[Bf-committers] patch #21750: Vectorscope and luma/color waveform for image view

Paolo Ciccone phciccone at gmail.com
Fri Mar 26 00:53:46 CET 2010

Xavier, that looks very promising. For the VScope, would it be possible to
to have more clear demarcation of each color area? It would be also helpful
to have the standard line for the skin tone, the single most important
feature of a VScope. Lastly, VScopes usually have a marker of some sort,
like a square that shows the limit of the usable range for each color.
Basically, when calibrating a monitor or a camera with a DSC chart your R,
G, B, M, C, Y would optimally "fall" within those squares. Beyond those the
colors start getting oversaturated. Here is an example of what I mean:

Excellent work!

Paolo Ciccone

On Wed, Mar 24, 2010 at 9:57 PM, Xavier Thomas <xavier.thomas.1980 at gmail.com
> wrote:

> Test and feedback much appreciated :)
> Screenshot: http://www.pasteall.org/pic/show.php?id=2102
> It works by sampling (number of samples configurable) the image and
> drawing a point cloud of those sampled data. An
> option to use full resolution is available but is slow with high res
> image and both waveform and vectorcope pannel
> expanded)
> Saving the statistic data was too much data and too slow, if using
> subsampled data is not ok for preview. Calculating
> an image of the scope and only displaying it as a opengl texture seems
> be the best way to go (more like the sequencer
> scopes). For what it is worth: after effect seems to use a similar
> subsampling method.
> Further (if design is ok):
> -some speed optimisation
> -polish aesthetic
> -zoom in/out with out of range float support
> -colorspace linear and srgb (for histogram too)
> https://projects.blender.org/tracker/index.php?func=detail&aid=21750&group_id=9&atid=127
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