opencv - OPENCV 2.4.9调整大小会更改像素值吗？

Question

我正在处理TIFF图像的分类问题。我正在处理整个图像。但是在最后阶段，我将图像调整为较小的尺寸以快速显示。预计将获得二进制图像，但是调整大小会引入中间值的像素，因此，在预期纯为0或255像素的像素值中会出现几个灰点？

Answer 1

在进行re-sizing时，请使用INTER_NEAREST插值类型来避免这种情况:

interpolation – interpolation method:

• INTER_NEAREST - a nearest-neighbor interpolation
• INTER_LINEAR - a bilinear interpolation (used by default)
• INTER_AREA - resampling using pixel area relation. It may be a preferred method for image decimation, as it gives moire’-free results. But when the image is zoomed, it is similar to the INTER_NEAREST method.
• INTER_CUBIC - a bicubic interpolation over 4x4 pixel neighborhood
• INTER_LANCZOS4 - a Lanczos interpolation over 8x8 pixel neighborhood