灰度图像的 BMP 格式是什么? [英] What is the BMP format for Gray scale Images?

问题描述

灰度图像的 BMP 格式是什么(尤其是每像素 16 位)?维基百科只讨论了 bmp 的彩色图像.

What is the BMP format for Gray scale Images (especially for 16 bit per pixel) ? The wikipedia just talks about colour images for bmp.

更新:

只是为了给未来的访问者提供更新和信息，我要去PGM因为这是未压缩的并且可以支持 16 位灰度.另一种选择是使用 PNG，但它会压缩数据(这不是我想要的)正如此处所讨论的那样.另请注意，图像可能会失真，因为大多数显示器支持 256 色，而不支持 16 位的 4096 色.所以图像会饱和.

Just for an update and information for future visitors, I am going for PGM as this is uncompressed and can support 16 bit gray-scale. Another option was to use PNG, but it compresses the data (which is not what I want) as discussed here . Also note that the image may appear distorted, since most of the monitors support 256 colors and not 4096 for 16 bit. So the Image will be saturated.

令人惊讶的是，BMP 在 16 位图像灰度的情况下几乎无能为力.
感谢帮助我理解问题的人.

It was though surprising to know that BMP is almost helpless in case of Gray-scale for 16 bit images.
Thanks for people who helped me understand the issue.

推荐答案

对于灰度图像，我会使用 8 位 BMP.8 位 BMP 可以使用调色板对颜色进行编码.但是，如果您不使用，您可以简单地将颜色值 [0...255] 解释为从黑色 (0) 到白色 (255) 的颜色.

For grayscale images, I would use 8-bit BMP. 8 bit BMPs can encode colors with palette. However, if you don't use one, you can simply interpret color values [0...255] as colors from black (0) to white (255).

我不会将 BMP 用于 16 位灰度图像.从技术上讲，您可以使用每像素 16 位 BMP 格式来编码 16 位灰度数据(http://en.wikipedia.org/wiki/BMP_file_format#Pixel_format).然而，实际上这是一个坏主意(阅读:hacky)，因为该深度旨在对像素的 alpha、红色、绿色和蓝色样本进行编码.

I wouldn't use BMP for 16-bit grayscale images. Technically, you could use 16-bits per pixel BMP format for encoding 16-bit grayscale data (http://en.wikipedia.org/wiki/BMP_file_format#Pixel_format). However in practice this is a bad idea (read: hacky) since that depth is designed to encode alpha, red, green and blue samples of the pixels.

用于存储每像素 16 位灰度数据的更好格式是 PNG.

A better format for storing 16-bit per pixel grayscale data is PNG.

还要问问自己，你真的、真的需要那种超高精度吗?对于大多数应用程序，每像素 8 位就可以了(=如果您对精度没有任何特定要求，那就是这种情况).

Also ask yourself, do you really, really need that extra-precision? For most applications, 8 bits per pixel is just fine (=if you don't have any specific requirements on precision, this would be the case).

这篇关于灰度图像的 BMP 格式是什么?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！