Twilight wrote:

Hi,

Is there a way to determine the percentage overlap of the images in a given panorama?

Thanks,

Jon

Hi Jon!

The overlap is set on your NPP-adapter. As a rule of thumb usually 20-25% is optimal, but sometimes 30% is appropiate - depends on several things. Using more than 30% can be ok - but also it can produce irritations when you render
the stitch.

best, Klaus

Last edited by klausesser (2012-09-22 12:42:05)

Twilight wrote:

Hi Klaus,

I guess I should have been clearer: is there a way in APP to check percentage overlap of two frames of a given panorama? I have several panoramas from back in 2000 when I first started shooting them (and so they are scans of film frames!). I don't have the data any longer as to what lens, head, percentage overlap, etc., I used. I could always do the math, but I thought there might be a fast way of calculating the %.

Thanks,

Jon

Ah - i see!

best, Klaus

Hi Martin,

That's very good! Although, I think after doing the division, you would have to multiply by 100 to get percentage.

I'd like to try an easy example: 24mm lens (Hfov: 74°, Vfov 24°) in portrait orientation. Two frames to make a square (can you tell I miss my Hasselblad? ). So, finished H and V fov will be 74°. For simplicity's sake, I'm going to say that the image also happens to be V36 x H24 pixels.

For this example, I could count pixels, and calculate a percentage from that: So, I count 8 pixels to characteristic points in this particular set of two images, therefore:

8px + 8px = 16px
8px/24px = .334
.334 x100 = 33% overlap.

Does that make sense?

I guess the place that has always messed me up is the overlap; if you are overlapping two 8px areas, I assumed the finished area would also be 8px. Since you are essentially laying one 8px area over another 8px area. But instead, you add the two.

I got a 4.0 out of a 4.0 in calculus, but I still need a piece of paper and a pencil to do any math!

The real reason I'm trying to figure this out is that I print my panoramics; but no calculator lents you define the output format (such as 3:1) and then tell how many frames at what %fov would be best. I need to understand that math. I think I'll make that another post tho'... 

Jon

foundation wrote:

The new 3.0beta gives you an overall overlap percentage.  Tho it sounds like maybe you are looking for two specific images within a panorama

Hi,

I guess I'll have to spring for the upgrade... 

I'm just using a pair of images in this case, although that could be extrapolated to a full panorama's worth of images.

Thanks!

Jon