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#apertus IRC Channel Logs

2019/02/21

Timezone: UTC


23:42
danieel
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danieel
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23:58
BAndiT1983
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00:06
danieel
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danieel
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Y_G
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06:28
se6astian|away
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06:36
Bertl_zZ
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06:36
Bertl
morning folks!
06:38
futarisIRCcloud
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06:40
se6astian
good day
07:02
BAndiT1983|away
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07:40
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niemand
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niemand
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08:02
parimal
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08:07
parimal
In task T872, "Output the intensity values of the first 5x5 pixels (square tile) R, G, G, B channels", what format should the output be? Hexadecimal or decimal?
08:08
Bertl
I'd prefer hexadecimal
08:09
parimal
Ok
08:11
niemand
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parimal_
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parimal
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09:05
Bertl
off for now ... bbl
09:05
Bertl
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09:10
se6astian
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09:23
Y_G
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09:38
parimal_
May I compare the intensity values with someone to see if I am going in the right direction?
09:44
se6astian|away
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09:55
kritika
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09:56
se6astian
parimal_: you can create a kind of preview image then it should be easy to tell
10:00
parimal_
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kritika
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10:55
parimal
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10:55
parimal
okay
11:18
BAndiT1983
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BAndiT1983|away
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parimal
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12:34
BAndiT1983
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BAndiT1983|away
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12:57
parimal
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13:00
parimal
In ppm file format, should the image data be in decimal or hexadecimal? On wikipedia it is given in decimal
13:09
BAndiT1983
parimal, file specification explains what has to be used, please check one to see how the format is structured, not only wiki
13:09
BAndiT1983
http://netpbm.sourceforge.net/doc/ppm.html
13:09
BAndiT1983
there it is explained clearly
13:09
parimal_
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13:10
BAndiT1983
also here it tells which format to use -> davis.lbl.gov/Manuals/NETPBM/doc/ppm.html
13:11
parimal_
thanks a lot :)
13:11
BAndiT1983
thank not me, thank google
13:12
parimal
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13:13
parimal_
Yeah sorry should have researhed properly before pinging here
13:14
BAndiT1983
don't rely too much on wiki, official (sometimes reverse-engineered) file specifications are more important
13:15
parimal_
alright will keep that in mind
14:07
BAndiT1983
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15:13
se6astian
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15:18
RexOrCine|away
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16:18
parimal_
Ok, I converted the 4 channels to a "plain" ppm image, using decimal values for every pixel, and I am getting the correct image
16:18
parimal_
but using the "raw" ppm format, i.e using binary instead of decimal, i am getting a greyish image
16:22
parimal_
Can someone explain why this is happening? Or am I missing something?
16:23
Bertl_oO
you are probably missing something :)
16:33
parimal_
If the first red pixel value is 8, in the raw ppm file, this would translate to 1000 0 0 in the red ppm image data, right? Since blue and green are 0 each and 8 is 1000 in binary
16:38
parimal_
Here is the plain ppm file I am getting for red channel - https://pasteboard.co/I2dxNg3.png
16:38
parimal_
And this is the raw ppm image, using decimal values as stated - https://pasteboard.co/I2dy5q1.png
16:39
parimal_
binary* not decimal ^
16:41
se6astian|away
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parimal_
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19:20
RexOrCine
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intrac_
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intrac
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20:13
Bertl_oO
off to bed now ... have a good one everyone!
20:13
Bertl_oO
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21:27
se6astian
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21:48
BAndiT1983|away
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22:57
Y_G
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