Easy way to change image from 4:3 to 16:9 using Ms. Paint while respecting existing image aspect ratio
Assumptions:
- Height stays the same (only the width changes)
- Keep original image aspect ratio and keep the image in the middle of the new size image
- Add black boxes on the 2 sides to respect the exiting image perspective
Calculation for the new 16:9 size
- New width = 16 / 9 multiply by the height (note: we are trying to keep same height)
- E.g.: original size is 3840 x 2880 (4:3)
New width = 16 / 9 * 2880 = 5120
New image size = 5120 x 2880 (16:9)
Instruction using Paint to add 2 black bars on the side of the image
- Goal: increase image size from 3840 x 2880 to 5120 x 2880
- First increase image width to 4480 (File -> Image Properties)
- Rotate 180 degrees <- this is the main trick :)
- Increase width to 5120
- Use Fill tool to fill the 2 sizes with Black (or whichever color you like)
- Rotate 180 degrees to get back to the original format
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Just another note for my future reference :).
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