updating label from worker thread

[prkhr4u]

I am having a multithreaded application.In one of the thread,I am doing some processing and after the processing I want to display a image.
I want to update the image after the processing.
I want to do something like this

ui->label->setPixmap(QPixmap("abc.bmp"));

ui->label->setPixmap(QPixmap("abc.bmp"));

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But I am unable to access ui->label from the worker thread.
Pl tell how to do this??