Lunch atop a (Springfield) skyscraper

Lunch atop a (Springfield) skyscraper
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The long answer has already been covered pretty well, which is that compressed file formats don't actually record every pixel. They do something along the lines of recording a particular color of a particular pixel and then recording "this color is used again at x, y, and z locations." This is (theoretically) fine if you've captured your image exactly as you ...


This is absolutely normal. While the sensor always samples the same amount of data, the file does not need the same number of bytes to represent different images. The more details there are, the more bytes it takes to represent its contents. This is particularly true of lossless formats like most RAW, DNG and TIFF. They use algorithms to represent the ...


If you have several dozen random JPG images from one camera (many scenes, but all of same image size) in a folder, and then sort them by file size ("details" view), it is hard to say what your pictures might be, but their JPG file size will vary (largest vs. smallest) probably at least 2 to 1, and extremes can be much more, possibly 8 to 1 (just for some ...


This is not only possible, but extremely likely, when you're using a compressed image format such as JPEG. Data compression methods in general become more efficient as the data to be compressed decreases in entropy (try creating zip files of a large page of actual text vs. the same sized page of a single repeated character). The more features or fine ...

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