Understanding Photo Printing Paper or 4xD What is it?
What is a relationship?
All photos or movie has an attribute called an aspect ratio. The aspect ratio is the ratio between the horizontal and vertical dimensions of the photo. To calculate the aspect ratio simple divide the width or a photo by its height. For example TV in normal mode has an aspect ratio of 4:3 or in other words, if we divide the screen width to its height the result 4 / 3. TV in widescreen format onOn the other hand has an aspect ratio of 16:9.
If we take a picture with a camera light that travels through the lens hits a sensor (a film in traditional cameras or a CCD in digital ones). The sensor in turn translates the light into a two-dimensional image. Sensor itself) has physical properties such as width, height, granularity (in films) and the number of pixels (in digital CCD sensors.
The connection between appearance and photosPrint
Once the photos are printed on paper the look of the card must be the same as the aspect ratio sensor that was used to take the picture. If the aspect ratio is different, the result is a blank space paper or stretched image that fits the paper but distorts the objects in it.
Why did it happen? The answer is quite simple. For the sake of explanation can take a photo sensor that is 6 inches wide and 4 cm high (real sensors are much smaller). Suppose we try to be a picture with the sensor on a printing paper made to 4 cm in height. If the width of the paper should be less than 6 inches, we will have to reduce part of the picture, since the space is not enough paper. If the paper with a width of more than 6 inches, we leave a blank space on paper, since we are not "pretty picture" to print on more than 6 inches. If we want our> Photos exact page that can lengthen or reduce the picture horizontally, that is the size of paper – but then printed items in the distorted and appear thick or thin as they were in real life.
Printing on 4×6
One of the most common sizes of paper is 4X6. This dimension has to be taken for many years for printing photos with traditional cameras. The film had a traditional aspect ratio of 3:2 and then the photos taken with atraditional film camera would fit perfectly on a 4X6 card.
For reasons beyond the scope of this article, digital cameras, sensors with a different aspect ratio of traditional film cameras. The following table summarizes the popular image sizes in pixels and the corresponding aspect ratio (sensor pixels, width x height and aspect ratio):
2 MP – 1600 x 1200 – 4:3
3 MP – 2048 x 1536 – 4:3
4 MP – 2272 x 1704 – 4:3
5MP – 2592 X 1944 – 4:3
6 MP – 2816 x 2112 – 4:3
8 MP – 3200 x 2400 – 4:3
As can be seen digital sensors, regardless of the number of pixels that have a support ratio of 4:3.
So what happens when you try to insert a digital photo paper 4×6? The picture simply does not fit! is too wide or too high. For example, if we want the entire height of 4 inches will be to fill only 51 / 3 inch Print(4X51 / 3 is an aspect ratio of 4:3) and 2 / 3 inches will be left blank.
To resolve this problem and use the actual size of the card printing services of many, which allows the user to cut a part of the image. The premise is that instead would leave a blank space in the media, the user prefers to cut a portion of the image is not important, and use the card for everything else. Some services offer users a preference for cropping or photo or choose from an empty fieldpressure and this approach will be applied automatically to all his paintings.
What is 4xD paper?
Given the popularity of digital cameras and digital printing, printing services are the introduction of many forms of paper that are designed for digital prints. This means that the aspect ratio of the paper they offer is 4:3 and so perfect pictures with digital cameras, the paper added.
The new formats of digital documents have a consistent aspect ratio of 4:3 (the digitalAspect ratio of the sensor) and are as close as possible to their traditional film paper sizes. So – in fact, in the digital world is a 4X6 to a 4X5 paper size is 1 / 3 (a 4:3 aspect size of the paper, as near as possible) in a 4×6.
As a marketing gimmick and instead of writing exact paper sizes using the "digital", short for 4xD – the 4XDigital or in other words, means "as near as we could make the 4X6 aspect ratio digital cameracompliant.
As digital cameras are growing in popularity is expected that the cards are multi-dimensional digital camera that is compatible will be introduced. In a few years, most of the services of digital printing is the paper by default, and the film will be compatible support the exception.