Gray scale image to color

Question

enter image description hereIs there a way to convert a gray-scale image to a colour image?

Here's a few JPG examples

1. Photo 1
2. Photo 2
3. Photo 3

ImageMagick is powerful but doesn't seem capable of converting to a colourful version.

Answer 1

Unfortunately this is not possible. Grayscale images do not contain sufficient information to create a color image. In instances where you see B&W/Grayscale images converted to color, this has been done manually in an application such as photoshop.

You can use imagemagick to apply a filter but you cannot re-introduce color. http://www.imagemagick.org/Usage/color_mods/#level-colors