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Intensity_SHG,_phase-matched_or_not.png (753 × 400 pixels, file size: 29 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
On the left, an intensity image of a cat. In the center, a gradient image in the x direction measuring horizontal change in intensity. On the right, a gradient image in the y direction measuring vertical change in intensity. Gray pixels have a small gradient; black or white pixels have a large gradient.
The contrast ranges from black at the weakest intensity to white at the strongest. [1] Grayscale images are distinct from one-bit bi-tonal black-and-white images, which, in the context of computer imaging, are images with only two colors: black and white (also called bilevel or binary images). Grayscale images have many shades of gray in between.
Georgia O'Keeffe – Hands (1919) by Alfred Stieglitz Georgia O'Keeffe – Hands , also known as Georgia O'Keeffe (Hands) , is a black and white photograph taken by Alfred Stieglitz in 1919. It is part of a large group of more than 300 photographs that he took of the painter Georgia O'Keeffe , from 1917 prior to their 1924 marriage, through 1937.
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In image processing, normalization is a process that changes the range of pixel intensity values. Applications include photographs with poor contrast due to glare, for example. Normalization is sometimes called contrast stretching or histogram stretching.
where I is the intensity or strength of the stimulus in physical units (energy, weight, pressure, mixture proportions, etc.), ψ(I) is the magnitude of the sensation evoked by the stimulus, a is an exponent that depends on the type of stimulation or sensory modality, and k is a proportionality constant that depends on the units used.
The hands are in white and black lines respectively, and some branches color the skins beige and brown, a reference to race and ethnicity issues and to the civil rights movement. The Democratic Socialist Organizing Committee (DSOC), one of the DSA's precursor organization, had used the classic fist and rose.