开发平台(Platform): (Ex: Win10, Linux, ...)
win11
编译器(Ex: GCC, clang, VC++...)+目标环境(跟开发平台不同的话需列出)
vs2022
额外使用到的函数库(Library Used): (Ex: OpenGL, ...)
Qt、opencv、libtiff
问题(Question):
我在vs中使用Qt分别建立一个QAction和QSlider,该action(open_file)用来开启tiff-s
tack档,而QSlider则是控制显示图片的亮度。
但我在执行程式时发现slider在滑动时,connect的变量并没有真正执行与image的变化
想请问是否有其他写法能顺利执行
喂入的资料(Input):
预期的正确结果(Expected Output):
QSlider *myslider可以在cv::imshow更新image时,能及时对next_image做操作
(ex: Mat image*test_brightness) // test_brightness与QSlider连结
错误结果(Wrong Output):
程式码(Code):(请善用置底文网页, 记得排版,禁止使用图档)
// qt: test_show.cpp
test_show::test_show(QWidget *parent)
:QMainWindow(parent) ,ui(new Ui::testshowclass)
{
connect(open_file,&QAction::triggered,this,&open_and_show:open)
}
//...............
// 从QAction打开文件(16bit *tiff)到imshow都可以顺利执行
// 实作libtiff和cv::imshow的class
void open_and_show::open(){
QString Filename = QFileDialog::getopenfilename(this,tr("open"),tr("C:\\));
std::string filename = Filename.toStdString();
const char *mypath = filename.c_str();
TIFF *tif = tiffopen(mypath,"r");
TIFFGetField(tif,TIFFTAG_IMAGELENGTH,&height);
TIFFGetFiled(tif,TIFFTAG_IMAGEWIDTH, &width );
int ntotalframe = TIFFNumberOfDirectories(tif);
uint32_t *slicetif = new uint32_t[width*height];
for(int z=0;z< ntotalframe; ++z){
cv::Mat img(height,width,CV_32FC1,cv::Scalar:all(0));
TIFFReadRGBAImageOriented(tif,width,height,slicetif,ORIENTATION_TOPLEFT);
int ss = 0;
for (int i=0; i<height;i++){
for (int j=0; j<width ;j++){
img.at<float> = TIFFGetR(sliceTif[ss]);
s++;
}
}
TIFFReadDirectory(tif);
int test_brightness = 1;
cv::normalize(img,img,0,65535,cv::NORM_MINMAX,CV_16UC1);
cv::namewindow("hi",cv::WINDOE_GUI_EXPANDED);
cv::imshow("hi",img*test_brightness);
cv::waitkey(10);
}
}
//...............
// 当我想透过QSlider和connect,对img进行操作时却没反应
// Qt test_show.cpp
test_show::test_show(QWidget *parent)
:QMainWindow(parent),ui(new UI::testshowclass);{
......
open_and_show *show_class;
connect(myslider,SIGNAL(valueChanged(int)),this,SLOT(&test_show:: change_brigh
));
......
}
void test_show::change_brigh(){
int bri_val = myslider ->value();
show_class.set_brigh(bri_val);
}
//..............
void open_and_show::set_brigh(int brightness) {
if (test_brightness != brightness){
test_brightness = brightness;
}
}
补充说明(Supplement):
test_show是主要的widget
open_and_show则是另个实作的class