New answers tagged image-quality
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When not using chroma subsampling, JPEG generational losses are pretty much limited to rounding error as long as the same compression settings are used. (Majority of compression losses occur during the first compression.)
Here is what happens when an image is recompressed until convergence at q=90 without chroma subsampling (original, 1, n, difference):
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When photographing artwork there are two concerns - ensuring that the light is even and is positioned in a way to minimize hot spots and minimizing surface reflections that can distort colors and contrast.
The standard way of achieving the first goal is to use a copy stand, which consists of a baseboard to place the artwork on, a pole or column to attach ...
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Lead pencil drawings are problematic to photograph due to the properties of graphite. Graphite is a metal not a typical organic pigment, per se.
Pencil lead is a metal/clay combination. The clay holds the pencil "lead" shape. Various proportions of each determine whether the mark made is dark or light with the same amount of pressure upon the point.
When ...
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Superzoom cameras like the Canon model you mention are specialized to give medium quality at a very wide range of zoom settings. At 24mm equivalent (which is what most phone cameras are), they might actually be worse (smartphone lenses tend to be relatively sophisticated prime lenses, albeit tiny ones, optimized for exactly one focal length. They will beat a ...
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I have 5 different cameras and phone of course. Sometimes and very often I don't take camera with me, that's why I use phone to shoot. There is of course difference between shootings, especially you see it when you zoom or cut a face from the picture you got - it'll be of worse quality. I like this Nikon https://cameravs.com/Nikon-D3S best of my cameras, I ...
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It depends on the software you use for it, and especially the settings you have in them.
If you check in the save-as dialog under JPG, there are normally 'additional' or 'advanced' settings, and in there, you can set the quality target for the JPG. The default is often 80%, but you can set it to anything between 1% and 100%.
You should always set it to 100%,...
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Generally, when you do this with an image editor like Photoshop, yes, this is destructive. That's because the software doesn't keep a JPEG-encoded version of the image in memory to write back unchanged. It decodes it to its own internal working format, and then re-encodes to whatever output format you want when you save. (It may be smart enough to use ...
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This is very broad & ultimately you're going to have to make the call yourself…
Some points to consider.
JPG can't use 16-bit. It technically supports 12-bit but most apps don't, so that's probably out. Consider JPG to be 8-bit for practical purposes.
the Mac's preview is 'wrong' [for a given value of wrong]. CaptureNX-D knows exactly what the camera ...
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I will try to explain with the simplest math terms possible. If you want to skip the math, jump to part II, if you want to get the short answer skip to Part III
Part I
Frequency of a signal means the number of occurrences of a repeating event per unit of time. So if the unit of time is seconds then frequency is measured with Herz: 1Hz = 1/s. So a signal ...
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