Custom error messages for images

I'm trying add custom error messages for image validations:

$this->validate($request, [
            'file' => 'required|max:1000|file|image|dimensions:max_width=200,max_height=60,min_width=75'
        ]);

How can I add custom messages for each validations?

I tried something like this:

$messages = [
            'required'   => 'An image file is required!',
            'max'        => 'The file size should be less than 1MB!',
            'image'      => 'The file has to be an image file!',
            'dimensions:max_width' => 'The image cannot be wider than 200px!',
            'dimensions:min_width' => 'The image cannot be shorter than 75px in width!',
            'dimensions:min_height' => 'The image should be less than 60px in height!',
        ];

        $this->validate($request, [
            'file' => 'required|max:1000|file|image|dimensions:max_width=200,max_height=60,min_width=75'
        ], $messages);

and it didn't work I guess.