Skip to main content
X
xiaohk
Participant
May 24, 2018
Question

Weird Tiff images in Photoshop?

  • May 24, 2018
  • 1 reply
  • 2887 views

Hello, I am trying to open a 16-bit grayscale tiff image in Photoshop.

If I open it directly, PS just gives me a black image.

However, if I first convert the image mode to 32 bits/channel and convert it back to 16 bits/channel, I can see the contents.

I am not sure exactly what PS has done to make the image content visible? How can I load the tiff image directly into PS?

Thank you!

You can download my image from Dropbox.

This topic has been closed for replies.

1 reply

JJMack
Community Expert
JJMackCommunity Expert
Community Expert
May 24, 2018

If you do not have this Problem with all Grayscale Tif file can you upload the problem tif to a files sharing site and post a link to it. If all have this problem I would suspect it may be graphics related try turning off GPU support in Photoshop.

JJMack
X
xiaohkAuthor
Participant
May 25, 2018

Thanks JJMack.

I found all the images have this problem. I inspect that the intensity level of those images are too low for 16-bits images, so they show up as black photos.

Once I convert them to 32-bits, then 16-bits, the intensity level of each pixel increases significantly. Do you happen to know what mechanism is Photoshop using for down-converting depth/channel?

The data set is in public domain. The url is here.

JJMack
Community Expert
JJMackCommunity Expert
Community Expert
May 25, 2018

I do not know why you woul want to convert to 32Bit grayscale.  When I downloaded the images they Open as 16Bit Grayscale the histogram shows that they are very  under exposed. All is black like the thumbnail and the image displayed in Photoshop..  Using Ctrl+L levels you can move the white right slider way over to the left where you can see there is some information in the histogram to spread that section out.  Commit the level adjustment. Ctrl+L again and play with the gray slider.

I know little about processing grayscale images.  These images may have an exposure problem.

JJMack
Terms & ConditionsAccessibility statement
Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices