Warning:
This is a final report for an older project done for a Berkeley class, so it is a rather low level description.
This project is not currently active, but I might continue it some day.
You may want to skip toResult Section
To see if this is of any interest to you.
High quality chroma key
Introduction.
The main goal of this project is to write a high quality
Key
Symbol and numerical conventionsI. Basic concepts of keyIi. Luma-KeyIii. chroma-Key4. Channel key uses the color channel for image Extraction5. Color Difference mattesVi. DV keyVII. References Determine the
How does the Edius chroma key synthesize the video picture? Using Edius chroma key effects, you can color image processing. This method of image-picking is very useful in virtual studio for the synthesis of virtual backgrounds. Chroma Ke
Key interrupt Hardware Development new schematic diagram1. Open Quartus II 11.0, create a new project, File--New project Wizard ..., ignore introduction, click between? Next> go to the next step. Set up engineering working directory, project name respectively. It is important to note that in the engineering work directory, please use English, do not include spaces, etc., or you may have problems when using
It is well known that Android has no clear guideline, although there is no strict specification to limit design and innovation, but it also leads to confusion on the design of Android apps in the marketplace. A typical example is the Options menu.
Messy Menu
The Android machine uses the hardware keys to exhale the menu, which, in a way that is implicit, is not predictive of what kind of menu the user can exhale, or even whether the menu can be paged
First go to open the bare metal driver key code BUTTON.C:1) key initialization---the choice of gpio function is external interrupt, the initialization of this hardware should be placed under the development of Linux where? A, in the Open function, B, in the initialization of the module. Choose one.The corresponding interrupt mode:Processing of interrupt numbersIn
configuration, and audio object type, which are generally the configuration parameters required by the AAC decoder. This data also has the corresponding decoding function in the ffmpeg: Avpriv_aac_parse_header. In my project, I did not use this function, but I implemented it myself:
typedef struct{INT Write_adts;int objecttype;int sample_rate_index; int channel_conf;} Adtscontext;Intaac_decode_extradata (adtscontext*adts,unsignedchar*pbuf,int BufSize) {intaot,aotext,samfreindex; inti,channelc
, channelconfig; unsigned char *p = pbuf; if (!adts | |!pbuf | | bufsizethe pbuf above is extradata. Next, use the Adtscontext data encoding to insert the ADTS header information in front of each AAC frame:
int Aac_set_adts_head (Adtscontext *acfg, unsigned char *buf, int size) {unsigned char byte; if (Size the head is a fixed 7- byte length, so the 7 bytes can be vacated in advance for ADTS occupancy. through the above to H264 and AAC Extended Data processing, playing a var
Use Eclipse to create a workaround for the right home keyboard, back key, and so on for Android virtual machines:Open Android Virtual device Manager to view virtual machine details:650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M02/7B/13/wKiom1bGiOuwTf9xAAEegaq8RK8680.png "title=" Qq20160219111120.png "alt=" Wkiom1bgiouwtf9xaaeegaq8rk8680.png "/>Open the path path in the picture and open the config file;650) this.width=650; "src=" Http://s1.51
;}
The head is a fixed 7-byte length, so the 7 bytes can be vacated in advance for Adts occupancy.Through the above to H264 and AAC extended data processing, play all kinds of "gold partner" multimedia files, streaming media, video-on-demand, etc. should be no problem.Want to get more original articles in the first time, please pay attention to the personal public platform: Programmer Interaction Alliance (coder_online), sweep the QR code below or search number Coder_online can p
Key hardware decoding and decryption and decoding Technologies
In the previous article, we used ffmpeg to separate audio and video data in a multimedia container, but it is likely that the data cannot be correctly decoded. Why? Before decoding the data, you need to configure the decoder. A typical example is the combination of H264 + AAC, a popular "golden partner. This article describes how to parse
Key Technical Specifications:1. Detection range;2. Detection accuracy;3. Detection angle;4. Frame rate.5. Module size6. Power consumptionWe are now aware of:Binocular vision, single-point TOF, 3D tof,3d structured light, single-camera depth (Pdaf in the image to calculate depth).3D Tof is the point of multiple single-point tof formation.The pattern of structured light is more complex.Reflective is a big enemy of three-dimensional scanning, which produ
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