Sharpening (Sharpening)

Sharpening (Sharpening) common photo sharpening method there are two kinds, the reader in mind these two methods is not possible to mix. Photos of optical sharpness has the quality of the lens and sensor; the sharpness is simulation software for optical sharpness effect, by increasing the screen edge contrast, sharpness pictures look better. Software sharpening must have photo resolution sharpening (Sharpening)

Common photo sharpening method there are two kinds, the reader in mind these two methods is not possible to mix.

Photos of optical sharpness has the quality of the lens and sensor; the sharpness is simulation software for optical sharpness effect, by increasing the screen edge contrast, sharpness pictures look better. Software sharpening must have photo resolution is carried out on the basis of, will not be able to create photo details, you can only highlight the original details. Original photo zoom 2 x comments sharpening Sharpen edges softer edges sharp after due to excessive sharpening of Halo

From the above example, a moderate amount of sharpening can make the screen edge more clean and clear.

On the contrary, too of sharpening will make objects edge halos, appears a people very uncomfortable. This sharpening methods by creating a white outer circular Halo (making circle near the edge of the light gray background more bright) and a black internal circular Halo (making circle near the edge of the dark gray pixel color more dark) to achieve the purpose of the sharpening. Because white Halo Halo with black contrast between the background than light gray and dark gray circles of contrast is high, therefore can give people a "screen will have the" sharp "illusion". However, this kind of Halo if clearly appear in the photo, the photo will affect the image. However, this is very halos are often difficult to eliminate, unless you take a picture with RAW format (see below).

Sharpening in camera

As photo handler a default section, the camera automatically photographs with different degree of sharpening to eliminate color filter array device for decoding process (the process slightly lower screen detail sharpness), detailing the loss of sharpness.

However, excessive camera will have difficulty in sharpening of Halo, increase visible sawtooth, noise and other non-natural scene. Associate professional-grade digital cameras and digital SLR you can let the user select the degree of sharpening in camera, or even on the image processor "not sharpen" directive.

Software sharpening

If your camera is provides users with a shooting RAW format photos feature, users can turn off the sharpening in camera, photos directly to your PC after software for sharpening.

Software sharpening allows us to follow the photo output end, freedom to choose the degree of sharpening, and avoid annoying Halo. For example, when you want to put the photos on display browse or placed in a network share, you need to increase the sharpness, displaying photos photos of wonderful details; when you want to print the photo, you only need to gently sharpening photos, because excessive sharpening can make printed photos look unreal. If your camera is not RAW format output, or you just want to use the JPEG format, please try to use the camera in sharpening, because computer software usually lags behind the camera sharpening the image processor in the sharpening effect. One of the reasons is that the camera is in the photos within the sharpening is compressed into JPEG format before completion, only the software sharpens compressed JPEG photo sharpen, sharpen the latter makes JPEG compression signs more visible. If you feel that the effect of camera sharpening in obvious enough, of course, you can later use the software for sharpening. But please keep in mind that readers: Photo sharpening is easy, but to eliminate excessive sharpening marks would be very difficult.