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how to smooth jagged lines in image in photoshop cs4?

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Topic:  Photoshop   Product:  other   Related Artilces:  lisp smooth jagged polyline   cad smooth jagged line   smooth jagged line autocad
Mjones
I am editing a image using photoshop cs4. I want to smooth the jagged lines in the image. But I don't know how to do this. Who knows the way? Please help me. Thank you very much! Asked Dec, 18 2010
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Quqin

  1. Open Photoshop, click the "File" menu and click "Open." Browse to a photo with edges to smooth and double-click the file name so the image opens in the Photoshop workspace.

  2. Click the "Magnifying" tool, which looks like a magnifying glass or lollipop on the bottom of the "Tools" palette on the left side of the screen. Zoom in on a sharp edge within the photo.

  3. Click the "Blur" tool, which looks like a raindrop on the "Tools" palette. If you do not see the raindrop, right-click the icon of a hollow triangle or a pointing finger. These three tools all share the same space until they are used. Select the "Blur Tool" from the right-click menu.

  4. Pull down the brush menu at the top of the screen; it is the second button from the left on the toolbar, though it is not labeled. Select a round, fuzzy brush and slide the brush size menu to about 50 pixels or a size to fit the edges in your image.

  5. Press and hold down your left mouse button and click and drag your cursor over the sharp edge in the photo. The edge begins to get smoother as it blurs. Drag over the edge just once to smooth it out; drag repeatedly over the edge to create a smoother but blurrier effect. The more times you drag over an edge, the blurrier it becomes.

  6. 6

    Smooth the edges in your entire picture by enlarging the size of your brush in the brush menu, such as 200 pixels, and dragging your cursor over the picture. All the edges become smooth.

  7. 7

    Click the "File" menu and click "Save As." Type a new name for the picture; don't save it with the same name as the original or you won't be able to access the non-smoothed version in the future.

 

Answered Oct, 28 2010
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Shenry

It depends on what exactly you want to achieve (perfection of simply acceptable).
The technique is rather complicated as you have to create an edge mask. This means that with a mask you tell photoshop which pixels it may affect, say, blur, and which ot, and in what degree if you have greys/ soft transitions.

This said, is the image a jpeg?
When you enlarge an image in Photoshop or any other pixel-based graphics application (PaintShop Pro, the Gimp,...) you actually tell the software to create new pixels for you. In your example you have 687 pixels at your disposal, each pixel with its own data about colour, and you tell PSCS to nearly double that number. These new pixels are empty, and CS must create colour values based on the existing neighbouring pixels.
CS has good algorithms to calculate, but a decay in quality is inevitable. Upsampling should always be avoided as you would the black pest.
When there is no alternative, the best way to get acceptable results is to upsample in small steps, and taking care you never take an easy step like doubling. Answered Mar, 11 2011
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Aramos

1
pen your previously loaded lineart file or import it from a scanner. If you are scanning your art, make sure to use at least 150 dpi. Resize the image to the desired resolution.
2

Expanding the Selection
Use the magic wand tool to select the background to the lineart. Use the expand selection tool to grow the selection until it touches the visible edges of the lineart.
3

Cutting Out the Background
Use the "File" menu to access the "Feather" selection tool. Feather the selection at around 0.5 pixels. Now, right-click on the selection and use the "Cut" tool to remove the background. If the layer won't allow you to cut the pixels, then you must double-click on the image layer and name it. This will unlock it and allow for editing.
4

Feathering the Inverse
Right-click on the selection again and then click on "Select Inverse." This will reverse the selection around the lineart. Now, navigate back to the "Feather" selection tool and feather the selection another 0.3 pixels.
5

Painting the Selection
While keeping the selection active, navigate to the "Paintbrush" tool. Expand the brush size to about half the size of the lineart. Use the swatches or the color selector to achieve the color you desire. Paint completely over the lines. Your lineart should now be smoothed and ready for coloring.

Read more: How to Smooth Lineart Using Photoshop | eHow.com http://www.ehow.com/how_4504909_smooth-lineart-using-photoshop.html#ixzz1EJO8yq9H Answered Feb, 21 2011
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