search for: chroma

...have been bumbling around with r for years now and still havent come up with a solution for plotting reliable graphs of relationships from a linear regression. Here is an example illustrating my problem 1.I do a linear regression as follows summary(lm(n.day13~n.day1+ffemale.yell+fmale.yell+fmale.chroma,data=surv)) which gives some nice sig. results Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) -0.73917 0.43742 -1.690 0.093069 . n.day1 1.00460 0.05369 18.711 < 2e-16 *** ffemale.yell 0.22419 0.06251 3.586 0.000449 *** fmale.yell 0.2587...

https://bugs.freedesktop.org/show_bug.cgi?id=82255 Priority: medium Bug ID: 82255 Assignee: nouveau at lists.freedesktop.org Summary: [VP2] Chroma planes are vertically stretched during VDPAU playback Severity: normal Classification: Unclassified OS: All Reporter: emil.l.velikov at gmail.com Hardware: Other Status: NEW Version: unspecified Co...

http://bugs.freedesktop.org/show_bug.cgi?id=21869 Summary: Chroma mismatch using XV Product: xorg Version: 7.4 Platform: x86 (IA32) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Driver/nouveau AssignedTo: nouveau at lists.freedesktop.org...

...enerate a how do I set the h,c, and l values such that the significant, positive residuals appear different on a grayscale printer from significant grayscale residuals. The challenge as I see it is that one can only distinguish the positive and negative residuals with the hue/. Varying the chroma and the luminance only affect the distinctions between large and small and significant and non significant. But my positive and negative residuals are both large (absolutely) and significant, meaning that they will have the same chroma and luminosity, but different hues. I guess the key he...

Hi All, I'm trying trying to draw a colour wheel (a slice of hcl space) in R. Running the code below doesn't give me what I expect - there's some oddly bright colours of the wrong hue around c(0, 0) and I see three coloured circles (a small magenta, a medium sized yellow and a large cyan). Am I doing something wrong or is there a bug in the hcl code? (Also any suggestions for

Hello, I have improved quality for -l4 and -l5 high compression settings.These settings are now really better and very competitive, I now prefer them compared to x265 (HEVC). Update at: http://nhwcodec.blogspot.com/ I am also working on -l6 quality setting, I can simply increase quantization for it but I am not totally satisfied with this solution for now... Looking for more advanced processing

...i, The documentation for the libtheora API is a little bit sparse - for example, information about whether yuv_buffer structs should be managed by the user or the library is missing. From talking to derf, and from what I can see in the example files, the user allocates the struct but not the luma/chroma buffers on decode; and the user allocates both the struct and the luma/chroma buffers on encode. I've made some small additions to the documentation explaining this. Should I send these changes? If so, do you have any guidelines for patch format? If it'll be useful, I may continue to add...

...ssion, and yes, it hasn't been decided on yet).. > The fields are going to be the same for RGB, so why make it twice as much > work to implement. Because the fields are /not/ going to be the same for RGB. RGB has resolution, framerate, prehaps even interlace and aspect ratio... But chroma subsampling? no. And this is where much of the complexity comes. If we were to combine them, we would be, essentially, doing it something like this: Value Meaning 0 RGB 1 YUV444 2 YUV422 3 YUV420 4 YUV411 ..... And then spend an additional field on bits/channel...

...ssion, and yes, it hasn't been decided on yet).. > The fields are going to be the same for RGB, so why make it twice as much > work to implement. Because the fields are /not/ going to be the same for RGB. RGB has resolution, framerate, prehaps even interlace and aspect ratio... But chroma subsampling? no. And this is where much of the complexity comes. If we were to combine them, we would be, essentially, doing it something like this: Value Meaning 0 RGB 1 YUV444 2 YUV422 3 YUV420 4 YUV411 ..... And then spend an additional field on bits/channel...

Hi , I see in trunk that ffmpeg2theora now has Chroma settings , that it is a new good thing that justify a new release of ffmpeg2theora. _________________________________________________________________ Dale rienda suelta a tu tiempo libre. Mil ideas para exprimir tu ocio con MSN Entretenimiento. http://entretenimiento.msn.es/

This also includes, other non raw formats... http://www.fourcc.org/codecs.php "fourcc" 's of rgb types http://www.fourcc.org/rgb.php raw yuv formats only http://www.fourcc.org/yuv.php Registered fourcc codecs http://www.microsoft.com/whdc/archive/fourcc.mspx Enumeration of actual types that are used in directshow (bottom of page)

...colour of each grid location directly, rather than providing a numerical matrix and a 1D-colour scale (heatmap, image, levelplots,NeatMap...). I'm surprised I haven't found anything simple with RSiteSearch, help.search, net. I'd like to use this function to encode one variable as "chroma" and a second as "luminance" (hcl colour space), so that the two variables can be visualised in a single heatmap (the variable are fold-change and a q-value, a significance measure). If anyone has any thoughts/warnings to offer re this idea then I'd love to hear them (it must hav...

...n and throwing it to the video hardware. Furthermore, we aren't going to put artificial limitations on future video codecs based on current hardware or the limitations of obsolete software. If a codec finds it useful to encode, say, super high definition interlaced video which encodes one chroma for every luma on every other line, such that one interlaced scan includes chroma and the next doesn't, then it should be able to decode to the same raw YUV spec as everyone else.. .. and if another codec supports that YUV layout, or hardware, etc then it should be able to, directly. If it...

Suppose we start with data("Titanic") mosaic(Titanic, shade = TRUE) How do I combine the dashed box contours of shading_Friendly to indicate negative residuals, with three levels of gray: dark for abs(Pearson Resid) > 4, lighter for 4 > abs(Pearson Resid) > 2, and lightest for bs(Pearson Resid) < 2 ? Thanks, Michael ______________________________________________

...art in average, but I have an error on some few images, I don't think I contradict the compression and information theory principles, I think it is more a corner case that I did not see for now and so that I don't handle, but it takes a lot of time... I'll also have to better handle the chroma channels and notably add chroma from luma technique. Some people also tell me that the priority now is to adapt NHW to any image size, but actually this is the boring task for me currently, and I am a little reluctant for now. All that to let you know that I really like more to work on my codec,...

...verage, but I have an error on some few images, I don't think I contradict the compression and information theory principles, I think it is more a corner case that I did not see for now and so that I don't handle, but it takes a lot of time... I'll also have to better handle the chroma channels and notably add chroma from luma technique. Some people also tell me that the priority now is to adapt NHW to any image size, but actually this is the boring task for me currently, and I am a little reluctant for now. All that to let you know that I really like more to work...

...noring some of the older FourCC which are rarely used) implement a two-line system with no more than four pixels in each "block". Thus, we can implement this very simply. Y-U-V is always provided in that order (wether planar or packed), so what we must encode is on which luma pixels chroma data is provided for. 8 pixel block can have 1, 2, 4, or 8 chroma samples, so this should be our first 2-bit field, then (only applicable if 2 or 4) we can stagger chroma in both x&y, then we can split chroma in both x&y, resulting in the following table of valid possibilities (*=doesn&...

Here's a shot at a list of fields: // High level data Displayed Width&Height Stored Width&Height Aspect Ratio (Fractional) Frame Rate (Fractional) FourCC (Optional, set to zero to use values below) Colorspace (enum, R'G'B', Y'CbCr, JPEG (not sure proper name), etc) // Subsampling data U Channel X Sample Rate (Fractional) U Channel Y Sample Rate (Fractional) U Channel

...> I have an error on some few images, I don't think I contradict the > compression and information theory principles, I think it is more a corner > case that I did not see for now and so that I don't handle, but it takes a > lot of time... I'll also have to better handle the chroma channels and > notably add chroma from luma technique. > > Some people also tell me that the priority now is to adapt NHW to any > image size, but actually this is the boring task for me currently, and I am > a little reluctant for now. > > All that to let you know that I reall...

...* A problem with motion vectors : - How motion vector are decoded ? In the specification, it is said : "Each component can take on integer values from -31 . . . 31, inclusive, at half-pixel resolution, i.e. -15.5 . . . 15.5 pixels in the luma plane. For each sub- sampled axis in the chroma planes, the corresponding motion vector component is interpreted as being at quarter-pixel resolution, i.e. -7.75 . . . 7.75 pixels. The precise details of how these vectors are used to compute predictors for each block are described in Section 7.9.1. " But nowhere, decoded values are...