How to achieve Fuzzy masking effect！

JKSH

The fuzzy effect is called "bokeh".

Normally, people don't use code. People use cameras or Photoshop: http://www.youtube.com/watch?v=bvCZy3zRHAU

hk520590

thank you very much ,how to achieve by code!
[quote author="JKSH" date="1377005079"]The fuzzy effect is called "bokeh".

Normally, people don't use code. People use cameras or Photoshop: http://www.youtube.com/watch?v=bvCZy3zRHAU[/quote]

JKSH

Oh, do you mean: "How to blur the photo edges?"

You can use QML code: http://qt-project.org/doc/qt-5.1/qtgraphicaleffects/qml-qtgraphicaleffects1-maskedblur.html

It is hard to use C++ code.

hk520590

thank you，but my program is gui ！
[quote author="JKSH" date="1377048353"]Oh, do you mean: "How to blur the photo edges?"

You can use QML code: http://qt-project.org/doc/qt-5.1/qtgraphicaleffects/qml-qtgraphicaleffects1-maskedblur.html

It is hard to use C++ code.

[/quote]

JKSH

[quote author="hk520590" date="1377049309"]thank you，but my program is gui ！[/quote]It is hard to achieve the effect with C++ code.

It is better if you use an image editing program to make it blur. Then, save the blurred image.

hk520590

thank you ，my way is get two image by 'photoshop'!
but I think it is not good !
[quote author="JKSH" date="1377050466"][quote author="hk520590" date="1377049309"]thank you，but my program is gui ！[/quote]It is hard to achieve the effect with C++ code.

It is better if you use an image editing program to make it blur. Then, save the blurred image.[/quote]

JKSH

[quote author="hk520590" date="1377075638"]thank you ，my way is get two image by 'photoshop'!
but I think it is not good ![/quote]It is the best way.

There are 3 possible solutions:

Write image processing code in C++ to make the blur

Convert your GUI from C++ to QML, and then use the QML blur feature

Use Photoshop

(1) and (2) both take a long time. (3) is the fastest.

hk520590

thank you, but I want to the user self define,
how to achieve it?
sorry my English is poor!

hk520590

thank you, but I want to the user self define, how to achieve it?
sorry my English is poor!
[quote author="JKSH" date="1377079071"][quote author="hk520590" date="1377075638"]thank you ，my way is get two image by 'photoshop'!
but I think it is not good ![/quote]It is the best way.

There are 3 possible solutions:

Write image processing code in C++ to make the blur

Convert your GUI from C++ to QML, and then use the QML blur feature

Use Photoshop

(1) and (2) both take a long time. (3) is the fastest.[/quote]

JKSH

Choose (1) or (2)

If you want, you can post in a subforum with other languages like http://qt-project.org/forums/viewforum/39/

hk520590

thank you！
I have solved！
my way is：
@ QPainter p(this);

QRect rc(0,0,300,this->height());
p.drawImage(rc,image);

QLinearGradient linearGradient(280,0,300, 0); 

linearGradient.setColorAt(0,QColor(255,255,255,0));
linearGradient.setColorAt(1.0,image.pixel(150,50)); 

p.setBrush(QBrush(linearGradient));

p.setPen(QColor(255,255,255,0));
p.drawRect(0,0,this->width(),this->height());@

[quote author="JKSH" date="1377134599"]Choose (1) or (2)

If you want, you can post in a subforum with other languages like http://qt-project.org/forums/viewforum/39/[/quote]