SX110IS - howto start porting

axu89

lucmovel
My experience with MD isn't going so well. Which script are you folks using, and what parameters?

I use https://chdk.setepontos.com/d/471/109
Default script parameters work, and you can turn trigger delay to 0. The script has nice read me -file, read it 😀

Obihoernchen

axu89

lucmovel
My experience with MD isn't going so well. Which script are you folks using, and what parameters?

I use https://chdk.setepontos.com/d/471/109
Default script parameters work, and you can turn trigger delay to 0. The script has nice read me -file, read it 😀

I also use this Script, because its the BEST and FASTEST!
You can find it also in Hints at the wiki http://chdk.wikia.com/wiki/SX110IS

Obihoernchen

Here are some practical test with MD on SX110IS:

ISO and Focus isn't right everytime^^

chdkj

@axu89
Wow! Cool. Camera Control via a heli rc... 😀

@Obihoernchen
Don't kill the rabbitt! Did you throw a potato?

PhyrePhoX

Obihoernchen
Here are some practical test with MD on SX110IS:

don't know if you noticed already, but i spotted a big fat badpixel in some of your images.

😁

Obihoernchen

chdkj
@axu89
Wow! Cool. Camera Control via a heli rc... 😀

@Obihoernchen
Don't kill the rabbitt! Did you throw a potato?

xDDDD No it was a stone^^, but i dont throw very far so the guinea pig (not rabbit) doesn't get hurt^^

@PhyrePhoX I know but i cant fix it ARGH 🙁

neighbours.... 😉

Inferno

I'm still puzzled by DNG issue. When you do RAW to DNG with DNG4PS-2 everything is good but when camera does DNG it makes that strange blue haze. I don't think it's the problem with color matrix because as you can see from the picture I attached it's perfect. Little bit yellowish by default but still good. I think it's more related to badpix script itself or the way chdk converts.

reyalp

The badpixel script would not cause a haze. All it does is make a list of pixel the canon firmware set to below black level. CHDK takes this list an interpolates over those pixels.

The only conversion CHDK does to the actual data is reversing the byte order (as required by the DNG spec for 10 and 12 bit data). You'd see more than a haze if this was going wrong 😉

Obihoernchen

one question:

@chdkj

do we have the advanced version with all 3 buffers? https://chdk.setepontos.com/d/471/161

fe50

Obihoernchen
do we have the advanced version with all 3 buffers? https://chdk.setepontos.com/d/471/161

CHDK source code says yes... have a look to /platform/sx110is/sub/100b/lib.c (e.g. online):

void *vid_get_viewport_live_fb()
 	{ void **fb=(void **)0x21a0; //ROM:FFC285D0 dword_FFC285D0  DCD 0x21A0, look also at ROM:FFC27FF0
 	   unsigned char buff = *((unsigned char*)0x2014); //ROM:FFC285C8 dword_FFC285C8  DCD 0x2014    , look also at ROM:FFC27FA0
 	    if (buff == 0) buff = 2;  else buff--;
 	    return fb[buff];  	}

Obihoernchen

fe50

Obihoernchen
do we have the advanced version with all 3 buffers? https://chdk.setepontos.com/d/471/161

CHDK source code says yes... have a look to /platform/sx110is/sub/100b/lib.c (e.g. online):
[code]void *vid_get_viewport_live_fb()
{ void **fb=(void **)0x21a0; //ROM:FFC285D0 dword_FFC285D0 DCD 0x21A0, look also at ROM:FFC27FF0
unsigned char buff = *((unsigned char*)0x2014); //ROM:FFC285C8 dword_FFC285C8 DCD 0x2014 , look also at ROM:FFC27FA0
if (buff == 0) buff = 2; else buff--;
return fb[buff]; }[/code]

thx
I only dont have the knowledge 🙁
I also thinked so, because MD is very fast 😉
Great work chdkj!

chdkj

What should I say? Some pathetic like: "A man has to do what a man has to do..." 😉))

It's actually not my work. There are some people around, willing to make things running and to share their knowledge and results with others. Thats is all the work of those people. What I did, is to made a port based on those excellence. Porting a new camera is more the work of a book keeper (no insult and even not my job and I do not erode the work of other porters) than the work of a developer. This might be sound curious especially to non-developers but it's true. And: one will need some knowledge of a developer to make a successful port.

To be short: I wouldn't miss the chance, to say Thank You to those people, who made that possible.

A reason more to attend the coming 26C3 and have a beer together...

Cheers!

chermucsnis

Hello!

I'm trying to use DNG2PS to convert RAW to DNG, but the resulting picture has a different RGB histogram aspect comparing to the camera's JPEG... In fact, the resulting DNG is yellowish comparing to the JPEG. (I've selected the correct SX110IS color profile in DNG2PS, and left WhiteBalance in Auto)

Is this related to this Color Matrix problem you are talking about, or it's related to DNG2PS settings?

Thank's in advance.

chermucsnis

In the link below there is a multi target picture taken with SX110. Maybe it can help to improve the color matrix.

http://www.imaging-resource.com/PRODS/SX110IS/FULLRES/SX110IShMULTIW.HTM

Inferno

I compared yellowish haze of CRW with bluish haze of DNG. It's the same amout of haze. Maybe they are both related somehow.

Obihoernchen

chermucsnis
In the link below there is a multi target picture taken with SX110. Maybe it can help to improve the color matrix.

http://www.imaging-resource.com/PRODS/SX110IS/FULLRES/SX110IShMULTIW.HTM

Maybe we should do that:
https://chdk.setepontos.com/d/390
http://chdk.wikia.com/wiki/DNG4PS-2/Calibration

chermucsnis it is possible for you to take a photo with these settings?

axu89

Obihoernchen

chermucsnis
In the link below there is a multi target picture taken with SX110. Maybe it can help to improve the color matrix.

http://www.imaging-resource.com/PRODS/SX110IS/FULLRES/SX110IShMULTIW.HTM

Maybe we should do that:
https://chdk.setepontos.com/d/390
http://chdk.wikia.com/wiki/DNG4PS-2/Calibration

chermucsnis it is possible for you to take a photo with these settings?

Ive tried but I couldnt get good results :/ Yarvieh was working on the matrix bus hasnt posted in 2 weeks 🙁

chdkj

Yarvieh told me some days ago, that he followed both links and got no satisfying results. But I can't speak for him, of course 😀.

I don't have enough spare time these days and can not work on CHDK for sx110. Will be back at end of month (but I will check the forum from time to time).

@obihoernchen: sx110-wiki-page looks good!!!

Just an idea: What's about the other 12-bit cameras? Do they possess a proper color profile? How do they got it?

Regards!

chermucsnis

Obihoernchen

chermucsnis
In the link below there is a multi target picture taken with SX110. Maybe it can help to improve the color matrix.

http://www.imaging-resource.com/PRODS/SX110IS/FULLRES/SX110IShMULTIW.HTM

Maybe we should do that:
https://chdk.setepontos.com/d/390
http://chdk.wikia.com/wiki/DNG4PS-2/Calibration

chermucsnis it is possible for you to take a photo with these settings?

I'm afraid not, I have no ColorCheck target to take a photo of. I just saw this picture in a website reviewing the SX110, and thouth it could help, but now I see that the color calibration requires also the RAW file as well, not only the JPEG, and that the camera must be with specific settings.

chermucsnis

Reading closely the post with the link to the DNG4PS adapted for SX110, the author tells that this preliminary build "tosses 2 bit of information" (because the original DNG4PS works only with 10 bits, I suppose).

What would be the impact of losing these 2 bits? Could it be related to these color issues?

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