Basler Vision Technologies Sprint Series, Руководство пользователя

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Features
Basler sprint Mono Cameras 133
6.4.1 Test Image One (Fixed Gradient)
When the camera is set for an 8 bit output mode, test image one is formed with an odd/even gray
scale gradient that ranges from 0 to 255 and repeats every 512 pixels as shown in Figure 43. The
odd pixel gradient starts at 0 and steps up, that is, the gray value of pixel 1 is 0, the gray value of
pixel 3 is 1, the gray value of pixel 5 is 2, and so forth. The even gradient starts at 255 and steps
down, that is, the gray value of pixel 2 is 255, the gray value of pixel 4 is 254, the gray value of pixel
6 is 253, and so forth.
At pixels 256 and 257, the gray value for both pixels is 128. At pixels 511 and 512, a white odd pixel
is next to a black even pixel. At pixels 513 and 514, a black odd pixel is next to a white even pixel.
To the human eye, the gradient appears to be a varying gray field with a white vertical line every
512 pixels.
Test image one is useful for checking the integrity of the data transmitted by the camera. If you
capture lines and examine the pixel values in the captured lines, the values should be exactly as
described above.
Fig. 43: Formation of Test Image One on a Camera with 4096 Pixels Per Line
Fig. 44: Test Image One
Note
When the camera is set for an 8 bit output mode, the pixel values in test image
one range from 0 to 255 as described above.
If the camera is set for 10 bit output, the pixel values will range from 0 to 1023.
If the camera is set for 12 bit output, the pixel values will range from 0 to 4095.