Resizing Issues

No Resizing Required

That's right, we no longer require club members to resize their photos for our bi-monthly competitions. So why have a web page about resizing your photos? Several reasons.

Projection via Zoom

If you attend our meetings via ZOOM, the resolution of your display device (phone, laptop, desktop computer) may be higher than the projector we use at Roane State Community College (RSCC).

The RSCC Projector

The projector at RSCC can only display 1920x1080 pixels. Whether a photo is 10x10 pixels or 10,000 x 10,000 pixels, the projector always displays 1920x1080 pixels. No more, no less.

Now, if your photo is 10,000 x 10,000 pixels, something must be done to squeeze it into those 1920x1080 pixels that the RSCC projector will display.
That photo must be resized.

Luckily, Lightroom, the application we use to judge photos in our club competitions, automatically resizes photos that are bigger than the size of the projector's hardware. So, no resizing is necessary.
But, the story doesn't end there.

Lightroom's resizing

Lightroom doesn't always display photos full screen. For various reasons, the projectionist may display photos at smaller sizes. If so, some of that beautiful resolution in your photo will not be visible.

Small photos look small

Plus, Lightroom does not usually magnify photos that are smaller than the screen. So, if your photo is 960x640, it will be displayed about four times smaller than if it were 1920x1080. The small picture won't entirely fill the screen so it's harder to see its details. Here's an example.

smallphotoss.jpg

Pixelation

Lightroom can enlarge a photo, but if it is small to start with, the result becomes more pixelated as it gets larger.

The small star (20x20 pixels) on our home page normally looks fine, but when greatly enlarged, individual pixels show up as squares.

smallstar.jpg

Tips for Best Results

  • Big, 16x9 aspect ratio photos are automatically resized to fit on the screen and are displayed as big as is possible.
  • Avoid entering a really small photo. Small photos will be displayed as small pictures on the 1920x1080 screen.
  • Tall-skinny and short-wide photos will only fill a part of the screen as in the following narrow portrait and wide panoramic image. These photos may be at a bit of a disadvantage when judged because they display smaller than photos with a 16:9 aspect ratio.
portnpans.jpg

Aspect Ratio

What is an Aspect Ratio?

The aspect ratio describes the relationship of an object's width to its height. Aspect ratios are written as mathematical expressions, like
width : height
or sometimes
width x height
Examples: 1920x1080, or 5:4
A 1920x1080 pixel photo has an aspect ratio of 16:9 when reduced to its simplest form.
1920 / 120 = 16
1080 / 120 = 9
When Lightroom squeezes your photo to fit inside the 1920x1080 box, it usually retains the Aspect Ratio of the photo.

If the aspect ratio is not retained, the photo will be squeezed or squashed!

distorteds.jpg My apologies to Colby.

Calculating the Aspect Ratio

Trying to simplify an aspect ratio like 5120:2880 is not particularly easy unless you use an Easy Aspect Ratio Calculator to do it for you. Give it a try!

Page Updated 07 08 2021