chroma tartarus

, such as (for the 8x8 block boundary, the PIJ and Qij refers to the middle four rows, near the boundary of four columns, called Four-sam Ple part of a block boundary): bs = 2: At least one 8x8 block on both sides of the boundary belongs to intra, and if the conditions of bs=2 are met, no bs=1 judgment is made; bs = 1: At least one 8x8 block has a non-0 residual coefficient, and the boundary is the TU boundary; BS = 1: The absolute difference of the motion vectors of the two blocks is gr

Always keep the video data YUV, because different type definitions are derived from different companies based on the organization of their products, and derive a number of different YUV formulas.Broadly, YUV from the pixel organization in the form of dots, there are two: 1.planer states. 2.packet status.Planar Mode example: Y0y1 .... Yn u0u1 ... Um V0V1: VM,YUV three channels of continuous storage;Example of packet mode: Y0u0v0 + y1u1v1 + ... + YNUNVN,YUV three channels mixed storage.The planar

also based on the different types of residual data to choose, in-frame encoding macro block brightness DC coefficient (only for the 16x16 Prediction mode is valid) using a 4x4 matrix, chroma DC coefficients using a 2x2 matrix, for the other uses a 4x4 block to transform. The use of integer-based spatial transformations can increase the computational speed (using only addition and displacement operations), but the use of integer transformation to the

intra-frame prediction blocks were specified: 4*4, 8*8, and 16*16, and intra-frame prediction blocks for chroma components were based on 8*8 size blocks. The brightness blocks of the 4*4 and 8*8 sizes contain 9 predictive modes (vertical, horizontal, DC, lower left diagonal mode, right down diagonal mode, vertical right mode, horizontal down mode, vertical left mode, and horizontal up mode), while the 16*16-size brightness blocks and 8* The 8-size

The YUV color model is derived from the RGB model, which is characterized by the separation of luminance and chroma, which is suitable for the field of image processing.YCbCr model is derived from YUV model, applied to digital video, ITU-R BT.601 RecommendationThrough the above comparison can be determined that we are in h.264,mpeg and other coding standards in the YUV is actually ycbcr, we do not confuse the name.In order to reduce the amount of data

encodes bitstream, only supports i420, color space settings */int I_LEVEL_IDC; /* Settings for level values */int i_frame_total; /* Total number of encoded frames, default 0 *//*vui parameter Set video availability information Video normalization options */struct{/* They'll be reduced to be 0 int i_sar_height;int i_sar_width; /* Set aspect ratio */int I_overscan; /* 0=undef, 1=no overscan, 2=overscan over scan line, default "Undef" (not set), optional: Show (Watch)/crop (remove) */ /* See the f

direction is only half 4:4:4. For uncompressed 8-bit quantization images, a macro pixel consisting of two pixels adjacent to each other horizontally requires 4 bytes of memory (2 bytes of brightness, two shades per 1 bytes). .The following four pixels are: [Y0 U0 V0] [Y1 U1 V1] [Y2 U2 V2] [Y3 U3 V3]The stored stream is: Y0 U0 Y1 V1 Y2 U2 Y3 V3Mapped pixel points: [Y0 U0 V1] [Y1 U0 V1] [Y2 U2 V3] [Y3 U2 V3](3) YUV 4:1:1The chroma sampling of the 4:1:1

the horizontal and vertical component of the motion vector; Except for the case when the motion vector have an integer Value, fractional sample interpolation is used to generate the Prediction samples for Noninteger sampling positions. As in H.264/mpeg-4 AVC, HEVC supports motion vectors with Units of one quarter of the distance between Luma samples. In addition to the MV with integer values, the pixel interpolation is used to generate the predicted pixels for neighboring pixel positions. Lik

To the photographic enthusiasts to share a detailed analysis of the Canon 7D camera evolution of high ISO speed noise reduction function. Share list: Key points for flexible application: 1, using a tripod shooting, even if the night scene photography can be in the ISO 3200 will be "NR" set to "close" to retain sharp detail performance. 2, raw imaging is the key to skilled use of noise reduction level. Adjust the parameters, the decision is priority to reduce noise or detail performance. 3,

= (g-b)/delta; Between Yellow Magentaelse if (G = = max)H = 2 + (B-R)/delta; Between Cyan YellowElseH = 4 + (R-G)/delta; Between Magenta CyanH *= 60; Degreesif (H H + = 360;}YUV Color SpaceYUV (also known as YCRCB) is a color coding method (belonging to PAL) adopted by the European television system. In modern color TV system, three-tube color camera or color CCD camera is usually used to take the image, and then the obtained color images are separated and corrected to get RGB, then the lumi

many factors that affect the perceived color of the human eye, the perfect color illusion, or the dress that messes with the Internet. The point is that the human eye can be manipulated very well relative to the color to be recognized.Quality is a form of lossy compression, whereas JPG uses another method: the color model . A color space represents a set of colors, and its color model represents how the mathematical formula indicates the color (RGB, four separations CMYK).The great thing about

are: [Y0 U0 V0] [Y1 U1 V1] [Y2 U2 V2] [Y3 U3 V3]The stored stream is: Y0 U0 V0 Y1 U1 V1 Y2 U2 V2 Y3 U3 V3(2) YUV 4:2:2The sampling rate of each chromatic channel is half that of the luminance channel, so the chromaticity sampling rate in the horizontal direction is only half 4:4:4.For uncompressed 8-bit quantization images, a macro pixel consisting of two pixels adjacent to each other horizontally takes up 4 bytes of memory.The following four pixels are: [Y0 U0 V0] [Y1 U1 V1] [Y2 U2 V2] [Y3 U3

What is a CSS Filter? CSS Filter is an extension subset of conventional CSS. It can make the application objects (text, images, HTML elements...) produce blur, transparency, edge light, and other effects similar to those in Photoshop. The rational use of the CSS Filter can reduce the number of images used by the web page to reduce the size of the web page. You can also directly modify the filter parameters in CSS or use js to dynamically modify the CSS Filter parameters, to quickly update the

: bits 13-4-3-2-1-0 0: ccdtbl apply gamma (A-LAW) to CCDC data saved to SDRAM 0: Disable 1: Enable 13. rec656 control register (rec656if) 1: eccfh_fvl Error Correction enable 0: Disable 1: Enable 0: r656on rec656 Interface Enable 0: Disable 1: Enable 14. CCD configuration register (ccdcfg) 15: vdlc enable synchronizing function regs on vsync. 0: latched on vsync. 1: No latched 13: msbinvi MSB of chroma input signal stored to SDRAM inverted.0: normal 1

indicates how many pixels of width will be blurred. The default value is 5. If the font on the webpage is set to "ADD = 1", the font will be very nice. As follows:Filter: blur (add = ture, direction = 135, strength = 10)I fly to you, with gentle rain!3. FlipH and FlipV filtersSyntax: {filter: filph} and {filter: filpv} are horizontal inversion and vertical inversion, respectively, as follows:4. Chroma filterSyntax: {filter:

registration color (dark).Below we convert the Lena image of the mode "RGB" to "CMYK" image.　　>>> Lena_cmyk = Lena.convert ("CMYK")>>> Lena_cmyk.mode 'CMYK'>>> lena_cmyk.getpixel ((0,0)) (118,0) >>> Lena_cmyk.getpixel ((0,1)) (118,0)>>> lena_cmyk.show ()　From the example, you can learn that the formula "RGB" in PiL is converted to "CMYK" as follows:C = 255-rM = 255-gY = 255-bK = 0Since the conversion formula is relatively simple, the converted image color is somewhat distorted.The converted im

background color of the stamped picture, because this picture is on the top. In this case, you might want to add some transparency to some of these elements, and in fact no matter which layer you add transparency to is futile. Because at this time there are only two cases: outside the circle is covered by the background color, the background color transparent is a rectangular enlargement, rather than a circle. What we want is: the background color of the mask is transparent, and the enlarged im

Recommended common filter attributes and statements for Css filter attributes and statements Syntax: STYLE = "filter: filtername (fparameter1, fparameter2 ...)" (Filtername indicates the Filter Name. fparameter1 and fparameter2 are filter parameters) Filter description: Alpha: sets the transparency level. Blur: Creates high-speed mobile effects, that is, blur effects. Chroma: Make special colors transparent DropShadow: Creates a fixed shadow of an

Baidu Encyclopedia above the introductionYUV is mainly used to optimize the transmission of color video signal, so that it is backward compatible with old black and white. Compared with the RGB video signal transmission, its greatest advantage is that it takes only a very small bandwidth (RGB requires three separate video signals to transmit simultaneously). where "Y" is the luminance (luminance or luma), which is the grayscale value, and "U" and "V" are the

// Http://blog.csdn.net/android_lee/article/details/6214617 Frame Type options: -I/-keyint -I/-Min-keyint -Scenecut -Pre-scenecut is faster, but the low-precision Image Dynamic detection requires multithreading and is automatically enabled when multithreading is enabled.-B/-bframes -B-adapt: adaptive B-frame determination mode. 0: Disabled; 1: fast; 2: optimized (the speed is greatly reduced when the frame is high). The default value is 1.-B-bias -B-pyramid: allows B frames for reference.-No-ca