Related Experiment Video
Updated: Feb 25, 2026
11:23
Lensless Fluorescent Microscopy on a Chip
Published on: August 17, 2011
18.2K
Example-Based Image Colorization Using Locality Consistent Sparse Representation
Summary
This study introduces a novel example-based image colorization technique using locality consistent sparse representation. The method effectively colorizes grayscale images from a single reference, outperforming existing approaches.
Area of Science:
- Computer Vision
- Image Processing
- Artificial Intelligence
Background:
- Image colorization aims to add color to grayscale images, a complex task.
- Existing methods often struggle with naturalness and accuracy.
Purpose of the Study:
- To develop an automatic example-based image colorization method.
- To improve colorization accuracy and coherence using sparse representation.
Main Methods:
- A novel locality consistent sparse representation is employed.
- Features are extracted at the superpixel level (intensity, texture, semantic).
- A locality promoting regularization term enhances matching consistency.
Main Results:
- The method successfully colorizes grayscale images using a single reference.
- It outperforms state-of-the-art methods visually and quantitatively.
- An edge-preserving filter improves color coherence and sharpness.
Conclusions:
- The proposed sparse pursuit image colorization method is effective.
- It offers a robust and efficient solution for grayscale image colorization.
- This work represents a significant advancement in single-reference image colorization.
Related Concept Videos
01:24Color Vision
1.7K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
1.7K
01:12Perceptual Constancy
1.6K
Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
1.6K
01:13Special Staining Techniques
1.4K
Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...
1.4K
01:14Changes in Skin Color: Clinical Perspectives
3.9K
The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
3.9K
01:37Super-resolution Fluorescence Microscopy
14.7K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
14.7K
01:24Simple Staining Technique
4.5K
OverviewStaining techniques in microscopy enhance the visualization of microorganisms by increasing contrast and allowing the differentiation of cellular structures. Simple staining is one of the fundamental methods used to observe the basic morphological characteristics of microorganisms, including their size, shape, and arrangement. This method relies on the application of a single dye to stain the entire cell, producing a clear contrast between the cell and the background.FixationFixation is...
4.5K