invalid system.string to system.drawing.image.

Dim ds As New DataSet
Dim bs As New BindingSource
ds.ReadXml("D:Project1people.xml")
bs.DataSource = ds.Tables(0)
Me.DataGridView1.DataSource = bs

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
  <record>
    <Id>1</Id>
    <Name>Jack</Name>
    <Dob>22-3-1991</Dob>
    <Function>Function1</Function>
    <Picture>D:PicturesJack.jpg</Picture>
</record>
  <record>
    <Id>2</Id>
    <Name>Taylor</Name>
    <Dob>16-8-1976</Dob>
    <Function>Function2</Function>
    <Picture>D:PicturesTaylor.jpg</Picture>
</record>
  <record>
    <Id>3</Id>
    <Name>Haley</Name>
    <Dob>8-1-1988</Dob>
    <Function>Function1</Function>
    <Picture>D:PicturesHaley.jpg</Picture>
</record>
</root>