#apertus IRC Channel Logs

morning folks!

its austrian national holiday

how did the BBA go?

why not?

We are now integrating the axiom as third camera in our running setup.

if the axiom goes online I will notify you :)

light intensity would have been no problem at all, i tested that yesterday

How can I get the currently set exposure time?

niemand: take a snapshot without specifying the exposure (you need a small patch to cmv_snap3)

goto skip;

this will print current exposure time without changing it

alternatively you can read the sensor registers defining the exposure time (see datasheet) and do the math to convert to seconds

It seems we need 4:2:2 ...

alexML: './cmv_snap3 -z -r' will simply output the sensor registers without changing anything or producing an entire raw

And I don't know if the card supports RGB too

if you need more features, please go ahead and implement them

so we can use it on another capture card

https://github.com/apertus-open-source-cinema/beta-software/tree/master/cmv_hdmi3

alexML: the gain firmware has to wait till I (or somebody) write a test firmware to figure out why the zynq doesn't match the simulation behaviour

no rush, I'm currently trying to figure out some matrix math

then identify the primaries and use that to map to XYZ

what "monitors" do you use to test the hdmi output?

niemand: I use a SmallHD DP6

the atomos devices work too, but they require a special mode

I created a task for the exposure time script so we do not forget it

this is one of the problems with apertus in my opinion

but the microzed doesn't have high-speed transcievers, so no SATA

help make it happen :)

I probably can help with implementing some more resolutions and subsampling later

Spirit532, then we can encode it to an h.264 stream too^^

aside from proper IP being ridiculously pricy

on the fpga

but the microzed is a rather terrible choice for an integrated camera

I'm going to design a camera based on the 7015, probably a module from trenz electronics or the bora from DAVE

I'm going to use the CMV2k sensor instead

Is there any solution to update all scripts?

what good is another proprietary solution?

and even if it is, I want to implement all features sought after in a camera of this price range(~$1k), rather than dividing it into silly models like socanikon do

we do what we want, we aren't driven by profit charts and the responsibilities before a board of 850 directors and 300 CEOs

looking forward to your FOSS/OH camera based on a Trenz or DAVE module ...

The black offset is something I haven't done previously in my attempts

if you shoot dark frames, it usually is

so if you get clipped shadows, try lowering it

the 128 make perfect sense for raw recording, but for HDMI output, you probably want it to clip on both ends

yes, the 128 in set_wb.py subtracts it

I'd like to run a test with the Shogun (which interprets 16-235) to compare to what I see here

just tell me what parameters/commands I should run and what to capture

if you have an IT8 chart and a tungsten light, run the command I've pasted above, with set_wb.py from https://dl.dropboxusercontent.com/u/4124919/bleeding-edge/apertus/set_wb.py and record a single frame in regular HDMI mode (not UHD) and a raw12 snap; the beta should be RCN-calibrated

i.e. what I would like to know is if we should separate even and odd columns when averaging them

yeah, okay, so even/odd column doesn't matter for the black columns at all

median of 16 values would probably be best (as it will not be influenced by hot pixels), but I guess it's a lot harder to compute than mean, on FPGA

so probably it's best to ignore them and average e.g. 6 + 6 columns

that would suggest that the sensel discharge even with the electronic shutter closed, very interesting

s/why/how/

also, the 8th column is brighter than the others on CMV

does the canon sensor allow to switch the black columns on and off?

I know how to tweak the size of the top black bar (smaller or much larger), but no idea about the left one (which caused the issue)

good night

Bertl_oO: this is a scene that caused trouble in Canons: https://dl.dropboxusercontent.com/u/4124919/bleeding-edge/apertus/black-columns-scene-light-test/borderlamp.jpg

and from some dark/gray/clipped frames:

https://dl.dropboxusercontent.com/u/4124919/bleeding-edge/apertus/black-columns-scene-light-test/black-columns-grayframe.png

so there is some influence, but more like a global effect; on Canons, it was much more obvious and only on the lines with the strong light source

anyway, if you average the first and last 6 columns, those seem to have no influence from the scene