Implementación de un Algoritmo para la Colorización de Video a Partir de una Imagen Muestra

2021 ◽  
Vol 5 (1) ◽  
pp. 71-76
Author(s):  
Y.A. Canché Chan ◽  
A. Capetillo Loeza ◽  
N.A. Sandoval Ramírez ◽  
M.R. Moreno Sabido ◽  
F.J. Hernández López
Keyword(s):  
Photographic Technique

En este artículo se propone la utilización de la técnica de colorización de video en escala de grises mediante la adaptación del algoritmo de colorización de imágenes. La colorización es una técnica fotográfica que se basa en transferir colores a una imagen en escala de grises, sepia o monocromática; en este trabajo se propone colorizar un video tomando el color de una imagen muestra, donde se comparan las luminancias de la imagen muestra con el video. La principal contribución de este trabajo consiste en la implementación del algoritmo para colorizar un video a partir de una imagen muestra, ya que anteriormente a esta investigación, esta técnica sólo funcionaba para imágenes. Los resultados de las pruebas muestran una colorización homogénea frame a frame, por secciones de video. This article proposes the use of the video colorization technique in grayscale by adapting the image coloring algorithm. Colorization is a photographic technique that is based on transferring colors to an image in grayscale, sepia or monochrome; in this paper is proposed coloring a video taking the color of a sample image, where the luminance of the image is compared with the video. The main contribution of this work is the implementation of the algorithm to coloring a video from a sample image, since prior to this research, this technique only worked for images. The results of the tests show a homogeneous colorization frame to frame, by sections of video.

A Re-examination of Dichoptic Tone Mapping

2021 ◽  
Vol 40 (2) ◽  
pp. 1-15
Author(s):  
Minqi Wang ◽  
Emily A. Cooper
Keyword(s):  
Virtual Reality ◽  
Visual System ◽  
Contrast Enhancement ◽  
User Studies ◽  
Objective Measures ◽  
Tone Mapping ◽  
Photographic Technique ◽  
Stereoscopic Displays ◽  
Visual Detail

Dichoptic tone mapping methods aim to leverage stereoscopic displays to increase visual detail and contrast in images and videos. These methods, which have been called both binocular tone mapping and dichoptic contrast enhancement , selectively emphasize contrast differently in the two eyes’ views. The visual system integrates these contrast differences into a unified percept, which is theorized to contain more contrast overall than each eye’s view on its own. As stereoscopic displays become increasingly common for augmented and virtual reality (AR/VR), dichoptic tone mapping is an appealing technique for imaging pipelines. We sought to examine whether a standard photographic technique, exposure bracketing, could be modified to enhance contrast similarly to dichoptic tone mapping. While assessing the efficacy of this technique with user studies, we also re-evaluated existing dichoptic tone mapping methods. Across several user studies; however, we did not find evidence that either dichoptic tone mapping or dichoptic exposures consistently increased subjective image preferences. We also did not observe improvements in subjective or objective measures of detail visibility. We did find evidence that dichoptic methods enhanced subjective 3D impressions. Here, we present these results and evaluate the potential contributions and current limitations of dichoptic methods for applications in stereoscopic displays.

scholarly journals A Photographic Technique for Constructing Life Tables for Bemisia argentifolii (Homoptera: Aleyrodidae) on Poinsettia

1996 ◽  
Vol 79 (3) ◽  
pp. 464 ◽  
Author(s):  
Mark S. Hoddle ◽  
Roy Van Driesche ◽  
John Sanderson ◽  
Mike Rose
Keyword(s):  
Life Tables ◽  
Bemisia Argentifolii ◽  
Photographic Technique

A Photographic Technique for the Detection of Presumptive Biochemical Mutants

Science ◽  
1949 ◽  
Vol 109 (2835) ◽  
pp. 446-447
Author(s):  
Rosa Meyersburg ◽  
Seymour Pomper ◽  
Victor M. Cutter
Keyword(s):  
Photographic Technique

scholarly journals STUDY OF SHIP'S TRACK AND MOTIONS AT PORT TARANAKI

1982 ◽  
Vol 1 (18) ◽  
pp. 166
Author(s):  
G. Greenstreet
Keyword(s):  
New Zealand ◽  
Time Lapse ◽  
Reference Levels ◽  
Photographic Technique ◽  
Optimum Depth

This paper describes a study carried out at Port Taranaki, New Plymouth, New Zealand to determine ship's track and motions at the port entrance. The results of the study being used to establish the extent (plan area) and optimum depth of proposed capital dredging works. The time lapse photographic technique, incorporating reference levels and bearings in each frame, used to record vessels entering and leaving the port is described, Maximum increases in ship's draft due to sea conditions are given.

scholarly journals Daguerrotype – the first ever practically used photographic technique Daguerrotype – the first ever practically used photographic technique

2014 ◽  
Vol 58 (2) ◽  
pp. 59-64
Author(s):  
J. Švadlena
Keyword(s):  
Electron Microscopy ◽  
Production Process ◽  
19Th Century ◽  
Silver Layer ◽  
Mechanical Resistance ◽  
Basic Information ◽  
Silver Halides ◽  
Photographic Technique ◽  
Photosensitive Layer ◽  
Conservation Interventions

Abstract The study summarises the basic information on daguerreotype, the first ever practically used photographic process, which was used mainly in the period 1840 - 1860. Daguerrotype takes advantage of a photosensitive layer of silver halides on a silver layer to capture an image, it uses a reaction of silver with mercury vapours to develop the image. The production process via daguerreotype as described hasn’t changed since its deployment and stabilisation in the middle of 19th century. The properties of a daguerreotype image are given by its soft microstructure, which could have only been described after introduction of the electron microscopy. The susceptibility of daguerrotypes to damage and degradations stems not only from their low mechanical resistance but also from unsuitable conservation interventions and archiving conditions.

A Photographic Technique for the Detection of Presumptive Biochemical Mutants

Science ◽  
1949 ◽  
Vol 109 (2835) ◽  
pp. 446-447
Author(s):  
Rosa Meyersburg ◽  
Seymour Pomper ◽  
Victor M. Cutter
Keyword(s):  
Photographic Technique
Sign in / Sign up

Export Citation Format

Share Document