Filtering

After tapping the "Filter" button in the original image view, the video preview becomes applied filtering continuously and the result is displayed on the filtering view shown in the right screenshot. Among red, green, yellow, and blue filters, the filter applied at this time is the one that was last selected. (Red filter is applied when it's for the first time.)

In addition to the ordinary operations such as zooming in and out, the following operations are available in the filtering view:

• Show the original image
  Tap the leftmost button on the upper navigation bar to go back to the original image view.
• Alter filter to be applied
  Red filter, green filter, yellow filter, or blue filter is applied to the image by tapping corresponding button on the segment control in the lower tool bar. The name of filter that is being applied is shown in the center of the upper navigation bar.
• Adjust filtering range and select transform options
  Tap the rightmost button on lower tool bar to show a setting view corresponding to the filter that is being applied.