Analytical method suitable for continuous high-resolution transmission electron microscope images

A technology of transmission electron microscopy and analysis methods, which is applied in image analysis, image data processing, instruments, etc., can solve the problems of small research scale, short growth period of nanowires, and difficulty in confirming the movement of atoms inside crystal planes, so as to reduce analysis errors. , The overall simple and easy to implement, the effect of ensuring the accuracy

Active Publication Date: 2015-08-05
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

Taking the growth process of sapphire nanowires reported by Sang Ho Oh as an example, due to the short growth period of nanowires and the small scale of research, it is difficult to confirm the movement of atoms inside the crystal plane during the growth process with existing research methods.

Method used

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  • Analytical method suitable for continuous high-resolution transmission electron microscope images
  • Analytical method suitable for continuous high-resolution transmission electron microscope images
  • Analytical method suitable for continuous high-resolution transmission electron microscope images

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Embodiment 1

[0029] Such as Figure 5 As shown, the present invention proposes a kind of analysis method for continuous high-resolution transmission electron microscope image, and it comprises the following steps:

[0030] 1) Perform frame-by-frame processing on continuous high-resolution dynamic images to obtain frame-by-frame images, wherein the frame rate of the frame-by-frame processing ranges from 10 to 100 frames / s;

[0031] 1.1) Convert the image obtained in step 1) into a grayscale image in BMP format. In order to ensure that no information is lost during the conversion process, it is required to ensure that the image resolution in the horizontal and vertical directions is not less than 72dpi;

[0032] 1.2) Perform Fourier transform on the grayscale image obtained in step 1.1) to obtain a Fourier transform frequency spectrogram to confirm the correlation between adjacent images: the Fourier transform frequency spectrogram of two adjacent frames of images Subtraction, the size of t...

Embodiment 2

[0040] figure 1 It is a flow chart of the continuous high-resolution transmission electron microscope image research method. Taking the research on the VLS growth process of sapphire nanowires as an example, the specific steps include:

[0041] (1) Framing the HR-TEM images provided by S.H.Oh et al., with a frame rate of 25 frames / s, to obtain the corresponding real-field images.

[0042] (2) Perform grayscale conversion on the obtained real-field image, and convert it into a grayscale image in BMP format, with a horizontal and vertical resolution of 72dpi. Perform Fourier transform on the obtained grayscale image to obtain the Fourier transform frequency spectrogram, such as figure 2 shown.

[0043] (3) Carry out preliminary verification to confirm the correlation between adjacent images. The Fourier transform frequency spectrograms of two adjacent frames of images are subtracted, and the size of the changed region accounts for 5% of the total area, which is considered t...

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Abstract

The invention discloses an analytical method suitable for continuous high-resolution transmission electron microscope images. The analytical method includes the following steps: framing processing is performed on continuous high-resolution dynamic images to obtain framed images; correlation processing is performed on the acquired framed images to obtain a correlation coefficient matrix; difference value processing is performed on the acquired correlation coefficient matrix to obtain a correlation coefficient difference value matrix; and the acquired correlation coefficient difference value matrix is converted to a contour map, different areas and boundaries between the areas are distinguished in a short time according to the range and the shape of contour lines, subtle motion changes of the continuous images are obtained according to changes in values of the contour lines and the average rate of change, and a transmission mechanism of energy is acquired. According to the analytical method suitable for the continuous high-resolution transmission electron microscope images, framing, conversion and correlation processing are performed on the images, the obtained correlation coefficient matrix that is calculated, the method converts atom or atomic cluster motion information that cannot be expressed quantitatively originally to information that can be analyzed quantitatively, an implementation process is relatively simple, and thus the method is easy to implement.

Description

technical field [0001] The invention relates to the technical field of continuous image processing methods, in particular to an analysis method suitable for continuous high-resolution transmission electron microscope images. Background technique [0002] Continuous high-resolution transmission electron microscopy is widely used in the characterization of crystal morphology and structure due to its high resolution, which can obtain three-dimensional diffraction information, is beneficial to analyze the symmetry of point group and space group, and is convenient for computer storage and processing. However, there is still a lack of methods for analyzing continuous high-resolution dynamic images. Taking the growth process of sapphire nanowires reported by Sang Ho Oh as an example, due to the short growth period of nanowires and small research scale, it is difficult to confirm the movement of atoms inside the crystal plane during the growth process with existing research methods....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/20
Inventor 于成龙曹舒尧王斐王道益温志刚
Owner SHAANXI UNIV OF SCI & TECH
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