2015-02-26

Free OpenFx plugins for Resolve

Since Resolve (and the free Resolve Lite) doesn't support one OpenFX method,
the Openfx-Misc set of free plugins needed an update.
After a discussion in the Blackmagic forum, this has now happened.
I was able to compile them without any issues and they do show up in my Resolve 11 Lite on MacOS.

On a side node: openfx_yadif (for deinterlacing) is still crashing in export after 5-20 frames. It does work in the color tab. Even with playback running.

2015-02-10

Searching for a monitor

I'm thinking about a wide color gamut display for Color Grading in Blackmagic design - Davincy Resolve.
It will also be used in Final Cut Pro X.
...and VLC. ;)

Options


The HP Dreamcolor Z27x (720eur 2048 x 1556)
sems to be more affordable compoared to
the EIZO ColorEdge CG247-BK (1500eur 1.920 x 1.200)
or EIZO ColorEdge CG277-BK (2000eur 2.560 x 1.440).
You save 100-200eur for the calibration device but both need the Ultrastudio Mini Monitor as an added cost factor.

NOT the smaller Z24x (400-550eur 1920x1200) because
* that doesn't calibrate without a PC like the Z27x does and the software only exists for Windows.
(http://www.liftgammagain.com/forum/index.php?threads/new-hp-dreamcolor-monitors-4k-capable.2694/page-6)
* it doesn't have the same kind of panel or the same precision as the Z27x
http://www.liftgammagain.com/forum/index.php?threads/new-hp-dreamcolor-monitors-4k-capable.2694/page-8

100% sRGB Coverage
100% Adobe RGB Coverage
100% BT. 709 Color Coverage
99% of DCI-P3 Coverage

Setup


I'm planning to use the
Blackmagic Ultrastudio Mini Monitor
to output 10bit 4:2:2 YUV
since the newer Z27x supports the DreamColor Engine with YUV and not only RGB now and the Mini Monitor is limited to YUV only.

Calibration


One problem I have is that the cheapest, supported calibration device (HP DreamColor Calibration Solution(B1F63AA)) for the Z27x seems to be half the price of the entire monitor (200eur). :/

A Spider4Pro or Spider4Elite that cold also calibrate my other displays and laptops would not work with the internal LUT of this display. :/
On the other hand the  B1F63AA is much more accurate then the Spider will ever be.


Evaluation


Z27x
720eur + 100eur + 150eur = 720eur
  • less quality control
  • no sun shade
  • 4K downscaling, 1:1 4 corners + center + dynamic panning
  • 2 DisplayPort 1 HDMI
  • 100% sRGB Coverage
    100% Adobe RGB Coverage
    100% BT. 709 Color Coverage
    99% of DCI-P3 Coverage
     

CG247-BK
1500eur + 100eur = 1600eur.
  • 100% sRGB
  • 99% AdobeRGB
  • 100% Rec709
  • 95,4%DCI
CG277-BK
2000eur + 100eur = 2100eur.
  • 4K downscaling and 1:1 4 corners
  • 100% sRGB
  • 99% AdobeRGB 
  • 100% Rec709
  • DCI: 93%


2014-12-16

OpenBCI

After doing some initial ECG experiments with a simple Arduino shield,
I got my OpenBCI from Kickstarter just in time for 31C3.
For the time being, I'll use this blog posting to collect some links and notes until I get things sorted out.
Much of the OpenBCI documentation on the official site and source code repository is still unwritten,
so I need to do a lot of hunting, gathering, guessing and experimenting.

Results so far:
  • I see clear signals with lots of SNR for muscle movements and eye movement
  • The OpenBCI_GUI app has way too little in the ways of signal analysis.
  • I'm having trouble using my Olimex EEG designs in BrainBay with the OpenBCI


Getting started
People/Talks/Blogs

SW

HW

Headware

2014-11-26

ECG/EOG/EEG experiments

I'm a backer of OpenBCI  but they still haven't delivered.
(Other people have, 3 days ago)
So I just ordered myself a "Shield-EKG-EMG" from Watterott.

I managed to get my heatbeat.
(That's the easiest you can do.)
Next step shall be tests of Electro Oculography (electric eye tracking).








Just some notes for myself:



EOG

Signal is in the range of 1mV peak to peak .
Eye-blinking artifact is very strong.
50Hz line noise must be removed (of cause). (notch fiter)
low-frequency cutoff to 0.02 Hz
high-frequency cutoff 50Hz


2014-11-21

Accuracy tesing 3D scanner



I want to know how well the Sense 3D scanner together with the Skanect software (since the Sense software only works on one computer per scanner and is pretty much crap without CUDA) captures mechanical dimensions.
Both in terms of absolute dimensions in millimeters (scaling of the entire part) and in terms of relative sizes of components to each other.

As a first test I scanned my camera. It's a small object and I had an error of about 10mm for a 130x70mm part in all 3 dimensions. Not very good.


Then I scanned my face.
Cleaned up that scan in Skanect, then NetFabb, then Meshlab (because the free NetFabb version doesn't allow you to fix some errors unless you buy the pro version).
Then imported that mesh into Geometric Design (my CAD program with 3D scanner and -printer integration).
Designed a mask with no allowance (not even under the nose or in the eyes).
Printed that mask on my Ultimaker II using default settings.
result?  It fits my face perfectly!

I'm currently waiting for a FabScan Cube to also scan small objects, where the Sense failes and am waiting for Skanect to support my higher resolution Kinect V2 for Windows. (I'll try the libfreenect2 software on MacOS/Linux next week.)




2014-11-17

Im Labyrinth der Telekom


Ich habe einen Business-Tarif. 3 SIM-Karten, nutzt viele Daten (>2GB), nutze ausgiebig die Telekom-Hotspots in den DB Zügen/Bahnhöfen/Mc Donalds, LTE ist mir egal, iPhones auch, telephoniere kaum 5 Minuten im Monat und verschicke keine SMS.
So weit so einfach.
....bis man mal auf der Website von T-Mobile seinen Tarif vergleichen und ändern will.




Ok, ich kann nicht mehr.
nach Wochen kann ich in diesem verd****** Labyrinth von Website bei T-Mobile mich weder einfach mal als Kunde einloggen,
noch meinen Tarif ändern
noch die Hälfte der Tarife ohne "nur für Neukunden",
weder mit "Mit Surfstick", noch "Mit Tablet zum Basic-Tarif"  noch "Mit Tablet zum Premium-Tarif"
 überhaupt sehen.
Geschweige denn mal sinnvoll vergleichen.
Man wird mit seitenweisen PDF Formularen zum ausdrucken ,ausfüllen und per Brief schicken belästigt um sich im Business-Bereich einzuloggen obwohl man schon 3 Logins hat.
Ich will keinen Lieferstatus für ein verd***** iPhone, LTE interessiert mich nicht die Bohne,
es interessiert mich nicht was ihr für bunte Preise gewonnen haben wollt,
ich will nicht noch ein neues Handy,
ich will keine @t-mobile oder @t-online Addresse,
kein Adressbuch, kein Spotify und keinen Kalender!
Ich will einfach nur meinen Tarif für meine Nutzung mit den aktuellen Angeboten vergleichen und bequem ändern können, wenn mir das Vorteile bringt.
Und zwar ohne mich erst zu Arbeitszeiten in's Auto setzen zu müssen, zu irgend einem Laden zu fahren wo ich stundenlang warten muss und dann nur einzelne Details von Tarifen an den Kopf geworfen zu bekommen ohne übersichtlich die Kosten mit allen für mich nötigen Optionen gegenüberstellen zu können.
Das kann doch nicht so schwer sein das Kerngeschäft eines Mobilfunkanbieters zu betreiben.
Jeder schmierige Versicherungsvertreter kriegt das besser hin!