The SX1 IS Porting Thread - page 14 - General Discussion and Assistance - CHDK Forum
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The SX1 IS Porting Thread

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Offline pev69

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Re: The SX1 IS Porting Thread
« Reply #130 on: 16 / April / 2009, 05:28:55 »
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Since there's so much talk about RAW here recently, and I haven't bothered to use it (at least yet), I'd like to ask you who use it: is it much advantageous compared to normal (JPEG) pictures? I mean that does using RAW really bring something that is seemingly different/better with a camera like the SX1 (by the eyes of a regular streetwalker :))?

I'm not trying to belittle it or anything, and since this is somewhat off topic, just a short answer (or a link to a good explanation elsewhere) is fine for me :)
« Last Edit: 16 / April / 2009, 05:35:07 by pev69 »
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Offline ilialin

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Re: The SX1 IS Porting Thread
« Reply #131 on: 16 / April / 2009, 06:10:24 »
Very generally, RAW is _all_ the information captured by taking picture, and JPG is part of this information just rendered to 2D RGB matrix. If the rendering process is done internally in cam, you can't restore all the data back. I.e. some two or more sensors captured different values, but in renderer decided that two produced pixels will have equal values, all further image processing will perceive the two pixels as equal.
Thus processing RAW manually may give more intellegent rendering and more naturalistic/artificial image as result. 
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Offline hmaseret

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Re: The SX1 IS Porting Thread
« Reply #132 on: 16 / April / 2009, 07:27:56 »
Hello Im new here, someone can tell me what features about video this realese will have ???

1 ) can I use differente size 1280x720 ?????
2 ) can I change shooter, exposure, etc ?????
3) bitrate ?????


thanks in advance
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Offline fboesch

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Re: The SX1 IS Porting Thread
« Reply #133 on: 16 / April / 2009, 08:22:55 »
Quote from: hmaseret on 16 / April / 2009, 07:27:56
Hello Im new here, someone can tell me what features about video this realese will have ???

1 ) can I use differente size 1280x720 ?????   ---> Answer is: NO
2 ) can I change shooter, exposure, etc ????? ---> Answer is YES for Pictures, NO in Video
3) bitrate ?????  ---> Answer is YES (through different compression --> processed bandwidth)


Additional info:

1) CHDK does modify the "compressing" stuff of the "Video-Feature" (it is not just in this SX1 release, but generally CHDK)...Resolution is still based on the Cam's native feature.
2) As said: Just parameter of Compression on Video Settings...no other "video related parameter" (--> Remember: We are still talking about Digi-Cam's and not Video-Cam's, eventough worlds are coming together :-)
3) --> "Yes"...With setting Default (84) it is about 5MByte/sec with Setting to (1) i came to 400-500kbits/s for a 1920x1080 FullHD Video. But compression artefacts (Squares) are really visible. With Setting (10) I got about 800kbits/sec which is - for me- fine in terms of "artefacts)...

Recommendation: Go to chdk.wikia.com and read the WIKI of the CHDK Feature (in General). This thread is just about "port" the existing CHDK build to the SX1 IS Cam. No specific "features"/extensions are planned. We are working here onto "fixing" some issues, that all features (of the original CHDK) are working.

Cheers
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Offline fe50

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Re: The SX1 IS Porting Thread
« Reply #134 on: 16 / April / 2009, 08:39:38 »
@fboesch
Did you test the SX1's ISO3200 scene mode in combination with the CHDK ISO override and/or the "force flash" feature ?
It'll be interesting whether the speed on the CMOS cam differs from the 4-5 pps of the CCD ones (e.g. SX10)...
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Offline hmaseret

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Re: The SX1 IS Porting Thread
« Reply #135 on: 16 / April / 2009, 08:43:27 »
thanks fboesch
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Offline fboesch

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Re: The SX1 IS Porting Thread
« Reply #136 on: 16 / April / 2009, 09:48:55 »
Quote from: fe50 on 16 / April / 2009, 08:39:38
@fboesch
Did you test the SX1's ISO3200 scene mode in combination with the CHDK ISO override and/or the "force flash" feature ?
It'll be interesting whether the speed on the CMOS cam differs from the 4-5 pps of the CCD ones (e.g. SX10)...

Sure! ....just explain me, which values (for override) should be used?

ISO3200 Mode ... ok.
ISO Override --> ? High? Low Setting?
Force Flash? --> ? Special additional setting?

Thx

________

Edit: Played around (without waiting for specifications) and actually shooting is definately faster than the "default" 4 PPS.... I did now shoot 4-5 always with 5sec in a row and got between 34 - 38 Pictures (within these 5 sec)....so I would say that PPS is on average 7pics/sec...



« Last Edit: 16 / April / 2009, 10:10:29 by fboesch »
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Offline fe50

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Re: The SX1 IS Porting Thread
« Reply #137 on: 16 / April / 2009, 13:50:21 »
Quote from: fboesch on 16 / April / 2009, 09:48:55
ISO3200 Mode ... ok.
ISO Override --> ? High? Low Setting?
Force Flash? --> ? Special additional setting?
________
Edit: Played around (without waiting for specifications) and actually shooting is definately faster than the "default" 4 PPS.... I did now shoot 4-5 always with 5sec in a row and got between 34 - 38 Pictures (within these 5 sec)....so I would say that PPS is on average 7pics/sec...

7pps - cool, that's what i wanted to know...
You can set a low value for ISO override, e.g. ISO80; the images should be significant better, but effective (visible) ISO may be somewhere around 200-300...here you'll find my little test with the SX10.
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Offline fboesch

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ADDING current Alpha to official Trunk
« Reply #138 on: 16 / April / 2009, 15:47:26 »
Hi Moderators/Admins/Heros

On request of phyrephox two days ago, I hereby provide you a "DIFF" for the additional SX1 Part.

It is a DIFF (showing the additions/changes to files) based on trunk730 (original) and trunk730 (with required mods to support SX1).

Modification needs to be done (see DIFF) in

\MakeFile
\include\camera.h
\core\gui.c
\core\kbd.c


Additionally in the ZIP file the ADDED files of folders  \loader\sx1\.. and \platform\sx1\... are included.

Not Included: fi2.inc (keys/IV) and changes to fi2enc.c (suggested by ewvar earlier to show "Firmware 2.1.0.0" when Updating....will be added if PS.FI2 Boot will work)

Changes in fi2enc.c (Line 122-127)

hdr.unk1=0x02460000;
        hdr.id=0x02010000;
        hdr.ch=0;
        hdr.unk2=1;
   hdrsize = 32;
   fi2rec.addr=0x1900;

Thank you if adding them into the official build (Comment: STILL ALPHA! BUT WORKING)

Fredi
« Last Edit: 16 / April / 2009, 16:40:01 by fboesch »
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Offline fboesch

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Re: The SX1 IS Porting Thread
« Reply #139 on: 16 / April / 2009, 15:49:00 »
Quote from: fe50 on 16 / April / 2009, 13:50:21

7pps - cool, that's what i wanted to know...
You can set a low value for ISO override, e.g. ISO80; the images should be significant better, but effective (visible) ISO may be somewhere around 200-300...here you'll find my little test with the SX10.

Good! Then I got the point right :-) I used a "high ISO" Value....(actually 2300 so that effective also 3200 are taken)....will try it with "low ISO" then! :-)
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