如何无损放大二进制图像？

发布于 2025-01-25 05:50:28 字数 1235 浏览 2 评论 0原文

我正在用Python创建一个随机的步行模拟。我想创建一个很酷的视频，该视频开始非常放大，然后放大以显示所有粒子。但是，我似乎无法获得图像的高分辨率。我尝试了所有cv22.列出列出的插值参数在这里和不工作。您可以这样重新创建全尺寸框架：

frame = np.random.choice((0, 255), size=(1080, 1920))

我如何密切地放大，仍然将单个粒子视为白色正方形而不会丢失分辨率？

注1：我拥有所有的框架本身信息（即我没有从视频或类似视频中读取框架）。

注2：我正在缩放中心周围的图像阵列并调整大小，如：

def get_zoomed(frame, h_perc: float, w_perc: float):
    """given a frame and height and width percentage, return a zoomed in frame"""
    h, w = frame.shape
    h_sub = int(h * h_perc / 2)  # height of zoomed in crop
    w_sub = int(w * w_perc / 2)  # width of zoomed in crop
    center_h, center_w = (h // 2, w // 2)
    frame_crop = frame[center_h - h_sub: center_h +
                      h_sub, center_w - w_sub: center_w + w_sub]  # cropped frame
    return cv2.resize(frame_crop, (w, h), cv2.INTER_LINEAR_EXACT)

编辑：注：注：这是Inter_neart的示例图像输出

原文

I am creating a random walk simulation with a million particles in python. I want to create a cool video which starts very zoomed in, then zooms out to show all the particles. However, I can't seem to get a high-res zoomed in image. I tried all cv2.resize interpolation arguments listed here and non worked.
You can re-create the full-size frame as such:

frame = np.random.choice((0, 255), size=(1080, 1920))

How can I zoom in very closely and still see individual particles as white squares without loosing resolution?

Note 1: I have the frame itself with all the information (i.e. I am not reading the frame from a video or something like that).

Note 2: I am zooming in by cropping the image array around the center and resizing it, as such:

def get_zoomed(frame, h_perc: float, w_perc: float):
    """given a frame and height and width percentage, return a zoomed in frame"""
    h, w = frame.shape
    h_sub = int(h * h_perc / 2)  # height of zoomed in crop
    w_sub = int(w * w_perc / 2)  # width of zoomed in crop
    center_h, center_w = (h // 2, w // 2)
    frame_crop = frame[center_h - h_sub: center_h +
                      h_sub, center_w - w_sub: center_w + w_sub]  # cropped frame
    return cv2.resize(frame_crop, (w, h), cv2.INTER_LINEAR_EXACT)

EDIT: Note 3: Here is a sample image output from INTER_NEAREST