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IXUS 105 / SD1300 IS porting thread

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Offline iRonf0x

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #720 on: 11 / September / 2012, 06:26:58 »
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It's strange because it works well for me. What is your firmware version?
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Offline chispiao

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #721 on: 30 / September / 2012, 14:06:11 »
Hi everyone. I am trying to get CHDK for my SD1300 camera (firmware 1.00c) which is supposed to be here:

http://www.zshare.net/download/902798705d1d1c04/

But the link is not working anymore. Does anyone knows where can I get it?

Thank you,

Antonio.
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Offline belluzz

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #722 on: 30 / September / 2012, 14:10:46 »
Hi everyone, i have an ixus 107, with i think is the same thing as 105/SD1300 (firmware 1.00D) and i found that raw dng files come out cropped to 10mp. I have two examples taken at 28 and 112 mm, both on tripod and without IS. You can notice that in raws there isn't the right and bottom side.
Any idea about that?

Thank you for your great job!  ;)
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Offline belluzz

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #723 on: 30 / September / 2012, 14:12:04 »
Examples @112mm
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Offline reyalp

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #724 on: 30 / September / 2012, 17:20:16 »
Quote from: belluzz on 30 / September / 2012, 14:10:46
Hi everyone, i have an ixus 107, with i think is the same thing as 105/SD1300 (firmware 1.00D) and i found that raw dng files come out cropped to 10mp. I have two examples taken at 28 and 112 mm, both on tripod and without IS. You can notice that in raws there isn't the right and bottom side.
Any idea about that?
Thanks for the very clear examples.

It's not really possible for the actual raw to be narrower than the jpeg, if the raw width were wrong, the picture would be completely garbled.

However, it is possible that the active area and/or DNG default crop is wrong for this port, so this seems like the most likely explanation.

Looking at http://trac.assembla.com/chdk/browser/trunk/platform/ixus105_sd1300/platform_camera.h the active area seems suspiciously small compared to the raw dimensions. If you can upload a CHDK raw (not DNG) from the camera somewhere, someone can probably come up with better values.
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Offline belluzz

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #725 on: 01 / October / 2012, 19:20:34 »
Here is a raw file and the corresponding jpg
(please copy & paste if links doesn't work)

http://belluzz.altervista.org/forum/CRW_0469.CR2
http://belluzz.altervista.org/forum/IMG_0469.JPG
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Offline srsa_4c

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #726 on: 02 / October / 2012, 17:43:18 »
Quote from: belluzz on 30 / September / 2012, 14:10:46
Hi everyone, i have an ixus 107, with i think is the same thing as 105/SD1300 (firmware 1.00D) and i found that raw dng files come out cropped to 10mp.
If you look back in this porting thread (around March 2012), you'll find some discussion about this.
If you can run Win32 programs, here is a modified version of DNG4PS-2 that allows importing and exporting single camera definitions. I've attached an Ixus105 definition that can be imported with settings -> camera options -> import cam.
It's not proper, especially the color matrix values. You could play with the "active zone" values to see what part of the RAW is worth to keep. As I remember, it's a bit difficult to choose (there is some image data near the corners that is darker, but sort of usable). If you can come up with values that you find good enough, post them here (with example pictures if you want). DNG4PS-2 needs RAW files (CR2 in your case), not DNGs as input.

Why all this? As I don't own this camera, I don't want to be the one who chooses the "right" values.
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Offline waterwingz

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #727 on: 02 / October / 2012, 18:14:06 »
Quote from: srsa_4c on 02 / October / 2012, 17:43:18
Quote from: belluzz on 30 / September / 2012, 14:10:46
Hi everyone, i have an ixus 107, with i think is the same thing as 105/SD1300 (firmware 1.00D) and i found that raw dng files come out cropped to 10mp.
If you look back in this porting thread (around March 2012), you'll find some discussion about this.
If you can run Win32 programs, here is a modified version of DNG4PS-2 that allows importing and exporting single camera definitions. I've attached an Ixus105 definition that can be imported with settings -> camera options -> import cam.
It's not proper, especially the color matrix values. You could play with the "active zone" values to see what part of the RAW is worth to keep. As I remember, it's a bit difficult to choose (there is some image data near the corners that is darker, but sort of usable). If you can come up with values that you find good enough, post them here (with example pictures if you want). DNG4PS-2 needs RAW files (CR2 in your case), not DNGs as input.

Why all this? As I don't own this camera, I don't want to be the one who chooses the "right" values.
I've usually found that the best way to do this is to set the mask boundaries to zero - all the way out to the sensor dimensions.   Then look at the resulting images zoomed out to the pixel level to see where the actual active sensor are is.  Don't worry about the corners - you will get lens vignetting there.  Look for the clear point where the sensor is masked and has no image date.

Also, you may need to play with the sensor CFA pattern depending on where you set the image boundries to adjust for the dreaded purple image.

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Ported :   A1200    SD940   G10    Powershot N    G16
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Offline belluzz

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #728 on: 02 / October / 2012, 19:21:32 »
I've just figured out how to compile chdk, after a try with this values   
   
    #define CAM_ACTIVE_AREA_X1 0
    #define CAM_ACTIVE_AREA_Y1 0
    #define CAM_ACTIVE_AREA_X2 4104
    #define CAM_ACTIVE_AREA_Y2 3048
   
i got this: http://belluzz.altervista.org/forum/CRW_0480.DNG
(taken with camera rotated 90° clockwise, sorry)
jpg: http://belluzz.altervista.org/forum/0480DNG.jpg

Assuming a desired size of 4000x3000 (like original jpgs) a starting point could be an offset of
16px from left side
24px from top
88px from right
24px from bottom

Edit:
I've tried DNG4PS-2, but something goes wrong
Error: Can't find camera profile for this file
« Last Edit: 02 / October / 2012, 19:35:40 by belluzz »
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Offline waterwingz

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Re: IXUS 105 / SD1300 IS porting thread
« Reply #729 on: 02 / October / 2012, 20:29:09 »
Quote from: belluzz on 02 / October / 2012, 19:21:32
Assuming a desired size of 4000x3000 (like original jpgs)
The jpeg may crop out valid image information at the edges.  Study the DNG file in full zoom mode at the center of the edges to determine where the actual limit of valid information is.

(sorry .. your download link was so slow ... 15 minutes to see the DNG file )
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