Damage of the kind shown in your pics is regularly repaired/restored, by professionals and by do-it-yourself owners.
When considering any repair/restoration work, whether you plan to do it yourself or to hire a professional, there are three good sources of information about canoe restoration that you would do well to get, or at least look at, before making any decision about how to repair or restore your canoe:
The Wood and Canvas Canoe: A Complete Guide to its History, Construction, Restoration, and Maintenance by Rollin Thurlow and Jerry Stelmok
Building the Maine Guide Canoe by Jerry Stelmok
This Old Canoe: How To Restore Your Wood-Canvas Canoe, by Mike Elliott
The first is often called the "bible" of canoe repair, restoration, and maintenance; the second is an excellent study of the wooden/canvas canoe and its construction. The third is the most recently published and has been well received.
Of course, you can always ask questions here on the forums.