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stickymice
Known Participant
April 30, 2018
質問

artefacts on clean Photoshopfile with transparent background using inDesign

  • April 30, 2018
  • 返信数 3.
  • 3324 ビュー

I am using Adobe CC on a current year Macbook Pro. I have been experiencing some issues when working with images that have a transparent background - particularly silhouetted photos/images that have had their backgrounds removed. I am seeing some white pixels surrounding the silhouetted image when I place the the PSD file into inDesign and place it over a shape with a color fill. When I export the image from inDesign as a JPG, PNG, or PDF (various types) it seems to be adding some white pixels around my silhouetted head that are not actually in the original PSD file.


I tried changing the original PSD image to a PNG and TIFF with transparency and I still experience the same problem of inDesign adding white pixels.


The image looks cleanly masked when I view it in Photoshop, and when I add a layer behind it using the same color as the color fill I'm using in inDesign so I can check for extra white pixels, it looks crisp and clean in Photoshop.

FYI, Rather than using a mask, I have edited this image to remove any pixels that I do not want, so this image should not have any white pixels around it. However the same thing happens when I apply a mask with the pen tool and leave the pixels in place behind the mask.


Additional experiments included creating a simple color fill in Photoshop with a transparent background, and cropping out a section of the photo using the rectangular selection tool and seeing how that exports with inDesign In those instances, no white lines appeared, which leads me to believe that the subtle variations in line are part of the problem.

I did some experimenting with exporting settings, and when exporting to JPG I turned off anti-aliasing. This produced no white lines around my silhouetted image, but of course the text that this overall composition is a part of looked terrible and choppy, so that is not a solution I can work with.

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返信数 3

Community Expert
May 1, 2018

The images are most likely resampled in the export process, and the white lines (anti-aliased pixels) are created during the reconstruction of a new pixel grid. A workaround would be to resize the image in Photoshop to the final size in Indesign, so no resampling would occur, and help reduce the visual effect.

stickymice
stickymice作成者
Known Participant
May 1, 2018

That was a good idea, but it doesn't seem to be improving the issue very much. There are still some white pixels showing up. In case anyone wants to play with the PSD file, here it is. I cropped out the face for the purposes of this exercise, but the white pixels show up on the back of the head. (Please note, I know that crop on the back of his head looks awfully vertical, but it was from previous experiments where I was trying to see if a less complex line would cause the same results. I wouldn't silhouette someone's head that way!)

File: https://www.dropbox.com/s/e2stftw0nfohfmn/test-forums.psd?dl=0

Willi Adelberger
Community Expert
Community Expert
May 1, 2018

Use only PSD for transparent images. PNG does not suppurt every kind of transparency.

In Photoshop put a black layer behind this image to proof that there is no white border anymore.

rob day
Community Expert
Community Expert
May 1, 2018

I am seeing some white pixels surrounding the silhouetted image when I place the the PSD file into inDesign

Use only PSD for transparent images. PNG does not suppurt every kind of transparency.

The OP is placing a PSD.

rob day
Community Expert
Community Expert
April 30, 2018

When I export the image from inDesign as a JPG, PNG, or PDF (various types) it seems to be adding some white pixels around my silhouetted head that are not actually in the original PSD file.

Can you share the original PSD via Dropbox?