refresh image in a Qlabel

[prkhr4u]

I have set an image using Qlabel as:

ui->label->setPixmap(QPixmap("/home/hls/Grab-build-desktop-Qt_4_8_1_in_PATH__System__Debug/rgb.bmp"));

ui->label->setPixmap(QPixmap("/home/hls/Grab-build-desktop-Qt_4_8_1_in_PATH__System__Debug/rgb.bmp"));

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I am performing some image processing tasks,so I want to refresh my image continuously.
Currently it is showing the image which appears at the start of the application.
The application changes the image,and I want to change the image continuously in the label

How can i Do that?