Although GPS technology has been around for a long time it has only been in the last years with advanced technology that it became so pervasive. Most likely you have used GPS in a car or maybe even in a handheld device. GPS technology is so small and cheap today that it is now embedded in more and more devices and cameras are not an exception anymore.
But first some background about what GPS is and how it started. GPS stands for Global Positioning System. It started as a military system that the US army deployed in order to allow it to accurately read the position of each of its vehicles anywhere around the world. The GPS system was later on opened for civil use but for many years the US army limited the civil GPS accuracy to a few tens or hundreds of feet which significantly limited its usage. In the last years though the GPS system was opened up and today civil GPS receivers can pinpoint their location in very high accuracy of a few centimeters.
The GPS is a system of satellites that orbit earth at a known height and location. The GPS system is very simple in concept. A GPS receiver picks up the signal from a few satellites. The satellites encode some information such as their id and clock. The GPS receiver calculates the exact location of each satellite it is receiving signal from and then triangulates in order to get a perfect reading of its location.
As civil GPS accuracy improved and as its usage increased its price dropped significantly. With advanced microelectronic technology GPS receivers are ever smaller consume less battery and cheaper. In its early days GPS receivers were big and could only fit in cars and other bigger vehicles. Today it is possible to embed a GPS receiver in small electronic devices such as cellular phones wristwatches and digital cameras.
Embedding a GPS in a digital camera provides what is known as geo tagging. Long ago cameras offered timestamp tagging of photos. If the digital camera clock is set to accurate time then each photo taken includes a small print of the time it was taken on the bottom right corner. With digital cameras timestamp is no longer actually printed on the photo but instead it is included as part of the digital photo file meta data.
Geo tagging is very similar to timestamp tagging but instead of logging the time when the digital photo was taken with geo tagging the digital camera logs the exact geo location where the photo was taken. This information is stored as part of the digital photo file meta data. As most digital cameras support the EXIF format geo tagging is stored as a field in the EXIF record for each digital camera.
Geo tagging information is later on used by digital photo viewers. Photo viewers that support geo tagging can read the location information and then correlate it with a map to show where the digital photo was taken. No more are there photos that were taken long time ago and you cannot remember where they were taken and when. With geo tagging there is no more need to guess or to write down that information as it is stored perpetually alongside with the digital photo in an accurate format.
Negatives To Digital Photos
The advances and conveniences in digital photography make it possible for anyone to take a perfect picture, but how exactly is this possible is we all are not the world's greatest photographer? By touching up your raw images through digital editing you can take what was once an average picture and make it a great photograph. Maybe you needed to lighten your image, crop or rotate a bit and even clean up some dirty spots; this is all quick and simple to do once you know how. Most pictures need some type of adjusting to produce the final image. Take a look at this short guide to help you with the most common touch ups for your photos.
Step 1: Start Up Your Image Editor The first step, of course, is to fire up your favorite image editing program. For beginners, it's best to get a program like Ulead PhotoImpact. It's a great tool that allows you to achieve professional photo effects using simple, easy-to-follow steps.
Step 2: Remove Red-Eye If you're taking photos of people, chances are you may have taken a photo with red-eye problems. This is easily removed with image editing software. In Paint Shop Pro, select the Red-Eye Removal tool in the menu and voila, the program does all the work for you. In Ulead PhotoImpact, there's an equivalent tool called Remove Red Eye in the Tool Panel.
Step 3: Rotate and Crop If you want to change the angle of your photograph, you can do this with little loss in quality by using the rotate tool. You may also need to crop your photo to remove cluttered or unnecessary background area that might take focus away from the subject of the photo. Doing this will create a much more professional look.
Step 4: Play with Color Experiment with the different color tools for a different look. Through the versatility of digital editing programs you can make the sky green, the whole photo black and white, or give it an antiqued look with a sepia tone. A good photo editing program will have an automatic color balance option to adjust color flaws in your pictures.
Step 5: Blurring Effects Sometimes I like to add a blurring effect to my photos. What you can do here is to select areas of the photo which are unimportant and blur them out. This will bring more attention to the main subject of your photo. For example, if I had a picture of a flower and I wanted to play down the details in the leaves in background, I might add a blurring effect to the background.
Step 6: Sharpen Up The next step in touching up a photo would be to sharpen as needed. While you cannot truly sharpen an out of focus image you can improve on it by selectively sharpening focal points. Sharpen a person's eyes for example and leave the rest of the image unsharpened.
Step 7: Resize You may need to resize your photo depending on your needs. Resize down to a smaller size to e-mail your pictures to family. Resize to a 4x6 print to turn your image into a greeting card.
Step 8: Save Your Work We're almost finished. Now all you have to do is save your work in the suitable image format. If you want to save all of the details for future editing, save in the TIFF format. If you want to send the picture by e-mail or upload to a web site, choose the JPEG format for saving the image.
Conclusion That's it! Now you know the basics for touching up and getting your raw digital photos ready for output. While you don't have to use every step listed above, it can give you a starting point to see which ones a certain picture might need. Have fun with your photos, experiment to see what enhancements you like best and practice, practice, practice!
Both Ronnie Hammond & David Peters are contributors for EditorialToday. The above articles have been edited for relevancy and timeliness. All write-ups, reviews, tips and guides published by EditorialToday.com and its partners or affiliates are for informational purposes only. They should not be used for any legal or any other type of advice. We do not endorse any author, contributor, writer or article posted by our team.
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