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Discussion Starter · #1 ·
First i gotta say the search engine is configured in a way that it REALLY SUCKS!!! You cant search for words less than three letters. Like DD or 4:3 , since it ignores the colon even if you put it in qoutes


Anyways, my question. Im curious exactly what percentage of the image is list on a full screen 16:9 image that is cropped to fit in a 4:3 ? Would it be 44 percent loss? Or 25%?


If you multiply 4:3 by 3/3 and 16:9 by 1/1 you get a ratio of 12 units to 9 units compared with 16 units to 9 units. So the 4:3 image for example would be 108 units total while the 16:9 image would be 144 units total. 25% of 144 is 108. Does that mean that you lose 1/4 of the image?


Im unable to think of a correct way to calulate this.
 

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Usually it is said that you get 33% more space with 16:9 over 4:3 which if phrased conversely means you lose 25% of 16:9 by cropping to 4:3. There are a few ways to do the math:


1.


16:9 = 1.78:1

4:3 = 1.33:1

1.78/1.33 = 1.33 or 33% more = 16:9 vs 4:3


2. (your method)

4:3 = 12:9

12/16 = .75 = 25% less = 4:3 vs 16:9


also as: 12x9 = 108 units area

16x9 = 144 units area

108/144 = .75


notice they are inverses: 1/1.33 = .75



To answer your question, yes you do lose a quarter of a 16x9 image when cropping to 4:3. You also gain 1/3 of the image when widening 4:3 to 16:9.


The opposite is true if you talk about cropping the image height, meaning that a 16:9 letterbox has 1/3 lines as 4:3 full screen on a 4:3 TV.


jake
 
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