The application of certain tonal gradations or looks is something done in photo editing. This can fully alter the appearance of the image and make it more appealing. Often, such images find extensive usage in the publishing industry and on the web.
Applying filters is one way that will change the overall appearance of the image. Most of the photo retouching services use them while capturing the photo, rather than adding them during editing. However, the process adding filters in the editing phase is also very much adopted these days.
Filters are available in various types and serve the function of allowing or excluding a certain type of light into the camera sensor. This will change the color tones of the image or alter many of its key properties like hue, brightness, and reflectivity. The resultant image obtained will highlight certain properties, depending upon the type of filter used in the camera. Filters can fit into any type of lens and are available in a wide range of sizes.
In professional picture editing, the image taken with using a filter is then further enhanced by the application of various techniques. These techniques make the filter effects appear natural and help to remove any blemished caused during the capture of the image. Different types of filters produce entirely various types of changes to the image in its color or other parameters. Below are some of the most common types of filters used in photography.
Neutral Density Filter
Neutral Density filters are used to reduce the amount of light entering the camera. This filter is used during broad daylight to cut the exposure and make the image appear balanced. They are mainly used during long exposures, as the filter will cut down the light when the shutter is opened for extended periods and is therefore used to photograph flowing water or streams.
A polarizing filter can alter some of the key properties of an image by cutting down any reflections from surfaces like glass or water. Professional photographers and photo retouching services when taking photographs indoors use this filter. The final image will appear more smooth and free of any unwanted reflections that can obscure some of the key elements in the image.
UV filter is the most commonly used filter in cameras. This filter will prevent the ultraviolet light and the resulting haze from the images. Haze can affect the images with a slight tone and a UV filter will cut down this aspect. Besides its use in image capture, a UV filter serves the other important function of protecting the lens from scratches or impacts.
Graduated Neutral Density Filter
Graduated neutral density filters limit the amount of light entering the camera on a specific portion of the frame. This filter is mostly used during landscape photography to enhance the color of the skies and in giving more colors. A graduated neutral density filter will render the skies more clearly and cuts the exposure.