pixel

数字图像处理------中值滤波

由 拟墨画扇 提交于 2019-12-26 08:53:28
一 中值滤波概念 中值滤波算法以某像素的领域图像区域中的像素值的排序为基础，将像素领域内灰度的中值代替该像素的值[1]； 如：以3*3的领域为例求中值滤波中像素5的值 图1 1）int pixel[9]中存储像素1，像素2...像素9的值； 2）对数组pixel[9]进行排序操作； 3）像素5的值即为数组pixel[9]的中值pixel[4]。 中值滤波对处理椒盐噪声非常有效。 二 中值滤波代码实现 项目工程： https://github.com/ranjiewwen/Everyday_Practice/tree/master/MedianFilter/MedianFilter/MedianFilter //中值滤波：本算法采用3*3的领域范围 void MyImage::MedianFilterOper() { //0. 准备：获取图片的宽，高和像素信息， int const num = 3 * 3; unsigned char pixel[num] = { 0 }; //保存领域的像素值 int width = m_bmpInfo.biWidth; int height = m_bmpInfo.biHeight; int widthbyte = (width * m_bmpInfo.biBitCount / 8 + 3) / 4 * 4; //保证为4的倍数 //相对于中心点

如何识别高级的验证码

由 假如想象 提交于 2019-12-25 22:41:27
来源：转载 作者：佚名 时间：2008-09-15 09:31:25 分享到： ==Ph4nt0m Security Team== Issue 0x02, Phile #0x09 of 0x0A |=---------------------------------------------------------------------------=| |=-----------------------=[ 如何识别高级的验证码 ]=------------------------=| |=---------------------------------------------------------------------------=| |=---------------------------------------------------------------------------=| |=----------------------=[ By moonblue333 ]=------------------------=| |=-------------------=[ <moonblue333_at_hotmail.com> ]=--------------------=| |=-------------------------------------------

Changing pixels to grayscale using PIL in Python

由 廉价感情. 提交于 2019-12-25 07:55:55
问题 I am trying to convert a RGB picture to grayscale. I do not want to use image.convert('L'). This just shows the original image without changing anything. I have tried putting different numbers in the 'red,green,blue=0,0,0' line which does change the color of the image but it is not what I want. import PIL from PIL import Image def grayscale(picture): res=PIL.Image.new(picture.mode, picture.size) width, height = picture.size for i in range(0, width): for j in range(0, height): red, green, blue

AutoIt - Find duplicate images by content?

由 时光毁灭记忆、已成空白 提交于 2019-12-25 06:44:07
问题 I am looking for a way to find duplicate images using AutoIt. I've looked into PixelSearch and SearchImage but neither do exactly what I need them to do. I am trying to compare 2 images by filename and see if they are the same image (a duplicate). The best way I've thought to do it would be to: 1) Get both image sizes in pixels 2) Use a while loop to get the color of each pixel and store it in an array 3) Check to see if both arrays are equal to each other. Does anybody have any ideas on how

How to change a pixel value in XTK

由 我们两清 提交于 2019-12-25 04:12:14
问题 I would like to know how to change a pixel value for the label map. This is my initial approach. Unfortunately, the changes are not reflected in the canvas. X.volume.prototype.SetPixelLabelMap = function(i, j, k, value){ this._labelmap._IJKVolume[k][j][i] = value; var color = this._labelmap._colortable._map.get(value); var changeRawData = function(rawdata, pos){ for(var n = 0; n < 4; n++){ rawdata[pos + n] = color[n + 1]; } } var dim = this._dimensions; //in Z axis height is j width is i, the

Why when my desktop screen and mobile screen have the same resolution don't they display the same thing?

由 女生的网名这么多〃 提交于 2019-12-25 03:13:37
问题 For example, one my desktop one of my 50px wide button is viewed on my desktop it looks like it occupies about 5% of the screen space as expected. But when viewed on my Android device with the same horizontal resolution it looks like it occupies about 15%. Can anyone explain why this is and what I can do to stop it? 回答1: Different displays have different pixel sizes. You hear this referenced as DPI, or dots-per-inch, which is physically how many pixels there are per inch. In your case, your

Android Draw Circle Pixel by Pixel

由 房东的猫 提交于 2019-12-25 03:06:05
问题 I am trying to draw a circle on my bitmap, pixel by pixel, using this code: for(int j = ((int)x - 20); j < ((int)x + 20); j++){ for(int k = ((int)y - 20); k < ((int)y + 20); k++){ int colorX = bitmap.getPixel((int)j, (int)k); if(Color.red(colorX) == 0 && Color.green(colorX) == 0 && Color.blue(colorX) == 0){ if(Math.sqrt(((j - (( int ) x )) ^ 2 ) + ((k - (( int ) y )) ^ 2) ) <= 20) bitmap.setPixel(j, k, Color.YELLOW); } } } But there is a problem, this is not drawing a circle.. it looks like a

How to set pixels to “Console Windows” by passing “String Pointer” in C?

由 半腔热情 提交于 2019-12-24 19:10:00
问题 I know how to set pixels to "Console Windows" by using "SetPixel()" http://msdn.microsoft.com/en-us/library/windows/desktop/dd145078(v=vs.85).aspx But it wastes a lot of time to call this function and draw every pixels to it. Is there any feasible way to set every pixels by passing string (pointer), and call function one time, but set every pixels? 回答1: Not sure what you mean by "Console Windows" or "String", and what they have to do with SetPixel(). However it is true that modifying bitmaps

Convert from coordinates to pixels

由 旧巷老猫 提交于 2019-12-24 18:25:11
问题 I am implementing a rightclick context menu on my google v3 map and I need to get the pixel x and y to correctly position the menu. I get the lat and the lng, anyone have a nice solution to get the pixel x and y? Best Regards Henkemota 回答1: index=x+(y*height) x = index % width y = index / height 回答2: Correction to the above answer: index=x+(y*width) //(not y*height ... because you're taking one full horizontal line of pixels (e.g. 1280px) and multiplying that by the number of lines (y) down

Counting like values bmp to pixel value C++

由 我怕爱的太早我们不能终老 提交于 2019-12-24 17:53:08
问题 I took a Bitmap image and pulled the R, G, B ints from it for a specified row of pixels. Converted the int to a string so that I could print my 6 specific colors. I couldn't figure out how to do it with int. The Problem I am able to print row 0-184 (corresponding to pixels in that row) out as a sequential data 1234... or color red, red, red, black, black, gray.... However I need to count like/same colors, display the sum of like colors, and reset a counter until that color comes up again then
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