How to delete transparent pixels from an image?

[meifwong]

I have an image, but it has both opaque, half-transparent (anywhere between a visibility of 1% to 99%) and transparent pixels. Can I convenietly delete any pixel with a transparency of 1% to 99% (not fully transparent and not fully opaque)?

[BoltBait]

Here is a CodeLab script to do what you want:

 

// Name: Transparency Threshold
// Submenu: Adjustments
// Author: BoltBait
// Title: Transparency Threshold v1.0
// Version: 1.0
// URL: https://forums.getpaint.net/topic/119839-how-to-delete-transparent-pixels-from-an-image/
// Help: Copyright (C)2022 BoltBait
#region UICode
IntSliderControl Amount1 = 128; // [0,255] Threshold
CheckboxControl Amount2 = true; // Maximize alpha of remaining pixels
#endregion

void Render(Surface dst, Surface src, Rectangle rect)
{
    ColorBgra currentPixel;
    for (int y = rect.Top; y < rect.Bottom; y++)
    {
        if (IsCancelRequested) return;
        for (int x = rect.Left; x < rect.Right; x++)
        {
            currentPixel = src[x,y];

            if (currentPixel.A <= Amount1)
            {
                currentPixel.A = 0;
            }
            else
            {
                if (Amount2)
                {
                    currentPixel.A = 255;
                }
            }
            dst[x,y] = currentPixel;
        }
    }
}

 

 

If someone gave you a CodeLab script and just want to know what to do with it, read this: 
https://forums.getpaint.net/topic/111233-codelab-for-average-users-a-laymans-guide/

 

 

Enjoy.  

 

[Pixey]

5 hours ago, meifwong said:

Can I convenietly delete any pixel with

 

How about using AA's Assistant on your image/text.

[MJW]

Red ochre's Alpha threshold plugin can do that.