使用RLE读取和压缩图片 [英] Reading and Compressing a picture with RLE

问题描述

目前，我正在学习python，我想进一步了解Data Compression.因此，我决定尝试对运行长度编码(RLE)进行编码.

Currently I am learning python and I'd like to get a little bit more into Data Compression. So I decided to try to code Run-Length Encoding(RLE).

根据我的阅读，当您尝试压缩图片时，它会很有用.

From what I've read it can be useful when you try to compress pictures.

我想知道对于初学者来说最简单的图像文件类型是什么?如何使用python从图片中读取像素RGB值或类似值?

I would like to know what would be the easiest image-file-type for a beginner? How can I read out pixel RGB values or similar from a picture with python?

推荐答案

对于您问题的第二部分:我强烈建议

As for the second part of your question: I would highly recommend OpenCV. It is very power for image processing and analysis. A very basic example of getting the pixel values of an image in Python using OpenCV:

import cv2

image = cv2.imread("some_image.jpg")
image[x, y, z]

这将返回 x，y，z 坐标处的像素值.请注意，索引从0开始，因此如果要访问第三个RGB组件，则必须执行 image [x，y，2] ，其中 x 和 y是行和列.

This will return the value of the pixel at x, y, z coordinates. Note that indexing begins at 0 so if you want to access the third RGB component, you have to do image[x, y, 2] where x and y are the line and column.

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