CN112929621A - Method for improving image compression transmission based on Huffman algorithm - Google Patents
Method for improving image compression transmission based on Huffman algorithm Download PDFInfo
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- CN112929621A CN112929621A CN202110078270.4A CN202110078270A CN112929621A CN 112929621 A CN112929621 A CN 112929621A CN 202110078270 A CN202110078270 A CN 202110078270A CN 112929621 A CN112929621 A CN 112929621A
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- 230000006835 compression Effects 0.000 title claims abstract description 32
- 238000007906 compression Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 title claims abstract description 14
- 230000006870 function Effects 0.000 description 3
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- 238000012986 modification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Compression Of Band Width Or Redundancy In Fax (AREA)
Abstract
The invention relates to a method for improving image compression transmission based on a Huffman algorithm, which comprises the following steps: reading picture data, scanning the picture data pixel by pixel, and separating an R, G, B channel of each pixel; reassembling the separated RGB channels into new pixel RGB data; and carrying out Hash method compression on the new pixel RGB data, and storing the new pixel RGB data into a new file to form compressed picture data. The picture bitmap is composed of a plurality of pixels, one pixel is composed of four ARGB channels, on the premise that the picture quality is guaranteed, the transparency channel A can be removed, one pixel occupies one quarter of the memory, the volume of one picture is optimized by 25%, and the transmission speed of the picture is favorably improved.
Description
Technical Field
The invention relates to the technical field of image processing, in particular to a method for improving image compression and transmission based on a Huffman algorithm.
Background
With the popularization of smart phones and the continuous improvement of mobile phone pixels, at present, people take pictures by using mobile phones, pictures are shared by friends, the frequency of sending the pictures to friend circles is higher and higher, the occupied memory for taking the same picture is larger and larger due to the improvement of the pixels, the user experience effect is poorer and poorer due to the fact that the picture is transmitted in a network with lower and slower efficiency due to the increase of the picture volume, and how to meet the trend that the picture demand of people is developed in the future is met.
The android picture transmission occupies a large memory, the transmission efficiency is low, the graphics engine library with the system self-carrying ski (the core library is the libjpeg library) is utilized, the system version and the *** system limit (the low-version *** is castrated with the Huffman algorithm), and the customized picture processing can not be well compatible with the full version.
Disclosure of Invention
The invention provides a method for improving image compression and transmission based on a Huffman algorithm aiming at the problems. The invention utilizes the Huffman algorithm of the library to carry out customized compression processing on the picture according to the requirement, thereby achieving the purpose that the picture is compatible with the full version and the polarized transmission.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
a method for improving image compression transmission based on a Huffman algorithm comprises the following steps:
s1, reading picture data, scanning the picture data pixel by pixel, and separating a R, G, B channel of each pixel;
s2, reassembling the separated RGB channels into new pixel RGB data;
and S3, carrying out Hash method compression on the new pixel RGB data, and storing the new pixel RGB data into a new file to form compressed picture data.
Preferably, the method for separating the R, G, B channel of each pixel in step S1 is as follows:
shifting the R channel in the pixel to the right by 16 bits and then &0xFF, and storing a new R channel;
shifting the G channel in the pixel to the right by 8 bits and then comparing the G channel with 0xFF, and storing a new G channel;
and finally, performing B channel &0xFF on the pixel.
Preferably, step S3 is specifically:
creating jpeg compression object, storing the file in a directory, and setting compression parameters; and the channel mode of the picture is RGB, starting a Huffman function, starting compression, circularly writing each line of data, and completing compression to release the jpeg object.
Further, the compression parameter is picture width and height.
The picture bitmap is composed of a plurality of pixels, one pixel is composed of four ARGB channels, on the premise that the picture quality is guaranteed, the transparency channel A can be removed, one pixel occupies one quarter of the memory, the volume of one picture is optimized by 25%, and the transmission speed of the picture is favorably improved.
Detailed Description
In order that those skilled in the art will be able to understand and practice the present invention, further description will be given below of embodiments of the present invention.
The invention provides a method for improving image compression transmission based on a Huffman algorithm, which comprises the following steps:
s1, reading picture data, scanning the picture data pixel by pixel, and separating a R, G, B channel of each pixel;
in step S1, the method for separating the R, G, B channel of each pixel includes:
shifting the R channel in the pixel to the right by 16 bits and then &0xFF, and storing a new R channel;
shifting the G channel in the pixel to the right by 8 bits and then comparing the G channel with 0xFF, and storing a new G channel;
and finally, performing B channel &0xFF on the pixel.
S2, reassembling the separated RGB channels into new pixel RGB data;
and S3, carrying out Hash method compression on the new pixel RGB data, and storing the new pixel RGB data into a new file to form compressed picture data.
Wherein, step S3 specifically includes:
creating jpeg compression object, storing files in a directory, and setting compression parameters, such as picture width and height; and the channel mode of the picture is RGB, starting a Huffman function, starting compression, circularly writing each line of data, and completing compression to release the jpeg object.
The principle of the invention is as follows:
1) the picture bitmap is composed of a plurality of pixels, one pixel is composed of argb four channels, on the premise that the picture quality is guaranteed, a transparency channel can be removed, the memory occupied by one pixel is reduced by one quarter, and the volume of one picture is optimized by 25%.
Analyzing bitmap to obtain argb data, obtaining internal information to obtain pixel information in a picture, obtaining each pixel of the picture through double circulation of the width and the height of the picture, shifting an r channel in the pixel to the right by 16 bits and then storing a new r channel by &0xFF, shifting a g channel in the pixel to the right by 8 bits and then storing a new g channel by &0xFF, then shifting a b channel in the pixel by &0xFF, and finally reassembling the rgb data (corresponding to the step S1/2 of the invention).
2) And processing the obtained information of the new picture according to the requirements, such as the width, height, quality and path of the final expected picture, starting Huffman algorithm compression, and storing the compressed information into a new file.
Creating a jpeg compression object (object), storing the file in a directory, setting compression parameters such as the width and the height of a picture, setting the channel mode of the picture to rgb, starting a huffman function, starting compression, circularly writing each line of data, and releasing the jpeg object after the compression is completed (corresponding to step S3 of the present invention).
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (4)
1. A method for improving image compression transmission based on Huffman algorithm is characterized by comprising the following steps:
s1, reading picture data, scanning the picture data pixel by pixel, and separating a R, G, B channel of each pixel;
s2, reassembling the separated RGB channels into new pixel RGB data;
and S3, carrying out Hash method compression on the new pixel RGB data, and storing the new pixel RGB data into a new file to form compressed picture data.
2. The method of claim 1, wherein the step S1 of separating the R, G, B channel of each pixel comprises:
shifting the R channel in the pixel to the right by 16 bits and then &0xFF, and storing a new R channel;
shifting the G channel in the pixel to the right by 8 bits and then comparing the G channel with 0xFF, and storing a new G channel;
and finally, performing B channel &0xFF on the pixel.
3. The method for improving the compressed transmission of the pictures based on the huffman algorithm according to the claim 1 or 2, wherein the step S3 is specifically as follows:
creating jpeg compression object, storing the file in a directory, and setting compression parameters; and the channel mode of the picture is RGB, starting a Huffman function, starting compression, circularly writing each line of data, and completing compression to release the jpeg object.
4. The method of claim 3, wherein the compression parameter is picture width and height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110078270.4A CN112929621A (en) | 2021-01-20 | 2021-01-20 | Method for improving image compression transmission based on Huffman algorithm |
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| CN202110078270.4A CN112929621A (en) | 2021-01-20 | 2021-01-20 | Method for improving image compression transmission based on Huffman algorithm |
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| CN202110078270.4A Pending CN112929621A (en) | 2021-01-20 | 2021-01-20 | Method for improving image compression transmission based on Huffman algorithm |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004040300A (en) * | 2002-07-01 | 2004-02-05 | Fuji Photo Film Co Ltd | Image processing apparatus |
| CN102821279A (en) * | 2012-07-31 | 2012-12-12 | 北京天神互动科技有限公司 | Picture compression method keeping with alpha channel |
| CN103826028A (en) * | 2012-11-19 | 2014-05-28 | 腾讯科技（深圳）有限公司 | Method and device for compressing picture in lossless way |
| CN111147861A (en) * | 2020-01-02 | 2020-05-12 | 广州虎牙科技有限公司 | Image compression method, device, user equipment and computer readable storage medium |
-
2021
- 2021-01-20 CN CN202110078270.4A patent/CN112929621A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004040300A (en) * | 2002-07-01 | 2004-02-05 | Fuji Photo Film Co Ltd | Image processing apparatus |
| CN102821279A (en) * | 2012-07-31 | 2012-12-12 | 北京天神互动科技有限公司 | Picture compression method keeping with alpha channel |
| CN103826028A (en) * | 2012-11-19 | 2014-05-28 | 腾讯科技（深圳）有限公司 | Method and device for compressing picture in lossless way |
| CN111147861A (en) * | 2020-01-02 | 2020-05-12 | 广州虎牙科技有限公司 | Image compression method, device, user equipment and computer readable storage medium |
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Effective date of registration: 20211220 Address after: 518000 B901, Shenzhen national engineering laboratory building, No. 20, Gaoxin South seventh Road, high tech Zone community, Yuehai street, Nanshan District, Shenzhen, Guangdong Applicant after: Shenzhen compuchip Information Technology Co.,Ltd. Address before: 518000 Building 201, No. 1, Qianwan Road, Qianhai Shenzhen-Hong Kong Cooperation Zone, Shenzhen, Guangdong Province (Admitted to Shenzhen Qianhai Business Secretary Co., Ltd.) Applicant before: SHENZHEN VCLUSTERS INFORMATION TECHNOLOGY Co.,Ltd. |
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Application publication date: 20210608 |
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