Photo editing by Image sharpening

May 27 • Notes • 1049 Views • 1 Comment on Photo editing by Image sharpening

Photo editing by Image sharpening 

Objectives:

Photo editing or Sharpening is one of the most impressive transformations you can apply to an image since it seems to bring out image detail that was not there before. What it actually does, It is to emphasize edges in  image and also make them easier for the eye to pick out — while the visual effect is to make the image seem sharper, no new details are actually created. Paradoxically, the first step in sharpening an image is slightly blur it . then the original image and the it compared one pixel at a time that is this blurred version  . If a pixel is brighter than the blurred version it is lightened further; if a pixel is darker than the blurred version, it is darkened. The result is to increase the contrast between each pixel and also its neighbors. The nature of the photo editing or sharpening is influenced by the blurring radius used and the extent to which the differences between each pixel and its neighbor are exaggerated.

Sharpening Methods or photo editing methods :

Picture Window offers 3 sharpening or photo editing techniques : Heavy Sharpen,  Sharpen, and Un sharp Mask. Sharpen and Heavy Sharpen are the most straightforward methods. They are computed similarly, but Sharpen blurs the pixels in the image based on only its four closest neighbors and exaggerates the differences moderately while Heavy Sharpen blurs by using the eight nearest neighbors and exaggerates the differences more. In either case, you can moderate the effect by setting the Amount slider back from its 100% maximum value.

Over sharpening:

when you continue to sharpen or editing  the image, several things happens:

1. Edges become unnaturally pronounced—dark objects are outlined with light halos and light objects are outlined with dark halos.

2. Normally invisible noise in the image is amplified and starts to show up as texture in areas that looked smooth in the original images. This can create an undesirable graininess in parts of photographs that should be smooth like clouds and skies.

3. Extreme sharpening causes the image to break up as each individual pixel stands out more and more from its neighbors.

 

Thus as you progressively sharpen a slightly blurry image, it first starts to look better, but then as you begin to it over sharpen , it starts to looking worse again. Once you know what over sharpening looks like, you will be able to spot it on the screen and back off a little.

 

Using the Sharpen transformation:

 

The best way to set up Picture Window’s Sharpen Transformation is to zoom the input image in to a magnification factor of 1:1 or even 2:1 and the zoom the Preview window in to the same magnification factor and scroll the two windows as necessary to display the same part of the image. Re-size and reosition the two windows so they are next to each other across the top of the screen.  If you want to sharpen just part of an image, leaving the rest alone, you will need to create a mask that isolates the region of interest and then select this mask into the Amount control. Making and using masks is covered in the Picture Window manual and help file.

Question answers:

Q1: What is over-sharpen?

Ans:   when you continue to sharpen or editing  the image, several things happens:

1. Edges become unnaturally pronounced—dark objects are outlined with light halos and light objects are outlined with dark halos.

2. Normally invisible noise in the image is amplified and starts to show up as texture in areas that looked smooth in the original images. This can create an undesirable graininess in parts of photographs that should be smooth like clouds and skies.

3. Extreme sharpening causes the image to break up as each individual pixel stands out more and more from its neighbors.

Q2: What is actually does the Photo editing techniques?

Ans: It is to emphasize edges in  image and also make them easier for the eye to pick out — while the visual effect is to make the image seem sharper, no new details are actually created

Q3: Picture Window offers How many sharpening or photo editing techniques ?

Ans: 3

Q4: What are the 3 sharpening or photo editing techniques?

Ans: Heavy Sharpen,  Sharpen, and Un sharp Mask.

Q5: What is actually ( photo editing) or image sharpening ?

Ans:  Photo editing or Sharpening is one of the most impressive transformations you can apply to an image since it seems to bring out image detail that was not there before.

 

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One Response to Photo editing by Image sharpening

  1. Prabhat Saxena says:

    Image editing encompasses the processes of altering images, whether they be digital photographs, traditional analog photographs, or illustrations. Traditional analog image editing is known as photo retouching, using tools such as an airbrush to modify photographs, or editing illustrations with any traditional art medium.Interested people can refer it.

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