The user interface of PhotoViz consists of five areas: List Bar for directories or menus, Display Area for image files, Quick Access icons, Photo Message and Status Bar (see Figure 2.1).
Figure 2.1: PhotoViz User Interface
Multiple images can be selected at the same time by pressing the control key and clicking the images with the mouse. When selected, the filename at the bottom of the image is highlighted. Multiple selected is useful for processing selected images in a directory, e.g. rotation, deletion or auto batch correction of selected images.
When an image is selected in PhotoViz, ImageViz will be launched (Figure 2.2). Like PhotoViz, the quick access icons are located at the bottom of the screen. ImageViz has several image specific icons like zoom, crop, next image, previous image etc. Users can view their images in the following ways:
Figure 2.2: ImageViz with Original Image (Left) and Auto Image (Right)
The current display size as a percentage of the original size is shown at the top of the ImageViz. Users can view the next or previous image using the forwardand backward arrows. This function is useful for previewing all the images in the directory. It is important to note that changes to the image are not saved until the user saves the image using the Save As icon . Therefore, all changes will lost when the user switches to another image or returns to PhotoViz.
Quick Access Icons provide an easy avenue for the user to access the commonly used functions. A list of icons and their respective functions is tabulated in Appendix A. These icons are designed to be visually self explanatory. When the mouse is placed over the quick access icons, text bubbles appear to help and guide the user.
The quick access icons are automatically enabled when the functions they represent are available to the user. Conversely, icons are automatically disabled when the respective function is not available.
Functions can also be quickly accessed by right-mouse click menus. Figure 2.3 to Figure 2.4 shows the different types of menus: List Bar menu (Figure 2.3), Image menu (Figure 2.5). These short-cut menus not only provide quick access to PhotoViz functions but they also allow users to manage image files and directories. Users can easily cut, copy, paste, create and rename files and directories.
Figure 2.3: Right mouse click quick access menu from List Bar
Figure 2.4: Right mouse click quick access menu in the Display Area
The Status Bar is located at the bottom of the user interface and comprises of two areas. On the left hand side is the instruction bar where simple tips and help are given. The right hand side shows the xy coordinates of the mouse cursor and the RGB (Red, Green and Blue) values at the current mouse location. For example,
x:695 y:485 RGB: (147,198,31)
means that the pixel at xy co-ordinate of (695,485) has a Red value of 147, Green value of 198 and a Blue value of 31. The maximum value of Red, Green and Blue is 255. The Status Bar is present in PhotoViz and ImageViz.