[Qgis-user] Enhancing Raster Images

[Siki Zoltan]

Hi,

I suppose blending is not the best solution, because i depends on other 
layers.
Why don't you use transparancy tab of the properties of the raster?
There you can set pixel values to be transparent (0-100%). In your case 
from 0 to 0 value 100% transparent
Then change render type to Singleband pseudocolor on the style tab and set 
individual color for any value.
In your case add 1 to the list and select a color for it.

Zoltan

On Tue, 12 Aug 2014, G. Garibaldi wrote:

> Beginning with a black and white raster, black lines on a white background, 
> I'd like to end up with a raster image with no white background with only the 
> black lines showing. Additionally, I'd like the black lines to be a different 
> color, bright red, bright green, etc.
>
> This is what I've done:
>
> Select raster layer properties>color rendering>blending mode>burn.
>
> This removes the white background and shows only the black lines.
>
> Going further and selecting properties>hue>colorize only lightly tints the 
> black lines to the selected color, not really the desired result.
>
> How can I make the properties>hue>colorize change the black lines to some 
> bright highly saturated color?
>