PowerShot SX220 HS - Porting Thread - page 25 - General Discussion and Assistance - CHDK Forum
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PowerShot SX220 HS - Porting Thread

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Offline Blablaat

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Re: PowerShot SX220 HS - Porting Thread
« Reply #240 on: 10 / July / 2011, 15:48:38 »
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@ Tiz: I know, I was just playing with the camera and the options.

@ Funnel: Thx! I tried that program but I couldn't find the SX220 in the drop-down menu and did not know how to add it. Tomorrow I'll give it a try.

What do you mean by it's not too good? Is it better to use DNG's instead, although it takes longer for the camera to save them on the SD?
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Offline funnel

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Re: PowerShot SX220 HS - Porting Thread
« Reply #241 on: 10 / July / 2011, 15:58:21 »
Yes, for now it's better to use the inbuilt camera DNG. I tried to make/calculate the colormatrix in DNG4PS2 but I couldn't get good results. I followed this tutorial http://chdk.wikia.com/wiki/DNG4PS-2/Calibration
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Offline philmoz

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Re: PowerShot SX220 HS - Porting Thread
« Reply #242 on: 10 / July / 2011, 16:05:36 »
Quote from: funnel on 10 / July / 2011, 15:58:21
Yes, for now it's better to use the inbuilt camera DNG. I tried to make/calculate the colormatrix in DNG4PS2 but I couldn't get good results. I followed this tutorial http://chdk.wikia.com/wiki/DNG4PS-2/Calibration

I couldn't get DNG4PS2 to calibrate for the SX30 either.
Ended up using dcraw (http://www.cybercom.net/~dcoffin/dcraw/).
You need to compile your own version with the COLORCHECK option enabled, add the raw file size, make and model to the 'table' array and fill in values in the 'cut' array for the image you want to process.
It's tedious; but I was able to use it to get a reasonable set of values for the SX30.

Phil.
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CHDK ports:
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Offline Blablaat

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Re: PowerShot SX220 HS - Porting Thread
« Reply #243 on: 10 / July / 2011, 16:40:58 »
Lens profile for the Canon SX220 HS:

110710.lcp - 0.02MB

Used Adobe Lens Profile Creator 1.0 (as suggested by Funnel) to create the profile. Shot 45 photos (f8.0, 5mm/7.8mm/20.3mm/35mm). I think it's useless to go further than 35mm (7.0x zoom).
« Last Edit: 10 / July / 2011, 17:20:26 by Blablaat »
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Offline funnel

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Re: PowerShot SX220 HS - Porting Thread
« Reply #244 on: 10 / July / 2011, 17:27:59 »
Good work. I tried it and looks very good.
« Last Edit: 10 / July / 2011, 17:29:55 by funnel »
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Offline Tiz

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Re: PowerShot SX220 HS - Porting Thread
« Reply #245 on: 11 / July / 2011, 01:08:36 »
Thank you for the profile.

Does PTP ( http://chdk.wikia.com/wiki/PTP_Extension ) already work with the camera?

If I connect the camera via USB (without PTP), Windows does not see the .dng files. It's a bit burdensome to always swap partitions, remove the card from the camera and put it into the card reader.
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Offline funnel

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Re: PowerShot SX220 HS - Porting Thread
« Reply #246 on: 11 / July / 2011, 05:00:51 »
You can transfer the images with ptpcamgui.
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Offline Blablaat

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Re: PowerShot SX220 HS - Porting Thread
« Reply #247 on: 11 / July / 2011, 05:48:51 »
Quote from: funnel on 11 / July / 2011, 05:00:51
You can transfer the images with ptpcamgui.

I can't get it to work. Do I need to copy files from a CHDK DE build to your build?
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Offline whim

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Re: PowerShot SX220 HS - Porting Thread
« Reply #248 on: 11 / July / 2011, 06:19:46 »
@BlaBlaat

In case you haven't seen it yet, check the ptpcam gui thread for hints and tips.

Of course there's also the original thread on the German forum (in case you read german)

HTH,

wim
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Offline funnel

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Re: PowerShot SX220 HS - Porting Thread
« Reply #249 on: 11 / July / 2011, 06:21:05 »
I tested it right now and works for me. For PTP you need the alternative USB driver http://sourceforge.net/projects/libusb-win32/

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