This problem is mainly aimed at the problems caused by the PS software thumbnail, and how to keep the particle feeling of the film while shrinking. We should all have encountered similar problems-
-The original quality is very high, 100% of the time the details are vivid, but want to put online communication, shrinking later found that the quality of the picture mediocre, no spirit. This is because the image shrinks the algorithm
Caused by the decline in the micro-contrast. So the picture has to be sharpened to solve the problem. Sharpening is essentially an HDR, an enhancement of contrast, so excessive sharpening can cause
The decline of saturation, contour groove and other phenomena. Natural sharpening, should be to avoid the sharp contour, but only sharpening the details, so that looks more pleasing.
I usually use PS inside the "two cubic cube (for smooth gradient)" This algorithm first to compress the picture size, and then with "smart sharpening", after several experiments found that if the picture
Size of around 800, then the intelligent sharpening radius of 0.3 is a relatively perfect selection point, and then sharpen the number of general in the vicinity of 30~50 wandering. When the number is about 30, it may feel
No change, but the picture is really more clear, apply to the body portrait and tree branches/dense leaves, and around 40 suitable for the bust portrait and cloth textile, etc., 50 suitable for the humanities
, King and other. Of course, these are not necessarily, according to the picture itself to set.
Why not use PS inside ready-made "two cubic more sharp"? That sharpening is too serious, unnatural. Sharpen the operation must be cautious, the transition will ditch edge, resulting in the loss of three-dimensional
And the lack of hierarchy. Better not have it!
The following figure is an example of a thumbnail comparison. K20d+ Foran up to 135f4dklps directly after the smooth narrowing:
After intelligent sharpening, the radius of 0.3, the number of 50 after:
When is it absolutely impossible to sharpen? You can't sharpen the lens while it is running. A slight run of Coke, for example, the final eye without the hair behind the clear, then can not sharpen, otherwise will only be distracting.
If you don't sharpen, you come naturally. Do you need to sharpen a first when raw out? I only use Silkypix, you can use the software default sharpening radius and quantity, because raw sharpening is
Based on the original data, but also the big picture sharpening, so it does add some so-called details, better than nothing. But whether or not the big picture is sharpening, will not affect the small map when sharpening the choice,
In other words, the small map should be sharpened when it is sharpening.
Do film thumbnails need sharpening? This is not necessarily. I think the digital photo, the humanities, the scene is sure to sharpen, but the extent of the problem, and the character's words to see the meaning of expression, if it is mellow,
Then do not sharpen, otherwise the level is gone, it is very subtle, repeated switching may not see the level of the missing, but in fact there is absolutely, you can see over time and film major categories: