Illustrator changes the image resolution on its own when placing it

For some genius reason, illustrator seems to use the physical image dimensions/dpi which you can set in photoshop rather than using the pixel dimensions like every other program on the planet. This worked for me: 

1. Open it in photoshop
2. Image->Image Size
3. UNCHECK "resample" so photoshop will not change the pixels, it will only change the DPI/Size. So let's say you have a 1000px by 1000px image which photoshop has set to a 4" x 4" physical size at 250 DPI, and you change the image size in photoshop to 8"x8"... with resample checked, you'll have a 2000x2000 image at 250 dpi. With resample unchecked, you will have the same exact 1000x1000 image, but it will set the dpi to 125.
4. Import the image with the new physical dimensions/dpi into illustrator and it will set fine.

I got the same problem. But I later I found out that instead of open or place the image, I simple drag down from the downloaded folder, The pixel size of the image does not changed a bit. I realized it very late but helped me a lot when i had to image trace them. Hope this is helpful to anyone who reads.

If you open the original file in illustrator and copy it to your desired illustrator file, the resize doesn't applied to the picture

People should learn that PPI's says nothing about resoultion. 

It's just information for a printer or output device.

If you take a 1000px x 1000px in photoshop, you can put it on 72ppi/dpi. The printer will print 1000/72 =13,8 inch wide/high. If you change the image to 300dpi (without checking 'RESIZE IMAGE') the resolution will still be 1000px X 1000px but the printer will print it at 1000/300 = 3,3 inches wide/hight!  So much misunderstading about dpi/ppi.  Just focus on RESOLUTION in pixels when you are working with pixels!

Hello, I have the same issue. Adobe, please could you fix it? If the image you've pasted has the resolution other than 72 ppi, Illustrator changes its size. Leave the size of the image - it is more important than ppi.

Adobe Illustrator Version 24.2 (64-bit)

I have just downloaded the trial for Illustrator.  I am currently having the same issue.  Whether I open, drag the image in, or place the image it comes out significantly less pixels than it is.  The difference does appear to be the difference between 72 and 300 DPI. 

A .bmp file @ 1039x673 pixels @ 300dpi when placed becomes 250.194 px by 162.06 px.  This must be very common and there must be a resolution out there somewhere.

Can anyone please advise?

It is infuriating that this question hasn't been answered properly.  I want all of my photos to come into illustrator at the correct size and resolution.  I should not have to resize them everytime.  I used to be able to drag photos into illustrator and they import at the correct size.  Some setting has changed because it alters every image to 72 ppi no matter what the original was.  Its infuriating.

63544742  wrote Illustrator changes the image resolution on its own when placing it , but not all the images !! I placed an image  with 300 ppi into illustrator and it changed to 72 ppi, that of course changed the size significantly. P.S. - I used place command in file menu, i dragged the image directly to illustrator and used the open command in file menu, same result - I checked the page resolution and the document raster effects, they both 300 - I tried another vector software it didn't change the image resolution. - I saved it as TIFF from photoshop (which read the size and resolution correctly) and illustrator got it right !! but i need it jpg !! So, what could be the problem here ??

There is no Page resolution in Illustrator, just Raster Effects, but that only is used for Effects.

Place and click to put the image in the document does not change the resolution, but dragging while placing will change it.

Which program created the image?

How did you check it had a 300 ppi resolution?

What does the Links panel say about the resolution?

Just a shot in the dark here if Bill's suggestion doesn't work.

When you place the image, make sure to just click. NOT click and drag. Clicking and dragging will resize the image, so the pixels will either be packed closer together (increasing the resolution) or further apart (decreasing the resolution).