Image processor is one of the most important components of a digital camera. In addition to the lens and the image sensor, Image Processor plays an essential role in the production of the digital image. Its the quality of Image Processor which is decisive for the quality of the recording. The terminologies Image Processor and Image Processing Engine are often used synonymously but they are … [Read more...]
Digital Photography
Digital Photography covers all the techniques like Digital Camera like DSLR, Digital Rangefinder to obtain a picture through the use of an electronic sensor as well as processing techniques.
Aliasing in Photography
Aliasing is known error in the field of signal analysis caused by insufficient sampling rate. In image processing aliasing of images take place too. This article, Aliasing in Photography has more closer relationship with Physics than Photography itself, however, we have tried to keep this article on Aliasing in Photography as simple and understandable by anyone. What is Aliasing and its … [Read more...]
Noise in Digital Photography
Noise in Digital Photography is defined as the deterioration of a digital image captured as disturbances which are not related to the actual image content. Noise sometimes compared with film grain in film photography, however, film grain in film photography is used for artistic effect, where as Noise in Digital Photography is a pathetic deterioration of image quality. What is Noise in … [Read more...]
Diaphragm of Digital Camera : Brief Details
Diaphragm is a mechanical device attached to the cameras with which the light transmission through the optical system can be changed. Diaphragm acts like iris. As Diaphragm obviously has the direct control of Exposure, exposure control can be executed through controlling this Diaphragm unit. How Diaphragm of a Camera works Diaphragm practically works in the same way in older film … [Read more...]
Live Preview in Digital Camera
Live Preview in Digital Camera is a system that makes possible to use an inbuilt digital display like an optical viewfinder in real time for capturing a photo. In case of Mobile Phones and Entry Level Digital Cameras, sometimes this Live Preview Screen is the only way for real time time preview, i.e. there is no Optical Viewfinder but only a Live Preview screen. How this Live Preview in … [Read more...]
Exposure in Photography
Exposure is a known method in the photography to collect the different light distribution of a target object on a photographic film or sensor to reproduce an image. Exposure is influenced by the light sensitivity of the film or sensor, the aperture of the lens and the shutter speed of the camera. What is this Exposure is ? Exposure is measured in lux seconds and can is calculated … [Read more...]
Auto Focus in Digital Photography
Auto Focus (AF) is a technology which automatically brings the intended area into focus, there is passive autofocus and active autofocus. In this article, we will discuss about the basics how auto focus works and its usages. Types and Technology of Auto Focus Auto focus in this method is done by measuring the image contrast and is basically the same as eye. Since the camera in … [Read more...]
Shutter Speed in Photography
Shutter Speed in Photography is related to Exposure. The control of Shutter Speed on a camera is by a purely mechanically or electronically controlled knob. Unfortunately, at the time of writing this post on Shutter Speed, we have no article on Exposure itself, but you can read our article on Exposure, Digital single-lens reflex camera (DSLR) if you are not sure what we are talking … [Read more...]
Metering in Photography
Metering in Photography is the most common form of exposure measurement. It works on the principle of reflected light rays. If you are newbie about Photography, the articles on Digital Photography Basics and Digital single-lens reflex camera, these might be helpful for this topic on Metering. What is Metering in Photography The light intensity is on the entire surface under an … [Read more...]
Underwater Photography : Facts and Technologies
Underwater Photography is used for scientific purposes for example in the field of underwater archeology and also for journalistic, artistic or personal hobby. Most of us have seen Underwater Photography in good television channels like Discovery Chanel, National Geographic etc. Today we will go through the topic on Underwater Photography covering the technical aspects. General aspects of … [Read more...]
Focus in Photography
Focus is probably the most commonly used terminology in Photography which had a direct relationship with optics. Let us see how actually focus works. When we say the focus is done, the Focal point of the optical system of a camera is in the geometric place parallel to the optical axis of incident light rays of the intended object. Optics behind Focus The parallel rays of light is … [Read more...]