Video information lends itself well to lossy compression techniques. The reason being, there is a significant amount of data the human eye does not perceive in the uncompressed version of the video or image. Image and video compression takes advantage of this fact. Specifically, the human visual system perceives brightness more readily than color More rods -Luminance sensitivity- than cones -Colour sensitivity- on our retinas! If you have ever compared LCD televisions, you may have noticed displays with higher contrast ratios look better.
The contrast ratio is the difference from the brightest white to the darkest black that can be displayed on the set. Since our visual system perceives differences in brightness more than color, the effect is a more appealing display, which is the same effect JPEG compression takes advantage of". What does that mean? In general terms the Gamma profiles that Nikon and Canon offers do a great work recording the information between an acceptable limit of what the video capabilities of DSLR cameras are able to offer, but For instance manufacturers like Lightillusion and Technicolor had presented Gamma profiles which squeeze more information than regular Canon gamma profiles does, helping the users of this brand to obtain a better information throughout the material recorded from their Dslrs.
Personally, I was very unsatisfied with the possibilities that the Nikon gamma profiles had to offer, so I embarked myself on the task to make an investigation, and several rigorous tests about the possibilities of crafting new Logarithmic Gamma profiles which could fit my needs when capturing video in a variety of different situations with a Nikon Dslr. I finally came to a pleasing accomplishment in my task: the VH Log Gamma Profiles, which allowed me to get profit with the poor video Dslr characteristics that I mentioned before without constraining or compromising the information in order to do a proper post-processing of the clips obtaining the following over the Nikon Gamma profiles:.
From left to right: 1. Film G. Taro Z Gamma Profile. From Left to Right: 1. Showing up next I present comparisons from stills captured from material in video recorded with VH PseudoLog and its posibilities in post.
October 30 of It has been very difficult to craft a functional an S-Log Gamma profile for Nikon Dslr's and mainly for one reason:. The information captured both ways, stills and video, is represented in an 8-bit form in the screens of all DSLR cameras, the reason for this is:. As I mentioned before the video codec used to capture video on the Nikon Dslrs This applies for almost all Dslr and mirrorless cameras is an 8-bit based one, therefore the information is constrained to only 8 stops of dynamic range.
This makes the appearance of the material recorded to look somehow contrasty when reproduced on the camera's screen and on any platform. For instance, if the codec could be 10 or bit the recorded files will look more Cinematic Sony Cine Alta, Canon Cinema cameras, Red One, Arri Alexa use or color sampling at 10 or bit gamma space and pleasing given the wider representation of the gamma, which somehow emulates a more natural look, closer but still far away to what our eyes perceive as "natural".
There is no true display of the complete Dynamic Range of a raw file on the screen of ANY Dslr of mirrorless camera nowadays. So, when you use different gamma curves applied to a raw file stills the screen of the camera will show you a compressed version of the image representation of the Raw file, BASED on an 8-bit jpeg image.
What does it mean? This is not good. Especially with the close proximity of the vtx and fc on 4k version. Beyond the moisture issue Get a landing pad. Maybe bring a can of air with you so you can at least blow off a majority of the clippings etc before powering the quad back up. And this is the hardest solution Tip 2 Since most of the issues seem to be related to video image I will cover this next.
A lot of these are sent out with the VTX cranked to the maximum of mw. But if you just leave the quad sitting on the bench not flying there is a lot of heat building up since the vtx is on max power. The solution But then beginners will complain their video is not working properly. Not realizing when they arm it will return to "normal". So the tip here is to learn how this works. Set it to max and don't let it sit while powered on for extended periods of time, reduce the power setting, or enable pit mode.
Tip 3 Stop landing in dirt. Refer to tip 2 get a landing pad. There are many conductive minerals in "dirt". The motors have magnets which attracts these minerals into the motors. Not good This CineWhoop like drone features a pusher design with inverted motors. The manual included the following chapters:.
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