Magnifying the Image

Mira Pro x64 provides screen image magnifications in the range of 16x to 1/1024x. Magnifying changes the mapping of 1 image pixel to 1 screen pixel. All magnification values are powers of 2, so that no pixel interpolation occurs and you always see actual image pixels. For example, using a magnification of4 maps 1 image pixel into 4 screen pixels whereas using a magnification of1/8 maps 4 image pixels to 1 screen pixel. For extremely large images, using the maximum de-magnification option of 1/1024 can be used to fully display an image 1 million pixels wide in a 1000 pixel screen width.

Screen magnification is purely a view effect as no changes are made to the actual pixel data. To change the image size or scale requires interpolating the image using one of several Image Geometry Commands, such as Scale Image and Affine Transformation commands.

Magnifying the Image about a Target Point

These methods use the (magnify) button on the Image Bar to magnify the image at the location of the pointer. This keeps the image centered at the location of the mouse pointer provided the image fills the window. However, if the image is smaller than the window, the center position will be changed.

Using the Magnify Button

This method is available only when the Image Bar is open in the Image Window. If you hover the mouse over the button, a tooltip will open showing the current magnification. To change the magnification, use the procedure below:

1. Click on the Image Bar to enter "magnify mode". Then:

2. Point the mouse at the new center of magnification. Then

3. To Enlarge: Click the left button.

4. To Shrink: Hold down the [Shift] key and click the left mouse button.

5. To leave magnify mode, enter another mode. For example, click on the Image Bar to switch to Roam Mode in which no mouse command modes are active.

Using the Mouse Thumb Wheel

This method requires a mouse having a thumb wheel or a mouse pad having thumb wheel emulation.

1. In any command mode, point the mouse at the image where you want to center the magnification or demagnification.

2. To Enlarge: Rotate the thumb wheel forward.

3. To Shrink: Rotate the thumb wheel backward.

Magnifying Relative to the Window Corner

The following methods magnify the image relative to the Image Window so that magnifying the image shifts it relative to the top left corner. In general, this changes the centering in the window.

Using the Magnify Menus

This method is available only when the Image Bar is open in the Image Window.

View Menu for Image Windows

1. On the menu at the top of the Mira application window, click the View > Magnify command to open a menu similar to the one above..

2. Select the magnification from the menu.

Magnify Menu of Image Context menu

1. Right click on the image to open the Image Context Menu.

2. Select the Magnify menu,

3. Select the magnification setting from the menu.

Related Topics

Image Windows

Image Bar

Mira Pro x64 User's Guide, Copyright Ⓒ 2023 Mirametrics, Inc. All Rights Reserved.