HDR (high dynamic range) –  is a set of techniques that allows a greater dynamic range between the lightest and darkest areas of an image than current standard digital imaging techniques or photographic methods. This wide dynamic range allows HDR images to represent more accurately the range of intensity levels found in real scenes, ranging from direct sunlight to faint starlight, and is often captured by way of a plurality of differently exposed pictures of the same subject matter.The two main sources of HDR imagery are computer renderings and merging of multiple low-dynamic-range (LDR) or standard-dynamic-range (SDR) photographs.

Above explanations were taken from Wikipedia. I was using the 2nd method (merging of multiple standard-dynamic-range photographs). The main thing was to make a few shoots of the same scene with different exposition (from low to high) and then merge them together. I used Photoshop for this purpose but there are a few more different cool tools that can be used.

You can find my first work result below.