imadjust

Adjust image intensity values.

📝Syntax

J = imadjust(I)
J = imadjust(I, in)
J = imadjust(I, in, out)
J = imadjust(I, in, out, gamma)

📥Input Arguments

Parameter	Description
I	Input grayscale image, RGB image, or double colormap.
in	Input intensity limits, as a 2-by-1 vector or 2-by-N per-channel matrix.
out	Output intensity limits, as a 2-by-1 vector or 2-by-N per-channel matrix.
gamma	Gamma correction scalar or per-channel vector.

📤Output Arguments

Parameter	Description
J	Adjusted image or colormap.

📄Description

Adjust image intensity values. Grayscale images use 2-by-1 limits; RGB images can use 2-by-3 limits and per-channel gamma values.

💡Examples

Adjust contrast of a low-contrast grayscale image

I=uint8([50 80 120; 90 130 170; 140 180 220]);
J=imadjust(I,[0.2;0.8],[]);
figure; subplot(1,2,1); imagesc(I); g=linspace(0,1,64)'; colormap([g g g]); title('Input');
subplot(1,2,2); imagesc(J); g=linspace(0,1,64)'; colormap([g g g]); title('Adjusted');

🔗See Also

stretchlim imhist imcomplement

🕔Version History

Version	Description
2.0.0	initial version

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