calcHist(&channels[i], 1, 0, Mat(), hist_before[i], 1, &256, 0);其中‘&256’报错
时间: 2024-05-22 19:15:43 浏览: 50
hist_eq.zip_adi dsp_bf5_hist eq_直方图 汇编
The function calcHist is used to calculate the histogram of an image. It takes as input the image, the number of channels, the mask (optional), the size of the histogram, the range of values for each channel, and a flag that indicates whether the histogram should be normalized or not.
The histogram is a representation of the distribution of pixel values in an image. It is often used for image processing tasks such as image segmentation, object detection, and image enhancement. By analyzing the histogram, we can determine the brightness, contrast, and color distribution of an image.
The calcHist function works by counting the number of pixels in the image that fall into each histogram bin. The bins are defined by the size and range of the histogram. For example, if we want to create a 256-bin histogram for an 8-bit grayscale image, the range would be 0 to 255, and each bin would represent a range of 1 pixel value.
The function returns the calculated histogram as a numpy array. The histogram can be visualized using plotting functions such as matplotlib.
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