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Viewing Image File Differences

Article ID: 630  |  Last updated: 23 Dec, 2014

You can diff image files to compare differences between file versions.

  1. Select the file.
  2. Choose Activities > Differences.
  3. Select a Second File option.
  4. Click Advanced to select a branched file or historic file version.
  5. Click Differences. The Image Comparison viewer opens.
  6. Select a viewing option to compare the images.
    • Click View Side by Side side by side button to view the two versions side by side.
    • Click View Top over Bottom  to view the two versions top over bottom.
    • Click Combined Differences  to view the result of subtracting the pixel values of one image from the other.
    • Click High Contrast Combined Differences  to view the high contrast result of subtracting the pixels values of one image from the other. This view can help you identify subtle color differences.
  7. Increase or decrease the magnification of the images.
    • Click Zoom In  to increase magnification.
    • Click Zoom Out  to decrease magnification.
    • Enter a magnification percentage to increase or decrease magnification.
    • Click Actual Size  to view the images at actual size.
  8. Click Close when you finish comparing the images.

Example

You can see obvious differences when you compare images side by side or top over bottom. In the following example, the images are shown in side-by-side view. Notice the light blue stripes in the image on the left are not in the image on the right.

Viewing combined differences shows the result of subtracting the pixel values of one image from the other. In the following example, you can see what changed in the image.

Another change was made to the image that you cannot see when you view images using the previous options. Viewing high contrast combined differences shows you the high contrast result of subtracting the pixel values of one image from the other. This view is helpful to compare tone differences between images that are difficult to see. In the following example, you can see that a change was made to the dog's tongue.

Article ID: 630  |   Last updated: 23 Dec, 2014
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image files differences

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