The Image > Mode > Grayscale command converts the active image into a gray-value image. All of the supplementary image information, e.g., image calibration and drawing objects, will be retained in this conversion.
If the current image is already a gray-value image, a check is shown in front of the command's name.
24-bit true-color image
When you convert a 24-bit true-color image the color information will get lost in the resulting image. The file reduces its size by a third in the process.
For the conversion, the true-color image will first be separated into three individual images. For the separation, the HSV color space will be used, and the image will be divided up into an intensity, saturation, and hue image. The resulting image is conform with the intensity separation image.
Time stacks
In time stacks, all of the frames will be converted. The Image > Mode > Grayscale command is only available when the frames are true-color images.
The result of a conversion carried out with the Image > Mode > Grayscale command will again be a time stack. The frames in the converted time stack are 8-bit gray-value images.
See also
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