8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 87
Figure 8-34 Gray gradient test image
SlantLineMoving
In the moving diagonal gray gradient test image, the first pixel value of adjacent row in each frame
increases by 1, until the last row. When the pixel gray value increases to 255, the next pixel gray value
returns to 0. The first pixel gray value of adjacent column increases by 1, until the last column. When the
pixel gray value increases to 255, the next pixel gray value returns to 0.
In the moving diagonal gray gradient test image, in the adjacent frame, the first pixel gray value of the next
frame increases by 1 compared to the previous frame. So, in the dynamic image, the image is scrolling to
the left. A printscreen of the moving diagonal gray gradient test image is shown in Figure 8-35:
Image rolling direction
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Figure 8-35 Moving diagonal gray gradient test image
SlantLine
In the static diagonal gray gradient test image, the first pixel gray value is 0, the first pixel gray value of
adjacent row increases by 1, until the last row. When the pixel gray value increases to 255, the next pixel
gray value returns to 0. The first pixel gray value of adjacent column increases by 1, until the last column.
When the pixel gray value increases to 255, the next pixel gray value returns to 0.
Compared to the moving diagonal gray gradient test image, in the adjacent image of the static diagonal
gray gradient test image, the gray value in the same position remains unchanged. A printscreen of the
static diagonal gray gradient test image is shown in Figure 8-36.
