Automatic Detection; Manual Configuration; Shading Correction - JAI GO-5101M-PMCL User Manual

■ Automatic detection

Automatic detection can only detect lit defective pixels (i.e., white blemishes).
1
Shield the camera sensor.
If a lens is attached, use the lens cap as a shield, for example.
2
Configure the threshold level for defective pixel detection.
Specify the threshold value for the blemishes to be detected using the [JAI Custom Control
Blemish] - [Blemish Detect Threshold] setting.
The threshold value is specified as a percentage.
The default setting is "10" with 10% of the full scale (100%) specified as the threshold value.
3
Execute [Blemish Detect] to start automatic detection.
After detection, the interpolation data is saved to the camera's internal memory.
To check the number of interpolated pixels after automatic detection
You can check the number of pixels interpolated via automatic detection by loading the BlemishNum
data.

■ Manual configuration

1
Select the index in [Blemish Detect Position Index].
You can select from 0 to 511. However, configure the indexes in order starting with the smallest
index. If you skip indexes while configuring settings, interpolation may not be performed.
2
Specify the pixel points for interpolation using the [Blemish Detect Position X] and [Blemish
Detect Position Y] settings.
Each point is saved to the camera's internal memory as you configure them.
You can configure values that are within the total effective pixel area. Specify pixels for which
interpolation is not necessary as -1. If 0 is specified, the first line or first pixel will be interpolated.
3
Set [Blemish Enable] to [True], and execute interpolation.
If [False] is specified, defective pixel interpolation is disabled.

Shading Correction

The shading correction is a function that corrects non-uniformity (i.e., shading) in the amount of light
generated by the lens and lighting equipment. Using this function allows correction even if top, bottom,
left, and right shading is not symmetrical in relation to the center of the screen (H, V).
The size of the correction block is 20 (H) × 17 (V) blocks and calculation errors in the correction data
are minimized due to the small interpolation block. Each block is 128 × 128 pixels.
The total size of the blocks is 2560 (H) × 2176 (V), but the actual number of effective pixels for the
camera is 2464 (H) × 2056 (V). The ineffective peripheral areas will be deleted internally on the camera
automatically.
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GO-5101M-PMCL / GO-5101C-PMCL