Sharpening and Cropping
Sharpening helps enhance the blurry images. Cropping helps you to trim the images of the unwanted portions.
Sharpening is used in order to enhance things a bit. Let us see these tools:
Unsharp Mask. Detects the image's edges and then enhance them by adding a tiny white halo. The unsharp mask filter has three settings,
- Amount. The edges become more predominant if you turn up this setting.
- Radius. The white actually turns into a glow if you turn up this setting.
- Threshold. It adjusts the sensitivity of the edge detection
To use Unsharp Mask. Choose Filter > Sharpen > Unsharp Mask. In the Unsharp Mask dialog box click preview so that you can see the result on the main image.
Adjust the Amount and radius sliders until you get a good balance. Turn the preview on and off for a comparison of the effect before and after. Set the threshold slider to an acceptable level, affecting only the detail that you choose. Click Ok.
Original image
Sharpened image
Cropping is the equivalent of taking out a pair of digital scissors and trimming away the portions of the image we want to discard. To crop, Choose the crop tool from the tool palette. Click and drag inside the image, as you would with the rectangular marquee tool.
Click and drag any of the eight resizing handles to change the size of the marquee. Click inside the selected window and drag to reposition the cropped area. To apply the crop double-clicks your mouse inside the cropped area.
Note: The crop tool can be used to straighten images while you are cropping them.
