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This is an original
frame grab from my digital video camera (720 pixels by 480 pixels). Digital
video uses a rectangular pixel which is taller than it is wide, so when
it is displayed on a computer monitor which uses square pixels, the image
appears stretched horizontally.
 This Here
is the frame after it was resized to the correct aspect ratio of 4 to 3,
or 640 pixels by 480 pixels. |
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Premiere 5.1c was used to export a video
frame from my DV camera as a single PICT image. When opened in PhotoShop
6 the PICT image appears stretched horizontally. This is because video
uses rectangular pixels that are taller than they are wide, and a computer
monitor uses square pixels,
so when the image is displayed on a computer monitor which uses square
pixels, it appears stretched horizontally. The DV video frame is
720 pixels x 480 pixels (my camera uses 720 x 480, your camera may be
slightly different). To compensate for the distortion the size will be
changed to 640 pixels x 480 pixels, which is a 4 x 3 aspect ratio.
To change the size and correct the distortion in the video frame, go to
Image/Image Size. In the Image Size dialog box uncheck Constrain Proportions
and check Resample Image. Then under Pixel Dimensions, change the width
of 720 pixels to 640 pixels, and leave the height of 480 pixels alone.
That setting will correct the distortion in the image, but since the image
is going to be used to make line art, a much higher resolution than the
frame's current 72 ppi is needed. So under Document size, change the Resolution
from 72 ppi, to 600 ppi (600 ppi to 1200 ppi is a good resolution for
line art) and click OK. Notice how the distortion is corrected.
Tip: If ram or disk space is an issue, you can change the resolution
later, after the frame has been converted to Grayscale.
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