| |
| |
|
photosonlinespace.com
|
|
|
|
Why 1.5 Megapixels is Enough
Dots Per Inch is a useful measure of relative resolution. But if you don't know the image size in inches or some other measure of size, then the amount of dots per inch doesn't mean much. That's why DPI is used in conjunction with scanner Specifications, because you know that the size is going to be 3.8 by 1.7 inches! Different resolutions are used for different purposes. 72 or 75 DPI for screen viewing; 250 for digital photography and 300 dpi for printing. See how this is a nice comparison, yes, you can get away with 50 less pixels per inch in your photographs than would be required for A4 printing, this is because of the physical size of the photo! Dots Per Inch specifies how much information is resolved in a picture, whereas the number of megapixels is usually used to describe the total output size (in pixels) of an image. Example: I want to reproduce the standard photograph size. This would be 6 by 4 inches. Digital photography requires a minimum of only about 250dpi, So: 6 * 250 = 1500 and 4 * 250 = 1000, so you need an image sized about 1500 * 1000 pixels (about 1.5 megapixels). Thus you can get a perfectly good standard print from a 1.5 megapixel camera! If you take a photo twice, one at 5 and the other at 1.5 megapixels, than ask your self which one looks "better"? They will both look reasonable because your computer generates colours such that the image looks better than it really is; if you were to print both as a 6 by 4 image, they will look identical, because your printer can't generate more than 300 dpi so the "better" image is effectively reduced in quality anyway. This example demonstrates how it is possible to literally waste memory, ie for everyday use the additional memory required for the other 4 megapixcels gives you no real benefit! This is quite good because a 36 Megabyte media card can store 50 to 65 images at 1.3 megapixcels but only 8 to 10 at 5 megapixcels, so unless you are planning on getting your images printed larger than 6 by 4 there's no real advantage to the full 5 megapixcels. Now we have established that a 1.5 megapixel camera will produce a 6 by 4 inch standard photograph, that is, it will generate a resolution such that each pixel is simply reproduced "as is", we come to the more interesting issue of enlargement. If you wanted to print your 6 by 4 inch image as a 10 by 8 photo (which would normally need the full 5 megapixels), there would not be a sufficient number of pixels for the additional surface area, so we now need to scale up the existing pixels by "resampling" the existing pixels, a process which estimates how the "missing" pixels should appear, and fills them with the appropriate "colour". A 25% resample I am the website administrator of the Wandle industrial museum (http://www.wandle.org). Established in 1983 by local people to ensure that the history of the valley was no longer neglected but enhanced awareness its heritage for the use and benefits of the community.
MORE RESOURCES:
Google News |
|
|
|
RELATED ARTICLES
The Advantages of Underwater Camera Housing You will need an underwater camera housing to keep your valuable camera dry. This is a very important piece of equipment. Digital Camera Metering Looking at the most intricate details of the digital camera as a technologically advanced device a lot of functions come into play. Such s a point is that of the digital camera metering. Landscape Photography - Capture the Beauty That is All Around There are many different types of photography. You can take pictures of anything and there is someone out there somewhere who would like to see the pictures that you take. Safari Wildlife Photography Top Four Tips I've been practising wildlife photography on safari for over twenty years now in places like the Kruger National Park, Chobe, Okavango Delta, and Hwange game reserves and these four tips have been indispensable in making sure that I get some decent wildlife photographs.1. Getting Rid of Red Eye The photos you took of the party are really great - except for one thing: "red eye" makes everyone look like extras from a low budget horror movie! Red eye can be a real problem if you're taking photos with a flash. It's caused by the reaction of light from the flash on the inner workings of your eye. Start a Photography Business from Home Anyone with the right camera equipment, and the necessary skills can set up a home business, marketing photography. You need only to convert a room of your house into an office, and then you can work immediately. The Alligator Farm - Home to Beautiful Winged Creatures Your first thought when you read "Alligator Farm" might be "tourist trap," but that could not be more inaccurate. And while the alligators are wonderful and plentiful at the place fondly referred to as the "Gator Farm," it is the birds that attract the world's best photographers. The Well-Dressed Photographer - Summer Outdoor photographers shoot year round. That includes the hot summer. Photography Contest - a fun and rewarding experience Do you like to take photos? Are you always standing by with your camera waiting for that moment that is meant to be captured on camera? You may even be taking photography classes or maybe you have already completed a photography course and you want to share your photos with others. You may want to get into photography as a career and winning a photography contest will help you get recognized. Taking Panoramic Landscapes - The Easy Solution I love panoramas. There's something very appealing about their shape. Photography - Rules of Composition Composition is defined as the combining of distinct parts or elements to form a whole. In photography that definition is very important in taking quality pictures. The Best Wildlife Camera To Take On Safari Good wildlife camera equipment on safari can make the difference between pictures you will be proud to show your friends and family when you get back and ones where it's difficult to figure out exactly what you were photographing because it's only a fuzzy black dot surrounded by green vegetation.I take wildlife photographs for a living and I have had to quickly figure out what the best cameras and lenses are to get the job done effectively. Digital Camera Bags - Purchasing and Using Some compact cameras are small enough to fit in your handbag or pocket, but I still recommend purchasing a camera case. It will save your camera from unnecessary wear and tear. Photo Equipment Lists You arrive at your photo shoot excited about the images you are about to take - that is, until you realize that you have left an important piece of equipment at home. You now will have to improvise, spend extra money or time to replace the item, or go without it for the shot. Wedding Photography: How to Become a Successful Wedding Photographer Once in while I receive e-mails or phone calls from aspiring or beginner wedding photographers asking me for advise on how to become successful in the wedding field. My first question is always what their motivation is to become a wedding photographer. Crooked Horizons in Your Photos? - Here is a Five Minute Digital Fix Remember the good old photography days?Film camera in hand, you would see that perfect landscape, seascape or sunset and shoot off several shots.Perhaps a couple of weeks later, once you had returned home and finally finished that 24 or 36 exposure film, it was off to the photo-lab to get the film processed. How to take Great Photos of Your Pet We all love our animals. They do such funny, adorable, and cute things. Digicam File Formats Looking at the digital camera, a person can visualize it as a combination of a camera along with a miniature computer system that stores the images as files or sets of bits, rather than a chemically treated film. Thus it comes to be a fact that there are certain file formats in which these images of the photographs captured by the camera are stored. Photography Business: Taking Baby Photos - for Professionals & Families Babies make the best and the worst subjects to photograph. They are the best for two reasons, people are more tolerant at looking at baby photos, as well as the fact that babies are not aware their image is being captured, and therefore they do not tend to put on the "camera face" so typically used by elder children and adults. Nude Art Photography Nude photography is the genre of art photography, whose subject is the representation of the naked (full nude) or partially naked (half nude) human body.The aesthetic value of nude photography and its boundary to erotic photography can only be determined with difficulty and inter-subjectively and is also affected by its numerous overlaps with pornography.
|
|
Powered By: Free Work At Home Business Opportunity! |
| © 2006 |
