The picture has been adjusted in Lightroom, end set to monochrome colours. Then I combined the monochrome image with te original image in Photoshop with the original on top of the monochrome. With the eraser I erased everything from the top layer except the red poppy. You see the result on the right.
This is what I love about digital imaging. 15 years ago I used to get the same result by printing a black & white photo and then colouring with transparant ink. Hell of a job to achieve. And now the result is way better. I will try to scan some of the old photos that were ink coloured, and place them on the site.
[shot with Canon 5D, 24-70mm f2.8, daylight, polarization filter]