Using Images for Dropdown Options in MS Lists

Greetings,

I have a list on an internal company SharePoint 365 site where I'm trying to add the ability for users to select images instead of text from a choice column.

I've stored the images on the same SharePoint site.

I've added the below JSON code (with the actual links to the images, not the redacted text you see for company and department name) to the choice column's formatting field. 

However, the images just show up like this:

Any ideas on what I'm doing wrong?

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "children": [
    {
      "elmType": "img",
      "style": {
        "position": "relative",
        "top ": "50%",
        "left": "50%",
        "width": "24px",
        "height": "24px",
        "margin-left": "-50%",
        "margin-top": "0%"
      },
      "attributes": {
        "img src": "=if(@currentField == 'Consistently Positive', 'https://MYCOMPANYNAME.sharepoint.com/:i:/r/sites/MYDEPARTMENTNAME/Shared%20Documents/_Resources/Trend%20Arrows/consistently%20positive%20trend%20(up%20arrow).png?csf=1&web=1&e=PalSfh', if(@currentField == 'Recently Positive', 'https://MYCOMPANYNAME.sharepoint.com/:i:/r/sites/MYDEPARTMENTNAME/Shared%20Documents/_Resources/Trend%20Arrows/recent%20positive%20trend%20(up-right%20arrow).png?csf=1&web=1&e=faw6kP', if(@currentField == 'Neutral','https://MYCOMPANYNAME.sharepoint.com/:i:/r/sites/MYDEPARTMENTNAME/Shared%20Documents/_Resources/Trend%20Arrows/neutral%20trend%20(right%20arrow).png?csf=1&web=1&e=YbDLiG', if(@currentField == 'Recently Negative','https://MYCOMPANYNAME.sharepoint.com/:i:/r/sites/MYDEPARTMENTNAME/Shared%20Documents/_Resources/Trend%20Arrows/recent%20negative%20trend%20(down-right%20arrow).png?csf=1&web=1&e=hk1MAM', if(@currentField == 'Consistently Negative','https://MYCOMPANYNAME.sharepoint.com/:i:/r/sites/MYDEPARTMENTNAME/Shared%20Documents/_Resources/Trend%20Arrows/consistently%20negative%20trend%20(down%20arrow).png?csf=1&web=1&e=CzakF5')))))"
      }
    }
  ]
}

Thanks in advance.