Colorization Chapter

The house experiment



This is a lower-resolution page, more convenient for an overview. Click on images to zoom.

The original pictures of houses below are part of the Pasadena Houses Caltech database. Copyrights: California Institute of Technology.

Page map: training set / test set / results


Training set (20 first images of the Pasadena Houses database)

These images are given as examples, in order to know what a color image looks like.
training image training image training image training image training image training image training image training image training image training image training image training image training image training image training image training image training image training image training image training image




Test images (2 images)

The following images are converted into grey-scale values, and will be used later as test images.
training image training image




Results

The following result is based on all the training images above. Pixels on a 2x2 or a 3x3 grid, respectively, only were colored.
For each test image are displayed:


test image test image
result result
color chosen color chosen
color variation predicted color variation predicted
most probable color locally most probable color locally

Note: the color is learned from texture (= small image patches) without information about location. That is to say, the algorithm does not know that the top of an image is likely to be blue (sky).

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