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Record W2488672052 · doi:10.1117/3.887920.ch4

Enhancement of Color Images

2011· book-chapter· en· W2488672052 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueSPIE eBooks · 2011
Typebook-chapter
Languageen
FieldComputer Science
TopicImage Enhancement Techniques
Canadian institutionsUniversity of Calgary
Fundersnot available
KeywordsArtificial intelligenceComputer visionBrightnessVisibilityComputer scienceImage qualityImage (mathematics)Contrast (vision)HueImage processingGeographyOptics

Abstract

fetched live from OpenAlex

In spite of the availability of advanced imaging devices with high sensitivity, high resolution, and built-in image-data processing procedures, images are often acquired with quality that is unsatisfactory or inadequate for certain purposes. When considering methods to modify such images with the aim of enhancing their quality, it is important to recognize and understand the several notions and factors that affect and determine the quality of an image; see Sections 2.2 and 2.3 as well as Rangayyan [6]. If further analysis of the processed image is to be performed by a human observer, the subjective and qualitative nature of such analysis needs to be taken into consideration. On the other hand, if subsequent analysis of the image is relegated to yet another computational procedure, the objective or quantitative requirements of the procedure should be taken into account in the design of the enhancement procedure. Thus, the nature and extent of enhancement to be effected on an image depend upon further use of the processed image. In most cases, the enhancement sought in an image would be aimed to achieve one or more of the following desired characteristics: • uniform or balanced brightness across the image, which may require dark areas to be made lighter and areas of excessive brightness to be made less bright; • good contrast and visibility of detail; • sharp and well-defined edges and borders of objects or regions in the image; • clean and clear representation of the original objects or scene with no noise or blemishes; • faithful reproduction of hues or shades of color, with particular attention to skin tone and hue in images of humans; and • good color balance to result in a pleasant appearance. Several digital image-processing techniques have been proposed to address the requirements stated above in the case of grayscale images [1, 6]. However, the extension of techniques designed for grayscale or monochromatic images to process color or vector images is neither straightforward nor always appropriate; the methods described in Chapter 3 to remove noise in color images illustrate some related concepts and methods.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: none
GenreCandidate signal: Other · Consensus signal: Other
Teacher disagreement score0.748
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.001
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.025
GPT teacher head0.240
Teacher spread0.215 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it