Photographs keep our memories alive. Photography has undergone a revolution with digital technology. No longer is photography done with a camera and the prints developed in a dark room, which would take a few days to be developed. Now it is the digital age. Everything has to be done quickly. With the advent of digital photography this is indeed possible.

Earlier to take photographs, photographic films were used, images created and photographic processing was done to make the photos visible for all to see as pictures. In digital photography, digital technology is used to make digital images of people or any pictures that fancy us. This is then stored digitally in computers. No chemical processing needs to be done. The pictures can be stored, retrieved whenever we want, transmitted to any one we want to send it to, printed and also displayed.

The pictures can be taken with the help of a digital camera. The digital film is made up of flash memory modules or recordable CD’s. This can be transferred to the computer and stored there. In the computer, the photos can be made to look better with digital technology. The color of the picture, the background, the main image in the photo and the lighting can be made to look different and better. It can also be put on a website.

Digital technology gives the pictures a longer life as opposed to the camera print. We no longer need to have prints. We can see in on the computer whenever we want to. We can sent to near and dear ones far away.

Digital photography is a form of digital imaging. This can be done without a camera. It can be done with computer tomography scanners and radio telescopes without photographic equipments. Digital images can be made of conventional photographs, thus helping in restoring old photographs and helping in keeping memories alive.

Digital photography is the order of the day. Nowadays no one uses the conventional camera. Many new techniques have been made to improve the technology of digital photography. Every aspect of photography is advancing. New strides are being taken in all fields of lighting, optics, sensors, processing and display. There is also new software to integrate all this.

3D ImagesNormal images can be transformed into 3D images. This looks good when viewed from different angles. Making 3D images is very computer intensive. Models of famous places can be seen with the help of Microsoft Photosynth.

High Dynamic Range Cameras and displays are available. With a non-HDR camera a HDR a person can create his/her own HDR image combining multiple exposures. Dust Reduction Systems are also being put in digital SLR cameras to keep the dust of the image sensors of the camera.

A new technique is now used in museums. Using computer controlled lights and sensors; an object’s specular reflection is captured. This helps in taking pictures of oil paintings. This is not available in the market. Another feature is the removal of motion blur with the help of a flutter shutter. This is also not available in the market. Other areas that have improved are computer software, displays, enlarged gamut sensors and computer controlled lighting.

Various new techniques are being worked on and thought of by the companies that produce digital cameras and those who are into digital photography. Every now and then we hear of newer advances which improve the quality of photographs and help to restore the old ones that we possess.

Digital Photography and Printing

Using digital photography to produce passport and visa photos involves more than just photographing subjects with a digital camera. That is just the first step, the image capture step, of a multi-step process that also includes image display and image printing using computer and printer equipment. Each of these components — can influence either positively or negatively — the final printed photo that will be submitted for the passport or visa. The following recommendations for each of these digital components will ensure high-quality photos.

Digital Camera

Digital cameraDigital cameras are principally characterized by their image resolution or mega-pixel capacities; from low-resolution (less than 1 mega-pixel) to high-resolution (greater than 1 mega-pixel) to advanced high-resolution (4 mega-pixels or more). The camera''s resolution is the most critical feature in producing high-quality photographs. For U.S. passport and visa photographs, a digital camera with a resolution of 1 mega-pixel will be more than adequate for capturing the image and producing the final photo that conforms to the dimensions specified on this web site.

These cameras generally have automatic features for controlling many of the photographic qualities emphasized on the preceding web pages. Care should be taken not to rely totally on these controls since each subject — facial characteristics, clothing, facial movement, etc. — can vary and may not be accommodated for by the automatic settings.

Cameras with a direct electronic camera-to-computer interface are preferable to those requiring the use of an external memory card. Data transfers will occur much faster and allow for verification of a good image being stored in the computer. If a retake is required because the subject blinked or moved, it would be more convenient than taking several shots to be sure of a good one and then downloading them via the memory card.


The computer is the central component in digital photography. It stores and displays the digital images from the digital camera and enables those images to be printed on a variety of digital printers. Because of the huge amount of data contained in high-resolution digital images, the computer should have adequate memory and storage capacities. In addition to these two key elements, the computer should have high-speed interfaces to the camera and printer, as well as a fast CPU to control the image processing functions. The recommended computer configuration for processing digital images is provided below:

  • CPU Speed: 1.4 GHz

  • Main Memory: 128 MB RAM

  • Hard Drive Storage: 20 GB

  • Interfaces: High-speed interfaces to match your camera and printer, such as Firewire or USB 2.0

Display Monitor

Most display monitors today are capable of displaying images in various screen resolutions, all of which are suitable for viewing passport and visa images. These monitors also display images in a wide variety of colors. However, an image can look quite different when viewed on various display monitors, in terms of both screen resolution and image quality. For this reason, it is important to set the monitor''s settings to the manufacturer''s default values to view the image in the most appropriate manner. For more accurate color-matching, check that the calibration of your monitor is correct. If necessary, use the monitor''s control panel to fine-tune its color adjustments; for instance, to set the monitor''s color temperature to 6500 ºK to approximate daylight. For even greater color accuracy, the stored image can be converted to and displayed in a device-independent color space by using standard image display software. This removes the color bias of the specific display monitor and will more accurately represent the way the image should actually appear.


PrinterIf digital printers are used to produce passport and visa photographs in lieu of conventional photographic processes, the photographs produced must be high quality and photo-like in appearance. Certain types of digital printers such as — inkjet and dye sublimation — can be used to produce high-quality passport and visa photos. Inkjet printers deposit multi-colored ink onto photographic print paper. Dye sublimation printers use heat, applied to a multi-colored ribbon or film, to release a dye that is transferred onto photographic print paper. These two types of printers, when used with compatible print paper that produces high resolution, photo-like images, are suitable for printing passport and visa photos. They have multiple printer settings to control the format, print resolution, and print quality of the printed photo. In addition, they come with printer-specific device driver software that converts the stored image pixel data in the computer into the actual printer output to be printed onto the photographic paper. Just as with display monitors, printers have their own unique color profile that should be taken into account before the image is printed. The combination of proper printer settings and photo-quality paper determines whether high-quality photos can be obtained.

Avoiding Photo Printing Problems

Using digital photography to produce high-quality passport and visa photos is dependent on the condition and proper use of the digital camera, computer, display monitor, and digital printer. Maintaining the digital printer in good working order however, can be the single most important aspect of producing quality photos. Regardless of how much attention is paid to capturing, storing, and displaying an image, image quality will be poor if printers — including inks and ribbons — are not properly maintained. To ensure that a quality print is obtained, the image can be transferred to disk and taken to a photo lab to be printed. The equipment found in a photo lab will normally be capable of producing higher-quality photos and undergoes the frequent calibration and maintenance necessary for consistent results.

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