15.4. View Modes¶
The viewer allows you to zoom and pan the frame: the mouse wheel is used for zooming and the middle button or the Pan tool allow you to drag the image.
The drop-down list on the toolbar at the bottom of the viewer displays the current scale and allows you to change it.
The following controls are also available on this toolbar:
- A button and a drop-down list for selecting a mode for comparing media files (see the “Comparing Media Files” section).
- A drop-down list with a choice of display modes: standard, 360° video (see the “360° video” section), and stereo image (see the “Stereo Image Modes” section).
- A button for activating and adjusting the color correction (see the “Color Correction” section).
- A drop-down list with a choice of aspect ratios in the Cache mode (see the “Image Aspect Ratio” section).
- A button that allows you to show/hide sketches and comment labels (see the “Creating sketches” section).
- A button for switching to full screen mode. You can also switch to the full screen mode by pressing the F shortcut or double-clicking on the viewer window. Return to the standard mode by double-clicking or by using the F and Esc shortcuts.
15.4.1. Comparing Media Files¶
By default, when the Compare button is off, the toolbar in the viewer shows version A of the current media file; this is the basic playback mode. In addition, you can compare two images.
You can activate the comparison of two versions of a media file (A and B), or compare frames within the same version (in this case, a marker on the timeline is used).
In both cases, there are three options for comparing images:
- horizontal layout of frames;
- vertical layout of frames;
- a comparison in the Wipe mode, when frames superimpose on one another, and the viewer displays a vertical shutter; you can move the shutter using the mouse to perform pixel comparison of images.
While in version comparison mode, you can specify versions A and B in the playlist or by using the drop-down lists at the bottom of the timeline. In addition, you can quickly swap the versions by clicking the button to the left of the timeline.
Using the drop-down lists for versions A and B on the timeline, you can not only select the versions to be compared from the playlist, but also upload a new file as another version (similar to the version adding button on the Lista panel; see the “Playlist” section).
When comparing, you can use the marker to mark one of the frames on the timeline, and that frame will be fixed and displayed together with the current frame under the cursor. There is a button above the timeline that allows you to swap frames marked with the cursor and the marker.
You can also tie the marker and the cursor together; the cursor and the marker will move simultaneously when the frame is changed.
15.4.2. Image Aspect Ratio¶
You can specify the aspect ratio for media files using the buttons located next to each item in the playlist window.
You can select the desired aspect ratio from the drop-down list. The Auto option will leave the original aspect ratio of the frame, and other options will stretch the image to ensure the desired proportions.
In the Cacher mode, you can adjust the image aspect ratio by cropping the edges of the image at the top/bottom or on each side. You can do this using the corresponding button on the toolbar at the bottom of the viewer.
The required aspect ratio is also selected from the drop-down list.
15.4.3. 360° video¶
You can view a panoramic image or movie in the 360° Video mode; first, you need to download it as a regular media file, then switch to the 360 View mode using the drop-down list on the toolbar at the bottom of the viewer.
This mode allows you to play video and control the gaze direction using the Pan tool.
To return to the regular mode, select Regular Mode in the same drop-down list.
15.4.4. Stereo Image Modes¶
Mirada supports graphics and video files containing stereo images.
In this case, the image in the file should consist of two horizontal frames (for the left and right eyes) and, during further processing, Mirada considers the corresponding parts of the frame as stand-alone images and combines them in a certain way to create a stereo image.
To switch to the stereo image mode, select the desired option from the drop-down list on the toolbar at the bottom of the viewer: 3D Anaglyph or 3D Vision Glasses.
The following two methods for creating stereo images are supported.
- Anaglyph Image is a mode to create stereo images by independent color coding of the frames intended for the left eye and the right eye (this mode corresponds to the 3D Anaglyph option in the drop-down list). You will need special glasses with red-cyan color filters to view graphics and video files in this mode.
- OpenGL – Quad Buffer Mode corresponds to the 3D Vision Glasses option in the drop-down list. This mode involves the use of stereoscopic visualization technology based on shutter glasses and quick alternation of frames for the left and right eyes. This technology is supported at the hardware level by professional video cards (nVidia Quadro and other comparable video cards).
15.4.5. Color Correction¶
Mirada supports color correction of the image in the uploaded media file. Commands from the drop-down list on the toolbar at the bottom of the viewer or shortcuts can be used to control the color correction.
- On/Off (G shortcut) allows you to enable/disable the color correction mode.
- Settings… (Alt+G shortcut) allows you to enable the color correction mode and display its property window.
You can set the following parameters in the property window in the interactive mode:
- Gamma (the default value is 1.00). This parameter mostly affects the middle tones of the image — when you increase the value, the image becomes lighter, and vice versa.
- Exposure (the default value is 1.00). This parameter mostly affects the light tones of the image — when you increase the value, the image becomes lighter, and vice versa.
- Exposure (the default value is 0.00). This parameter mostly affects the dark tones of the image — when you increase the value, the image becomes lighter, and vice versa.
Mirada supports color correction of images with a large color depth (more than 8 bits per color channel).
15.4.6. Duplicate Viewer¶
In the Media section of the main menu, the functions of the controls that are located on the playback panel are basically duplicated. The Duplicate viewport command is also available here; this command opens another viewer for the media file and allows you, for example, to use a second monitor or projector.