panorama software,virtual tour software
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2003-01-11
#1

Mismatch Factor Roster and Reducing

 Hi Guys,

I have been getting between .1464 to .1948 mismatch factor stiching 2 fisheye images.

Is anyone getting a smaller mismatch factor? If so, help!

How are you accomplishing this?

Thanks.

P.S. Seaman your doing a good job replying to our posts...you too Dave.


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2003-01-12
#2

Hmm best I can get is .27xx or close to that value on 3 shots. 

However, I have found that when you take the same 3 shot series into a manual stitch I get a zero dot zero zero  [0.00] mismatch value.

Whilein the 'Help'  I have not yet found and explanation of RANGE for the 'mistmatch'.. I am assuming that the lower value the best.  So you .1464 to .1948 values are certainly better than my .27xx values.

Hope this helps


/s/
Dave
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2003-01-13
#3

hey dave,

I think think the mismatch factor is composed of color differentiation between the spheres as well as mismatch in the lines (my opinion).

and your right, when you manual stich them, the mismatch factor becomes .00 by default...which is misleading cuz you don't know exactly if you improved or not.


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2003-01-14
#4
Don't think the mismatch figure is critical for good stitching as I've got pairs of images with a mismatch figure of 0.04 that would need some help in Photoshop to perfect them. Others with much higher figures have stitched perfectly. Think it has more to do with the light balance between the hemispheres as the same shot taken with 2 different cameras give very similar figures but not necessarily the same quality of stitching........
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2003-01-15
#5

Thanks for the info Simon. I agree with you about the light balance.

I saw the tour of the Mancini kitchen and it looked great. Stitched very well!

How many shots are you taking and what are you using to stitch?

Thanks mate.


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2003-01-15
#6

Thanks, all the images on the website used 2 hemispheres. Those images are old ones stitched with Panotools a couple of years ago. I have an old CP950 and rotator that consistently give me better results than a CP995 with similar rotator despite similar mismatch figures.


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2003-01-15
#7

Dave,

I think my mismatch is less than yours b/c I used 2 shots instead of 3. So less overall color differentiation. I think.

Simon,

Thanks for the reply. I never used the ipix software for 2 images, but if you go to Realtor.com you will see that the photographers usually get acceptable results. Yes, you can see the seams pretty much in all the panos, but they stitch pretty well.

I have been trying to compare my results with what I see in Realtor.com.

What has been your experience with ipix stitching software? Good results? Blue seams? Mismatching lines? How do the tiles stitch?


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2003-01-16
#8

Get better results and more flexibility with Panoweaver but tiles are always difficult whatever you use.

 


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2003-01-16
#9

I hear you. Thanks for the reply.

Do you crop your images in photoshop before stitching?  if so,

what circular croping dimensions do you use?  I'm talking about the 1400 to 1500's numbers.


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2003-01-16
#10

Just for grins...on 2048 x 1536's we use 1424 x 1424 pixels and save the cropped image a a bmp.   Then we stitch in PW3 as full size 3000 x 1500 and save as bmp.  We make our final 1 time conversion from .bmp to jpg in Photoshop7.  This reduces the number of artifacts created by too many 'jpeg saves' . 

50% of 1424 is for x,y and radius center is 712 and easy to remember.  Have not tried on other camera res.

Dave


/s/
Dave
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2003-01-16
#11

dave,

i understand the more you crop the circle (the smaller the radius) will remove a lot of the blue halo. but in my experience, if you crop it too much then you loose part of the image and get more stitching errors.

are you able to crop it to 712 radius and not have problems?

i use 750 radius (1500 diameter). if i go down to 712 like you i begin to have problems because i cropped off too much of the image.