Allied Vision Technologies MF-145B2 Manuel d'instructions télécharger pdf (Page 72)

Controlling image capture

MARLIN Technical Manual

Page 64

9.8 Sequence mode

This mode enables certain image settings to be adjusted differently for every image, e.g. gain

and shutter can be changed on the fly by the host computer by writing into the gain and shutter

the host does not know (especially with external trigger) when the next image will arrive. In this

concept the host needs to take control over the timing and in deciding when to change a

setting.

Sequence mode is a concept where the camera holds a set of different image parameters for a

sequence of images. The parameter set is stored in the camera for each image to be recorded.

This sequence of parameter sets is simply called a sequence. The advantage is that the camera

can easily synchronize this parameter set with the images so that no uncertainty can occur.

Examples:

For a sequence of images, each image can be recorded with a different shutter or gain to obtain

different brightness effects.

The image area (AOI) of a sequence of images can automatically be modified, thus creating a

panning or sequential split screen effect.

The following registers can be modified to affect the individual steps of the sequence.

All modes

Cur_V_Mode, Cur_V_Format, ISO_Channel, ISO_Speed, Brightness,

White_Balance (color cameras only), Shutter, Gain, Lookup-

Table, TestImage

Fixed modes only

Cur_V_Frm_Rate

Format_7 only

Image_Position, Image_Size, Color_Coding_ID, Byte_Per_Packet

Table 32: Registers to be modified within a sequence

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 130 131

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Allied Vision Technologies MF-145B2 Manuel d'instructions Page 72