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sx40HS focus to infinity not doing it.

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Re: sx40HS focus to infinity not doing it.
« Reply #60 on: 24 / April / 2012, 23:20:06 »
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The CHDK image is much better on the left 2/3rds of the image; but the stock image is better on the right 1/3rd.
Look at the rock at the bottom right on each image or the treetops on the right - the stock image appears focused and the CHDK one does not.
This doesn't seem to be the case for the ones I posted crops of earlier
http://www.mediafire.com/?s0fywnatz10pdf8 = WITHCHDK.JPG
http://www.mediafire.com/?pna1obs6ifou3sn = NOCHDK.JPG

The crops are both pretty close to the center of the image, and the pattern of the WITHCHDK one being fuzzier is pretty much across the image.

I find the scene in the most recent ones a lot harder to interpret. I do agree that there is some variation between them and in some areas the CHDK (without captseq) one  looks better.

As I mentioned before, taking several images with and without would help us understand how much things vary shot to shot independent of whether CHDK is running or not.

Using a consistent scene with some nice high contrast details would also make things easier.
Don't forget what the H stands for.

Re: sx40HS focus to infinity not doing it.
« Reply #61 on: 25 / April / 2012, 00:37:13 »
i will be able to test more tomarrow i hope............................................
 the weather here has been bad but it shuld be clearing...
Then i will have more and Beter images to post.
« Last Edit: 25 / April / 2012, 00:39:07 by radioman193 »

Re: sx40HS focus to infinity not doing it.
« Reply #62 on: 25 / April / 2012, 00:47:26 »
see its hard to do focus tests in this ..


 ???



Re: sx40HS focus to infinity not doing it.
« Reply #63 on: 25 / April / 2012, 10:45:31 »
Ok final testing complete and all the images look the Same now..
AND there is Plenty of manual Focus now..

So if we could keep it working like this it would be good.
as long as the Other functions were to work to.

>>>>>>>>>>  I did notice the chdk files look Darker Why ?  <<<<<<<<<<<<<<<
 

http://www.mediafire.com/download.php?35pq66ui6qog6n6

http://www.mediafire.com/download.php?88s3f7gqxe7ijf8

http://www.mediafire.com/download.php?ynuyhk177nijy6x

http://www.mediafire.com/download.php?gktmiomkno2e6r4

http://www.mediafire.com/download.php?63fsfzn0d8ubh3p

http://www.mediafire.com/download.php?6x6hinh6uesiyi1

chdk1


stock1


chdk2


stock2


chdk4


stock4



« Last Edit: 25 / April / 2012, 10:59:35 by radioman193 »


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Re: sx40HS focus to infinity not doing it.
« Reply #64 on: 26 / April / 2012, 00:59:23 »
So if we could keep it working like this it would be good.
as long as the Other functions were to work to.
No, like I said, this isn't a fix, it's a lobotomized build. I cut off most of CHDKs brain, in hopes of finding out whether it was the bad part.

Quote
>>>>>>>>>>  I did notice the chdk files look Darker Why ?  <<<<<<<<<<<<<<<
It looks to me like the lighting changed between shots, which isn't surprising given the patchy clouds. Chdk1 looks darker than stock1 but chdk2 looks lighter than stock2. Looking at the grey car in the middle there's obviously been a pretty big change in light between the shots. In stock1, there's a whole lot of purpler around the edges of the snow, which isn't there in chdk1...

I don't see major differences in sharpness though. In stock4/chdk4 the hotdog sign and #19 both look good.

Both are much sharper than the earlier shots (which I made crops from). This isn't a surprise, the new ones are ISO160 vs ISO 800 for the earlier ones, but it is a reminder that the lack of sharpness in some shots isn't necessarily focus. For giggles, I've updated my comparison.

The amount of variation between shots does concern me. While I found the earlier comparison pretty convincing, it would be easy to be mislead...
Don't forget what the H stands for.

Re: sx40HS focus to infinity not doing it.
« Reply #65 on: 26 / April / 2012, 01:02:43 »
ok
well i deleted all the other files but out of the 127 photos the chdk ones were average darker than the stock images i just did not feel like uploading 254 images :)

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Re: sx40HS focus to infinity not doing it.
« Reply #66 on: 26 / April / 2012, 01:37:33 »
ok
well i deleted all the other files but out of the 127 photos the chdk ones were average darker than the stock images i just did not feel like uploading 254 images :)
In the build I made, the whole part of CHDK that does anything with overriding exposure stuff is completely disabled. Given the obvious variation in lighting in the ones you did post, I find that a far more likely explanation for variations in brightness.

As I've said before, we need to approach this scientifically if we are going to have any chance of figuring it out. I understand you can't control the weather, but as much as possible we need test images that are taken with identical settings of an identical seen that will clearly show the effect with a minimum of external variations.

If you are satisfied that my test build does not have the problem, then you can stop taking pictures with it and we can move on to trying something else.
Don't forget what the H stands for.

Re: sx40HS focus to infinity not doing it.
« Reply #67 on: 26 / April / 2012, 01:43:21 »
i can test this for a few more days if needed and if the weather lets me :)


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Re: sx40HS focus to infinity not doing it.
« Reply #68 on: 26 / April / 2012, 01:58:53 »
i can test this for a few more days if needed and if the weather lets me :)
If you want to test more, I think it might be helpful to take several shots in a row with/without CHDK. So for example, set up your camera take 3 shots of the scene without chdk, load chdk, take 3 shots with.

This will help us understand how much variation there is between shots that is not related whether CHDK is loaded or not.

I find the scene in chdk1/stock1 harder to interpret the others. When you have things like lettering on signs, straight lines etc, it's easy to pick a few well defined features and really compare them carefully.

Low ISO / fast shutter speed will also minimize the confusion. Obviously that requires full sun, so you are at the mercy of the weather, but a few very good test shots will be much bet than a boatload of messy ones.
Don't forget what the H stands for.

Re: sx40HS focus to infinity not doing it.
« Reply #69 on: 28 / April / 2012, 00:38:57 »
Just a "Sample"




 

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