[英]Stb Image not loading in data correctly
Im using the stb_image.h
library and my goal is to get the rgb data for each of the pixels of a jpg.我使用stb_image.h
库,我的目标是获取 jpg 的每个像素的 rgb 数据。 But when I call the load function, it only gives me a bunch of weird symbols and not actual numbers.但是当我调用负载 function 时,它只给了我一堆奇怪的符号而不是实际数字。 Could this be due to the image or is my code just wrong?这可能是由于图像还是我的代码错了?
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#include <iostream>
#include <string>
using namespace std;
int main()
{
int width, height;
int comp;
const char* filename = "C:/Users/graha/source/repos/AiFirsy/Debug/rainbow.jpg";
unsigned char* data = stbi_load(
filename, &width, &height, &comp, 0);
if (data == nullptr) {
std::cerr << "ERROR: Could not load texture image file '" << filename << "'.\n";
width = height = 0;
}
cout << data[0];
}
Heres the image这是图像
The output stream ( std::cout
in this case) will interpret 'char' types as characters . output stream (在这种情况下为std::cout
)会将'char' 类型解释为 characters 。 If you want to see the numerical values, you can cast the values to an appropriate type.如果要查看数值,可以将值转换为适当的类型。 For example:例如:
unsigned char const value = 'c';
std::cout << value << std::endl;
std::cout << static_cast<unsigned int>(value) << std::endl;
Outputs:输出:
c
99
Also, as an aside, you're accessing data
even if it's null, which I'm guessing isn't what you want.另外,顺便说一句,您正在访问data
,即使它是 null,我猜这不是您想要的。
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