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AndyColmes
USA
351 Posts |
 Posted - Mar 07 2017 : 03:32:04
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Basically, I have an image with some scattered pixels on a white background. I would like to use a Trackbar to smoothly "highlight" those pixels in a lighter or darker color or shade. How would I do this efficiently? I tried Gamma adjustments but it does not look very promising. I look forward to all your ideas on how to do this.
Thanks in advance.
Andy
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w2m
USA
1990 Posts |
Posted - Mar 07 2017 : 14:12:12
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As far as I understand imageen processing, I do not think this is possible, because it is extremely difficult to specify the location or X-Y position of the "scattered pixels". Nigel may have some ideas here, but I do not.
Nearly all of the processing functions will operate on a selection, so the problem is to identify the position of pixels that are isolated and then select the groups of pixels to be processed.
Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development |
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xequte
39001 Posts |
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AndyColmes
USA
351 Posts |
Posted - Mar 08 2017 : 00:06:53
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Thanks Bill and Nigel for the response. I am trying to apply sort of a Photoshop filter effect on the entire image and if the pixels are in a layer with alpha, then maybe I thought it would only affect the pixels.
I have tried several of the effects and the desired effect that has some success in terms of looks is Gamma/Saturation. But the process is slow and the image needs to refresh in its entirety, making the use of a Trackbar looks hesitant and clumsy. So, I thought maybe there is something else that I could use to smoothly put an effect on the image, like it is when adjusting the Transparency of the layer.
Andy
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xequte
39001 Posts |
Posted - Mar 08 2017 : 19:16:23
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Hi
I'm not quite understanding your requirements.
But what about if you generated an alpha channel, where it is opaque for pixels, and transparent for white. Then apply that to the image???
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
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AndyColmes
USA
351 Posts |
Posted - Mar 11 2017 : 23:03:53
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Hi Nigel, it is exactly what I am doing, but maybe with the size of my images, the process is slow and I thought maybe there is another way to enhance the pixels, or more appropriately, brighten the pixels. Is there possibly a third-party filter plug-in in ImageEn that can do this?
Andy
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How to enhance/brighten/colorize pixels
