Operation Manual

542 | CorelDRAW X8 User Guide
Straighten image dialog box
Correcting camera lens distortions
With photos that contain camera lens distortions, it is recommended that you start with correcting the lens distortion. You can correct two
types of lens distortions, which make straight lines in photos appear curved: barrel and pincushion. Barrel distortions make photos appear
pushed out at the center. Pincushion distortions make photos appear pushed in at the center.
Rotating and previewing
The Straighten image dialog box lets you rotate an image by moving a slider, typing a rotation angle, or using the arrow keys. You can
specify a custom rotation angle from -15 to 15 degrees.
You can use the preview window to dynamically preview the adjustments that you are making. If you want to change the orientation of the
image before straightening it, you can start by rotating the image 90 degrees clockwise and 90 degrees counterclockwise.
A grid is displayed in the preview window to help you straighten the image. You can make more precise adjustments by controlling the cell
size of the grid. To heighten the contrast of the grid against the colors of the image, you can change the grid’s color. You can also hide the
grid if you want to preview the final result without the gridlines. In addition, you can zoom in and out, and pan the image in the preview
window to evaluate the results.