reference of the encoded image after motion compensation. The prediction image P is subtract from the FN of the current frame, and the residual difference DN of the two images is obtained. The dn is converted to t, q is quantified, and space redundancy is eliminated. The coefficient x is obtained, sorts X (to make the data more compact) and Entropy code (to add motion vectors... Obtain the nal data. The re-encoder has a reconstruction process (decoding process), quantization factor X, reverse q
coding compression ratio and transmission reliability, which has been widely used in digital TV broadcasting, real-time video communication, network streaming media and other fields. two. Introduction to the video coding method of H.
In terms of the overall coding framework, H. E still uses a structure similar to the previous standard, that is, the block structure of the hybrid coding framework. The main structure of the diagram is as follows:
The h image of each frame is encoded into one or mo
about the paper
This two days turned over cvpr2014 paper, found Ming teacher about objectness detecting paper, so read a. The paper contributed two points of view:
The target has closed boundary, so the window resize to 8x8 can also be targeted and background recognition, which actually reduces the resolution of the window, resize to 8x8 to accelerate the calculation. This is the same as we look on the roa
video storage;
3) extended grade: supports effective switching between code streams (SP and Si slices) and improved error code performance (data segmentation), but does not support line-by-line video and cabac.
The definitions of I, P, B, SP, AND Si mentioned above are as follows: an encoded image is usually divided into several macro blocks, A macro block consists of a 16x16 brightness pixel and an 8x8 CB appended with an
Label: style blog http ar for strong SP 2014 data
A. General Introduction to the transformation quantification process
Frame (16x16 and 4x4 brightness, 8x8 color) and frame (4x4 ~ 16x16 brightness, 4x4 ~ 8x8 color) after pixel block prediction, the residual of the prediction block is obtained. To reduce the statistical redundancy of the residual information, the residual data must be transformed and quantif
to mix encoding for the same movie, which is the same as MPEG-2. In the image Color format support, H.264/AVC the first version of the standard only support YCRCB 4:2:0 sampling method, and in the second edition of the revised standard to add 4:2:2 and 4:4:4 sampling format, usually these formats will be used in digital movies or HDTV films.3.1 H.264/AVC image Format class structureH.264/AVC hierarchy from small to large in sequence is Sub-block, block, macroblock, Slice, slicegroup, frame/fiel
method to reduce the resolution is to reduce the original texture. For ease of calculation, the original texture is usually reduced by the power of 2. If the original texture is 8x8, the MIP map is 4x4, 2x2, 1X1. In order to reduce the texture without causing serious distortion, we need to filter the original texture. The procedure is as follows.
If we have a texture A, its size is 8 × 8. The value of each texture element is represented by.
Java Advanced (57)-Phash image registration algorithm based on perceptual hashing algorithm?? After the submission of the graduation thesis, the teacher gave himself a task: image registration, that is, to give you two images, through the system to determine whether two images are the same image. Oneself as this aspect of small white, first to go online search for the corresponding detection method, of course, there is a ready API call the best, money does not matter.?? The fundamental technolog
Block effect and its causeWhen we watch the video, in the scene of vigorous motion, we can often observe that the small squares appear in the image, and the small squares show discontinuous effect at the boundary (such as), this phenomenon is called the Block effect (blocking artifact).First, we need to figure out why the block effect occurs. In the coding process, the DCT transform of the pixel residuals was obtained, and the DCT coefficients were correlated with each pixel, which represented t
. The odd number of rows is the base field. All the top fields are called the top fields. All bottom fields are called bottom fields.Frame: The image scanned row by row.Image: both the field and frame are considered as images.(4) macro blocks and slices:Macro Block: a macro block consists of a 16x16 brightness block, an 8x8 CB, and an 8x8 Cr.Slice: an image can be divided into one or more slices. A slice co
uses RGB space to save the image. One pixel is 24 bits, each 8 bits saves a color intensity (0-255), for example, red is saved as 0xff0000.
YUV introduction:YUV is a color encoding method used by European television systems. This method is also widely used in China's radio and television systems. "Y" indicates the brightness (luminance or Luma), that is, the gray scale value, while "u" and "V" indicate the color (chrominance or chroma ). The color TV uses the YUV space to solve the compatibili
the horizontal direction ), and the most common (take one of the multiples of 2 in the horizontal and vertical directions ). For the remaining parts of the compression process, Y, U, and V are processed individually in a very similar way.
Discrete cosine transformation (Discrete cosine transform)Each component (Y, U, V) in the video is generated into three areas, each of which is then divided into 8x8 sub-areas arranged as tiles, each subarea uses t
process.
The JPEG algorithm is independent of the color space. Therefore, "RGB to YUV Conversion" and "YUV to RGB conversion" are not included in the JPEG algorithm. The JPEG algorithm processes color images with separate color components. Therefore, it can compress data from different color spaces, such as RGB, YCbCr, and CMYK.
Ii. Main JPEG algorithm calculation stepsThe main calculation steps of the JPEG compression algorithm are as follows:(1) Forward discrete cosine transformation (FDCT ).
Bkjia.com integrated message] in SOX, HIPAA, glba and ca SB-1386 and other network security standards implementation of the times, a successful attack will bring to your business website how much loss? To protect sensitive enterprise data legally, you need to solve the following problems: how to protect the key resources of Web resources? How much investment is required to protect these valuable application resources? How can we know that we have been
being audited abort with errors. this is the reason the table shocould be purged periodically. this is the only sys-owned table against which actions like Delete and truncate are allowed.
Before purging the data from this table, an important point must be brought up? Audit records are valuable. even if they have been summarized in some report, it may still be worth keeping the old data intact in the raw form, as the reports may not have extracted every bit of useful information. in the future,
changes to user permissions and user group accounts; and vigilant monitoring of servers, check for suspicious file activity. Whether unauthorized users attempt to access personal files or get bored with their work to download MP3 files, the real security policy management tool will notify the corresponding administrator and automatically take the scheduled action.
With this real-time tracking, notification, and repair function, the dangers of Internal Security damages can be easily controlled a
scenarios, the product now has three versions: Enterprise Edition, Standard Edition, branch architecture edition and Development edition. Biztalk Server 2006 R2 Enterprise Edition, Standard Edition and branch edition are licensed based on each processor. Each processor installed with any BizTalk Server components (such as the BizTalk Server rule engine) requires a license. However, some tools and components can be installed on a separate machine without a processor license. For more information
called Direct. Unlike the Connect,direct design, it is a peer-to-peer structure. Medical providers who are accustomed to sending messages back and forth are familiar with the open, Peer-to-peer data exchange model of direct, so direct is more likely to be used.
e-mail security and medical IT
Patient data stored in the medical IT system must comply with strict privacy and security regulations, such as the health Insurance Circulation and Accountability Act (
In order to bring better security and control to network services, the United States Louisiana decided to replace the existing wide area network (WAN), and the use of Ethernet switches (provided by Enterasys Network Company)-driven dedicated fiber ring network, At the same time for the deployment of mobile office staff need 802.11n wireless mesh network is ready.
"The network upgrades are partly due to the government's regulations, including the Health Insurance Portability and Accountability A
The deadline for the IBM program challenge is approaching. Today, I have spent some time modifying it and handed it over. Alas, I have spent too much time on it and many lessons have been skipped.
After all, this is very difficult. In the past, many Othello papers on 8x8 could not come in handy, because IBM's questions may not be 8x8, but those theories, for example, a lot of starting points, pattern, and p
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