Loading 16 Bits GrayScale Image by Malloc C++ Fail

Question

How can I load RAW 16-bit grayscale image with Fread?

I have unsigned char* buffer with raw data. I know its dimensions in pixels which are INPUT_DIM_X / INPUT_DIM_Y and Num_Proj means numbers of input image. Here is my code.

I'm trying to load it with

    camera_mem = (unsigned short*)malloc(Num_Projs * INPUT_DIM_X * INPUT_DIM_Y * sizeof(unsigned short)); 
camera_data = (unsigned short***)malloc(Num_Projs * sizeof(unsigned short**));
for(int i = 0; i < Num_Projs; i++){
    camera_data[i] = (unsigned short**)malloc(INPUT_DIM_Y * sizeof(unsigned short *));
}   
for(int i = 0; i < Num_Projs; i++){
    for(int j = 0; j < INPUT_DIM_Y; j++){
        camera_data[i][j] = &camera_mem[i * INPUT_DIM_X  * INPUT_DIM_Y + j * INPUT_DIM_X];
    }
}
for(img_num = 1; img_num <= Num_Projs; img_num++){
    strcpy(currentfile, filepath);
    sprintf(scannumbuf, "%d", img_num);
    strcat(currentfile, scannumbuf);
    strcat(currentfile,".raw");
    in_file = fopen(currentfile, "rb");
    
    if(in_file==nullptr){
        perror("No Files/File Error");
    }

    base = img_num - start;
    size_t result = fread(camera_data[base][0], sizeof(unsigned short), INPUT_DIM_X * INPUT_DIM_Y, in_file);

But I had it like

Could someone advice me which step of malloc would be appreciated.