CN108460729A - A kind of computer readable storage medium and the Image Reversal device using the medium - Google Patents
A kind of computer readable storage medium and the Image Reversal device using the medium Download PDFInfo
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- CN108460729A CN108460729A CN201810045779.7A CN201810045779A CN108460729A CN 108460729 A CN108460729 A CN 108460729A CN 201810045779 A CN201810045779 A CN 201810045779A CN 108460729 A CN108460729 A CN 108460729A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformation in the plane of the image
- G06T3/60—Rotation of a whole image or part thereof
- G06T3/606—Rotation by memory addressing or mapping
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/60—Memory management
Abstract
The present invention relates to technical field of image processing, more particularly to the Image Reversal device of a kind of computer readable storage medium and the application medium, the dielectric memory has computer program, which can be executed by the processor of Image Reversal device.The Image Reversal device turns the yuv data that YUV algorithms are converted to RGB data equal length using RGB, then the length that oversampling ratio further reduces yuv data is reduced again, finally in the yuv data storage to SDRAM that length is 16bit, after turning operation being carried out to data, the length of yuv data is restored again, then turn RGB algorithms yuv data translation bit RGB data using YUV, be then sent to display screen and show.The size of data of the required storage of image of 1920*1080 resolution ratio in this way is 1920*1080* length C=16=33177600bit.Reduce a large amount of memory space on the basis of original, and it is the SDRAM of length C=16bit bit wides only to need data line, reduces design cost.
Description
Technical field
The present invention relates to technical field of image processing, more particularly to a kind of computer readable storage medium and apply the medium
Image Reversal device, which has computer program, which can be held by the processor of Image Reversal device
Row.
Background technology
With the fast development of picture pick-up device hardware itself and image processing techniques, high-definition image, image people life
Popularization and application in living, study and work, more stringent requirements are proposed for this processing system to high-definition image, image.Image
Overturning is that piece image is interchangeable up and down, and very frequent, MIPI shown in Fig. 1 is used in image processing field
It is the abbreviation of mobile industry processor interface, it is a kind of agreement that transmission of video is shown, including a clock lane and four
A data lane.Conventional Image Reversal processing method is：MIPI is by serially transmitting the data in four channels, four
Then the data solution of Data Lane changes into the RGB display datas of 24bit, then RGB display datas at the parallel data of 32bit
The YUV display datas of 16bit are converted to, in the yuv data storage to SDRAM memory that then every frame picture is obtained again, so
The yuv data inside SDRAM is read and be reduced to the RGB display datas of 24bit afterwards, finally realize the overturning of image and is shown
Show.
When the image to high-resolution, high-bit width carries out overturning processing, first the MIPI signals of full frame image can be changed into
24bit RGB data storage in SDRAM, then read first address successively from the last one address of SDRAM again,
This completes the overturnings of a frame image.However, the size of data of the required storage of the image of 1920*1080 resolution ratio is
1920*1080*24=49766400bit can occupy a large amount of memory space, result in waste of resources in this way, the SDRAM needed
Memory space it is larger, increase design cost.
Invention content
It is an object of the invention to：A kind of meter for having and can reducing the memory space occupied in Image Reversal operation is provided
The computer readable storage medium of calculation machine program, and the Image Reversal device using the medium.
To achieve the above object, the present invention provides a kind of computer readable storage medium, is stored with computer program
Flipped image, the program realize following steps when being executed by processor：
Image data acquisition step reads the MIPI signals of image and generates the parallel data that length is A；
Above-mentioned parallel data is converted to the RGB display datas that length is B by RGB data generation step；
The RGB display datas that above-mentioned length is B are converted to the YUV mediants that length is B by yuv data generation step
According to；
The YUV intermediate data that above-mentioned length is B is converted to the YUV that length is C and shows number by yuv data switch process
According to；
Yuv data processing step stores the YUV display datas that above-mentioned length is C into SDRAM, then with default
Rule from SDRAM read length be C YUV show number, to complete the data processing of Image Reversal；
A is more than B and is more than C.
Wherein, further include the following steps realized after yuv data spread step when which is executed by processor：
Yuv data processing step, it is B's that the YUV display datas that overturning treated length is C, which are converted to length,
YUV growth datas；
Image exports step, and the YUV growth datas that length is B are converted to the RGB output datas that length is B, should
RGB output datas are for exporting to display device.
Wherein, the length of described A, B, C are 32bit, 24bit, 16bit respectively.
Wherein, in the yuv data generation step, use following formula that RGB display datas are converted among YUV
Data：
Y=0.299*R+0.587*G+0.114*B；
U=-0.147*R -0.289*G+0.436*B；
V=0.615*R -0.515*G -0.100*B.
Wherein, it in the yuv data switch process, reduces to the oversampling ratio of YUV intermediate data to obtain YUV
Display data.
Wherein, in the yuv data spread step, following formula extension YUV intermediate data is used：
Wherein, it in described image exports step, uses following formula that YUV growth datas are converted to RGB and exports number
According to：
R=Y+1.140*V；
G=Y -0.394*U -0.518*V；
B=Y+2.032*U.
A kind of Image Reversal device, including processor and above computer readable storage medium storing program for executing are also provided, which can
The computer program read on storage medium can be executed by processor.
Advantageous effect：After the parallel data for obtaining 32bit by MIPI, the parallel data of 32bit is converted into 24bit
Then wide RGB data turns the YUV numbers that YUV algorithms are converted to the RGB data of 24bit bit wides 24bit bit wides using RGB
According to then the YUV signal of 24bit bit wides being converted to again the YUV signal of 16bit, then the YUV data of 16bit bit wides are stored
Into SDRAM, data are then read to complete the data processing of Image Reversal, then reading with default rule from SDRAM
The yuv data of the 16bit bit wides gone out is reduced to the yuv data of 24bit bit wides, recycles YUV to turn RGB algorithms and yuv data is turned
It is changed to RGB data, display screen is then sent to and shows, the data of the required storage of image of such 1920*1080 resolution ratio
Size is 1920*1080*16=33177600bit.Reduce a large amount of memory space on the basis of original, and only needs to count
According to the SDRAM that line is 16bit bit wides, design cost is reduced.
Description of the drawings
Fig. 1 is the control block diagram of MIPI agreements.
Fig. 2 is the flow chart of the Image Reversal device.
Fig. 3 is the schematic diagram of the yuv data write-in SDRAM of the Image Reversal device.
Fig. 4 is the schematic diagram that the yuv data of the Image Reversal device is read from SDRAM.
Specific implementation mode
The invention will be further described with the following Examples.
As shown in Fig. 2, following steps are executed by Image Reversal device, to be realized to the quick, accurate of image
Overturning.
Image data acquisition step a：The data of the MIPI signals for four data lane that mobile phone transmits are changed into length
The parallel data of A=32bit is spent, RGB data generation step is then executed, length B=24bit is changed into according to MIPI agreements
Wide RGB data.
Yuv data generation step b：Turn YUV algorithms using RGB and the RGB data of length B=24bit is converted into length B
The yuv data of=24bit, RGB turn YUV algorithms：
Y=0.299*R+0.587*G+0.114*B；
U=-0.147*R -0.289*G+0.436*B；
V=0.615*R -0.515*G -0.100*B.
Yuv data switch process c：The yuv data of length B=24bit bit wides is converted to the YUV numbers of length C=16bit
According to that is, by YUV444 translation bits YUV422.
YUV444 is 4:4:4 samplings, each Y correspond to one group of UV component；Code stream storage mode：Y0U0V0, Y1U1V1,
Y2U2V2, Y3U3C3, Y4U4V4 ...
YUV422 is 4:2:2 samplings, each two Y share one group of UV component；Code stream storage mode：Y0U0, Y1V0, Y2U2,
Y3V2, Y4U4 ...
The yuv data of length B=24bit is converted to the yuv data of length C=16bit i.e. by the corresponding odd number of UV data
Component extraction is gone out, and even components are left behind.
Yuv data processing step d：As shown in figure 3, in the yuv data storage to SDRAM of length C=16bit, then
As shown in figure 4, the data inside SDRAM are read out, specifically：Data are written when storing since address 0, by full frame image
Data write, for example it is addrn to write the last one address, and data are read when reading since the addrn of the last one address, always
Address 0 is read, to complete the data processing of Image Reversal.
Yuv data spread step e：The yuv data of length C=16bit is reduced to the YUV numbers that length is B=24bit
According to.
The reduction formula of yuv data spread step e：
Image exports step f：The yuv data of length B=24bit is reduced to the RGB data of length B=24bit.
Image exports the reduction formula of step f：
R=Y+1.140*V；
G=Y -0.394*U -0.518*V；
B=Y+2.032*U.
Image exports step g：The RGB data of length B=24bit is connected to display screen by rgb interface chip can point
Bright screen completes the display of Image Reversal.
The Image Reversal device realizes the overturning to high-definition image by step as above, turns YUV algorithms length using RGB
The RGB data of B=24bit bit wides is converted to the yuv data of length B=24bit bit wides, then again length B=24bit bit wides
YUV signal be converted to the YUV signal of length C=16bit, then the yuv data storage of length C=16bit bit wides is arrived
In SDRAM, the yuv data of length C=16bit bit wides is reduced to length B=24bit bit wides YUV again after then reading data
Data recycle YUV to turn RGB algorithms yuv data translation bit RGB data, are then sent to display screen and show, such 1920*
The size of data of the required storage of image of 1080 resolution ratio is 1920*1080*16=33177600bit.In original base
Reduce a large amount of memory space on plinth, and it is the SDRAM of length C=16bit bit wides only to need data line, reduces and sets
Count cost.
Claims (8)
1. a kind of computer readable storage medium is stored with the computer program for realizing Image Reversal, which is characterized in that
The program realizes following steps when being executed by processor：
Image data acquisition step reads the MIPI signals of image and generates the parallel data that length is A；
Above-mentioned parallel data is converted to the RGB display datas that length is B by RGB data generation step；
The RGB display datas that above-mentioned length is B are converted to the YUV intermediate data that length is B by yuv data generation step；
The YUV intermediate data that above-mentioned length is B is converted to the YUV display datas that length is C by yuv data switch process；
Yuv data processing step stores the YUV display datas that above-mentioned length is C into SDRAM, then with preset rule
The YUV that length is C is then read from SDRAM and shows number, to complete the data processing of Image Reversal；
A is more than B and is more than C.
2. computer readable storage medium according to claim 1, which is characterized in that when the program is executed by processor also
It is included in the following steps realized after yuv data spread step：
The YUV display datas that overturning treated length is C are converted to the YUV that length is B and expanded by yuv data processing step
Open up data；
Image exports step, and the YUV growth datas that length is B are converted to the RGB output datas that length is B, RGB outputs
Data are for exporting to display device.
3. computer readable storage medium according to claim 1, which is characterized in that the length of described A, B, C is respectively
32bit、24bit、16bit。
4. computer readable storage medium according to claim 1, which is characterized in that in the yuv data generation step
In, use following formula that RGB display datas are converted to YUV intermediate data：
Y=0.299*R+0.587*G+0.114*B；
U=-0.147*R -0.289*G+0.436*B；
V=0.615*R -0.515*G -0.100*B.
5. computer readable storage medium according to claim 1, which is characterized in that in the yuv data switch process
In, the oversampling ratio to YUV intermediate data is reduced to obtain YUV display datas.
6. computer readable storage medium according to claim 2, which is characterized in that in the yuv data spread step
In, use following formula extension YUV intermediate data：
7. computer readable storage medium according to claim 2, which is characterized in that in described image exports step,
It uses following formula that YUV growth datas are converted to RGB output datas：
R=Y+1.140*V；
G=Y -0.394*U -0.518*V；
B=Y+2.032*U.
8. a kind of Image Reversal device, including processor, which is characterized in that further include any one of claim 1~7 meter
Calculation machine readable storage medium storing program for executing, the computer program on the computer readable storage medium can be executed by processor.
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| CN113591878A (en) * | 2021-07-09 | 2021-11-02 | 杭州当虹科技股份有限公司 | Dynamic HDR image feature extraction method |
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| CN113591878A (en) * | 2021-07-09 | 2021-11-02 | 杭州当虹科技股份有限公司 | Dynamic HDR image feature extraction method |
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Application publication date: 20180828 |