APhoto - How Can I Change All Instances Of A Picked Colour?

[jubro]

I have a b&w image which has hundreds of airborne 'white' sparks & I want to be able to change their colour. It's nigh on an impossible task to select them all, so I am wondering if there is a way I can colour-pick the tone of one of them & then universally fill all the instances in the image that are the same tone. If this is possible, is it also possible to set a tonal range to which a colour can be universally applied?

Thanks

[Pšenda]

Flood Select Tool, Flood Fill Tool, LUT? 

[kirkt]

I assume you are working with a pixel-based image (as opposed to a vector image - you mentioned "instances" but I am assuming that these are not separate objects).  The sparks are the brightest parts of the image and are well-defined, so you can make a mask where the sparks are white and everything else is black.

Then make a rectangle with the rectangle tool and fill it with the color you want (or a gradient, or whatever) and apply the mask.  Set the blend mode of the rectangle layer to something like Linear Light.  See example attached - I used a gradient.  Because you use a rectangle shape (instead of filling a pixel layer) you can edit the fill once it is initially laid down, or change it to another fill type (color to a gradient, etc.).

Is this what you are going for?

Kirk

[kirkt]

Here is the mask.

kirk

 

[jubro]

20 hours ago, kirkt said:

I assume you are working with a pixel-based image (as opposed to a vector image - you mentioned "instances" but I am assuming that these are not separate objects).  The sparks are the brightest parts of the image and are well-defined, so you can make a mask where the sparks are white and everything else is black.

Then make a rectangle with the rectangle tool and fill it with the color you want (or a gradient, or whatever) and apply the mask.  Set the blend mode of the rectangle layer to something like Linear Light.  See example attached - I used a gradient.  Because you use a rectangle shape (instead of filling a pixel layer) you can edit the fill once it is initially laid down, or change it to another fill type (color to a gradient, etc.).

Is this what you are going for?

 

 

Yes, that's a great solution Kirk. Thanks very much!!!