Basic Tkinter

Support

Required licenses

EasyImage

Recommended images

Any image

Location

Python: […]C:\Users\Public\Documents\Euresys\Open eVision 24.10\Sample Programs
\Python samples\Tkinter samples\basic

Python

C:\Users\Public\Documents\Euresys\Open eVision 24.10\Sample Programs\Python samples\Tkinter samples\basic

  These links work only if you installed the sample programs in the default folder together with Open eVision.

Purpose

This sample program demonstrates how to:

□ Perform and rotate and scale an image.
□ Display the image using the Tkinter GUI framework.

The process steps are:

□ Load an image.
□ Convert the image from RGB to BGR.
□ Scale and rotate the image.
□ Display the image.

Code highlights

This is not supposed to be a Tkinter tutorial.

1. Load an image. 
import open_evision as oev

image_rgb = oev.EImageC24()
image_rgb.Load("path/to/your/image")
2. Rotate the image.

The image must be converted from RGB to BGR to be properly displayed with Tkinter.

image_rgb = oev.EImageC24(image_rgb.Width, image_rgb.Height)

oev.EasyColor.ConvertRGBImageToBGR(self.image_rgb, self.image_bgr)
3. Scale and rotate the image. 
image_scaled_rotated = oev.EImageC24(image_rgb.Width, image_rgb.Height)

oev.EasyImage.ScaleRotate(image_bgr, image_bgr.Width / 2, image_bgr.Height / 2, image_bgr.Width / 2, image_bgr.Height / 2, scale, scale, oev.Easy.FromDegrees(rotation), image_scaled_rotated, 4)
4. Display the image.

Consider reading carefully the note concerning the lifetime of Tkinter variables in the source code of the sample as well as the Tkinter documentation (https://docs.python.org/3/library/tkinter.html#images).