Python Code:
        class Test(models.Model):

       _name = "test.test"_name = "test.test" 

        image = fields.Binary(attachment=True)

XML Code:
                <record id = "test_id" model = "ir.ui.view">

                        <field name = "name">Test Image</field>

                        <field name = "model">test.test</field>

                        <field name = "arch" type = "xml">

                        <kanban>

                                    <field name="image" />

                        <templates>

                                <t t-name="kanban-box">

                                <div class="oe_resource_vignette">

                                <div class="oe_resource_image">

                                        <img t-att-src="kanban_image('test.test','image',record.id.raw_value)" class="oe_resource_picture"/>

                              </div>

                            </templates>

            </kanban>

            </field>

      </record>