Image Manager

This dialog allows you to load images, manage the display order, set the image colour (for black and white images) and unload images.



Click on the Image Manager toolbar button to display the Image Manager.

Add Image
This button will prompt for an image file and will load it into the image display list.

Delete Image
This button will remove the selected image from the image list (unload it).

Reset Orientation
This will erase the selected image orientation.

Image Orientation
To orient the image to the job, use the Menu option Image/Orient to Image.

Save Image Orientation
This option will write the image orientation for the selected images to an ESRI compatible Georeferencing file. See the bottom of this topic for more info.




Display Order
Select an image in the list and press the ^ v keys on the left side to move the image up or down the display order. Image are displayed from top to bottom, so the last image will appear 'on top'.

If you cannot see an image 'underneath' another one, you can change the transparency value of the top image so you can see the one underneath.

Turn Image On/Off
Click on the tick box to the roght of the image name in the image list to turn the image display on or off.

Image Colour
Click on the colour bar on the image list or click on the 'Set Colour' button to select the colour for an image. This can only be done for 'black and white' images.

Transparency
The slider displays and changes the selected image.
Move towards 100% to make the image more transparent so you can see the images 'underneath'.

ESRI Georeferencing File
The filename will be based on the image filename and the file will be saved in the same folder as the image file.
Thus if the image file is 'C:\data\test\1117750_small.jpg', the georeferencing file will be created as 'C:\data\test\1117750_small.jgw'.

The contents of the world file will look similar to this:

20.17541308822119
0.00000000000000
0.00000000000000
-20.17541308822119
424178.11472601280548
4313415.90726399607956

When this file is present, ESRI ArcView performs the image-to-world transformation. The image-to-world
transformation is a six-parameter affine transformation in the form of

x1 = Ax + By + C
y1 = Dx + Ey + F