$image->annotateImage($draw, 10, 45, 0, 'The quick brown fox');
If the third parameter, the 'Y' value, is 0, the text will be invisible because the text is printed ABOVE the image - not on the image.
The solution is to start, depending on your chosen font size, with a Y value of about 40 and experiment.
When wishing to print some text on a photograph and make that text sufficiently contrasting to the background image, use a 4 byte code for colour and transparency.
It is the same 4 byte code using by the parameter '-undercolor' in ImageMagick's command lime instruction 'convert'.
The first 3 bytes are the RGB colour code and the fourth byte is the transparency byte.
$picin = new Imagick($pic1);
$height = $picin->getimageheight();
$draw = new ImagickDraw();
The example code produces yellow text on a semi-transparent red background.
$pic1 and $pic6 were previously defined as directory/file strings.