Substracting RGB gray level ranges from an image.

cishfish · March 2015

Dear colleagues,
After obtaining the RGB histogram of an image, I would like to be able to change the image based on a specific range of RGB gray levels. This procedure will allow me to obtain a new image that ignores/delete/substract specific RGB ranges from image.
Thanks in advance,
Edmond

YuriG · March 2015

Hi Edmond,

You can create a new color image with given RGB values (using File | New) and subtract it from active image using Calc.
You can also do it in a macro subtracting array of 3 RGB values:

    Public Sub SubtractColor
        'subrtact Red, Green, Blue values from image
        Dim col() As Double={50,100,150}
        ThisApplication.ActiveImage.Op.Sub(col)
    End Sub

Regards,

Yuri

Substracting RGB gray level ranges from an image.

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