remove object from gray image

how can I remove the object in following figure? the location of this object is the same in my images but some other objects may add in other locations to this image. is it possible to remove this mentioned object without any effect on the other parts of the image?

Answer 1

[Image Analyst]

Well, the difficulty depends on how "seamless" you want the resulting image to be. You can use seam carving (look it up). This is probably the best approach.

I don't think you can use panoramic image stitching because you would not have areas of overlap.

Or threshold the image and just slide the two halves of the image towards each other, either line-by-line or the whole half of the image rigidly. This might give a noticeable seam, though.