Tag:Pixel point

  • Opencv image corrosion and image expansion

    Time:2021-10-13

    Image corrosion 1. Morphological transformation is mainly aimed at binary images2. Two input objectsObject 1: binary imageObject 2: convolution kernel3. The central point of convolution kernel scans the original image pixel by pixel4. For the pixel points in the scanned original image, the value is 1 only when the element values corresponding to the convolution […]

  • Threshold segmentation and threshold implementation

    Time:2021-9-18

    Binary thresholding First, select a specific threshold value, such as 127The new threshold generation rule is:The gray value of pixels greater than or equal to 127 is set to the maximum value (for example, the maximum 8-bit gray value is 255)The gray value of pixels with gray value less than 127 is set to 0 […]

  • Solve the problem of fuzzy canvas drawing

    Time:2021-9-14

    Canvas painting often finds that he is fuzzy. There are two main ways to solve this problem. Change the pixels rendered by canvas Situation: the line drawn with 1 pixel looks blurred, as if it is wider.Solution var ctx = canvas.getContext(‘2d’); ctx.translate(0.5, 0.5); Principle: we all know that the smallest unit of the screen is […]

  • [pytoch practice] use CNN image classification

    Time:2021-8-21

    [pytoch practice] use CNN image classification demand In 4 * 4 pictures, compare the number of black pixels on the periphery and the number of black pixels on the inner circle to classify the pictures As shown in the figure above, 5 black pixels on the periphery of the picture are larger than 1 black […]