[Qgis-user] Enhancing Raster Images

[G. Garibaldi]

Ah, don't blend.

On 8/12/2014 2:28 PM, Siki Zoltan wrote:
> 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?
>>
>

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