100% Crop, How To Do In Photoshop CS

Discussion in 'Digital Darkroom' started by eddie g, Jun 12, 2005.

  1. What is the definition of a " 100% " crop? How do I make a 100% crop in Photoshop CS? This is my first attempt but it turned out to be a 4x4 inch file that is 2348x2348 pixels. It's a cut out from a 20D raw file.
     
  2. Hi Eddie, Just zoom in to 100% by pressing CTL-ALT-0 (that's a zero, not the letter "O") then drag the crop tool over what you want to see (or show) and press enter. That's it! Good luck . . .
     
  3. no need to zoom in all the way - just simply take your straight scan/digital camera file and crop.

    that's it.

    a 100% crop is simply a crop of a section of a photo at it's original (i.e., 100%) resolution, without any resizing/resampling, usually to show how well (or poorly) a particular camera or scanner works.
     
  4. In printing a 75 percent crop means 3/4 the input image is not used A 90 percent crop means 9/10 is not used; 1/10 printed. Thus a 100 percent crop would be nothing printed; ie nonsense.
     
  5. <ctrl> <alt> "zero" will push your image frame out to fill the available space in the Photoshop window, either with or height, so that 100% of the image is visible. Subsequent <ctrl> <alt> "+" key combos will further push the image frame out to fill the other direction, and increase the zoom in steps. A few of these latter key combos will bring you to be 100% zoomed in.
     
  6. les

    les

    It usually refers to pixel-for-pixel imaging, e.g. the picture on the screen is full size. One pixel from the camera is represented by 1 pixel on the screen.
     
  7. Omitting the <alt> will leave the image window as-is, just doing the zoom. Replacing "+" with "-" will... (you know where this is going)
     
  8. It's interesting to consider the difference between Kelly's language and the other answers. It seems to have become common usage for a "100% crop" to mean the whole image - essentially, an "uncropped image" and a "100% crop" would mean the same thing in that case. Nonsensical, perhaps.
     
  9. if Leszek is right, which he makes sense, then how would one achieve that 1 to 1 ratio? In Photoshop CS, you can change the PPI when you crop. So how does one determine what the PPI should be at when croping (to ensure a 1 to 1 pixel ratio)?
     
  10. if I have a photo of a family reunion and I want to crop so that only my head is in the image to be posted...and my camera is a 20D having resolution of 3504x2336 in raw...and in photoshop I crop so that it's 3x4 inch, then what should the ppi be in PSCS in order to achieve an image where each pixel of the image is represented by 1 pixel on the monitor?
     
  11. Try this: make a duplicate of the iamge. Now find out the resolution (PPI) the image is in.

    In crop mode set the crop size size to 3 x 4 inches and the resolution to the same
    resolution the imagege is already in. starting at zero /zero on the rulers make a crop
    selectionarea that is 3x4 in size . grab this selection area and move it till your head is in
    the center of this selection area. Now crop the iamge (rememebr you are working n the
    duplicate, notthe original. Now you have a 100% resolution crop at 3x4 inches. If your
    head is very small i nthe iamge you may want to change from bicubic to bicubic sharper
    interpolation and upsize the iamge in 110% steps till it is the size you need at that
    resolution.
     
  12. I found my answer by playing around with y'alls ideas. In PSCS just fill in the desired width and height and leave the resolution option blank. Then just crop and PSCS automatically crops the immage so that the number of pixels in the selection does not change resulting in a 100% crop. After you crop you can verify this by clicking on the "Front Image" button next to the clear button.
     
  13. http://photo.stackexchange.com/questions/19322/what-is-100-crop
    In Photoshop, pull up the original file, select "View" and select "Actual pixels." Crop the section that you want and save it.
    DO NOT RESIZE IT. Just save it.
    DO NOT SHARPEN IT.
    DO NOT MANIPULATE IT.
    Just save it.
    The phrase "100% crop" does not mean, in this context, what it meant in printing.
    --Lannie
     

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