Halcon讀取json文件實現示例

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核心知識:

get_dict_tuple、get_dict_param的理解與應用

一、get_dict_ttuple算子

①定義

get_dict_tuple( DictHandle, Key ， Tuple)

DictHandle：字典句柄

key:鍵

tuple:根據Key在句柄下取內容，存放到tuple中

②功能:從字典中檢索與鍵關聯的元組

二、get_dict_param算子

①定義

get_dict_param( DictHandle, GenParamName, Key ,GenParamValue)

DictHandle：字典句柄

GenParamName:根據參數在字典中查詢相關信息。當填寫’keys’時，默認取所有元素

key：鍵。可以不填內容，直接寫 []

GenParamValue:讀取的內容存放

②功能:查詢字典參數或有關字典的信息。

三、實踐（直接上代碼）

有些原理我也不是特別清楚，但通過實踐幾次之後，略有所感。所有，實踐是檢驗真理的唯一標準，多動手。

 ************以下是我json文件內容***************
*    {"path":"C:\\Users\\Administrator\\Desktop\\算子開發任務書\\000001.png",
*    "outputs":{"object":[{"name":"sharp","polygon":{"x1":2613,"y1":418,"x2":2686,"y2":1218,"x3":2722,"y3":2054,"x4":2759,"y4":2372,"x5":2795,"y5":2445,"x6":2759,"y6":3136,"x7":2777,"y7":3136,"x8":2831,"y8":2881,"x9":2904,"y9":4263,"x10":3013,"y10":4263,"x11":3013,"y11":3900,"x12":3086,"y12":3881,"x13":3140,"y13":4263,"x14":3268,"y14":4263,"x15":3086,"y15":2972,"x16":3131,"y16":2900,"x17":3177,"y17":3100,"x18":3231,"y18":3109,"x19":3050,"y19":2154,"x20":3122,"y20":2172,"x21":3013,"y21":1072,"x22":2977,"y22":336,"x23":2868,"y23":309,"x24":2904,"y24":590,"x25":2777,"y25":572,"x26":2722,"y26":372}}]},
*    "time_labeled":1582335060421,
*    "labeled":true,
*    "size":{"width":3798,"height":8748,"depth":3}}
*讀取json文件,將內容放入字典中
read_dict('data.json',[],[],DictJson)
*取字典中所有關鍵字
get_dict_param(DictJson,'keys',[],ALLKeys)
*讀取outputs下的內容
get_dict_tuple(DictJson,'outputs',outputsDict)
*取字典中所有關鍵字
*這一步其實是對outputs內容的讀取，但讀取的內容可能是地址信息
get_dict_param(outputsDict,'keys',[],outputsDictAllKeys)
*根據‘地址'信息將內容讀入到元組中
get_dict_tuple(outputsDict,outputsDictAllKeys,outputsObjectDict)
*讀取元組數據
get_dict_param(outputsObjectDict,'keys',[],outputsObjectDictALLKeys)
*元組中數據數量統計（其中元組中有小元組，而數量是指小元組的數量）
num:=|outputsObjectDictALLKeys|
*遍歷
for keysIndex:=0 to num-1 by 1
    try
        get_dict_tuple(outputsObjectDict,outputsObjectDictALLKeys[keysIndex],objectDict)
        get_dict_param(objectDict,'keys',[],objectDictAllKeys)        
        *標註類型 矩形框還是多邊形
        objectShape:=objectDictAllKeys[1]
        get_dict_tuple (objectDict, objectDictAllKeys[1], objectLabelPosition)
        get_dict_param(objectLabelPosition,'keys',[],objectLabelPositionDictAllKeys)
        *矩形框
        if(objectShape='bndbox')
            get_dict_tuple(objectLabelPosition,objectLabelPositionDictAllKeys[0],xMin)
            get_dict_tuple (objectLabelPosition, objectLabelPositionDictAllKeys[1], yMin)
            get_dict_tuple (objectLabelPosition, objectLabelPositionDictAllKeys[2], xMax)
            get_dict_tuple (objectLabelPosition, objectLabelPositionDictAllKeys[3], yMax) 
            *創建一個矩形
            gen_rectangle1(labelRegion,yMin,xMin,yMax,xMax)
        endif
        *多邊形
        if(objectShape='polygon')
            bufX:=[]
            bufY:=[]
            for keysIndex0:=0 to |objectLabelPositionDictAllKeys|/2-1 by 1
                xAddr:=keysIndex0*2
                yAddr:=xAddr+1
                get_dict_tuple (objectLabelPosition, objectLabelPositionDictAllKeys[xAddr], positionX)
                bufX:=[bufX,positionX]
                get_dict_tuple (objectLabelPosition, objectLabelPositionDictAllKeys[yAddr], positionY)   
                bufY:=[bufY,positionY]
            endfor
            bufX:=[bufX,bufX[0]]
            bufY:=[bufY,bufY[0]]
            *創建多邊形
            gen_region_polygon(labelRegion,bufY,bufX)
            fill_up(labelRegion,labelRegion)
        endif
        *讀取 name 內容，存放到objectName中
        get_dict_tuple(objectDict,objectDictAllKeys[0],objectName)
    catch (Exception)
    endtry
endfor

以上就是Halcon讀取json文件實現示例的詳細內容，更多關於Halcon讀取json文件的資料請關註WalkonNet其它相關文章！

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