HREM-Filters are sophisticated Wiener and Difference filters that extract a periodic feature from the noisy image. Since our filters can use locally-estimated two-dimensional background, they work even for non-ideal crystals, such as a nano-crystal or cylindrical crystal (as shown in the Flier). Furthermore, the iterative filters based on the random noise model for the background effectively reduce the shot noise (random noise/white noise) keeping non-periodic features. This is especially effective for a low-dose (S)TEM image.

Another feature of HREM-Filters is up-sampling filter. The data acquisition is often performed at a high magnification to obtain good looking images. Using upsampling, the data acquisition can be done at the optimum magnification, and smoothed images can be displayed by upsampling the acquired images. Using this technique a wider area can be observed at once in a single image. Using the Realtime module (optional), the upsampling will drastically change the data acquisition strategy.

Realtime module (the license for Realtime module is required) Read More

This module performs up-sampling noise filter in live, and reveals the sample structure even from a single frame at extremely low dose. Using the up-sampling, you can see a smooth sample structure even when the original image is taken with the sampling interval close to the Nyquist limit. Therefore, this module will accelerate the low-dose experiment in (S)TEM. If the final image size is large, you can select a small area, say 256×256 pixels, for a quick real-time processing.

Example Even at a dose rate as low as 0.25 el/pix/frame, you can observed the sample structure without accumulating the frames. The sample is MOF (Metal Organic Framework), and the image is acquired with a Gatan K2 camera working at Electron Counting mode. (see the first Reference below (M&M2020) for more details)

HREM-Filters Lite
When you install the HREM-Filters Lite, you can use some basic features of the <HREM-Filters Pro> and <Realtime-module> free of charge.

Flyer/Specifications

• pdf format

Manual

• HREM Filters (pdf)
• Realtime module (pdf)

References and Technical Notes (*Basic Readings)

• * Realtime up-sampling noise filter: Paradigm shift for data acquisition, M&M2020 (PDF)
• * Application of Optimum HRTEM Noise Filters in Mineralogy and Related Sciences, Microscopy and Analysis 22, November 2008.
• * Optimal Noise Filters in High-Resolution Electron Microscopy (Microscopy Today 2007 September) (pdf file)
• Optimal Noise Filters in High-Resolution Electron Microscopy (M&M2007) (pdf file)

Examples (Sample Data)

Download

You have to purchase a license (hardware key) to run this program.
Please send your price enquiry to support@hremresearch.com.

• HREM Filters Pro v4.3(Commercial Software)
  for GMS 3.5 (64bit)
  for GMS 3.4 (64bit)
  for GMS 3.3 (64bit) (applicable from GMS 3.0)
  for GMS 2.3 32bit    GMS 2.3 64bit
  for GMS 2.1 32bit    GMS 2.1 64bit (applicable from GMS 2.0)

• Realtime Module for HREM Filters Pro
  for GMS 3.5 (64bit)
  for GMS 3.4 (64bit)
  for GMS 3.3 (64bit) (applicable from GMS 3.0)
  for GMS 2.3 32bit    GMS 2.3 64bit
  for GMS 2.1 32bit    GMS 2.1 64bit (applicable from GMS 2.0)

• HREM Filters Lite v4.3(Free Software)
  for GMS 3.5 (64bit)
  for GMS 3.4 (64bit)
  for GMS 3.3 (64bit) (applicable from GMS 3.0)
  for GMS 2.3 32bit    GMS 2.3 64bit
  for GMS 2.1 32bit    GMS 2.1 64bit (applicable from GMS 2.0)

Required plug-ins.

• IPU plug-in (Free Software)
• HREM Mouse plug-in (Free Software)

User Key Driver

• User Key Driver / Remote Update System (RUS)

Previous versions

• HREM Filters Pro v4.2.1(Commercial Software)
  for GMS 3.5 (64bit)
  for GMS 3.4 (64bit)
  for GMS 3.3 (64bit) (applicable from GMS 3.0)
  for GMS 2.3 32bit    GMS 2.3 64bit
  for GMS 2.1 32bit    GMS 2.1 64bit (applicable from GMS 2.0)

• HREM Filters Lite v4.2.1(Free Software)
  for GMS 3.5 (64bit)
  for GMS 3.4 (64bit)
  for GMS 3.3 (64bit) (applicable from GMS 3.0)
  for GMS 2.3 32bit    GMS 2.3 64bit
  for GMS 2.1 32bit    GMS 2.1 64bit (applicable from GMS 2.0)

Archives

• HREM Filters Pro v4.2.1(Commercial Software)
  for GMS 1.x (32bit)

• HREM Filters Pro v1.7.1(Commercial Software)
  for GMS 1.x (32bit)

• HREM Filters Lite v4.2.1(Free Software)
  for GMS 1.x (32bit)

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