Android Code Snippet Change / replace pixel colors in an image using RSImageProcessing

SubName: Using RSImageProcessing to change pixel colors
Description: Here is a quick example on how you can use RSImageProcessing to manipulate colors in an image.

Check out the attached zip files. One project is a simple traffic light system, the other project is a simple 50/50 color split changer. You need to know the exact color of the pixels that needs changing for this to work.

'Requires RSImageProcessing library
'The following code is the example used for the 50/50 colour split.

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")

    Dim RSIE As RSImageEffects

    Dim ImageViewTemp As ImageView
        ImageViewTemp.Initialize(Null)

    Dim BitmapTemp As Bitmap
        BitmapTemp.Initialize(File.DirAssets, "Image1.jpg")
        BitmapTemp = RSIE.ReplaceColor(BitmapTemp, Colors.Black, Colors.Red)

    ImageViewTemp.Bitmap = BitmapTemp

    Activity.AddView(ImageViewTemp, 0dip, 0dip, 100%x, 100%y)
End Sub

Tags: Image, Pixel, Change, Color

 

[sn_nn]

Hello! Works well!
Can i use RSImageProcessing for Fast replasing black pixels by pixel with diffrent range of Red?
(for example: if RGB(Red) component in pixel is more then 155 then replace black pixel)

 

[Erel]

You can do it with BitmapCreator.

Example: https://www.b4x.com/android/forum/threads/b4x-bitmapcreator-effects.93608/#content