for example, an operating system, application programs, boot Loader (Boot Loader), and other programs.
The apparatus 600 for transmitting a picture message in an encrypted instant messaging system may further include an input/output interface 630, a network interface 640, a storage interface 650, and the like. These interfaces 630, 640, 650, and between the memory 610 and the processor 620 may be connected, for example, by a bus 660. The input/output interface 630 provides a connection interface for input/output devices such as a display, mouse, keyboard, touch screen, etc. Network interface 640 provides a connection interface for various networking devices. The storage interface 650 provides a connection interface for external storage devices such as SD cards, U-discs, and the like.
The disclosed embodiments also provide a computer readable storage medium comprising computer program instructions which, when executed by a processor, implement the method of any of the above embodiments.
The disclosed embodiments also provide a computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements the method of any of the above.
Thus, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
It will be appreciated by those skilled in the art that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that functions specified in one or more of the flowcharts and/or one or more of the blocks in the block diagrams may be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (20)
1. A method for transmitting a picture message in an encrypted instant messaging system, performed by a transmitting end, comprising:
determining respective sizes of a second picture to be generated for message guidance and a third picture for picture preview based on an aspect ratio of a first picture as a transmission target of a picture message, wherein the size of the second picture is smaller than the size of the third picture;
Compressing the first picture based on the respective sizes of the second picture and the third picture to generate the second picture and the third picture, respectively; and
and sending the second picture and the third picture to a server so that a receiving end downloads the second picture and/or the third picture from the server.
2. The method of claim 1, wherein determining the respective sizes of the second picture and the third picture based on the aspect ratio comprises:
determining that the length of the long side of the second picture is a first pixel number in response to the aspect ratio conforming to a preset range, determining that the length of the short side of the second picture is a third pixel number in response to the aspect ratio conforming to the preset range, and determining that the length of the short side of the third picture is a third pixel number in response to the aspect ratio of the first picture and the first pixel number, and determining that the length of the long side of the third picture is a length of the long side of the third picture in response to the aspect ratio of the first picture and the third pixel number;
and determining that the short side length of the second picture is a second pixel number, determining that the long side length of the second picture is a fourth pixel number based on the aspect ratio of the first picture and the second pixel number, and determining that the short side length of the third picture is a fourth pixel number based on the aspect ratio of the first picture and the fourth pixel number.
3. The method of claim 2, wherein,
the preset range is greater than or equal to 1:3 and less than or equal to 3:1.
4. the method of claim 2, wherein,
the first number of pixels is greater than or equal to 300 pixels and less than or equal to 600 pixels,
the second pixel number is greater than or equal to 100 pixels and less than or equal to 300 pixels;
the third pixel count is greater than or equal to 800 pixels and less than or equal to 2000 pixels; and/or
The fourth pixel number is greater than or equal to 400 pixels and less than or equal to 800 pixels;
preferably, the first number of pixels is 300 pixels and/or the second number of pixels is 160 pixels.
5. The method of claim 1, further comprising:
the size of the third picture is determined based on the aspect ratio and a first compression condition, the first compression condition including whether to send the first picture.
6. The method of claim 5, wherein determining the size of the third picture based on the aspect ratio and the first compression condition comprises:
responding to the aspect ratio meeting the preset range, wherein the first compression condition comprises not sending a first picture, determining that the short side length of the third picture is a fifth pixel number, and determining the long side length of the third picture based on the aspect ratio of the first picture and the fifth pixel number;
Responding to the aspect ratio meeting the preset range, wherein the first compression condition comprises the steps of sending a first picture, determining that the short side length of the third picture is a sixth pixel number, and determining the long side length of the third picture based on the aspect ratio of the first picture and the sixth pixel number;
in response to the aspect ratio not conforming to the preset range, and the first compression condition includes not sending a first picture, determining that a short side length of the third picture is a seventh pixel number, and determining a long side length of the third picture based on the aspect ratio of the first picture and the seventh pixel number; and/or
And responding to the fact that the length-to-width ratio does not accord with the preset range, wherein the first compression condition comprises the steps of sending a first picture, determining that the short side length of the third picture is an eighth pixel number, and determining the long side length of the third picture based on the length-to-width ratio of the first picture and the eighth pixel number.
7. The method of claim 6, wherein,
the fifth pixel number is 1280 pixels;
the sixth pixel number is 800 pixels or 1280 pixels;
the seventh pixel number is 600 pixels; and/or
The eighth pixel number is 400 pixels or 600 pixels.
8. The method of claim 6, further comprising:
before determining the size of the third picture, determining a sixth pixel number and/or a value of the eighth pixel number based on a second compression condition, wherein the second compression condition comprises picture quality priority or transmission efficiency priority, the value of the sixth pixel number comprises a first value and a second value, the value of the eighth pixel number comprises a third value and a fourth value, the first value and the second value are not equal, and the third value and the fourth value are not equal;
the value of the sixth pixel number is the larger one of the first value and the second value in response to the second compression condition including picture quality priority, and the value of the sixth pixel number is the smaller one of the first value and the second value in response to the second compression condition including transmission efficiency priority; and/or
And in response to the second compression condition including picture quality priority, the value of the eighth pixel number is the larger one of the third value and the fourth value, and in response to the second compression condition including transmission efficiency priority, the value of the sixth pixel number is the smaller one of the third value and the fourth value.
9. The method of claim 8, wherein,
the first value is 800 pixels, the second value is 1280 pixels, the third value is 400 pixels, and the fourth value is 600 pixels.
10. The method of claim 1, further comprising:
compressing the first picture based on a preset compression mode to generate the second picture and the third picture respectively, including:
responding to the compression mode as a first compression mode, performing first quality compression on the first picture so that the quality of the second picture and the quality of the first picture form a first preset proportion, and the quality of the third picture and the quality of the first picture form a second preset proportion;
and responding to the compression mode being a second compression mode, performing N times of second quality compression on the first picture to enable the picture memory size of the second picture to conform to a fourth preset range, or performing M times of second quality compression on the first picture to enable the picture memory size of the third picture to conform to a fifth preset range, wherein each time of second quality compression enables the quality of the compressed picture to be in a third preset proportion with the quality of the picture before compression, and N and M are integers.
11. The method of claim 1, wherein,
the first preset proportion is 40%, the second preset proportion is 30%, and/or the third preset proportion is 90%.
12. The method of claim 1, further comprising:
before the second picture and the third picture are sent, the picture format of the second picture and/or the third picture is converted into a preset format in response to the picture format of the second picture and/or the third picture being different from the preset format.
13. The method of claim 12, wherein,
the preset format is a JPG format, a JPEG format and/or a PNG format.
14. The method of claim 1, further comprising:
and encrypting the second picture and the third picture before sending the second picture and the third picture.
15. The method of claim 1, further comprising:
and sending the first picture to the server so that a receiving end downloads the first picture from the server.
16. The method of claim 15, further comprising:
the first picture is encrypted before being sent.
17. An apparatus for transmitting a picture message in an encrypted instant messaging system, comprising:
A determining module configured to determine respective sizes of a second picture to be generated for message guidance and a third picture for picture preview based on an aspect ratio of a first picture as a transmission target of a picture message, wherein the size of the second picture is smaller than the size of the third picture;
a compression module configured to compress the first picture based on respective sizes of the second picture and the third picture to generate the second picture and the third picture, respectively; and
and the sending module is configured to send the second picture and the third picture to a server so that a receiving end downloads the second picture and/or the third picture from the server.
18. An apparatus for transmitting a picture message in an encrypted instant messaging system, comprising:
a memory; and
a processor coupled to the memory and configured to perform the method of any of claims 1-16 based on instructions stored in the memory.
19. A computer readable storage medium comprising computer program instructions, wherein the computer program instructions, when executed by a processor, implement the method of any of claims 1-16.
20. A computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements the method of any of claims 1-16.
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