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- DAQ > Image Capture Motion Setup (Figure 1)
Figure 1. Image Scan Setup window
- Instruments > Camera: General Setup (Figure 2)
Figure 2. General Camera Setup window
- Instruments > Camera: JAI Camera Setup (Figure 3)
Figure 3. General Camera Setup fixed Settings
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1. First open the IMS Application 'SHIL' on the desktop (Figure 4).
Figure 4. SHIL IMS Desktop icon
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3. After successful initialization, two windows will appear: The IMS Control Panel on the left and the measurement window along the top of the screen (Figure 5)
Figure 5. Main SHIL user interface window
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1.Go to Instruments > Camera: General Setup (Figure 6). The JAI Camera Setup Parameters window will appear (Figure 7).
Figure 6. Select JAI Camera Setup Parameters window
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- Stripe Width: Centered in the middle of the core, this determines the width across the core that will be used to calculate RGB data. This is typically set to 2cm. While the value can be changed higher or lower it is commonly at 2 cm. The advantage is this width provides enough material to not exaggerate small disturbances but rather provides RGB data representative of the bulk lithology.
- Decimate Interval: The interval that sets the recorded offset along the length of the core. This value can be set between 1 - 2.9 cm
- Mean or Midpoint: Can choose how RGB is calculated for the interval. Interval mean calculates the mean RGB values over the interval. Interval Midpoint uses the RGB value at the center of the interval. This is typically set to Interval Mean.
Figure 7. JAI Camera Setup Parameters window
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1.Go to DAQ > Image Capture Motion Setup (Figure 8).
Figure 8. Select Image Scan Setup window
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2.The SHIL Section Information window will pop up.
Figure 9. Select SHIL Section Information window
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By default the instrument is set for imaging the archive half and will not allow you to scan a working label. If you want to take a picture of a working half you need to go to the MANUAL tab and select W (working) into the Section Half label (Figure 10). Once you have selected W (working), you will not be able to scan an archive half; in order to do that you need to go back into the MANUAL tab and re-select A (archive).
Figure 10. SHIL MANUAL Section Information window
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10. The 'Image CROP' window will go away and the 'SHIL Section Information' window will appear again.
Figure 11. Image CROP window
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- Open up MUT (Figure 12). Use LIMS Applications password to login. The LIMS Uploader window will open (Figure 13).
Figure 12. Desktop MUT icon
2. Set 'Project' at the bottom of the screen to either the current expedition or '999' if performing tests.
Figure 13. LIMS Uploader window
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In MUT the 'active analyses' (Figure 14) should be set to Linescan Image, Processed RGB channels, and Whole-round Linescan. Linescan Image and Processed RGB Channels are for section half measurements. The Whole-Round Linescan Image is for 360 Imaging of hard rock cores. All three analyses should be set in the 'Active Uploaders' Column. Note it is ok for analyses to be in the 'Active Uploaders' even if MUT at that instrument host does not generate those files.
Figure 14. Select Set active analyses on MUT
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VCD-S: The SHIL can preserve a digital copy of the VCD-S that is printed out. If a scientist wants to keep a digital copy of the scratch sheet turn on the feature in Instruments > Camera: VCDS Setup (Figure 15) . Files are then written to C: data > in > VCD-S. These files are not uploaded to LIMS and should be put in data1 at the end of the expedition. The files can be put on the server for scientist access to a convenient, shared location such as Uservol.
Figure 15. Select to preserve a digital copy of VCD-S
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2. Place the split liner section with the whole round core on the tray below the SHIL and align the top with the 0 cm on the ruler on the tray (Figure 16).
Figure 16. Whole round core correctly placed on the split liner section.
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4. Attach the not 0° aluminum strip and rotate the tray so that the 0° position is up, facing the camera (Figure 17).
Figure 17. Whole round core correctly placed on the aluminum tray
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3. Select the 360 Imaging on Image Type and the default quadrant will be 0 Degrees. Select Dry-Hard Rock. Click TAKE A PICTURE
Figure 18. SHIL Section Information window for 360 Hard Rock Imaging
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Safety Concerns
- These lights can get hot and can burn surfaces if left stationary and on for over 20 secs. This is not an issue during normal imaging operations and will not heat the core surface. if the cooling fans are not used. The temperature is shown on the read out above the camera and maintained at a temperature of 30 deg C. Imaging a section will cause the temperature to range between 30 and 35 deg C. If Temperature goes about 50 deg C an alarm will sound. Notify a technician if that happens. Caution is needed when technicians perform the calibration process. Here, the lights are stationary and you must be conscious of the length temperature of time the lights are on. Keep them at 35 deg C or below. You can use the manual power switch to turn the lights on and off or the buttons in the software. Use the heat resistant grey silicone mat for the shading and pixel corrections. Do not use the plastic Gray card.
- Never look at the LEDs directly. Even the reflected light can be painful. When working under the track make sure that the power is off.NOTE: if you are concerned with the heat dissipation, you can use our FLIR cameras to confirm that the temperature is ok.
Glossary of terms:
Gain: a digital camera setting that controls the amplification of the signal from the camera sensor. It should be noted that this amplifies the whole signal, including any associated background noise.
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- Note which version of standard you are using. Each color standard values vary based on the version and the manufacturer of the standard. It is recommended to use the X-Rite Colorchecker for the calibration. White is 243, Black is 15 (confirm that number) (Figure 21 add) . For our QP 101 v4 card, the RGB values are 235, 111, and 80 (Figure 21). All SHIL calibration standards are found in drawer PP-2B.
- Obtain the 3D standard (Figure 20), the gray silicone mat standardand the lens cap from PP-2B.
- Set camera fF/ stop to 22 16. (Figure 22). F/22 is /22 was suggested by the camera manufacturer as the preferred for standard scanning with the current light set up; however we have found F/16 provides a good calibration image. Thus F/16 is also acceptable. For hard rock cruises, where 360° whole round scanning is required, a larger F/stop number is required. (Note for imaging specialist - what F/Stop do you use and why?)
- If you haven’t set the camera’s height, now is the time to do so! See the section Camera Height Adjustment at the end of the calibration section.
Figure 20: 3D standard with MacBeth Color standard.
Figure 21: QP card 101 v4 grey scale standard.
Figure 22: Setting the F Stop on the Camera.
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3. Compare the current scan rate (Speed) to the requested rate. The Speed (Figure 23) of the camera will be in the first box. If the values need to be changed to match the requested values by the science party, please proceed to the calibration section below as you will need to do a full calibration. If the values match, close the ‘Image Scan Setup’ window and proceed with the following checks.
Figure 23: Checking the Image Scan Speed.
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5. Again, if the values need to be changed to match the requested values by the science party, please proceed to the calibration section below. If the values match, close the JAI Camera Set-up window and proceed.
Figure 24: Checking the Max Image Scan Speed.
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1. Place the 3D calibration standard on track as shown (Figure 25). The color squares must be oriented as pictured below, butted against the red reflection bar.
Figure 25: Color standard in track in correct orientation.
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5. When the image has finished click Crop and then Save. We use the uncropped image so the crop here is not important.
Figure 26: a) sample information screen with ColorChecker box checked, b) standard barcode being scanned.
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6. On the main IMS panel select Instruments and Camera: Image Correction (Figure 27).
Figure 27: Image Correction command selection.
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1. Confirm the camera F-stop is set to 22 (Figure 31). F/22 is preferred for standard scanning with the current light set up; F/16 is also acceptable. For hard rock cruises, where 360° whole round scanning is required, a larger F-stop number is required.
Figure 31: Setting the F Stop on the Camera.
2. In the IMS control panel select Motion and then Drive Disable from the dropdown menu (Figure 32). You will have to move the camera by hand for the calibration, disabling the motor allows manual movement of the camera on the track.
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3. In the IMS control panel click Instruments > JAI Camera Settings (Figure 33). The lights turn on automatically when the JAI Camera Setup window opens.
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1. Click the Gains-Black-Shade-Flat tab (Figure 36).
Figure 36: JAI Camera Setup Window showing the Gains-Black-Shade-Flat tab. The Gains-Black-Shade-Flat tab is outlined in red.
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2. Click the Clear All Gains, Clear Black Gains, Remove Pixel Black Correction, Remove Shading Correction, and Remove Pixel Gain Correction (Figure 37). You will notice all values in the Master and Black gains go to zero.
Figure 37: Remove the corrections and clear gains.
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8. When the light grey (white) and the dark grey are well balanced you can move on to applying corrections. How long the lights have been will affect the color balance. If the lights have gotten quite warm and everything looks even, then when the lights are 'cold' the blue channel will be lower than the others.
9. Click Lights OFF
Figure 39: Adjusting master black of the darkest patch to obtain RGB values of ~40.
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2. Take the lens cap (Figure 40) and place on lens (Figure 41). The lens cap is located in drawer PP-2B.
Figure 40: Lens cap for the camera
Figure 41: Lens Cap being put on camera
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4. Remove lens cap when finished.
Figure 42: Grab and Profile after the Pixel Black Correction applied.
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4. Defocus the lens on the camera just a little bit (Figure 44). Look at the Profile graph and slightly rotate the lens’ focus until the RGB lines are smoother, but still have some variation.
Figure 43: The Gray silicone mat being cleaned with tape.
Figure 44: The lens being unfocused.
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5. The RGB lines should appear “bowed” evenly across profile and centered in the image (Figure 45). If not check the orientation of the gray mat, it needs to be flat and perpendicular to the camera. This very important!
Figure 45: Grayscale card corresponding RGB Profile visible.
6. Click the Shading Correction - Flat Method button. This can take a few seconds, don’t click anything else until it is done. The RGB lines should now be flat (Figure 46).
Figure 46: Image grab and profile after the Shading Correction has been applied.
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2. Click the Pixel Gain Correction - Flat Method button and move the camera very slowly back and forth. This averages the pixels and helps eliminate streaking in the image. This will take several seconds, don’t click anything else until it is done. When its done the RGB lines should still be flat and the individual RGB the same, but may not be equal to each other (Figure 47).
Figure 47: Grab and Profile after the Pixel Gain Correction has been applied.
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5. In the IMS Control panel click Motion and then Drive Enable (Figure 48). This allows the software to control the camera movement.
Figure 48: Drive enable control highlighted.
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1. Place the 3D calibration standard on track as shown (Figure 49). The color squares must be oriented as pictured below, butted against the red reflection bar.
Figure 49: Color standard in track in correct orientation.
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5. When the image has finished click Crop and then Save. We use the uncropped image so the crop here is not important.
Figure 50: a) sample information screen with ColorChecker box checked, b) standard barcode being scanned.
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6. On the main IMS panel select Instruments and Camera: Image Correction (Figure 51).
Figure 51: Image Correction command selection.
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10. Draw another ROI box around the Color Checker squares and this time making sure to only have MacBeth colorchecker in the box. White squares will appear inside each square. Adjust the box to get those white squares close to the center of the color squares. Do not click Crop again.
Figure 52: Image Correction Window. Steps are indicated in the figure.
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4. In the Tiff Correction tab adjust the LUT polynomial order values for the Red, Green, and Blue channels (Figure 53-5). Adjust these values to create the lowest residual error with the smoothest curve in the Uncorrected Image tab. Values should be around 4. Make sure that the curve does not wave about. If it does the order values need to be lowered. Also check that the corrected ROI and MacBeth values should be very close. Make sure that the white does not exceed the MacBeth value. If you are unable to produce a reasonable correction curve, it is necessary to redo your White Balance by Shutter Correction in the Calibration section above.
Figure 53: Steps for Tiff Correction illustrated on image. 1. Redraw box on color squares. 2. Select Tiff Correction Mode. 3. Put graph on Uncorrected Image. 4. Select Tiff Correction to view polynomial order. 5. Adjust polynomial order. 6. Check graph for linear relationship.
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3. Click JPEG Corrections tab (Figure 54-3). Adjust the Brightness, Contrast, and Gamma levels (Figure 54-4) to achieve a straight line in the Applied Corrections tab and the ROI Corrected box should have values near 243 for the white square. We want a linear relationship between the measured and given values. Each BCG setting adjusts the line in different ways and there are many different ways to adjust the values to achieve a linear relationship. You want to achieve a good image with good brightness, where the image has good saturation and not too washed out. The Applied Corrections Graph should be a straight line and the ROI Corrected Box should have values near 250. These may change depending on the instance of extreme colors, extremely white or extremely dark cores, in which the settings may have be tweaked more to get a user friendly consumer image.
Figure 54: Steps for JPEG Correction illustrated on image. 1. Select JPEG Correction Mode. 2. Select Applied Corrections tab on graph. 3. Select JPEG Correction to see Brightness, Contrast, and Gamma Corrections. 4. Adjust Brightness, Contrast, and Gamma corrections. 6. Check graph for Linear Relationship. 7. Check the boxes in the Color Checker and compare to RGB values in corrected image.
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3. Put the Calibration Standard in the track (Figure 33). The color square must be oriented as pictured below.
Figure 33: Color standard in track in correct orientation.
4. Select the tab RATES and EXPOSURE (Figure 34).
Figure 34: Rates and Exposure window, the tab is highlighted in red.
5. On the Green Lock control select OFF (Figure 35). The other exposures are now adjustable.
Figure 35: Green Lock control highlighted in red and set to off.
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8. Click the Start Grab (Figure 36).
Figure 36: Start Grab button highlighted in red.
9. Move the camera over the Macbeth color standard until you see the white, dark blue, orange and brown color bars in the image. Place the cursor in the white square, right-click and draw a rectangle by dragging diagonally. Release the mouse when you have select most of the white bar. The rectangle (marked in green) should only have the white color and nothing else inside (Figure 37).
Figure 37: The grab window is highlighted in red. A green square is drawn in the white color square of the appropriate row.
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2. Put the Calibration Standard in the track (Figure 33). The color square must be oriented as pictured below.
Figure 33: Color standard in track in correct orientation.
3. Select the tab RATES and EXPOSURE (Figure 34).
Figure 34: Rates and Exposure window, the tab is highlighted in red.
4. On the Green Lock control select OFF (Figure 35). The other exposures are now adjustable.
Figure 35: Green Lock control highlighted in red and set to off.
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7. Click the Start Grab (Figure 36).
Figure 36: Start Grab button highlighted in red.
8. Move the camera over the Macbeth color standard until you see the white, dark blue, orange and brown color bars in the image. Place the cursor in the white square, right-click and draw a rectangle by dragging diagonally. Release the mouse when you have select most of the white bar. The rectangle (marked in green) should only have the white color and nothing else inside (Figure 37).
Figure 37: The grab window is highlighted in red. A green square is drawn in the white color square of the appropriate row.
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1.To access the scratch sheet configuration options, click the Instruments button and follow the menu down to Camera: VCDS Setup. The parameter screen will then display (Figure 19).
Figure 19. Select VCDS Setup
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Navigate to the 'View' button on the toolbar. Select the 'Tools Palette' Option (Figure 20).
Figure 20. Select Tools Palette on LabVIEW
2. The Tools Palette window will appear (Figure 21). This allows you to select objects.
Figure 21. Tools Palette window
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