Skydome HDRI - Brooding Clouds

High-dynamic range imaging (HDRI) is a method of digital photography, where the limited dynamic range of a digital camera sensor is overcome by combining multiple exposures of a one shot. Compared to the human eye, digital sensors have inferior dynamic range, which means that shot with large contrasts bear those almost iconic burnt-out whites or drowned blacks. If a sky is tried to capture within the sensors dynamic range, sky being brighter than other parts of a usual outdoors scene, the other pats of the shot are underexposed or even cut to black. If then the shadow detail is desired to capture into the image, then the sky is blown out. The usual resolution of camera's automatic calibration is a solution, where something is given off from both of the extreme ends of dynamic range. A bit of the sky is blown out and bit of the shadows are cut to black. This is called Low-Dynamic Range imaging or LDR for short. Usually in HDR-photo there are three exposures: one where shadow detail is visible, one with the "standard" settings, or the best estimate of cameras automatic calibration, and one for highlight detail is visible. When these three exposures are combined into one image, the resulting photo is a 32-bit floating point image. Normally image is 8-bits. The bits refer to the color depth, as to what range of colors the format can reproduce. The 8-bit image is limited to hundreds of thousands, and 32-bit counts in the trillions, in almost infinite number of colors. Also, when in 8-bit or 16-bit depth images, every pixel has a certain value assigned to it, in the floating point (where the name comes from) every pixel can have a possible value from a range of values, making it superior format in color and exposure precision. Though it is very limited where full 32-bit images can be shown, so a process of tone-mapping is applied into the image, when it's converted from floating-point format to either 16-bit or 8-bit. The tone-mapping process means basically that the one LDR-image (8-bit or 16-bit) tries to reproduce all exposure levels in one image more of what human eye sees.

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