Help with loading image and altering hue, saturation

#1 Posted : Wednesday, June 6, 2018 3:53:05 AM(UTC)

Nguyễn minh Vân

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Posts: 1

I am trying to figure out how to load an image (jpg or otherwise) from my HD into a RasterImageViewer (or other object), alter the hue, saturation, etc... and finally save the file.

I am coding in VB.NET so a VB.NET example would be prefered.

Thanks in advance

#2 Posted : Wednesday, June 6, 2018 2:38:10 PM(UTC)

Nick Villalobos

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Posts: 119

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Hello,

Below you will find a link that will take you through a step by step example of you can load and display an image using the LEADTOOLS SDK:

https://www.leadtools.co...displaying-an-image.html

This is a Windows application tutorial that is written in both VB and C#, and is great if you are just starting to testing the toolkit's functionalities.

Once you have this done and working you would want to take a loot at our ColorReplaceCommand Class.

This command replaces the specified color by adjusting value of hue, saturation and brightness. The value of the Fuzziness property of the ColorReplaceCommandColor class determines the range around each color where the pixels will be changed according to Hue, Saturation and Brightness.
This command supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
This command does not support signed data images.
This command does not support 32-bit grayscale images

For more information, please take a look our Correcting Colors page.

How to use the ColorReplaceCommand in VB

Code:

Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load("PATH OF INPUT FILE") 
 
   ' Prepare the command 
   Dim command As ColorReplaceCommand = New ColorReplaceCommand 
   Dim Data() As ColorReplaceCommandColor 
   ReDim Data(0) 
   Data(0) = New ColorReplaceCommandColor 
   Data(0).Color = New RasterColor(200, 0, 35) 
   Data(0).Fuzziness = 300 
   command.Colors = Data 
   command.Hue = 9000 
   command.Saturation = 0 
   command.Brightness = 0
   ' Run the commands on loaded image
   command.Run(leadImage) 
   ' Save new image
   codecs.Save(leadImage, "PATH TO DESTINATION LOCATION", RasterImageFormat.Jpeg, 24)

Nick Villalobos
Developer Support Engineer
LEAD Technologies, Inc.


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Help with loading image and altering hue, saturation