Display

The display options allow to customize the rendering of the images and the vector drawings. The entire image (thumbnail) is visible at the top left corner of the main image. Dragging the rectangle over the thumbnail allows navigating through the image. Another way of moving the image is to select the hand in the toolbar or to keep pressed the space bar for dragging the image.

The slider enables to set a custom zoom factor for the main image. When the "resize to best fit" button is pressed, the whole image is adjusted inside the window. The "actual pixel size" button displays the image at 100%. For getting an optimal speed of vector graphics and image display, it is recommend to set the zoom at 100%.

The check boxes allow displaying or hiding the image, the thumbnail, the lens, the scale and all the vector drawings produced by the different Tools.

Note: Only the drawings which are checked are loaded in the Data Viewer and involved in the object classification.

Note: Using the mouse wheel on the main image changes the zoom factor.

Display preferences

For best performance, select the nearest neighbor interpolation, set the drawing opacity to 100% and do not check the antialiasing button. In addition, the "fill drawing" option in Object Extraction must be unchecked (only the outlines are displayed) to improve the rendering performance.

Background color: Set the background color of the main window.

Interpolation is a process of generating the value of a pixel based on its neighbors to increase or to decrease the number of pixels in a digital image.

The Nearest neighbor interpolation is the simplest method. Basically, it extends the pixel value.
The Bilinear Interpolation determines the value of a new pixel based on a weighted average of the 4 pixels in the nearest neighborhood of the pixel. The averaging has an anti-aliasing effect and therefore produces relatively smooth edges.
The Bicubic and bicubic 2 interpolations are more sophisticated (slower rendering) and produce smoother edges than the bilinear interpolation. A new pixel is the result of a bicubic function using 16 pixels in the nearest neighborhood of the pixel.

Handle size (pixel): Set the size of the handles of the selected drawings.

Move the image if drawing hitting a border: Moves automatically the image when drawing or moving vector graphics near a border.

Antialiasing for drawings and text: Draws vector drawings and text (only on the image) with antialiasing.

Drawings Opacity: Select the percentage of the drawings opacity (when the value is less than 100, the rendering can be slower).

Note: To show the preferences, open the Project Preferences window , select Display or the submenu Thumbnail.