unsigned char*转QImage
时间: 2023-10-22 15:10:15 浏览: 168
将unsigned char*转换为QImage,可以使用QImage的构造函数,例如:
unsigned char* data = ...; // 传入的unsigned char*数据
int width = ...; // 图像宽度
int height = ...; // 图像高度
QImage image(data, width, height, QImage::Format_RGBA8888);
这里使用了QImage的Format_RGBA8888格式,也可以根据实际情况选择其它格式。
相关问题
imagecamera.o: In function `yuyv_to_rgb888(unsigned char*, unsigned char*, int, int)': imagecamera.cpp:(.text+0x0): multiple definition of `yuyv_to_rgb888(unsigned char*, unsigned char*, int, int)' main.o:main.cpp:(.text+0x538): first defined here imagedrivecamera.o: In function `yuyv_to_rgb888(unsigned char*, unsigned char*, int, int)': imagedrivecamera.cpp:(.text+0x0): multiple definition of `yuyv_to_rgb888(unsigned char*, unsigned char*, int, int)' main.o:main.cpp:(.text+0x538): first defined here moc_imagecamera.o: In function `yuyv_to_rgb888(unsigned char*, unsigned char*, int, int)': moc_imagecamera.cpp:(.text+0x118): multiple definition of `yuyv_to_rgb888(unsigned char*, unsigned char*, int, int)' main.o:main.cpp:(.text+0x538): first defined here moc_imagedrivecamera.o: In function `yuyv_to_rgb888(unsigned char*, unsigned char*, int, int)': moc_imagedrivecamera.cpp:(.text+0x118): multiple definition of `yuyv_to_rgb888(unsigned char*, unsigned char*, int, int)' main.o:main.cpp:(.text+0x538): first defined here
这是因为在多个源文件中都定义了相同名称的函数,导致链接器无法确定使用哪个定义。解决方法是将函数定义放在单独的源文件中,并将函数原型声明放在头文件中。然后在需要使用该函数的源文件中包含头文件即可。如果多个源文件都需要使用该函数,则需要在其中一个源文件中定义该函数,并在其他源文件中使用extern关键字声明该函数。例如:
// function.h
#ifndef FUNCTION_H
#define FUNCTION_H
void yuyv_to_rgb888(unsigned char* yuv, unsigned char* rgb, int imgWidth, int imgHeight);
#endif
// function.cpp
#include "function.h"
void yuyv_to_rgb888(unsigned char* yuv, unsigned char* rgb, int imgWidth, int imgHeight) {
// 函数实现
}
// main.cpp
#include "function.h"
int main() {
// 调用函数
yuyv_to_rgb888(yuv, rgb, width, height);
return 0;
}
// other.cpp
#include "function.h"
extern void yuyv_to_rgb888(unsigned char* yuv, unsigned char* rgb, int imgWidth, int imgHeight);
void otherFunction() {
// 调用函数
yuyv_to_rgb888(yuv, rgb, width, height);
}
解释unsigned char*** splitImage(unsigned char* Image, int* Row, int* Col) { int paddedRow = *Row; int paddedCol = *Col; if (paddedRow % 8 != 0) paddedRow += 8 - (paddedRow % 8); if (paddedCol % 8 != 0) paddedCol += 8 - (paddedCol % 8); unsigned char* paddedImage = (unsigned char*)malloc(paddedRow * paddedCol * sizeof(unsigned char)); for (int i = 0; i < paddedRow; i++) { for (int j = 0; j < paddedCol; j++) { if (i < *Row && j < *Col) { paddedImage[i * paddedCol + j] = Image[i * (*Col) + j]; } else { paddedImage[i * paddedCol + j] = 0; } } } int blockRow = paddedRow / 8; int blockCol = paddedCol / 8; unsigned char*** blocks = (unsigned char***)malloc(blockRow * sizeof(unsigned char**)); for (int i = 0; i < blockRow; i++) { blocks[i] = (unsigned char**)malloc(blockCol * sizeof(unsigned char*)); for (int j = 0; j < blockCol; j++) { blocks[i][j] = (unsigned char*)malloc(64 * sizeof(unsigned char)); for (int x = 0; x < 8; x++) { for (int y = 0; y < 8; y++) { blocks[i][j][x * 8 + y] = paddedImage[(i * 8 + x) * paddedCol + (j * 8 + y)]; } } } } free(paddedImage); *Row = paddedRow; *Col = paddedCol; return blocks; }
登录
String username = JOptionPane.showInputDialog(null, "请输入用户名:");
String password = JOptionPane.showInputDialog(null, "请输入密码:");
User user = null;
for (User u : userList) {
if (u.getUsername().equals(username) && u这段代码实现了一个将一张图像分割成若干个 8x8 像素块的功能。具体来说,它的输入参数是一个指向表示原始图像像素值的一维数组的指针 Image,.getPassword().equals(password)) {
user = u;
break;
}
}
if (user == null) {
JOptionPane以及两个整型指针 Row 和 Col,分别表示原始图像的行数和列数。其中,Image.showMessageDialog(null, "用户名或密码错误!");
} else {
showUserInfoPage(user);
}
}
}
```
这段 数组的大小应该是 Row x Col,每个元素表示图像上对应位置的像素值。函数返回代码实现了读取用户和工厂信息文件、登录验证、显示个人信息页面、租用设备、更新用户一个指向三维 unsigned char 数组的指针 blocks,它是一个 blockRow x blockCol x 64 的数组,其中和工厂信息文件等功能。同时,利用JTable和JScrollPane实现了表格数据展示,并使用JOptionPane blockRow 和 blockCol 表示分割后图像的行数和列数,每个元素是一个 8x8实现了简单的对话框提示。需要注意的是,此处的文件读写操作使用了Java的IO流,需要进行异常处理。
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