In this article, we will address the issue of black lines appearing on some scenes or photos uploaded to CloudPano, explain why this occurs, and provide guidance on how to prevent it from happening in the future.
Why do black lines appear on uploaded images?
Black lines are not added by CloudPano.
Black lines may appear when the photo has been edited, and a black line has been unintentionally added to the margin of the photo by the user or by the photo editing program.
Many users are not aware that a black line has been added, but we will show you how to determine if a black line exists and how to prevent it in the future.
Example of a black line on a scene
Here is a sample scene with a black line.
How to determine if black line exists on your image
1. On your computer, open the your scene photo in an application like OS X Preview.
2. Zoom in on the image to 400%-1000%. You will be able to see individual pixels.
3. Scroll over to the left or right side, and view the farthest column of pixels. You will typically see that this farthest column of pixels is a darker color or completely black.
Here is the column of pixels that are creating the black line from our example image.
Another way to validate that a black line is added by an image editing program is to upload your edited/post-processed image AND your original image. Viewing these images on CloudPano, you will likely observe the black line does not exist on the original, but does exist on the edited image.
Conclusion
CloudPano never adds black lines to your photos, and these lines typically exist due to editing. To avoid black lines in the future, investigate your image editor's workflow to determine what might be causing the issue.