Pulnix TMC-6700 Series Manuale delle Istruzioni Scaricare il pdf (Pagina 26)

Page 18

Operation

TMC-6700/1000 Series Progressive Scan CCD Digital Color Camera

The mathematical transformation is a linear-space 3 x 3 matrix operation, as shown below.

The coefficients have been optimized for the spectral sensitivities of a Bayer CFA (color filter array).

For camera systems, a linear-space color correction matrix is used. The coefficients are programmable

through the serial interface.

3.3.4 User-Programmable Functions

3.3.4 (a) Edge Enhancement (Sharpness)

Edge enhancement is set by RS-232 control. Horizontal, vertical, and both H and V enhancement are

selectable. The DSP mathematically manipulates the horizontal and vertical edge information to

sharpen the image. The intensity of the enhancement can be set by Edge Enhancement Level.

3.3.4 (b) Gamma Selection

You can toggle between 0.45 (default) and 1.0 (linear output) by either the switch on the rear panel or

RS-232 control.

3.3.4 (c) Shutter Selection

The TMC-6700/1000 series provides manual shutter and asynchronous shutter with external trigger

(VINIT). Each mode is selectable up to 1/16,000 sec. By selecting the shutter dial setting (0 to 9), the

preset shutter duration is loaded from RAM.

The TMC-6700/1000 series also supports Direct shutter mode. In Direct shutter mode, the user can

control any exposed line count within the shutter time range.

3.3.4 (d) RGB to YCrCb Conversion

The TMC-6700/1000 series can output three different digital video outputs, 24-bit RGB, 24-bit 4:4:4

YCrCb, and 16-bit 4:2:2 YCrCb. Output can be selected by software interface only.

YCrCb conversion is expressed in the following formula:

Y = 0.257R + 0.504G + 0.098B + 16

Cr = 0.439R + 0.368G - 0.071B + 128

Cb = -0.148R - 0.291G + 0.439B + 128

3.3.4 (e) User Parameter Saving and Loading

User parameters can be stored in EEPROM. However, the user has no direct read/write access to the

EEPROM. RS-232 software permits read/write of the parameters to RAM. Four RAM banks are

available; if the user needs to save the data permanently into EEPROM, then all of the data in the four

1.75 0.25–0.5–

0.1875– 1.3125 0.125–

0.125–0.5– 1.625–

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Pulnix TMC-6700 Series Manuale delle Istruzioni Pagina 26