CN105513012A - Oscilloscope digital fluorescence image rapid mapping method - Google Patents

Abstract

The invention discloses a method for quickly mapping digital fluorescent images of an oscilloscope. Count M and the row number N of the target image data, calculate the common multiple K of M and N; (3) copy K/M rows for each row of the source image data, and generate the image data that the vertical direction is K rows; (4) sequentially Each K/N row group of the image data is set up, along the vertical direction, K/N said row groups are in one-to-one correspondence with the M rows of the source image data, and any row in the row group is compared with the source image data If the line corresponding to the line group is consistent, if it is consistent, then take the first line of the line group along the vertical direction as a line of the target image, if it is inconsistent, then sum all the lines in the line group position by position, and then calculate the average value. is a line of the target image; (5) the display module outputs and displays the target image.

Description

A Fast Mapping Method for Oscilloscope Digital Phosphor Images

technical field

The invention relates to the technical field of image data mapping, in particular to a fast mapping method for oscilloscope digital fluorescent images.

Background technique

In the digital phosphor oscilloscope, the waveform image is generated by the phosphor module, the size of the horizontal direction is determined by the horizontal resolution of the liquid crystal, combined with the sampling rate and the horizontal time base, and the size of the vertical direction is quantified according to the sampling value, that is, the resolution of the ADC rate decision. Oscilloscopes commonly use 8-bit ADCs, that is, fluorescent images have 256 pixels in the vertical direction.

At present, the vertical resolution of the oscilloscope display screen is much larger than 256 pixels, and the vertical pixels allocated to the waveform display area are also more than 256. Therefore, after the display module reads the waveform image from the fluorescent module, it needs to vertically Amplify and then output display, that is, map the waveform image (source image) generated by the fluorescence module to generate the output image (target image) of the display module.

In image mapping processing, the commonly used methods are nearest neighbor interpolation and bilinear interpolation.

Since the target image and the source image are not in a one-to-one mapping relationship, there will be a problem that the coordinates of the target image are not integers when mapped to the coordinates of the source image. For a coordinate (x, y) of the target image, the corresponding floating point coordinates in the source image after mapping are (i+u, j+v), where i, j are non-negative integers, u, v are the interval [0 , 1] is a floating-point number.

The nearest neighbor interpolation method is when the target image coordinates are mapped to the source image coordinates, take the color of the point of the source image whose coordinate position is the closest to the color of the target image.

The bilinear interpolation method is to obtain the color of the target image according to the weighted operation of the four points around the mapped coordinates, that is, the color value F(x, y) of the target point is (i, j) according to the corresponding surrounding coordinates in the source image , (i+1, j), (i, j+1), (i+1, j+1) the color values of the four pixels are determined, and the corresponding formula is:

F(x,y)=(1-u)*(1-v)*f(i,j)+(1-u)*v*f(i,j+1)+

u*(1-v)*f(i+1, j)+u*v*f(i+1, j+1)

In the formula, f(i, j) represents the color value corresponding to the source image coordinate point (i, j).

In image mapping processing, the nearest neighbor interpolation method and bilinear interpolation method both need to perform floating-point operations coordinate by coordinate according to the size of the target image, which is inefficient, and the bilinear interpolation method requires four data points. The weighted calculation takes longer, which affects the refresh speed of the waveform.

Contents of the invention

The object of the present invention is to overcome or alleviate at least part of the above-mentioned shortcomings, and hereby provides a method for fast mapping of oscilloscope digital fluorescent images, which has the steps of:

(1) Read the digital fluorescent image data generated by the fluorescent module through the display module, that is, the source image data;

(2) Calculate the common multiple K of M and N according to the row number M of the source image data and the row number N of the target image data;

(3) each row of the source image data is copied to K/M rows to generate image data whose vertical direction is K rows;

(4) Set up each K/N row group of image data in turn,

Along the vertical direction, the K/N row groups are in one-to-one correspondence with the M rows of the source image data,

Comparing whether any row in the row group is consistent with a row corresponding to the relative row group of the source image data,

consistent, then take the first line of the line group along the vertical direction as a line of the target image,

Inconsistent, then sum all the rows in the row group position by position, and then calculate the average value as a row of the target image;

(5) The display module outputs and displays the target image.

Preferably, the K is the least common multiple.

Preferably, said N is greater than M.

The present invention can read the waveform image data generated by the fluorescence module, i.e. the source image data, calculate the least common multiple K according to the source image and the number of pixels M and N in the vertical direction of the waveform display area, and then copy each line of the source image data as K/M lines, and then extract the K/N lines in turn and take one line from the K/N lines or combine the mean values of all lines to generate one line of the target image; there is no need to perform floating-point operations on the coordinates of the target image, which realizes Fast mapping of digital fluorescence images, increasing the refresh rate of waveforms.

Description of drawings

These and other aspects of the invention will now be described in more detail with reference to the accompanying drawings, which show presently preferred embodiments of the invention. in:

Fig. 1 is the work flowchart of this embodiment.

detailed description

Below in conjunction with accompanying drawing and specific example, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

As shown in Figure 1, a fast mapping method for oscilloscope digital fluorescent images has steps:

The first step is to read the digital fluorescence image data generated by the fluorescence module through the display module, that is, the source image data. Then, the source image data includes multiple rows of data, and any row consists of several coordinate points.

The second step is to calculate the least common multiple K of M and N according to the row number M of the source image data and the row number N of the target image data. Then, K can be used as a correlating factor to relate M and N.

In the third step, K/M lines are copied from each line of the source image data to generate image data with K lines in the vertical direction. Then, the image data essentially includes a plurality of vertical row groups, and any row group includes K/M identical rows, and the same rows have the same coordinate points and their components.

In the fourth step, each K/N row group of the image data is set up successively, and the K/N row groups in the vertical direction are in one-to-one correspondence with the M rows of the source image data, and any row in the row group is compared with Whether the source image data is consistent with the row corresponding to the row group. If it is consistent, the first row of the row group is taken along the vertical direction as a row of the target image. If it is inconsistent, all the rows in the row group are summed position by position, and then the average is calculated. value as a row of the target image.

In the fifth step, the display module outputs and displays the target image.

In this embodiment, M=6, N=9, then K=18;

This embodiment can read the waveform image data generated by the fluorescent module, that is, the source image data, calculate the least common multiple of 18 according to the source image and the vertical pixel numbers of 6 and 9 in the waveform display area, and then copy each line of the source image data For 3 lines, 18 lines of image data are obtained. Then the 18 lines of image data are divided into 9 sets of line groups, and each set of line groups corresponds to one line of the source image data. By comparing each line group with one line of the source image data, it is judged that a line of the source image data is the copy source of the corresponding line group, or the adjacent lines of the source image data are judged to be the common copy source of the line group, then take the mean value .

Through the above-mentioned design scheme, this embodiment either directly copies or calculates the mean value to obtain all the lines of the target image, without performing floating-point calculations on each coordinate in the target image line, and realizes the fast mapping of the digital fluorescent image and improves the refresh rate of the waveform .

Claims (3)

1. a quick mapping method for oscillograph digital fluorescence images, is characterized in that having step:

(1) the digital fluorescence images data of fluorescent moieties generation are read by display module, i.e. source image data;

(2) according to the line number M of source image data and the line number N of destination image data, the common multiple K of M and N is calculated;

(3) every a line of source image data is copied K/M capable, generating vertical direction is the view data that K is capable;

(4) every K/N behavior a line group of view data is set up successively,

Vertically, M row one_to_one corresponding of K/N described row group and source image data,

Whether a line that any row in more described row group is corresponding with source image data opposing rows group is consistent,

Unanimously, then vertically get a line of the first behavior target image of described row group,

Inconsistent, then all row in described row group are put summation by turn, then calculating mean value is as a line of target image;

(5) target image exports and display by display module.

2. the quick mapping method of oscillograph digital fluorescence images according to claim 1, is characterized in that, described K is lowest common multiple.

3. the quick mapping method of oscillograph digital fluorescence images according to claim 1, is characterized in that, described N is greater than M.