Pixel deviations

1 . A photometric imaging device, comprising:

a light source to illuminate a target area including a set of fiducials in accordance with different image viewing settings, wherein the different image viewing settings comprise different directions of the light source being emitted towards the set of fiducials;

an imaging device to capture images of the set of fiducials illuminated by the light source with the different image viewing settings;

a controller to:

control the light source to subsequently illuminate the set of fiducials with the different image viewing settings;

determine locations of the set of fiducials on images captured by the imaging device at the different image viewing settings;

calculate pixel deviations between the determined locations; and

determine offset data based at least in part on the pixel deviations.

2 . The photometric imaging device of claim 1 , wherein in a photometric imaging operation in the photometric imaging device, the controller is further to adjust a relative position of a lens of an imager of the imaging device based on the offset data.

3 . The photometric imaging device of claim 1 ,

wherein the locations of the set of fiducials on the images correspond to pixel coordinate pairs in a coordinate plane.

4 . The photometric imaging device of claim 1 , wherein the controller is further to store the determined offset data for use in a photometric imaging operation in the photometric imaging device.

5 . The photometric imaging device of claim 1 , further comprising a micro-actuator, wherein the controller is further to adjust a relative position of a lens of an imager of the imaging device utilizing the micro-actuator.

6 . The photometric imaging device of claim 3 , wherein the offset data comprises an adjustment to a relative position of a lens of an imager of the imaging device based on the pixel coordinate pairs.

7 . The photometric imaging device of claim 1 , wherein the controller is further to adjust a relative position of a lens of an imager of the imaging device when the pixel deviations are beyond a deviation threshold.

8 . The photometric imaging device of claim 1 , wherein the controller is further to execute a pixel shift image processing task on at least one of the images based on the offset data.

9 . The photometric imaging device of claim 1 , wherein the controller is further to execute a pixel shift image processing task on at least one of the images when the pixel deviations are beyond a deviation threshold.

10 . The photometric imaging device of claim 1 , wherein the set of fiducials includes at least one of a Secchi disk, a shape, a grid, a letter, or a pattern.

11 . The photometric imaging device of claim 1 , wherein the set of fiducials includes a first fiducial and a second fiducial, and wherein the controller is further to:

calculate pixel deviations between the locations of the first fiducial on the images;

calculate pixel deviations between the locations of the second fiducial on the images; and

wherein the controller is to determine the offset data based at least in part on the pixel deviations of the locations of the first fiducial and the second fiducial on the images.

12 . The photometric imaging device of claim 1 , wherein the offset data is determined by averaging the pixel deviations.

13 . The photometric imaging device of claim 1 , wherein averaging the pixel deviations comprises determining a weighted average based at least in part on the locations of the set of fiducials.

14 . The photometric imaging device of claim 1 , wherein the light source includes a first lamp element to illuminate the target area at a first image viewing setting at a first time and a second lamp element to illuminate the target area at a second image viewing setting at a second time.

15 . A photometric imaging system, comprising:

a plurality of lamps;

an imaging device to capture images of a fiducial illuminated by lamps from different relative locations;

a polarizer to provide a plurality of polarizer view states;

a controller to:

determine locations of the fiducial on the images, the images captured by the imaging device at the plurality of polarizer view states and illuminated by the lamps from the different relative locations;

calculate pixel deviations between the determined locations;

determine offset data based at least in part on the pixel deviations; and

store the determined offset data for use in a photometric imaging operation of a sample in the photometric imaging system.

16 . The photometric imaging system of claim 15 wherein the controller is further to apply a pixel shift correction to the photometric imaging system in parallel to the photometric imaging operation in which the sample is received on a target area of the photometric imaging system.

17 . The photometric imaging system of claim 15 , wherein the imaging device is to capture the images sequentially illuminated by the plurality of lamps at a plurality of polarizer viewing states, wherein for each polarizer viewing states, a first lamp illuminates the fiducial while a second lamp is turned off.

18 . The photometric imaging system of claim 15 , wherein the controller is further to execute a pixel shift image processing task on at least one of the images based on the offset data during an image capture operation executed by the photometric imaging system.

19 . A non-transitory computer-readable medium storing specific computer-executable instructions that, when executed by a processor of a computing device, cause the computing device to at least:

capture, by an imaging device, images including a set of fiducials illuminated by a light source under a plurality of image viewing settings, wherein the plurality of image viewing settings includes illumination from the light source from different directions;

determine locations of the set of fiducials on the images;

calculate pixel deviations between the locations of the set of fiducials on the images; and

determine offset data based at least in part on the pixel deviations.

20 . The non-transitory computer-readable medium of claim 19 , wherein the specific computer-executable instructions further cause the computing device to: for each of a plurality of polarizer view states, determine the offset data and calibrate, in a photometric imaging operation, a relative position of a lens of the imaging device based on the offset data.