High Contrast Stripes
High Contrast Stripes - Related Videos
10:07
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High-resolution intravital imaging with enhanced contrast up to 120 µm depth in lymph nodes of adult mice is achieved by spatially modulating the excitation pattern of a multi-focal two-photon microscope. In 100 µm depth we measured resolutions of 487 nm (lateral) and 551 nm (axial), thus circumventing scattering and diffraction limits.
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Axon guidance molecules regulate neuronal migration and targeted growth-cone navigation. We present a powerful method, the stripe assay, to assess the ability of guidance molecules to attract or repulse neurons. In this protocol, we demonstrate the stripe assay by showing FLRT2's ability to repel cultured hippocampal neurons.
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Phase Contrast and Differential Interference Contrast (DIC) Microscopy
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This protocol highlights the principles and practical applications of Phase and Differential Interference Contrast (DIC)...
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Phase Contrast and Differential Interference Contrast Microscopy
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Phase-Contrast Microscopes In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
05:50
Contrast Enhanced Vessel Imaging using MicroCT
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Cited by 17 •
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Contrast enhanced small animal vessel imaging by microCT is a rapid, cost-effective and high-throughput technique for serial in situ examination for tumor development, for analyzing the network of blood vessels that nourish them, and for following the response of tumors to preclinical therapeutic intervention(s).
FAQs
Abrupt transitions in brightness or color create strong visual edges that can be detected by an observer’s visual system. Those edges may make body boundaries more prominent, distort the animal’s apparent outline, or influence how movement is perceived. The resulting effect depends on the relationship between the pattern, the animal’s form, and the observer.
The sharper the change in luminance or color between neighboring bands, the more prominent the visual boundary can become. This affects how easily an observer detects the pattern and how strongly the body attracts attention or appears visually organized. Consequently, contrast can influence visibility, recognition, and the interpretation of a display.
A pattern’s visual effect is not fixed across all settings. Environmental light can alter how brightness and color differences appear, while background complexity can change whether the bands blend with surrounding visual structure or stand out from it. These conditions therefore help determine whether a pattern supports concealment, communication, or another biological function.
The value of a striped pattern depends partly on what the intended observer can detect and interpret. Differences in visual sensitivity can affect whether the bands are seen as conspicuous edges, a recognizable body pattern, or a less noticeable feature. This makes observer vision important when evaluating camouflage, warning displays, species recognition, and predator-prey interactions.
Researchers examine whether the pattern changes an animal’s visibility against particular backgrounds and under particular lighting conditions. They consider whether strong edges make the animal easier to detect or whether the pattern interacts with environmental structure in ways that reduce recognition of its body. These comparisons help connect coloration with concealment and survival in predator-prey settings.
The patterns provide a way to study several visual functions rather than a single outcome. Researchers can ask whether they affect camouflage, warning displays, species recognition, or predator-prey interactions, then relate those effects to background complexity, environmental light, and observer vision. This broad approach connects animal coloration with both survival and communication.
Their role can be evaluated by examining how the pattern changes detection, apparent shape, or perceived movement during an encounter. A visual effect that makes an animal more noticeable may support communication or warning, whereas an effect that reduces recognition against a background may contribute to concealment. The outcome depends on conditions and the observer involved.