高斯模糊 √

main.py

@@ -1,4 +1,26 @@
 from math import floor
+from tqdm import tqdm
+
+# 输入数据
+img = input("请输入图片路径：")
+new_width = int(input("请输入新宽度(px)："))
+new_height = int(input("请输入新高度(px)："))
+print("模式 0 直接缩放")
+print("模式 1 高斯模糊缩放")
+mode = int(input("请输入模式："))
+# img = 'imgs/bw.bmp'
+# new_width = 512
+# new_height = 512
+# mode = 1
+
+if (mode != 1):
+    mode = 0
+
+# 读入图片
+with open(img, 'rb') as f:
+    imgBytes = f.read()
+    for _ in tqdm(range(len(imgBytes)), "读入文件中"):
+        pass
 
 
 # 十六进制转十进制
@@ -19,18 +41,6 @@ def sizeByte(size, length):
     return b[::-1]
 
 
-# 输入数据
-img = input("请输入图片路径：")
-new_width = int(input("请输入新宽度(px)："))
-new_height = int(input("请输入新高度(px)："))
-# img = 'imgs/24.bmp'
-# new_width = 128
-# new_height = 128
-
-# 读入图片
-with open(img, 'rb') as f:
-    imgBytes = f.read()
-
 # 文件头处理
 # 检验文件头是否为 BM
 if (imgBytes[0] != 66 or imgBytes[1] != 77):
@@ -62,7 +72,7 @@ while (rowLength % 4 != 0):
 # 计算像素点
 i = dataStart
 currentRow = 0
-while (currentRow < height):
+for currentRow in tqdm(range(height), "读入像素点中"):
     currentCol = 0
     while (currentCol < width * (bpp // 8)):
         if (bpp == 32):
@@ -87,7 +97,6 @@ while (currentRow < height):
                 imgBytes[dataStart + currentRow * rowLength + currentCol + 2]
             })
             currentCol += bpp // 8
-    currentRow += 1
 # 读入图片为像素数组完成
 
 # 缩放图片
@@ -99,14 +108,11 @@ for i in range(new_height):
     newpixels.append([])
 
 # 计算新像素
-currentRow = 0
+for currentRow in tqdm(range(new_height), "计算新像素点中"):
-while (currentRow < new_height):
+    for currentCol in range(new_width):
-    currentCol = 0
+        ori_row = floor(currentRow / scale_h)
-    while (currentCol < new_width):
+        ori_col = floor(currentCol // scale_w)
-        newpixels[currentRow].append(pixels[floor(currentRow / scale_h)][floor(
+        newpixels[currentRow].append(pixels[ori_row][ori_col])
-            currentCol // scale_w)])
-        currentCol += 1
-    currentRow += 1
 
 # 处理新文件
 newimgArray = [66, 77]
@@ -150,24 +156,83 @@ newimgArray.extend(sizeByte(new_imageSize, 4))
 # 调色板不做处理
 newimgArray.extend(sizeByte(0, new_headerSize + 14 - len(newimgArray)))
 
-for i in range(len(newpixels)):
+
+def flur(row, col):
+    if (row - 1 < 0):
+        row = new_height + 1
+    if (row + 1 >= new_height):
+        row = 0
+    if (col - 1 < 0):
+        col = new_width + 1
+    if (col + 1 >= new_width):
+        col = 0
+    p = [0.0947416, 0.118318, 0.147761]
+    r = floor(newpixels[row - 1][col - 1]['r'] * p[0] +
+              newpixels[row - 1][col + 1]['r'] * p[0] +
+              newpixels[row + 1][col - 1]['r'] * p[0] +
+              newpixels[row + 1][col + 1]['r'] * p[0] +
+              newpixels[row][col + 1]['r'] * p[1] +
+              newpixels[row][col - 1]['r'] * p[1] +
+              newpixels[row - 1][col]['r'] * p[1] +
+              newpixels[row + 1][col]['r'] * p[1] +
+              newpixels[row][col]['r'] * p[2])
+    g = floor(newpixels[row - 1][col - 1]['g'] * p[0] +
+              newpixels[row - 1][col + 1]['g'] * p[0] +
+              newpixels[row + 1][col - 1]['g'] * p[0] +
+              newpixels[row + 1][col + 1]['g'] * p[0] +
+              newpixels[row][col + 1]['g'] * p[1] +
+              newpixels[row][col - 1]['g'] * p[1] +
+              newpixels[row - 1][col]['g'] * p[1] +
+              newpixels[row + 1][col]['g'] * p[1] +
+              newpixels[row][col]['g'] * p[2])
+    b = floor(newpixels[row - 1][col - 1]['b'] * p[0] +
+              newpixels[row - 1][col + 1]['b'] * p[0] +
+              newpixels[row + 1][col - 1]['b'] * p[0] +
+              newpixels[row + 1][col + 1]['b'] * p[0] +
+              newpixels[row][col + 1]['b'] * p[1] +
+              newpixels[row][col - 1]['b'] * p[1] +
+              newpixels[row - 1][col]['b'] * p[1] +
+              newpixels[row + 1][col]['b'] * p[1] +
+              newpixels[row][col]['b'] * p[2])
+    if (new_bpp // 8 == 3):
+        return [r, g, b]
+    else:
+        a = floor(newpixels[row - 1][col - 1]['a'] * p[0] +
+                  newpixels[row - 1][col + 1]['a'] * p[0] +
+                  newpixels[row + 1][col - 1]['a'] * p[0] +
+                  newpixels[row + 1][col + 1]['a'] * p[0] +
+                  newpixels[row][col + 1]['a'] * p[1] +
+                  newpixels[row][col - 1]['a'] * p[1] +
+                  newpixels[row - 1][col]['a'] * p[1] +
+                  newpixels[row + 1][col]['a'] * p[1] +
+                  newpixels[row][col]['a'] * p[2])
+        return [r, g, b, a]
+
+
+for i in tqdm(range(len(newpixels)), "将像素点格式化中"):
     row = newpixels[i]
     for col in range(len(row)):
-        if (new_bpp // 8 == 3):
+        if (mode == 0):
-            pixel = [
+            if (new_bpp // 8 == 3):
-                newpixels[i][col]['r'], newpixels[i][col]['g'],
+                pixel = [
-                newpixels[i][col]['b']
+                    newpixels[i][col]['r'], newpixels[i][col]['g'],
-            ]
+                    newpixels[i][col]['b']
+                ]
+            else:
+                pixel = [
+                    newpixels[i][col]['r'], newpixels[i][col]['g'],
+                    newpixels[i][col]['b'], newpixels[i][col]['a']
+                ]
+            newimgArray.extend(pixel)
         else:
-            pixel = [
+            newimgArray.extend(flur(i, col))
-                newpixels[i][col]['r'], newpixels[i][col]['g'],
+
-                newpixels[i][col]['b'], newpixels[i][col]['a']
-            ]
-        newimgArray.extend(pixel)
     newimgArray.extend(sizeByte(0, rowLength - len(row) * (new_bpp // 8)))
 
 # 写入新的文件
 newimgBytes = bytes(newimgArray)
 
 with open(img[:-4] + "_new" + img[-4:], 'wb') as f:
-    f.write(newimgBytes)
+    f.write(newimgBytes)
+    for _ in tqdm(range(len(newimgBytes)), "写出图片中"):
+        pass