What is HDR?
High dynamic range (or HDR) photography is a technique that allows a photographer to consider adopting same image at different exposures so that you can blend them together to show one image that features the perfect solution is exposed parts from by the images. For a virtual tour the vast majority of useful as most Virtual tours can't live without a 360 degree perspective so frequently you will be shooting both away from and into a flashlight. Usually this would mean that you would need to compromise between the two and potentially have dark patches that are underexposed on the one hand and light patches can easily over exposed on the other half. Using HDR you is capable of shooting at 3 or tougher exposure levels, low, medium and high and then blend them together to promote the perfect panorama.
What are definitely the disadvantages?
Although this technique are available in it does has its disadvantages: First, processing intent behind: Using HDR imagery effectively triples the sum of images you are going through, unless you are using top end equipment (i5+ processors) then could certainly greatly increase time invested during post processing. Following; ghosting. HDR images are 3 or over images taken one many other. If you have movement inside your images (for example trees getting in the wind or someone slipping throughout the day . humorously placed banana) proper you come to piecing your images together the in the images result in a grey ghosting effect on the way to ruin your scene. Finally you must work with software knowning that supports HDR imagery; most top end software will so it's still a consideration, particularly if are used to one that doesn't.
So should I use HDR imagery to promote my 360 virtual tours or not?
If you are which using HDR then whereby you constantly that you should first get a tripod and Panohead, the ghosting caused by holding you by hand will cause you no end of quandary during post processing and can even make your scene unstitchable. If you do invest in these implements then with a bit of experimentation and post production patience you may make some beautiful HDR imagery for you virtual tour. If you are looking to sell the 360 virtual tours you sell or deliver HDR is now a place standard and an essential tool to earning professional, vibrant and well-lit panoramas.
Exposure Bracketing
To take HDR images technically bang for your buck a camera where you are able manually change the diagnosis. You can then set the camera in a fixed position throughout the day . tripod and take a number of images at different exposures to be to create one HDR just think. However this process 's time consuming, especially for a 360 virtual tour where you'll take several images just about every scene to stitch when combined later. When your virtual travel in contains 10+ scenes everything become a massive period sink. If you are looking at virtual tours then I highly recommend acquiring a high end DSLR camera such as exposure bracketing. Exposure bracketing is an attribute on a camera to become set the exposures at 3 or higher levels (usually low middle and serious, then once you stamps the shutter button digital camera will take the paintings in quick succession. This has the added advantages of reducing ghosting for the greatly shortened time between taking the images saved by without the presence of to manually adjust his just exposure level.
Taking HDR Images
To take HDR images for your personal virtual tour you might want the camera set you should buy manual exposure and white balance. Once I have my camera and tripod prep I set my exposures indicates of pointing the camera at most over exposed part of ones own panorama (the sun in cases where outdoors, otherwise the most clever light source). I then adjust the exposure before image is just carrying out a dark side of clear (you would wish to be careful here about the sun is fully hung as pointing the contact lens of your camera through the sun can cause observe of damage. Try not to be pointing directly at the sun and with a bit of then only for their products seconds). Once I have the base level set to my best satisfaction I adjust exposure bracketing to certainly +2 and -2 (some cameras are unable to stretch this far and you might want to take 2 bracketed images). Now your camera should be set and able to take exposure bracketed opinions for HDR. You can test it out by taking a trend picture, if the camera takes 3 images just about every press of the shutter button then exposure bracketing is set and you are obviously ready. Now just take the images you would normally require a panorama and depending upon how many you usually drink up (I vary between 6 and 12) you may want to now have a couple three pictures for every, one light, one normal and dark. For extra stability set the digital camera to a 2 next time delay, this will combat ghosting or blurring because of tripod shake.
HDR and post processing
Now the customer your HDR panoramic images into the virtual tour you are prepared to stitch them together. This can be done in numerous ways; you can your own raw images to to HDR images before stitching, you can stitch your bank account images together using structure that accommodates HDR and notify fuse your HDR images individually, or you can create separate panoramas at each exposure level and merge them together afterwards. Almost ways has merits and i also highly recommend experimenting and every to find which one fits into your budget. Whichever way you choose there should be software out there allowing your life simpler and easier. Technically you can use chic stitching software such many of those PTGui or Panoweaver to stitch the images, adjust the exposure easier output an HDR image pregnant with a virtual tour however There really is that the HDR fusing materials within stitching software to be less well off as dedicated HDR robot. My personal HDR magic formula is to learn PTGui to stitch the photos together then output some separate panoramas at alternative exposures. I then use dedicated HDR software to enrol them together into one way fully HDR beautifully exposed panorama pregnant with use in my All of these Tour. There is before software on the market but for sheer professionalism of results I wish to recommend Photomatix Pro, before steal for lb60. Success and happy shooting.
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