image not getting refreshed in Qlabel

[stampede]

Yes but why do you need disk access ? Worker can process the image and send the processed result directly to the display thread, what's wrong with that
now you have this:

[load image from disk] --> process it --> [save to disk] --> inform gui that image is updated --> [load from disk] --> display

[load image from disk] --> process it --> [save to disk] --> inform gui that image is updated --> [load from disk] --> display

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why not have this:

[load image from disk] --> process it -->  inform gui that image is updated, send the image via signal --> display

[load image from disk] --> process it -->  inform gui that image is updated, send the image via signal --> display

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