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India Point Park
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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 ...


I know this is an older post but I have a Samsung Note 3. I have an HDR app on the phone that takes 3 different pictures all at difference exposure settings. It then combines the three images and allows me to tweak the settings for the look I want. The process of taking 3 separate pictures is slow. This is a HARDWARE limitation. If anything in your ...


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 ...


The iPhone lenses are designed in-house. They are several element designs, approximately 5, and each element is a double-sided and radical aspherical element. source: Optics 241, Geometrical Optics - lecture notes.


A quick google search reveals no hard information but something like this: "The lens modules themselves bear no such identification, but Taiwanese manufacturers Largan Precision and Genius Electronic Optical have been named as suppliers for the iPhone 4, 4S and 5 -- with the iPhone 5 manifests also listing Japanese optical manufacturer Kantatsu." - ...


The sensor is made of of photosites. Each one is a finite physical element which cannot change size. When a camera or phone takes a photo, each photosite is normally turned into a pixel. Other than on Foveon sensors (and a few others no longer in production), the camera uses information of adjacent photosites to interpolate full color information. So, while ...


Simply resizing the photo should be practically instant. If the Zenfone spends seconds to process the image it's probable that it's doing something more intensive such as advanced noise reduction - possibly "dark frame subtraction" where it takes another exposure with the shutter closed and subtracts that image (which only contains noise) from the original.

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