How can i add an image field in focus point wizard of bw_focuspoint_images typo extension

I want to add an image field in focus point wizard of bw_focuspoint_images typo extension. Please help. I have added an Image text field by using following code PageTS. But I want that field type to a file upload not a text type. when I give type=file its not working.

mod.tx_bwfocuspointimages.settings.fields {

name {
    title = LLL:EXT:bw_focuspoint_images/Resources/Private/Language/locallang_db.xlf:wizard.fields.name
    type = text
}

description {
    title = LLL:EXT:bw_focuspoint_images/Resources/Private/Language/locallang_db.xlf:wizard.fields.description
    type = textarea
}

image {
    title = LLL:EXT:bw_focuspoint_images/Resources/Private/Language/locallang_db.xlf:wizard.fields.image
    type = text
}

color {
    title = LLL:EXT:bw_focuspoint_images/Resources/Private/Language/locallang_db.xlf:wizard.fields.color
    type = select
    options {
        red = LLL:EXT:bw_focuspoint_images/Resources/Private/Language/locallang_db.xlf:wizard.fields.color.red
        green = LLL:EXT:bw_focuspoint_images/Resources/Private/Language/locallang_db.xlf:wizard.fields.color.green
        blue = LLL:EXT:bw_focuspoint_images/Resources/Private/Language/locallang_db.xlf:wizard.fields.color.blue
    }
}

link {
    title = LLL:EXT:bw_focuspoint_images/Resources/Private/Language/locallang_db.xlf:wizard.fields.link
    type = link
}

}

I have inserted a link field for my extra image field. But when I link the image from the file it is not working. Below is the way I am inserting image and result what I get. enter image description here

enter image description here

Here is the code for image.

 <img src="{point.image}">