Stretching A 16-bit Image Without Changing Pixel Values

Hi,

I would like to see pixel values of 16-bit TIFF images in Photoshop CC2014. I'm able se 8-bit (0-255) pixel values using he histogram and info tabs but it seems that when 16-bit images are opened the pixel values are still displayed from 0-255.

I want to do to see this information for scientific purposes, not for typical photo editing. I've read many discussions about the practicality of editing 16-bit images but would like to avoid having my original question overrun by that discussion here. I am specifically looking for differences between pixels with more resolution than 8 bits.

I found one recommendation t check a box stating "show pixel values in 16-bit" or something like that but I have not yet been able to find the checkbox.

Thanks for any help.

Hi all,

I'm working with a marine imaging lab and have been utilizing Photoshop CC to make area measurements of sediment profile images (SPI) of the sub-seafloor.

Our camera set up utilizes a camera inside of a wedged prism that penetrates the seafloor and takes a photograph of the sedimentary matrix in-situ. The image returned is then manually separated into two layers in photoshop and measured, one layer for the portion of the image penetrating the sediment, and another for the portion of the image showing the water above the seafloor. By selecting each layer and commanding the histogram window to display a pixel count from the selected layer only we establish an area of penetration in out image. Up until today the histogram was giving me a very accurate reading. Today we updated our workflow to utilize 16 bit Adobe RGB images converted to .psd directly from camera raw in 300dpi resolution. Our previous workflow involved converting .raw to .jpeg to .psd in 8 bit, 300dpi resolution. The images look great now but the histogram returns a pixel count of about half of the previously measured values. What is going on here? I can still achieve n accurate pixel count by ctrl clicking my penetration layer and selecting a histogram read from entire image, it still drops a handful of pixels around the marquee but it is much closer to reality.

Any help would be much appreciated.

Cheers,

-Steve

I have this Cheese image which is sliced worm-shape. I want to know how to fragment/break it into pixel sized pieces, to look like sand. Pixellate might be a way, but it also applies a lot of new colors which are very different from the original size. And also Pixellate is not the smallest way possible.

Hello,
I do a lot of pixel art with PSP and would like to do it with PS. Tonight I tried and the pixels won't come out clear. Is there a secret to making pixel art with PS?

Thanks,
pslane

Hi guys,

I really love the sharpness/high quality of images and now I got a MacBook Retina I can see the details even more. I was wondering when starting a "New file", if the values of "Resolution" has an impact on the eventual quality of the image? If so, what are the best values to put here?

Looking forward to your replies, please help me get a better understanding of this.

I have a problem with photoshop. Everything I do gets pixelated.

When I paste or place an object from Illustrator CS6 I choose place as smart object and as soon as I pace it it gets pixelated. I have tried with and without the anti-aliased box checked. When the box is checked photoshop pixelates the image and when the box is not checked the image looks really strange and digital with the pixels showing. All curves that were smooth and nice in Illustrator looks jagged and strange.

When I try and draw a shape in photoshop it looks in the layer-list like it's a shape layer but the object is heavily pixeled.

I have tried opening a file created in Autocad (by using dwg to PDF) and opening it as a smart object in Photoshop. Everything is pixelated.

When starting a new file in PS I have a 300 pix per inch resolution, 16 bits RGB color, sRGB IEC61966-2.1 as my color profile and square pixels as my pixel aspect ratio.
Under general preferences I have the box for "Place or drag raster images as smart objects" (I have also tried without it). I have also tried with the box for "snap vector tools and transform to pixel grid" on and off.


Regardless of what i do photoshop still pixelates everything. I have no idea what to do. Could there be some sort of setting that I have overlooked?

Hi everyone, I introduced myself in a former thread. Name is Katie. I'm not new to Photoshop but am new to the more murky world of saving formats for various uses, printing, etc. I am in grad school, we're between semesters, and of all things they haven't really talked about saving! This week I was freelancing and saving to .JPG and .PNG, multiple images.

Problem:
I edited 150 images of product for a retail website on photoshopCS6. Company requires three sizes: two in .jpg, one in .png. Each image was in its own layer, in a group folder; a drop shadow effect was applied to the whole folder. For ea size requirement, I changed the canvas, resized all images at once to fit within it and ran the script.

I was able to run the Script on PS to batch save the .jpgs, and they RETAINED their canvas pixel dimensions in each image (700x525; 170x170). When I ran the same script to PNG-24, it worked but it DID NOT retain the canvas size and they were all wildly different.

I did some research, and found that people had to install script fixes to do this. I installed Dr. Russell's script for Image Processor Pro that should work in PS and Bridge. I tried it, still didn't work to retain size of PNGs. Am I simply using it wrong? Is that the only way to batch save certain file formats?

Because the images were due this morning, I individually saved every png ("save as" not "web/Devices") to ensure they were all 300x350.

I need to know there's a better way to do this for all other file formats, so I don't have to painstakingly save each image.

I have seen this image before and we may have used it a while back. With a whole new set of players, I feel it's safe to bring it back in a new challenge.

No comments from the cheap seats on the condition of her skin. This is a lovely young woman and I would hope that we can all treat her image with respect.

I encourage everyone to give it a try even if your new to Photoshop. All participants should be prepared to explain the techniques they have been using, as we can't learn or help without some idea as to how it was accomplished.

Good luck!



Here is my 1st attempt.

edit: I start by opening the original and duplicating it and then turning off the original layer.
I create a new layer. This is the layer that I will do all of the following adjustments on.

I started by using the following tools and settings.
Healing Brush Tool - Mode= normal - Source= Sampled - Clone sample mode= Current level and below.
Spot Healing Brush Tool - Mode= Normal - Type= Content aware - Sample cloned data from composited data= Sample all layers.
Brush Tool - Mode= Normal - Opacity= 100% - Flow= 1%

This is the image (Layer A) after only using the tools above and one added Levels Adjustment Layer.



edit: I then select the uppermost layer (Levels Adjustment layer) and hit Shift>Option>Command + E to stamp all visible layers. I then name this layer A.
I highlight all other layers except layer A and the original background layer and group them. I then turn off the group.

I then start where the tutorial starts with only the layer A turned on.

Here is the image after using a skin softening technique described in this video:

Hi all

Need someone the remove the backgrounds completely on these images PRETTY PLEASE

i keep trying but get a thin pixel layer of white around the lettering which looks awful!

(On the phone i still want the screen white just the background to the overall image gone)

Hi,

I am learning Photoshop in the hope of printing posters. I have questions regarding printing. Originally, when you create an image the resolution is set to 72 pixels/inch. I have learned I need to switch that to 300 pixel/inch.

1)Will I have to recreate all my images from scratch in 300 resolution?

2)Do I lose a lot of quality on the final product if i convert 72 -> 300.

3)My images are 11x17, when i hit 100% and view rulers, it shows my image at roughly a 3:1 ratio, why does it do this?

4)Can I view what a final printed image will look like with in Photoshop?

5)How do I preserve quality when switching to 300 resolution?

6)Say I use an image that is originally 600x600, will switching to 300 resolution make the new image horrible?

I may have more questions with as these get answered,
Thank you,
Geokatz