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A Tour of Adobe Premiere > Superimposing an image

Superimposing an image

In the previous section, you used the Camera Blur filter to blur the second half of the final clip. Now you'll superimpose a company logo on top of this clip, making it appear as if the camera is now focusing on the image.

Choose File > Import > File. Then locate and select the Veloman.eps file in the Clips folder within the Tour folder. Click Open.

From the Project window, drag the Veloman.eps image into the Video 2 track.

Choose Window > Show Info if the palette is not already open, and adjust the image so that its In point is set to 0:00:25:00 (shown as "Starting at: 0:00:25:00" in the Info palette).

By default, the duration of a still image is set in the General Preferences at 30 frames. Because the frame rate of your video program is 15 frames per second, the duration of the image is 2 seconds. To keep the image visible until the end of the video program, you'll need to extend its duration. Unlike a motion clip, a still image duration can be specified by stretching the clip representation in the Timeline.

In the Timeline window, select the selection tool.

Drag the right edge of the Veloman.eps image to the right until it snaps to the end of the Finale.mov clip.

The image now overlaps the Finale.mov clip in the Timeline window. The overlapping area is where the logo will be superimposed on the bike race.


Hold down the Alt key (Windows) or the Option key (Mac OS) and drag in the time ruler over the area where the two clips overlap.

As expected, all you see is the Veloman.eps image; you don't see the Finale.mov clip at all. That's because the Veloman.eps image is still fully opaque. Now you'll make the background of the Veloman.eps image transparent.

To specify that certain areas of a clip become transparent and other areas remain opaque, you need to use a transparency key. A transparency key (often referred to simply as a key) makes designated colors (or a range of colors) in a clip transparent or partially transparent. A blue screen key, for example, makes a shade of blue transparent; in this way, an actor can be filmed in the studio against a blue screen, and then superimposed on an outdoor action scene. Creating transparency with a particular color is called keying out that color. To superimpose the Veloman.eps image, you need to key out the white background.

Select the Veloman.eps image in the Timeline window, and then choose Clip>Video>Transparency.

The Transparency Settings dialog box shows the selected clip in the Sample area. The key you choose is applied to the clip, and the resulting effect is displayed in this area.

Select the Page Peel icon, which displays the actual clips in the Sample area.

In the Transparency Settings dialog box, choose White Alpha Matte for the Key Type. The White Alpha Matte key will key out any areas of alpha white in an image that contains an alphachannel.

In the Sample area of the dialog box, the white areas of the Veloman.eps image are now transparent, letting the underlying image—the Finale.mov clip—show through.

Click OK.

To preview the effect, hold down the Alt key (Windows) or the Option key (Macintosh) anddrag in the time ruler over the area where the superimposition occurs.

Save the project.



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