wavy lines coming when i give blur

[Guest]

Im using photoshop CS6, Wavy lines coming when i give blur, please see the sample image and give me one solution.

[c.pfaffenbichler]

Work in 16bit, starting with the RAW conversion.

[Guest]

Hi,

  I have tried starting RAW conversion with 16 bit, eventhough the lines are coming.

Thanks ,

Surya

[K´mo · Accepted solution]

Is your image still in 16 bit when you apply the blur? You can try adding some noise to those areas (on separate layer monochrome noise with blendin mode: soft light)

What does it look like if you look at those areas on 100% view? Could it be issue with rendering on screen with other zoom values?

[D Fosse]

If you still see this banding with a 16-bit file in Photoshop, it's in your display system.

Most panels work in 8-bit depth (some even in 6 bits). So you will see the individual steps from 0-255. If these steps are irregular, the problem could be the panel itself, calibration tables in the video card (also 8-bit), or a bad display profile.

It doesn't take much noise to break up and conceal banding. Any blurring removes that noise, so it becomes visible again.