Compare image downsampling algorithms

With this tool you can compare various methods to downsample images. The images here are presented to you in random order. You task is to reorder the images by dragging them so that the best looking image is at the top and the worst at the bottom. After you've done organizing, click the link below and the program and method used will be shown to you. You might be surprised at the results — or not.

You can select from three different pictures. All of the images are resized to 300px x 187px so they aren't necessarily in correct aspect ratio. This is intentional to put emphasis to the different algorithms in different situtations.

Select image:
Show program and algorithm used | Download original version of this image

GD, using imagecopyresized with JPEG quality 50

GD, using imagecopyresampled with sharpening with JPEG quality 100

GD, using imagecopyresized with JPEG quality 100

Windows 7 Paint (v6.1)

Photoshop, using Bicubic Sharper

GD, using imagecopyresampled with JPEG quality 100

Photoshop, using Bicubic Smoother

Photoshop, using Nearest Neighbour

GD, using imagecopyresampled with JPEG quality 100

Photoshop, using Bilinear

Photoshop, using Bicubic