Nosferatu Translator
Joined: 01 Nov 2008
Posts: 79
|
|
Rotating is one of the most basic step along with Cropping and Leveling. Do not forget these three. They are the foundations of a clean scan.
Rotating a scan is necessary when a scan is tilted. There are many ways to check if a scan is tilted. I'll tell you two ways. You can use either the Rectangular Marquee Tool or Guides. You can use whichever one you like better.
Rectangular Marquee Tool
Select the tool and use it to draw a line along the border of a frame or frames. If the border and line do not line up or are not parallel, then the scan will need to be rotated.
Click to see full size image
Guide
The easiest way for me to use a guide is by using rulers. All you have to do is click on a ruler and drag, then a guide is created. If you want a horizontal guide, click and drag on the horizontal ruler. If you want a vertical guide, then click and drag on the vertical ruler.
You can use the move tool to move the guide around. If you want to hide your guides hit 'Ctrl+;' or if you want to remove your guides just drag it back to the ruler.
If you do not see rulers running along your scan's window, then select 'View>>Rulers' from the drop down menu at the top.
To check if the scan is tilted, create a guide and drag it over next to the border of a frame or frames. If the border and the guide do not line up or are not parallel, then the scan needs to be rotated.
Click to see full size image
Measure Tool
You can use the measure tool to help you figure out how far the page needs to be rotated(may be hidden under the Eyedropper tool). You just need to click on one end of a panel and drag to the other end, then let go.
Click to see full size image
It'll measure how tilted the page is. So that in the next step a value will already be filled in for the rotate angle(takes care of the guesswork).
Rotating
Select 'Image>>Rotate Canvas>>Arbitrary...' and the following window will pop up.
The number you input will be the degree by which the image rotates. Each scan is different, but generally the values 0.1 to 1.0 or -0.1 to -1.0 is enough of a rotation range. You can change the direction of the rotation by select 'CW' or 'CCW' in the same window or simply go positive or negative with the number you input.
You'll need to keep rotating the image until the guide or marquee tool lines up with the frames' border. If you over rotate, its better to hit the undo key(Ctrl+z) rather than rotate back, so that you don't end up with too much extra space along the border. It takes practice to roughly gauge the rotation needed and get fairly close with the first rotation, but you'll eventually get it.
This is what it looks like when the scan is straight:
Rectangular Marquee Tool
Click to see full size image
Guide
Click to see full size image
-------------------------------------------------------------------------------------
Previous Step:Grayscale:
http://awillfulmuse.myfastforum.org/about632.html
Next Step: Cropping:
http://awillfulmuse.myfastforum.org/about634.html
|
|
|
|
