This article shows how to embed an image in ActiveReportsJS.
Steps to Complete:
Add an image control onto the report service
Go down to the bottom right-hand corner and set Properties Mode to Show Advanced Properties.
Next, select the Image control and goto that control’s Properties. In the properties, go to Appearance > Image.
Expand the Image property and select the down arrow to see the options
Select the Embedded option and then click the load button to load an embedded image to your report
Lastly, set the Source property to embedded