You should pay attention to copyrights when using images, charts or pictures taken/made by others in your own work. However, quoting images in your work is allowed when the source is properly indicated and the quoted image is discussed in and relevant to the text.
Images with an open licenced can be re-use without a separate permission from the copyright holder, but remember to citate the picture properly. To find picture with open licences, try the following databases:
Read more about the permitted use of images, and where to find them in Aalto University's ImagOA guide.