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Shading Correction - Sharp IV-S30 User Manual

Compact image sensor camera function and operation
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Table of Contents
Setting Measurement Conditions

(1) Shading correction

This process removes unevenness from images that have gray level unevenness caused by an
illumination.
When "CAM1&2" is selected for SELECT CAMERA line.
[TYPE MEAS COND]
OBJECT TYPE NO.
SELECT CAMERA CAM1&2 CAM1&NG-IMG
3
IMG PRE-PROCESS (TO NEXT SUB-MENU)
[IMG PRE-PROCESS]
ADJ.IMG GRAY
OMPARE IMGS
OPS-MENU RETURN LOCK
When "CAM1&NG-IMG" is selected for SELECT CAMERA line.
[TYPE MEAS COND]
1OBJECT TYPE NO.
2SELECT CAMERA CAM1&2 CAM1&NG-IMG
3IMG PRE-PROCESS (TO NEXT SUB-MENU)
[IMG PRE-PROCESS]
1ADJ.IMG GRAY
2
3 OMPARE IMGS
OPS-MENU RETURN LOCK
[ ADJ.IMG GRAY ]
1ADJ.MODE
2ADJ.AREA
3SET STD.GRAY LVL MOVE UP.L(224,208) LO.R(287,271) GRAY(000)
OPS-MENU RETURN LOCK
- The items displayed in lines 2 and 3 will vary, depending on the selection in item 1.
Selection in item1
DIVIDING
SUBTRACTING
FILTERING
Correction mode
DIVIDING
SUBTRACTING
FILTERING
00(0~63) NO YES
CAM1(1~2) NO YES (TO NEXT SUB-MENU)
CAM1(1~2) NO YES (TO NEXT SUB-MENU)
NO CAM1 CAM2 CAM1&2 (TO NEXT SUB-MENU)
00(0~63) NO YES
CAM1 NO YES (TO NEXT SUB-MENU)
CAM1 NO YES (TO NEXT SUB-MENU)
NO CAM1 (TO NEXT SUB-MENU)
DIVIDING SUBTRACTING FILTERING
MOVE UP.L(224,208) LO.R(287,271) REG DISP
Data displayed in item2
MOVE UP.L(224,208) LO.R(287,271) REG DISP
MOVE UP.L(224,208) LO.R(287,271) REG DISP
MOVE UP.L(224,208) LO.R(287,271)
Divide a scanned image with the reference image that expresses changes of dark and bright as a
whole, and correct the brightness throughout the image.
(Each gray level of scanned image) X reference gray level} / (Each gray level of reference image)
- Divide a scanned image that is shot under the uneven light by a blank image that is shot under the
same light condition, you can change the image to the one that is shot under the even light.
Subtract a scanned image with the reference image that expresses changes of dark and bright as a
whole, and correct the brightness throughout the image.
(Each gray level of scanned image) + reference gray level} - (Each gray level of reference image)
- Subtract a scanned image that is shot under the uneven light by a blank image that is shot under
the same light condition, you can change the image to the one that is shot under the even light.
Filter a scanned image with the maximum value, and then with an average value, to make a
brightness image.
[Max. value filter: Max. gray level of 3 x 3]
- [Average value filter: Average gray level of 3 x 3]
- Use this filter when a brightness distribution image (reference image) for the scanned image
cannot be obtained.
1. Select "CAM1" or "CAM2" using the
up and down keys.
2. Move the cursor to "YES" and press
the SET key.
3. Move the cursor to "TO NEXT SUB-
MENU" and press the SET key.
- The "ADJ. IMG GRAY" menu will
appear.
1. Select "YES" and press the SET key.
2. Select "TO NEXT SUB-MENU" and
press the SET key. - [ADJ.IMG
GRAY (shading correction)] menu
appears.
(NOTE)
First set the reference gray level in item
3, and then finish the setting in item 2.
Data displayed in item3
MOVE UP.L(224,208) LO.R(287,271) GRAY(000)
MOVE UP.L(224,208) LO.R(287,271) GRAY(000)
Details
3-18

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