Dynamic generation of test images for ambient light testing

Abstract

In a remote access environment that includes a server, a client device may remotely access, e.g., medical images from the server and may be provided with a mechanism to retrieve a test image, such as the TG-18 CT or TG-18 MP sample test patterns. The client device communicates display size information to the server, which generates the test image on-the-fly for the particular display size of the client device. For example, components in the test image and borders may be scaled to create an appropriate test image for any client device.

What is claimed: 
     
         1 . A method of dynamically generating a test image for a client device from a standard test image on a server, the standard test image having components therein and a border defined by a horizontal margin and a vertical margin, the method comprising:
 receiving, at the server, display dimensions from the client device;   determining if a minimum dimension of the display dimensions is less than a first predetermined value;
 if the minimum dimension is less than the first predetermined value, then reducing a size of the components by a factor of the minimum dimension divided by the predetermined value for rendering the test image for display at the client device; and 
 if the minimum dimension is not less than the first predetermined value, then determining if the minimum dimension is less than or equal to a second predetermined value;
 if the minimum dimension is less than or equal to the second predetermined value then adjusting at least one of the vertical margin and the horizontal margin to maintain an array of boxes in a centered position with respect to the test image for rendering the test image for display at the client device; and 
 if the minimum dimension is not less than or equal to the second predetermined value then increasing a size of the components by a factor of the minimum dimension divided by the second predetermined value for rendering the test image for display at the client device. 
 
   
     
     
         2 . The method of  claim 1 , wherein the first predetermined value is a minimum value determined in accordance with a box size and spacing between each box in the test image, the box sizes and the spacing being determined in accordance with default values defined by a TG-18 CT test image. 
     
     
         3 . The method of  claim 1 , further comprising rotating the testing image in accordance with an orientation of a display of the client device. 
     
     
         4 . The method of  claim 1 , further comprising, if the minimum dimension is less than the first predetermined value, then reducing a box size, a spacing between boxes, a corner box size, and a circle diameter. 
     
     
         5 . The method  claim 4 , wherein the reducing is performed by multiplying the minimum dimension by the first predetermined value. 
     
     
         6 . The method of  claim 1 , further comprising if the minimum dimension is between the first predetermined value and the second predetermined value, then vertical and/or horizontal margins are adjusted to maintain the test image in a center position. 
     
     
         7 . The method of  claim 1 , further comprising if the minimum dimension is greater than the second predetermined value, then a box size, a spacing between boxes, a corner box size and a circle diameter multiplied by a factor. 
     
     
         8 . The method of  claim 7 , wherein the factor is determined by dividing the minimum dimension divided by the second predetermined value. 
     
     
         9 . The method of  claim 1 , further comprising exposing a web API at the server that is called by the client device. 
     
     
         10 . The method of  claim 1 , wherein the server receives display area information from the client device in a state model. 
     
     
         11 . The method of clam  1 , wherein the first predetermined value is 663 pixels, and wherein the second predetermined value is 1024 pixels. 
     
     
         12 . The method of  claim 1 , wherein the test image is a TG-18 CT test image.