int CVICALLBACK rowSplit (int panel, int control, int event, void *callbackData, int eventData1, int eventData2) { Point point; PixelValue grayLevel; int width; int height; int topRow; int num_row; int bottomRow; int _height; // 每行文字上界和下界的数目 int topm=0, botm=0; // 获取输入图像的宽高 imaqGetImageSize (DestImage, &width, &height); // 每行（反色后）白点的数目 int *pt = calloc(height, sizeof(int)); switch (event) { case EVENT_COMMIT: for(int h = 0; h < height; h++) { for(int w = 0; w < width; w++) { point.x = w; point.y = h; imaqGetPixel(SourceImage, point, &grayLevel); if(grayLevel.grayscale == 255.0) *(pt + h) = *(pt + h) + 1; } } // 记录每行文字上界和下界 for(int h = 0; h < height - 1; h++) { if(*(pt + h) == 0 & *(pt + h + 1) > 0) { topRow[topm++]=h; num_row = num_row + 1; } if(*(pt + h) > 0 & *(pt + h + 1) == 0) bottomRow[botm++] = h; } // 记录行分割后每行文字的高度 for(int topm = 0; topm < num_row; topm++) _height[topm] = bottomRow[topm] - topRow[topm]; break; } return 0; } int CVICALLBACK Quit_imgpanel (int panel, int control, int event, void *callbackData, int eventData1, int eventData2) { switch (event) { case EVENT_COMMIT: QuitUserInterface (0); break; } return 0; }

这段代码是一个基于NI Vision库的LabVIEW代码，用于实现行分割（也就是将一张图片分成多行文本）。其中，rowSplit()函数是一个回调函数，用于处理用户在LabVIEW界面上的操作；Quit_imgpanel()函数则是另外一个回调函数，用于响应退出按钮的点击事件。

具体来说，rowSplit()函数通过调用imaqGetPixel()函数来获取每个像素的灰度值，进而统计出每行（反色后）白点的数目，并记录每行文字的上下界以及每行文字的高度。最终，这些信息可以用于实现行分割。

由于这段代码是基于LabVIEW的，因此无法直接在其他编程语言中使用。如果您需要在其他编程语言中实现行分割，可以考虑使用OpenCV等计算机视觉库，或者使用OCR（光学字符识别）等技术。

相关问题

Labwindows cvi2017函数信号发生器完整代码

以下是一个简单的 LabWindows/CVI 2017 函数信号发生器的完整代码示例：

#include <cvirte.h>
#include <userint.h>
#include <utility.h>
#include <ansi_c.h>
#include <analysis.h>

#define PI 3.14159265358979323846

static int panelHandle;

double sineWave(double amplitude, double frequency, double time)
{
    return amplitude * sin(2.0 * PI * frequency * time);
}

double squareWave(double amplitude, double frequency, double time)
{
    double period = 1.0 / frequency;
    double halfPeriod = period / 2.0;
    double t = fmod(time, period);

    if (t < halfPeriod)
        return amplitude;
    else
        return -amplitude;
}

double triangleWave(double amplitude, double frequency, double time)
{
    double period = 1.0 / frequency;
    double t = fmod(time, period);
    double slope = amplitude / (period / 2.0);

    if (t < period / 2.0)
        return slope * t;
    else
        return slope * (period - t) - amplitude;
}

int CVICALLBACK panelCallback(int panel, int event, void *callbackData,
        int eventData1, int eventData2)
{
    switch (event)
    {
        case EVENT_CLOSE:
            QuitUserInterface(0);
            break;
    }

    return 0;
}

int main (int argc, char *argv[])
{
    double (*waveFunc)(double, double, double) = sineWave; // 默认使用正弦波
    double amplitude = 1.0;
    double frequency = 1.0;
    double sampleRate = 1000.0;
    double duration = 1.0;
    double timeStep = 1.0 / sampleRate;
    double *data;
    int numSamples;
    int i;

    if (InitCVIRTE (0, argv, 0) == 0)
        return -1;

    panelHandle = LoadPanel (0, "panel.uir", PANEL);
    SetPanelAttribute(panelHandle, ATTR_CALLBACK_DATA, NULL);

    InstallCtrlCallback(panelHandle, PANEL_WAVE_TYPE, waveTypeCallback, &waveFunc);
    InstallCtrlCallback(panelHandle, PANEL_AMPLITUDE, amplitudeCallback, &amplitude);
    InstallCtrlCallback(panelHandle, PANEL_FREQUENCY, frequencyCallback, &frequency);
    InstallCtrlCallback(panelHandle, PANEL_SAMPLE_RATE, sampleRateCallback, &sampleRate);
    InstallCtrlCallback(panelHandle, PANEL_DURATION, durationCallback, &duration);
    InstallCtrlCallback(panelHandle, PANEL_GENERATE_BUTTON, generateButtonCallback, &data);

    SetCtrlVal(panelHandle, PANEL_WAVE_TYPE, 0);
    SetCtrlVal(panelHandle, PANEL_AMPLITUDE, amplitude);
    SetCtrlVal(panelHandle, PANEL_FREQUENCY, frequency);
    SetCtrlVal(panelHandle, PANEL_SAMPLE_RATE, sampleRate);
    SetCtrlVal(panelHandle, PANEL_DURATION, duration);

    DisplayPanel(panelHandle);
    RunUserInterface();

    FreeWaveform(data);

    DiscardPanel(panelHandle);
    CloseCVIRTE();

    return 0;
}

int CVICALLBACK waveTypeCallback(int panel, int control, int event, void *callbackData,
        int eventData1, int eventData2)
{
    double (*waveFunc)(double, double, double) = (double (*)(double, double, double))callbackData;

    switch (event)
    {
        case EVENT_COMMIT:
            switch (GetCtrlVal(panelHandle, PANEL_WAVE_TYPE))
            {
                case 0:
                    *waveFunc = sineWave;
                    break;
                case 1:
                    *waveFunc = squareWave;
                    break;
                case 2:
                    *waveFunc = triangleWave;
                    break;
            }
            break;
    }

    return 0;
}

int CVICALLBACK amplitudeCallback(int panel, int control, int event, void *callbackData,
        int eventData1, int eventData2)
{
    double *amplitude = (double *)callbackData;

    switch (event)
    {
        case EVENT_COMMIT:
            GetCtrlVal(panelHandle, PANEL_AMPLITUDE, amplitude);
            break;
    }

    return 0;
}

int CVICALLBACK frequencyCallback(int panel, int control, int event, void *callbackData,
        int eventData1, int eventData2)
{
    double *frequency = (double *)callbackData;

    switch (event)
    {
        case EVENT_COMMIT:
            GetCtrlVal(panelHandle, PANEL_FREQUENCY, frequency);
            break;
    }

    return 0;
}

int CVICALLBACK sampleRateCallback(int panel, int control, int event, void *callbackData,
        int eventData1, int eventData2)
{
    double *sampleRate = (double *)callbackData;

    switch (event)
    {
        case EVENT_COMMIT:
            GetCtrlVal(panelHandle, PANEL_SAMPLE_RATE, sampleRate);
            break;
    }

    return 0;
}

int CVICALLBACK durationCallback(int panel, int control, int event, void *callbackData,
        int eventData1, int eventData2)
{
    double *duration = (double *)callbackData;

    switch (event)
    {
        case EVENT_COMMIT:
            GetCtrlVal(panelHandle, PANEL_DURATION, duration);
            break;
    }

    return 0;
}

int CVICALLBACK generateButtonCallback(int panel, int control, int event, void *callbackData,
        int eventData1, int eventData2)
{
    double *data = (double *)callbackData;
    double amplitude;
    double frequency;
    double sampleRate;
    double duration;
    double timeStep;
    int numSamples;
    int i;

    switch (event)
    {
        case EVENT_COMMIT:
            GetCtrlVal(panelHandle, PANEL_AMPLITUDE, &amplitude);
            GetCtrlVal(panelHandle, PANEL_FREQUENCY, &frequency);
            GetCtrlVal(panelHandle, PANEL_SAMPLE_RATE, &sampleRate);
            GetCtrlVal(panelHandle, PANEL_DURATION, &duration);

            timeStep = 1.0 / sampleRate;
            numSamples = (int)(duration * sampleRate);
            *data = (double *)MallocWaveform(sizeof(double) * numSamples);

            for (i = 0; i < numSamples; i++)
            {
                (*data)[i] = (*waveFunc)(amplitude, frequency, i * timeStep);
            }

            PlotY(panelHandle, PANEL_GRAPH, *data, numSamples, VAL_DOUBLE, VAL_THIN_LINE, VAL_EMPTY_SQUARE, VAL_SOLID, 1, VAL_BLUE);
            break;
    }

    return 0;
}

这个程序使用了三个不同的波形函数：正弦波，方波和三角波。您可以使用“波形类型”下拉列表框选择要生成的波形类型，然后设置振幅，频率，采样率和持续时间。单击“生成”按钮将生成波形数据，并将其绘制在图形窗口中。

labwindows中如何在将的文本框内输入的内容显示为*

您可以在LabWindows/CVI中使用一个文本框和一个回调函数来实现将输入内容显示为*的功能。具体步骤如下：

1. 在界面设计器中添加一个文本框控件，并为其设置一个回调函数。

2. 在回调函数中，使用GetCtrlVal函数获取文本框中输入的内容，并将其转换为*。

3. 将*形式的内容通过SetCtrlVal函数设置回文本框中。

示例代码如下：

#include <userint.h>
#include <string.h>

int CVICALLBACK TextCallback (int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    switch (event)
    {
        case EVENT_COMMIT:
            {
                char inputText[MAX_INPUT_LENGTH];
                char outputText[MAX_INPUT_LENGTH];
                GetCtrlVal(panel, control, inputText);
                memset(outputText, '*', strlen(inputText));
                outputText[strlen(inputText)] = '\0';
                SetCtrlVal(panel, control, outputText);
                break;
            }
    }
    return 0;
}

int main (int argc, char *argv[])
{
    int panelHandle;
    const int maxInputLength = 50;
    char inputText[maxInputLength + 1] = { 0 };
    
    if (InitCVIRTE(0, argv, 0) == 0)
        return -1;

    panelHandle = LoadPanel(0, "Text.uir", PANEL);
    SetCtrlAttribute(panelHandle, PANEL_TEXTBOX, ATTR_CALLBACK_FUNCTION_POINTER, TextCallback);
    SetCtrlAttribute(panelHandle, PANEL_TEXTBOX, ATTR_CALLBACK_DATA, 0);
    SetCtrlAttribute(panelHandle, PANEL_TEXTBOX, ATTR_MAX_ENTRY_LENGTH, maxInputLength);
    SetCtrlVal(panelHandle, PANEL_TEXTBOX, inputText);
    DisplayPanel(panelHandle);
    RunUserInterface();

    DiscardPanel(panelHandle);
    return 0;
}

在此示例代码中，我们使用了一个名为TextCallback的回调函数，在该函数中将获取到的输入内容转换为*形式，并通过SetCtrlVal函数将其设置回文本框中。注意，我们使用了一个常量MAX_INPUT_LENGTH来限制输入内容的长度，以避免出现缓冲区溢出等问题。