Describe the bug
Filtering on workbook parameters doesn't work. Current workaround is to use the .vf() method and prepend the filter name with "Parameters."

To Reproduce
with server.auth.sign_in(tableau_auth):
logger.info(f"Signed in to Tableau Server: {SERVER_URL}")
view_item = server.views.get_by_id(VIEW_ID)
logger.info(f"Fetched view: {view_item.name} (ID: {view_item.id})")

    # Set up image request options
    image_req = TSC.ImageRequestOptions()
    image_req.vf('Parameters.field_name', 'value')

    # Download the image
    server.views.populate_image(view_item, image_req)
    image_data = view_item.image

Results
No error is received

Source code ->
def append_view_filters(self, params) -> None:
for name, value in self.view_filters:
params["vf" + name] = value
for name, value in self.view_parameters:
params[name] = value

Might need to be ->
def append_view_filters(self, params) -> None:
for name, value in self.view_filters:
params["vf" + name] = value
for name, value in self.view_parameters:
params["vf_Parameters." + name] = value