User manual

4.4.
Software Operation
Once the address has been entered the Web browser starts to load pages from the VP-792 mirroring
the menu system of the unit. All menu items are shown as their respective buttons, sliders and list
boxes and can be accessed and altered with the PC mouse or corresponding navigational key presses.
Note:- When changes within a submenu make other menu items available immediately when using the
on-screen menu of the VP-792 this has to be either done manually by clicking on the refresh button of
the Web browser or is done with the next periodic auto refresh.
Values are set by sliders. For fine increment of a slider value click on the slider and use the mouse
wheel to change the value in steps of 1. Click again and the value is applied.
4.5.
File Upload
A page for file uploads is provided.
Test patterns can be created and stored on the PC. Four such custom test patterns can be uploaded to
and stored by the VP-792 unit. Each of the test patterns in the four slots can be deleted and replaced by
another test pattern.
The test patterns needs to be in RGB 24bit .PNG format as supported by MS Paint®. For best detail the
test patterns should be created with the output resolution VP-792 will be operated at. Non matching
resolution test patterns will be scaled to the output resolution.
A single alpha map can be uploaded to the VP-792 unit.
The alpha map format is B/W 16bit .PNG as supported by Adobe Paintshop®. Only the most significant
10 bits are used.
Also a Kramer proprietary format without compression is supported. This format is intended for uploads
in proprietary calibration systems directly controlling the VP-792 unit. Thus a .PNG encoder does not
have to be implemented on the host side. If the alpha map size exceeds the available storage space on
the VP-792 unit the .PNG (lossless compression) has to be used.
// Custom Alpha Map File Format
//
// Offset Size Purpose
// 00 4 Header field used to identify custom alpha map file ('AM30')
// 04 2 Horizontal resolution in pixels (big endian)
// 06 2 Vertical resolution in pixels (big endian)
// 08 s Image data
//
// Each line of image data is built like this:
// One 32-bit unsigned (four bytes, big endian) for every three pixels of image data
// Bits[31..30] - unused
// Bits[20..20] - leftmost pixel of three
// Bits[19..10] - middle pixel of three
// Bits[09..00] - rightmost pixel of three
// Each line has to be zero-padded to make up an integer number of 32-bit unsigned values
//
// e.g. 1280 pixels horizontally needs 427 values (1024/3 = 426.67, rounded up)
//
// So the size (s) of the image data is calculated like this:
// s = CEILING(ImageWidth /3 ) * 4 * ImageHeight
//
// Example of a 1920x1200 custom alpha map (all alpha values set to 1):
//
// 000000 41 4D 33 30 07 80 04 B0 (header)