apertus° IRC logs

2019/02/16

Timezone: UTC

01:40

aombk2

joined the channel

01:44

aombk3

left the channel

04:03

RexOrCine

changed nick to: RexOrCine|away

04:07

jaswanth_rongali

left the channel

04:36

Alpha

joined the channel

04:36

Alpha

Hi!

04:41

Alpha

Hi! I was interested in GSOC 2019, T763 opencine project. I had some trivial questions regarding the T872 C/C++ Challenge. I would be glad if somebody is willing to help me out.

04:43

Alpha

I opened the raw12 file in buffer (c++) and seperated the 4 channels then print it. It seems it print garbage value/unreadable characters.

04:44

Alpha

If I convert the characters to integer, it print values which are greater than 255. The values should be between 0-255 right?

04:45

Alpha

Maybe I didn't properly converted it into 8-bits.

04:46

Alpha

To get 8-bits from 12-bits of each channel, should I chop-off the 4 least significant bit or most significant bit?

04:46

Alpha

Thank you.

05:48

Alpha

left the channel

05:48

Alpha

joined the channel

05:48

Alpha

left the channel

06:13

BAndiT1983|away

changed nick to: BAndiT1983

06:14

BAndiT1983

hi rohan_ and Alpha, please take a look at the image in our wiki -> https://wiki.apertus.org/index.php/RAW12

06:16

BAndiT1983

you have to split the sensel data, which is greater than 255 (8bit), as it is 12bit (4096), then you can convert it by removing LSB (least significant bits)

06:17

BAndiT1983

also endianess is important, if the final data is garbage, then it's probably has to be swapped

06:34

alexML

you could also convert with a nonlinear curve - the end result will look nicer that way

06:34

alexML

(this could fit into "Additional points")

06:57

Bertl_zZ

changed nick to: Bertl

06:57

Bertl

morning folks!

07:00

BAndiT1983

changed nick to: BAndiT1983|away

07:24

Alpha

joined the channel

07:24

Alpha

@BAndiT1983 and @alexML Thanks a lot.

07:25

Alpha

@Bertl Good morning.

07:25

Alpha

@alexML What do you mean by convert with a non-linear curve?

07:27

Alpha

@BAndiT1983 as for the endianess, should I swap each binary bits (reverse it) or only the MSB and LSB (where rest remain unchanged).

07:27

Alpha

Thank you.

07:27

Alpha

left the channel

07:28

Alpha

joined the channel

07:49

Bertl

off for now ... bbl

07:49

Bertl

changed nick to: Bertl_oO

07:59

rohan_

joined the channel

08:01

rohan_

@BAndiT1983 Thanks! Understood

08:03

rohan_

@alexML Ya, I was thinking about the ways it could be scaled down, which would make the image more accurate.

08:04

rohan_

Will try this approach too!

08:08

rohan_

left the channel

08:08

Alpha

left the channel

08:57

BAndiT1983|away

changed nick to: BAndiT1983

08:58

BAndiT1983

Alpha, you have to rotate bytes of course, 16bit or 32bit have to be rotated accordingly, as they require different approaches

09:04

se6astian|away

changed nick to: se6astian

09:09

BAndiT1983

https://i.stack.imgur.com/uB92m.png

10:26

BAndiT1983

changed nick to: BAndiT1983|away

10:29

supragyaraj

joined the channel

10:37

supragyaraj

left the channel

10:40

supragya_vpn

joined the channel

11:11

BAndiT1983|away

changed nick to: BAndiT1983

11:18

supragya_vpn

hello BAndiT1983

11:18

supragya_vpn

I have seen quite a few students trying C++ challenge

11:19

supragya_vpn

11:22

BAndiT1983

hi supragya_vpn

11:23

BAndiT1983

yep, will be a bigger job to check all the entries, if so many will be committed

11:23

supragya_vpn

there are already 5-8 students for frameserver

11:23

supragya_vpn

11:23

BAndiT1983

am currently at the hub ;) there are 3 of us working together on different topics

11:23

supragya_vpn

o.0

11:28

siddhantsahu

Hi supragya_vpn BAndiT1983

11:29

siddhantsahu

I am getting this issue of OpenCL when building the master branch of OpenCine

11:32

BAndiT1983

hi siddhantsahu, if it's a bigger log, then please copy to pastebin

11:36

siddhantsahu

https://www.irccloud.com/pastebin/6WIJdbBa/

11:38

BAndiT1983

you have to install OCL module for your system, which linux do you use?

11:38

siddhantsahu

I ran ./env_setup.sh and have all dependencies installed

11:38

BAndiT1983

interesting, supragya_vpn your turn, as you have implemented this

11:38

siddhantsahu

Ubuntu 16.04 LTS

11:38

BAndiT1983

;)

11:45

supragya_vpn

hmm

11:45

supragya_vpn

its cmake error

11:46

supragya_vpn

the env_setup thingy is for insstalling deps

11:46

supragya_vpn

the cmake is called from a wrong pwd i guess

11:47

siddhantsahu

I called "cmake" from within the "build" directory

11:48

supragya_vpn

can you post your exact command?

11:49

siddhantsahu

cmake -DCMAKE_PREFIX_PATH=$HOME/Qt/5.12.1/gcc_64/lib/cmake/ ../

11:49

supragya_vpn

hmm weird

11:49

supragya_vpn

that should work

11:50

siddhantsahu

I also have OpenCL installed by running "sudo apt install ocl-icd-opencl-dev"

11:51

siddhantsahu

I can also locate the libOpenCL.so at /usr/lib/x86_64-linux-gnu/libOpenCL.so

11:51

supragya_vpn

what do you get if you ls ../

11:53

BAndiT1983

you don't need this slash at the end

11:53

siddhantsahu

A "bin" directory and CmakeListCache and the MakeFile

11:56

supragya_vpn

idk if that is right

11:56

supragya_vpn

doesn't seem right

11:57

BAndiT1983

remove slash

11:57

supragya_vpn

https://www.youtube.com/watch?time_continue=9&v=Rpq_ItPHFx8 in case you dont already know this

11:58

siddhantsahu

Yes I have watched this video and followed the instructions but still doesn't seem to build for me

11:58

rohan_

joined the channel

11:58

siddhantsahu

Also tried to build using Qt, get the same CMake errors of OpenCL

11:59

supragya_vpn

hello rohan_

11:59

rohan_

hi supragya_vpn

11:59

supragya_vpn

seems like very openCL related issue yes

12:00

siddhantsahu

This guy gets the same error as me https://www.bountysource.com/issues/49541024-links-to-target-opencl-opencl-but-the-target-was-not-found

12:00

siddhantsahu

Says to upgrade the CMake version

12:01

supragya_vpn

is clinfo returning garbage?

12:01

siddhantsahu

I am using CMake version 3.5.1

12:01

supragya_vpn

https://askubuntu.com/questions/850281/opencl-on-ubuntu-16-04-intel-sandy-bridge-cpu

12:02

supragya_vpn

oh so... that's distribution issue with u... not much help here unfortunately on that end

12:02

supragya_vpn

try a clean installation if you can

12:03

siddhantsahu

Yes OpenCL is configured properly on my machine

100

12:03

supragya_vpn

off for a meeting... bbl

101

12:04

rohan_

I had a question:- the raw12 file at <http://files.apertus.org/AXIOM-Beta/snapshots/portraits/portrait-gainx2-offset2047-20ms-02.raw12> has a size of 1,88,74,624 bytes. But the file should have a size of 4096 x 3072 x 12 = 15,09,94,944 bits =1,88,74,368 bytes.

102

12:05

rohan_

why is there a small excess of memory?

103

12:05

Bertl_oO

the register set is added at the end of the raw image (with the -r option)

104

12:06

Bertl_oO

this is 128 sensor registers with 16bit each

105

12:07

rohan_

got it! Thanks Bertl_oO

106

12:07

supragya_vpn

left the channel

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12:08

Bertl_oO

you're welcome!

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12:11

rohan_

left the channel

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12:16

BAndiT1983

changed nick to: BAndiT1983|away

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13:01

BAndiT1983|away

changed nick to: BAndiT1983

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13:51

Dev

joined the channel

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13:53

Dev

Hello all ! , i was also getting errors while rebuilding OC , but these are Cmake issues -> https://pastebin.com/K7gyQLQr

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13:55

siddhantsahu

Dev: I think these are just warnings

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13:56

siddhantsahu

Try running make -j4 after this it should work fine

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14:00

Dev

okay let me see

116

14:00

Dev

thanks

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14:01

Dev

last time i built OC , it was also giving opencl error ,

118

14:01

Dev

i remeber , i solved it with some commands

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14:01

siddhantsahu

Dev: Even I am getting OpenCL error

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14:02

siddhantsahu

This error in particular https://www.irccloud.com/pastebin/6WIJdbBa/

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14:04

Dev

https://askubuntu.com/questions/850281/opencl-on-ubuntu-16-04-intel-sandy-bridge-cpu , have u tried basic installation command

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14:08

Dev

left the channel

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14:10

Dev

joined the channel

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14:11

Dev

Finally , built it , thanks sindhantsahu ,

125

14:11

siddhantsahu

Dev: Yes I ran the basic installation, still doesn't build for me.

126

14:12

Dev

They were just warning really :D

127

14:12

siddhantsahu

Great! It successfully build for you.

128

14:12

siddhantsahu

I am still getting those OpenCL errors.

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14:15

Dev_

joined the channel

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14:16

Dev_

I will tell u if I got something relevant , sindhantsahu

131

14:16

Dev_

To opencl

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14:16

Dev

left the channel

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14:20

Dev_

left the channel

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14:55

aombk3

joined the channel

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14:56

Y_G

joined the channel

136

14:57

Y_G

Hi,Regarding the C/C++ task for GSOC'19 ,to convert 12 bit pixels to 8 bit,can we just ignore the lsb's?

137

14:59

aombk2

left the channel

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15:05

Y_G

sorry,Just read the logs now,Got the answer

139

15:56

BAndiT1983

@all who tries to build OC, no problem to build it under ubuntu 18.10, installed QT, executed cmake command line from wiki (system-dependent adjustments applied)

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15:56

BAndiT1983

used Qt version 5.12.1

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15:57

BAndiT1983

only opencl-headers package was missing on the system to find cl/cl.hpp, other than that no further errors occurred

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15:58

siddhantsahu

BAndiT1983: Yes I am getting this opencl headers missing error