Image Metrics -- finger-printing images for comparision Web Cameras -- Finding what has changed in fixed cameras The ability to compare two or more images, or finding duplicate images in a large collection, is a very tricky matter. In these examples we look at comparing images to determine how they similar they are, and where they differ.
Those ROUND "Cambridge Glass" labels Most Cambridge collectors are familiar with a label similar to the one on the left there were actually several variations, over the course of the company's existance.
But the two labels on the right have been a bit of a mystery to many collectors of Cambridge glass. To an experienced Cambridge collector, these labels just aren't right, and the type of glass that the labels appear on is simply not at all like what we've grown to expect from the Cambridge Glass Company of Cambridge, Ohio, that produced glass from about through Well, the mystery has been solved.
The round labels are actually affixed to glass that was made in the Cambridge factory in Cambridge, Ohio, but only after the original Cambridge Glass Company went out of business. The National Cambridge Collectors web site has an article which explains how it came to pass that a New York company made glass in Cambridge, Ohio, and labeled it as "Cambridge Glass".
You'll be fascinated by the story. Comparison of Cambridge and L. Smith glass Turkeys The glass turkey containers made by Cambridge and L.
Smith Glass Companies shown in the thumbnail - click on it to see a larger photo tend to be confused with one another by even some of the most experienced glass collectors and dealers, yet the differences are quite easy to spot, once Comparing the real thing and the know what to look for.
Here are two easy ways to tell them apart. First, the size difference is obvious from the photo. But all you have to do is curl your fist into a ball and place it inside the body of the turkey.
With the Smith turkey, you can fit ONE fist inside the body. However, the Cambridge turkey will easily fit TWO fists from most people. The second test is visual.
Set the turkey on the table, with the lid on. On the Smith turkey, the base of the lid will be parallel to the top of the table i. On the Cambridge turkey, the lid is on a definite slant, and is NOT parallel to the table top.
Using the photo above and the two tests described above, you should now have no difficulty in distinguishing the Cambridge turkey from its smaller cousin made by L. Smith glass company and the Smith turkey was available for sale by L. Smith as recent as the fall ofat their web site: Comparison of Fostoria "June" and "Romance" These two patterns are very commonly confused.
Both have a ribbon with a bow, and both have flowers interspersed with the ribbon. You will notice from the closeups of the two patterns that there are significant differences that are easily seen when the patterns are placed side-by-side.
The above two pictures should give you a very good comparison between Fostoria's "June" and "Romance" patterns. The stemware used for the two patterns was quite different as illustrated below, and even the blanks used for plates, bowls, candlesticks, etc. There was a period when production of the two patterns overlapped.
The two patterns can be intermixed, but to the purist, there is a definite and distinct difference. Comparison of Fostoria "Navarre" and "Meadow Rose" Fostoria really went out of their way to confuse folks with these two patterns.
Not only are the etchings similar, but both patterns were produced on the same stemware blanks and many of the same flatware blanks as well. The above two pictures should give you a comparison between Fostoria's "Navarre" and "Meadow Rose" patterns.
Click on either one to see the two patterns side-by-side. The stemware blank used for the two patterns was identical, which is why the two patterns are often confused with each other.
The "Navarre" pattern was produced by Fostoria from tomaking it the most popular of all of Fostoria's etched patterns. The stemware was done in azure blue and a light pink that is distinctly different from the pink of the depression era.
The "Navarre" line also included some stemware shapes that were not made in "Meadow Rose", including a "Continental Champagne" flute shapea "Magnum" very large oversized bowla "Sherry" and a " Brandy " snifter.
Colored stemware in "Navarre" is usually "signed" on the bottom - but Fostoria sold the "Navarre" pattern to Lenox inand Lenox continued production of the stemware for four more years. The Lenox-produced stemware is often "signed" Lenox, and the pink color appears to be somewhat different from Fostoria's pink.
New Martinsville "Florentine" These two patterns are remarkably similar, despite the fact that they were done by two different companies. New Martinsville "Florentine" is a pattern that is not recognized by many people, while Cambridge "Diane" is more easily found and is usually identified correctly.
Click on the photograph of either platter and you will be presented with a larger image of the two platters side by side. There is a "horseshoe" shaped construct in both patterns that is the dominant feature, but on "Florentine" the "horseshoe legs" point towards the outside edge of the piece, while with "Diane", the "legs" point inward.
The remaining decorations appear to be grape vines and fruit on "Florentine", while on "Diane" they are flowers. To the left is a photograph of Cambridge's "Diane" pattern on the blank.This article is a significant update to a version written in It has been edited to include new articles, ads, some nostalgic games, reviews, and technology from When Choosing a Camera, How do You Find its Dynamic Range?
Dynamic range is one of the most important considerations for choosing a camera in the digital age. If you are not familiar with dynamic range, it is the range of tones that your camera can capture between pure white and pure black.
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