What must be HDR?
High dynamic range (or HDR) photography is a method that allows a photographer to be same image at different exposures and next blend them together to file one image that features one of the recommended exposed parts from the many images. For a virtual tour this is particularly useful as most Virtual tours will be expecting a 360 degree perspective so sometimes you will be shooting both out and about and into a light source. Usually this would mean that you would have to compromise between the two and have the potential dark patches that are underexposed somewhere and light patches in which are over exposed on the other. Using HDR you can shoot at 3 or more exposure levels, low, medium and serious and then blend them together to produce the perfect panorama.
What would be the disadvantages?
Although this technique is excellent it does has like disadvantages: First, processing get: Using HDR imagery effectively triples the quantity of images you are dealing with, unless you are using high end equipment (i5+ processors) then this may greatly increase time spent my youth during post processing. The second thing; ghosting. HDR images are 3 as well as images taken one once the other. If you have movement in your images (for example trees entering into the wind or someone slipping through a humorously placed banana) if you come to piecing your images together the differences in the images you could end up a grey ghosting effect idea . ruin your scene. Finally you'll have to work with software that supports HDR imagery; most top end software will but it's still a consideration, especially if you are used to one that doesn't.
So should I use HDR imagery to produce my 360 virtual tours not really?
If you are thanks to using HDR then a strategy to adhere that you should first pick up a tripod and Panohead, the ghosting caused by holding your camera by hand will make you no end of ailment during post processing and could make your scene unstitchable. If you do invest in these pieces of equipment then with a few experimentation and post production patience a person may make some beautiful HDR imagery merely virtual tour. If you are planning to sell the 360 virtual tours you produce HDR is now a small-business standard and an essential tool to earning professional, vibrant and vivid panoramas.
Exposure Bracketing
To take HDR images technically you just need a camera where along with manually change the try. You can then set digital camera in a fixed position through a tripod and take there are many images at different exposures to be played with to create one HDR plus. However this process 's time consuming, especially for a 360 virtual tour where you would like to take several images for most scene to stitch and additional later. When your virtual journey contains 10+ scenes additionally become a massive order of business sink. If you are considering virtual tours then I highly recommend investing in a high end DSLR camera contains exposure bracketing. Exposure bracketing is an element on a camera so that you can set the exposures at 3 or more levels (usually low middle and serious, then once you just click the shutter button digital camera will take the graphics in quick succession. This has the perks of reducing ghosting thanks to the greatly shortened time between taking the images saved by in all likelihood to manually adjust significantly exposure level.
Taking HDR Images
To take HDR images plus a virtual tour you should have the camera set to arrive at manual exposure and caucasian balance. Once I have individual camera and tripod set up I set my exposures by causing pointing the camera no more than over exposed part worth mentioning panorama (the sun whenever outdoors, otherwise the best light source). I then adjust the exposure prior to the image is just with a dark side of clear (you would want to be careful here if the sun is fully bare as pointing the the len's of your camera onto the sun can cause warning damage. Try not to have it pointing directly at the sun and if you do then only for a lot seconds). Once I have the bottom level set to generally satisfaction I adjust exposure bracketing to at least +2 and -2 (some cameras cannot really stretch this far and you do have to take 2 bracketed images). Now your camera should be set and ready to take exposure bracketed images for HDR. You can try it by taking a tryout picture, if the camera takes 3 images for most press of the shade button then exposure bracketing is set and you're ready. Now just take the pictures you would normally require a panorama and for how many you usually work with (I vary between 6 and 12) at all cost now have some of three pictures for nearly every single, one light, one normal along with a dark. For extra stability set the digital camera to a 2 secondly time delay, this will combat ghosting or blurring that is why tripod shake.
HDR and post processing
Now underneath the your HDR panoramic images on the virtual tour you're ready to stitch them when paired with. This can be done in many different ways; you can period when you doubt raw images to published HDR images before joins, you can stitch regarding your images together using products that accommodates HDR and help it become fuse your HDR images on you, or you can create separate panoramas each and every exposure level and join them together afterwards. These kind of ways has merits and i highly recommend experimenting jointly to find which one fits into your budget. Whichever way you choose there's been software out there to make certain your life with more. Technically you can use fancy stitching software such nicely PTGui or Panoweaver to stitch the pictures, adjust the exposure but will output an HDR image used to a virtual tour however You'll find that the HDR fusing elements within stitching software to be less well off as dedicated HDR interface. My personal HDR magic formula is with PTGui to stitch the photographs together then output loads of separate panoramas at the many exposures. I then use dedicated HDR software to combine them together into one fully HDR beautifully exposed panorama used to use in my These types of Tour. There is most of software on the market with regard to sheer professionalism of results I need to recommend Photomatix Pro, the current steal for lb60. Sincerely and happy shooting.
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