Instructions:

In experiment please set zoom in your browser to "Actual size".

If you monitor size is not enough to show entire image, you can use full screen mode (press F11 in your browser to start/end full screen mode).

If you are a student, please provide your real name and city. In that case your teacher will be informed about results and quality of your participation. Please, use latin letters.

In experiment you will choose an image with better visual quality from a given pair of images. To switch between two images press on the image. Make visible image with better visual quality and press any of "This is better" buttons.

You will make judgments for 100 pair of images.