C:将数组转换为RGB图像

In C, I have a 1D array of unsigned chars (ie, between 0 to 255) of length 3*DIM*DIM which represents a DIM*DIM pixel image, where the first 3 pixels are the RGB levels of the first pixel, the second 3 pixels are the RGB levels of the second pixel, etc. I would like to save it as a PNG image. What is the easiest, most lightweight method of doing this conversion?

在C语言中,我有一个一维数组的无符号字符(即0到255之间)的长度3 *的*暗代表着暗淡的*暗像素图像,其中前3像素的RGB水平第一像素,第二个3像素的RGB水平第二像素,等等。我想将其保存为PNG图像。进行这种转换的最简单、最轻量级的方法是什么?

Obviously OpenGL can read and display images of this form (GLUT_RGB), but DIM is larger than the dimensions of my monitor screen, so simply displaying the image and taking a screenshot is not an option.

显然，OpenGL可以读取和显示这个表单的图像(GLUT_RGB)，但是DIM比我的监视器屏幕的尺寸大，所以简单地显示图像并进行屏幕截图不是一个选项。

At the moment, I have been doing the conversion by simply saving the array to a CSV file, loading it in Mathematica, and then exporting it as a PNG, but this is very slow (~8 minutes for a single 7000*7000 pixel image).

目前，我只需要将数组保存到CSV文件中，装入Mathematica中，然后将其导出为PNG格式，就可以进行转换，但这非常缓慢(对于一个7000*7000像素的图像，大约需要8分钟)。

1 个解决方案

#1

There are many excellent third party libraries you can use to convert an array of pixel-data to a picture.

有许多优秀的第三方库可以用来将像素数据数组转换为图片。

libPNG is a long standing standard library for png images.
libPNG是一种用于png图像的长期标准库。
LodePNG also seems like a good candidate.
LodePNG看起来也不错。
Finally, ImageMagick is a great library that supports many different image formats.
最后，ImageMagick是一个很好的库，它支持许多不同的图像格式。

All these support C, and are relatively easy to use.

所有这些支持C，并且相对容易使用。

#1