Q: My image doesn’t have a scale bar – what do I do?

Open DigitalMicrograph . Go to the top menu bar and select Microscope > Calibrate Image . Follow the on-screen instructions to calibrate your image. This process will allow you to add an accurate scale bar based on your calibration. Need more help? Check out the step-by-step guide: Introduction to magnification calibration

Q: How do I improve the signal-to-noise in my images?

Follow these steps: Adjust microscope settings Increase beam intensity: Use a larger condenser aperture. Select a smaller spot number. Converge the beam more tightly on the camera. Adjust camera settings Binning: Enable image binning to combine pixels, which increases SNR but reduces image resolution. Exposure time: Use a longer exposure time for both View and Capture modes to collect more signal.

Q: How do I apply drift correction to my captured images?

Follow these steps in DigitalMicrograph: Start a live View on the camera Check the Correct Drift box in the camera palette A blue box will appear on your image view. Drag and position this box over a strong, easily identifiable feature in your image (such as a distinct particle). This feature will be used by the drift correction algorithm to track and align camera frames before outputting the final image Begin your image acquisition. The software will apply drift correction in real time.

Q: I see strange features in my camera image that do not go away. What do I do?

Step-by-step instructions: Enable Power User mode: Go to the top menu bar and select Help \ User Mode \ Power User to enable. Take new dark references: Go to the top menu bar and select Camera \ Prepare Dark Reference. Follow the instructions to acquire. Take new gain references: Go to the top menu bar and select Camera \ Prepare Gain Reference. Follow the instructions to acquire. Check your image again: After updating both references, capture a new image and see if the strange features are resolved. If the issue persists: Contact Gatan service for expert assistance. Tip: Regularly updating dark and gain references can prevent many common imaging artifacts. If you continue to see unexplained features, there may be a hardware or software issue that requires professional support.

Q: My camera is not cooling to the operating temperature and DigitalMicrograph is giving me warnings.

Step-by-step instructions: Check the water flow to the camera: Ensure water is flowing continuously and at the rate specified in your camera’s manual. Inspect the water lines for any kinks, bends, or blockages that could restrict flow. Confirm that the water supply is turned on and functioning properly. Verify camera settings: Check for any error messages or warnings in DigitalMicrograph and follow any recommended actions. If the issue persists: Contact Gatan service for expert assistance. Tip: Proper water flow is essential for camera cooling. Regularly inspect and maintain your cooling system to prevent temperature-related issues.

Q: How do I get an FFT of my camera image?

Follow these steps: Select your image in DigitalMicrograph Go to the top toolbar and click on Process. Choose FFT from the dropdown menu. Shortcut: Press CTRL + F to quickly open the FFT function. For a live FFT: Start a live View from your camera. Go to Process \ Live \ FFT. Shortcut: Press CTRL + SHIFT + F for a live FFT that updates continuously as your image changes. To analyze a specific region: Draw a Region of Interest (ROI) on the area you want to analyze. Use the same FFT commands ( Process \ FFT or CTRL + F ) to get an FFT of just the selected ROI. Tip: Using Fast Fourier Transform (FFT) helps you analyze spatial frequencies and patterns in your image, which is useful for identifying periodic structures or assessing image quality.

Q: How can I batch convert DigitalMicrograph images (e.g., *.dm3, *.dm4) to a different format?

Follow these steps: Open DigitalMicrograph. Go to the top menu bar and select File \ Batch Convert. Choose the folder containing your DigitalMicrograph images (e.g., *.dm3, *.dm4). Select your conversion option: Save Image As: Converts and saves the raw image data in your chosen format (e.g., *.tiff, *.mrc). Save Display As: Converts and saves a screen rendering of the image as it appears in DigitalMicrograph. Pick your desired output format from the available options. Start the batch conversion and wait for the process to complete. Tip: Use Save Image As for scientific analysis and Save Display As for presentations or sharing images as they appear on screen.

Q: Is there metadata stored with my images?

Yes. Follow these steps: Select your image in DigitalMicrograph. Right-click on the image and choose Image Info from the context menu. In the Image Info window, navigate to the Image \ Tags branch. Review the metadata tags stored with your image, including acquisition information, microscope settings, and other relevant details. Tip: Metadata provides important context for your images, such as how and when they were acquired, instrument parameters, and more. This information is useful for documentation, analysis, and troubleshooting.

Question 1

My image doesn’t have a scale bar – what do I do?

Accepted Answer

Open DigitalMicrograph.
Go to the top menu bar and select Microscope > Calibrate Image.
Follow the on-screen instructions to calibrate your image. This process will allow you to add an accurate scale bar based on your calibration.
Need more help?
Check out the step-by-step guide: Introduction to magnification calibration

Question 2

How do I improve the signal-to-noise in my images?

Accepted Answer

Follow these steps:

Adjust microscope settings
1. Increase beam intensity:
  1. Use a larger condenser aperture.
  2. Select a smaller spot number.
  3. Converge the beam more tightly on the camera.
Adjust camera settings
1. Binning: Enable image binning to combine pixels, which increases SNR but reduces image resolution.
2. Exposure time: Use a longer exposure time for both View and Capture modes to collect more signal.

Question 3

How do I apply drift correction to my captured images?

Accepted Answer

Follow these steps in DigitalMicrograph:

Start a live View on the camera
Check the Correct Drift box in the camera palette
A blue box will appear on your image view.
- Drag and position this box over a strong, easily identifiable feature in your image (such as a distinct particle).
- This feature will be used by the drift correction algorithm to track and align camera frames before outputting the final image
Begin your image acquisition.
- The software will apply drift correction in real time.

Question 4

I see strange features in my camera image that do not go away. What do I do?

Accepted Answer

Step-by-step instructions:

Enable Power User mode: Go to the top menu bar and select Help \ User Mode \ Power User to enable.
Take new dark references: Go to the top menu bar and select Camera \ Prepare Dark Reference. Follow the instructions to acquire.
Take new gain references: Go to the top menu bar and select Camera \ Prepare Gain Reference. Follow the instructions to acquire.
Check your image again: After updating both references, capture a new image and see if the strange features are resolved.
If the issue persists: Contact Gatan service for expert assistance.

Tip: Regularly updating dark and gain references can prevent many common imaging artifacts. If you continue to see unexplained features, there may be a hardware or software issue that requires professional support.

Question 5

My camera is not cooling to the operating temperature and DigitalMicrograph is giving me warnings.

Accepted Answer

Step-by-step instructions:

Check the water flow to the camera:
- Ensure water is flowing continuously and at the rate specified in your camera’s manual.
- Inspect the water lines for any kinks, bends, or blockages that could restrict flow.
- Confirm that the water supply is turned on and functioning properly.
Verify camera settings:
- Check for any error messages or warnings in DigitalMicrograph and follow any recommended actions.
If the issue persists: Contact Gatan service for expert assistance.

Tip: Proper water flow is essential for camera cooling. Regularly inspect and maintain your cooling system to prevent temperature-related issues.

Question 6

How do I get an FFT of my camera image?

Accepted Answer

Follow these steps:

Select your image in DigitalMicrograph
Go to the top toolbar and click on Process.
- Choose FFT from the dropdown menu.
- Shortcut: Press CTRL + F to quickly open the FFT function.
For a live FFT:
- Start a live View from your camera.
- Go to Process \ Live \ FFT.
- Shortcut: Press CTRL + SHIFT + F for a live FFT that updates continuously as your image changes.
To analyze a specific region:
- Draw a Region of Interest (ROI) on the area you want to analyze.
- Use the same FFT commands (Process \ FFT or CTRL + F) to get an FFT of just the selected ROI.

Tip: Using Fast Fourier Transform (FFT) helps you analyze spatial frequencies and patterns in your image, which is useful for identifying periodic structures or assessing image quality.

Question 7

How can I batch convert DigitalMicrograph images (e.g., *.dm3, *.dm4) to a different format?

Accepted Answer

Follow these steps:

Open DigitalMicrograph.
Go to the top menu bar and select File \ Batch Convert.
Choose the folder containing your DigitalMicrograph images (e.g., *.dm3, *.dm4).
Select your conversion option:
- Save Image As: Converts and saves the raw image data in your chosen format (e.g., *.tiff, *.mrc).
- Save Display As: Converts and saves a screen rendering of the image as it appears in DigitalMicrograph.
Pick your desired output format from the available options.
Start the batch conversion and wait for the process to complete.

Tip: Use Save Image As for scientific analysis and Save Display As for presentations or sharing images as they appear on screen.

Question 8

Is there metadata stored with my images?

Accepted Answer

Yes. Follow these steps:

Select your image in DigitalMicrograph.
Right-click on the image and choose Image Info from the context menu.
In the Image Info window, navigate to the Image \ Tags branch.
Review the metadata tags stored with your image, including acquisition information, microscope settings, and other relevant details.

Tip: Metadata provides important context for your images, such as how and when they were acquired, instrument parameters, and more. This information is useful for documentation, analysis, and troubleshooting.

Question 9

Can I acquire diffraction patterns with the camera without using a beam stop?

Accepted Answer

Yes, you can acquire diffraction data without a beam stop. Follow these steps for best results:

Adjust microscope settings for lower beam intensity than your imaging experiment:
1. Use the smallest reasonable selected-area aperture.
2. Select a larger spot number to decrease intensity.
3. Consider using a smaller condenser aperture.
Minimize unnecessary exposure on the camera:
1. Lower the phosphor screen or blank the beam when in diffraction mode and not actively using the camera.
For direct detection cameras: Refer to Acquiring counted electron diffraction data without a beam stop with Gatan electron counting direct detectors for additional guidance.

Tip: Always use the lowest beam intensity necessary for your experiment to protect your sample and camera.

Imaging FAQs

My image doesn’t have a scale bar – what do I do?

How do I improve the signal-to-noise in my images?

How do I apply drift correction to my captured images?

I see strange features in my camera image that do not go away. What do I do?

My camera is not cooling to the operating temperature and DigitalMicrograph is giving me warnings.

How do I get an FFT of my camera image?

How can I batch convert DigitalMicrograph images (e.g., .dm3, .dm4) to a different format?

Is there metadata stored with my images?

Can I acquire diffraction patterns with the camera without using a beam stop?