PowerShot SX220 HS - Porting Thread - page 26 - General Discussion and Assistance - CHDK Forum

PowerShot SX220 HS - Porting Thread

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Offline whim

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Re: PowerShot SX220 HS - Porting Thread
« Reply #250 on: 11 / July / 2011, 06:50:01 »
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I tested it right now and works for me. For PTP you need the alternative USB driver http://sourceforge.net/projects/libusb-win32/

Note that libusb is not compatible with Canon's CameraWindow, make sure that it's driver is not active or
libusb will not function properly.

wim

Re: PowerShot SX220 HS - Porting Thread
« Reply #251 on: 11 / July / 2011, 06:56:39 »
I tested it right now and works for me. For PTP you need the alternative USB driver http://sourceforge.net/projects/libusb-win32/

I installed it (had to copy the sys and dll myself) but maybe I'm forgetting something. I use ptpCamGui 2.0.100.

EDIT: Its working!
« Last Edit: 11 / July / 2011, 08:43:17 by Blablaat »

Re: PowerShot SX220 HS - Porting Thread
« Reply #252 on: 11 / July / 2011, 15:39:09 »
I shot over 200 photos to create a correct lens profile but the original JPEG still differs from the DNG's.

Is it possible that the camera itself doesn't correct it accurate? In other words, is it possible that the lens in my SX220 differs from the one they (Canon) used to create a profile?

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Offline Tiz

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Re: PowerShot SX220 HS - Porting Thread
« Reply #253 on: 11 / July / 2011, 16:44:23 »
In my opinion, the camera crops too much of the photo (and then bloats it back to 12 MP). Therefore, I am glad if your profile is a bit less aggressive.


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Offline Tiz

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Re: PowerShot SX220 HS - Porting Thread
« Reply #254 on: 11 / July / 2011, 17:15:59 »
ptpCamGui always crashes after downloading 7 photos. Moreover, it is pretty slow and does not show a real directory with the photos. Probably, it's more convenient to swap partitions and put the card in a card reader.

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Offline funnel

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Re: PowerShot SX220 HS - Porting Thread
« Reply #255 on: 11 / July / 2011, 17:17:37 »
Is it possible that the camera itself doesn't correct it accurate? In other words, is it possible that the lens in my SX220 differs from the one they (Canon) used to create a profile?

I guess it's possible. I saw some distorsion in the live view when shooting at the calibration charts.
I don't have the camera right now to test and compare against a jpg but your profile looks very good from what I see from my saved DNG chart images.



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Offline msl

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Re: PowerShot SX220 HS - Porting Thread
« Reply #256 on: 11 / July / 2011, 18:03:59 »
ptpCamGui always crashes after downloading 7 photos. Moreover, it is pretty slow and does not show a real directory with the photos. Probably, it's more convenient to swap partitions and put the card in a card reader.

This is not a problem of ptpCamGui. I have transfer over 700 pictures in one session.  The GUI works fine for me. Perhaps this is a memory problem of the SX220. EXMEM function could be help.

Or you try reyalps alternative PTP client. This client shows also real directories.

msl
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Re: PowerShot SX220 HS - Porting Thread
« Reply #257 on: 11 / July / 2011, 18:09:12 »
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).
thanks works fine!


Re: PowerShot SX220 HS - Porting Thread
« Reply #258 on: 12 / July / 2011, 18:23:24 »
Check this out:

Original JPEG (cropped)



Original RAW (cropped)



RAW, but this time I applied the lens distortion profile (cropped)




Shot this picture @ 5mm (1x zoom / no zoom). Today I created a new profile with another calibration chart and applied it on the second picture of this post. It's not complete yet, so I will post it later this week.
« Last Edit: 12 / July / 2011, 19:05:00 by Blablaat »

Re: PowerShot SX220 HS - Porting Thread
« Reply #259 on: 12 / July / 2011, 18:35:51 »
Does anybody need a profile for a specific focal lenght?
« Last Edit: 12 / July / 2011, 18:39:50 by Blablaat »

 

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