Iran Fax » Photography http://iranfax.org iranfax.org Wed, 27 Feb 2013 06:48:23 +0000 en-US hourly 1 http://wordpress.org/?v=3.4.2 HDR Photography http://iranfax.org/hdr-photography/ http://iranfax.org/hdr-photography/#comments Thu, 06 Dec 2012 04:07:58 +0000 admin http://iranfax.org/?p=11 Photographs and images are all about light – the amount of light and the intensity of the light. With too much light or too little light, you will end up with photos that are either too dark or too bright, or even washed out. Light is used to produce images expressed as luminance.  It is defined as the state or quality of reflecting light and the intensity of light emitted from a surface per unit area in a given direction. Dynamic ranges, therefore, are the spectrum from dark to light in scenes that you would want to photograph. Dynamic range is the measured ratio between high and low extremes in a set of values.

HDR Photography

 

HDR Photography is high involvement in the sense that you need to know how to use image-editing software to create an outstanding image. You will need to use the merged luminance in your photo and further enhance it. This means that you need to develop the eye for good and bad use of contrast and color.

If you want to put an HDR on a paper or on display, you must convert the wide-intensity range in the image to the lower range supported by the display. One old-mapping method is the manual dodge and burn technique familiar to photographers.  This technique is where you manually select different tonal ranges for different regions of image using a dodging or burning tool. Another solution is to use an automated tone mapping filter to reduce the dynamic range of an HDR image.

HDR Photography

Overall, HDR photography can be very exciting because of the prospect of creating a scene that will look very different because of the play of the light or the merging of luminance values in the scene. The best part is, even beginners with a point and shoot camera can do it effortlessly. So the next time you shoot a scene, try to get several exposures of the same shot and do your very own HDR impression.

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