调用Win自带的API来实现离线OCR，但是自带的API识别效果很拉胯。示例仅供参考
附带截图放大的示例整合包：【放大截图后，识别率稍微好点】
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免类库的调用示例：
; 来源出处：https://www.autohotkey.com/boards/viewtopic.php?f=6&t=72674
#NoEnv
SetBatchLines, -1
Return
Esc:: ExitApp
F1::
hBitmap := HBitmapFromScreen(GetArea()*)
pIRandomAccessStream := HBitmapToRandomAccessStream(hBitmap)
DllCall("DeleteObject", "Ptr", hBitmap)
text := ocr(pIRandomAccessStream, "zh-Hans-CN")
MsgBox % text
Return
GetArea() {
area := []
StartSelection(area)
while !area.w
Sleep, 100
Return area
}
StartSelection(area) {
handler := Func("Select").Bind(area)
Hotkey, LButton, % handler, On
ReplaceSystemCursors("IDC_CROSS")
}
Select(area) {
static hGui := CreateSelectionGui()
Hook := new WindowsHook(WH_MOUSE_LL := 14, "LowLevelMouseProc", hGui)
Loop {
KeyWait, LButton
WinGetPos, X, Y, W, H, ahk_id %hGui%
} until w > 0
ReplaceSystemCursors("")
Hotkey, LButton, Off
Hook := ""
Gui, %hGui%:Show, Hide
for k, v in ["x", "y", "w", "h"]
area[v] := %v%
}
ReplaceSystemCursors(IDC = "")
{
static IMAGE_CURSOR := 2, SPI_SETCURSORS := 0x57
, exitFunc := Func("ReplaceSystemCursors").Bind("")
, SysCursors := { IDC_APPSTARTING: 32650
, IDC_ARROW : 32512
, IDC_CROSS : 32515
, IDC_HAND : 32649
, IDC_HELP : 32651
, IDC_IBEAM : 32513
, IDC_NO : 32648
, IDC_SIZEALL : 32646
, IDC_SIZENESW : 32643
, IDC_SIZENWSE : 32642
, IDC_SIZEWE : 32644
, IDC_SIZENS : 32645
, IDC_UPARROW : 32516
, IDC_WAIT : 32514 }
if !IDC {
DllCall("SystemParametersInfo", UInt, SPI_SETCURSORS, UInt, 0, UInt, 0, UInt, 0)
OnExit(exitFunc, 0)
}
else {
hCursor := DllCall("LoadCursor", Ptr, 0, UInt, SysCursors[IDC], Ptr)
for k, v in SysCursors {
hCopy := DllCall("CopyImage", Ptr, hCursor, UInt, IMAGE_CURSOR, Int, 0, Int, 0, UInt, 0, Ptr)
DllCall("SetSystemCursor", Ptr, hCopy, UInt, v)
}
OnExit(exitFunc)
}
}
CreateSelectionGui() {
Gui, New, +hwndhGui +Alwaysontop -Caption +LastFound +ToolWindow +E0x20 -DPIScale
WinSet, Transparent, 130
Gui, Color, FFC800
Return hGui
}
LowLevelMouseProc(nCode, wParam, lParam) {
static WM_MOUSEMOVE := 0x200, WM_LBUTTONUP := 0x202
, coords := [], startMouseX, startMouseY, hGui
, timer := Func("LowLevelMouseProc").Bind("timer", "", "")
if (nCode = "timer") {
while coords[1] {
point := coords.RemoveAt(1)
mouseX := point[1], mouseY := point[2]
x := startMouseX < mouseX ? startMouseX : mouseX
y := startMouseY < mouseY ? startMouseY : mouseY
w := Abs(mouseX - startMouseX)
h := Abs(mouseY - startMouseY)
try Gui, %hGUi%: Show, x%x% y%y% w%w% h%h% NA
}
}
else {
(!hGui && hGui := A_EventInfo)
if (wParam = WM_LBUTTONUP)
startMouseX := startMouseY := ""
if (wParam = WM_MOUSEMOVE) {
mouseX := NumGet(lParam + 0, "Int")
mouseY := NumGet(lParam + 4, "Int")
if (startMouseX = "") {
startMouseX := mouseX
startMouseY := mouseY
}
coords.Push([mouseX, mouseY])
SetTimer, % timer, -10
}
Return DllCall("CallNextHookEx", Ptr, 0, Int, nCode, UInt, wParam, Ptr, lParam)
}
}
class WindowsHook {
__New(type, callback, eventInfo := "", isGlobal := true) {
this.callbackPtr := RegisterCallback(callback, "Fast", 3, eventInfo)
this.hHook := DllCall("SetWindowsHookEx", "Int", type, "Ptr", this.callbackPtr
, "Ptr", !isGlobal ? 0 : DllCall("GetModuleHandle", "UInt", 0, "Ptr")
, "UInt", isGlobal ? 0 : DllCall("GetCurrentThreadId"), "Ptr")
}
__Delete() {
DllCall("UnhookWindowsHookEx", "Ptr", this.hHook)
DllCall("GlobalFree", "Ptr", this.callBackPtr, "Ptr")
}
}
HBitmapFromScreen(X, Y, W, H) {
HDC := DllCall("GetDC", "Ptr", 0, "UPtr")
HBM := DllCall("CreateCompatibleBitmap", "Ptr", HDC, "Int", W, "Int", H, "UPtr")
PDC := DllCall("CreateCompatibleDC", "Ptr", HDC, "UPtr")
DllCall("SelectObject", "Ptr", PDC, "Ptr", HBM)
DllCall("BitBlt", "Ptr", PDC, "Int", 0, "Int", 0, "Int", W, "Int", H
, "Ptr", HDC, "Int", X, "Int", Y, "UInt", 0x00CC0020)
DllCall("DeleteDC", "Ptr", PDC)
DllCall("ReleaseDC", "Ptr", 0, "Ptr", HDC)
Return HBM
}
HBitmapToRandomAccessStream(hBitmap) {
static IID_IRandomAccessStream := "{905A0FE1-BC53-11DF-8C49-001E4FC686DA}"
, IID_IPicture := "{7BF80980-BF32-101A-8BBB-00AA00300CAB}"
, PICTYPE_BITMAP := 1
, BSOS_DEFAULT := 0
DllCall("Ole32\CreateStreamOnHGlobal", "Ptr", 0, "UInt", true, "PtrP", pIStream, "UInt")
VarSetCapacity(PICTDESC, sz := 8 + A_PtrSize*2, 0)
NumPut(sz, PICTDESC)
NumPut(PICTYPE_BITMAP, PICTDESC, 4)
NumPut(hBitmap, PICTDESC, 8)
riid := CLSIDFromString(IID_IPicture, GUID1)
DllCall("OleAut32\OleCreatePictureIndirect", "Ptr", &PICTDESC, "Ptr", riid, "UInt", false, "PtrP", pIPicture, "UInt")
; IPicture::SaveAsFile
DllCall(NumGet(NumGet(pIPicture+0) + A_PtrSize*15), "Ptr", pIPicture, "Ptr", pIStream, "UInt", true, "UIntP", size, "UInt")
riid := CLSIDFromString(IID_IRandomAccessStream, GUID2)
DllCall("ShCore\CreateRandomAccessStreamOverStream", "Ptr", pIStream, "UInt", BSOS_DEFAULT, "Ptr", riid, "PtrP", pIRandomAccessStream, "UInt")
ObjRelease(pIPicture)
ObjRelease(pIStream)
Return pIRandomAccessStream
}
CLSIDFromString(IID, ByRef CLSID) {
VarSetCapacity(CLSID, 16, 0)
if res := DllCall("ole32\CLSIDFromString", "WStr", IID, "Ptr", &CLSID, "UInt")
throw Exception("CLSIDFromString failed. Error: " . Format("{:#x}", res))
Return &CLSID
}
; =================== 使用 UWP API 的光学字符识别 (OCR) ===================
ocr(file, lang := "FirstFromAvailableLanguages")
{
static OcrEngineStatics, OcrEngine, MaxDimension, LanguageFactory, Language, CurrentLanguage, BitmapDecoderStatics, GlobalizationPreferencesStatics
if (OcrEngineStatics = "")
{
CreateClass("Windows.Globalization.Language", ILanguageFactory := "{9B0252AC-0C27-44F8-B792-9793FB66C63E}", LanguageFactory)
CreateClass("Windows.Graphics.Imaging.BitmapDecoder", IBitmapDecoderStatics := "{438CCB26-BCEF-4E95-BAD6-23A822E58D01}", BitmapDecoderStatics)
CreateClass("Windows.Media.Ocr.OcrEngine", IOcrEngineStatics := "{5BFFA85A-3384-3540-9940-699120D428A8}", OcrEngineStatics)
DllCall(NumGet(NumGet(OcrEngineStatics+0)+6*A_PtrSize), "ptr", OcrEngineStatics, "uint*", MaxDimension) ; MaxImageDimension
}
if (file = "ShowAvailableLanguages")
{
if (GlobalizationPreferencesStatics = "")
CreateClass("Windows.System.UserProfile.GlobalizationPreferences", IGlobalizationPreferencesStatics := "{01BF4326-ED37-4E96-B0E9-C1340D1EA158}", GlobalizationPreferencesStatics)
DllCall(NumGet(NumGet(GlobalizationPreferencesStatics+0)+9*A_PtrSize), "ptr", GlobalizationPreferencesStatics, "ptr*", LanguageList) ; get_Languages
DllCall(NumGet(NumGet(LanguageList+0)+7*A_PtrSize), "ptr", LanguageList, "int*", count) ; count
loop % count
{
DllCall(NumGet(NumGet(LanguageList+0)+6*A_PtrSize), "ptr", LanguageList, "int", A_Index-1, "ptr*", hString) ; get_Item
DllCall(NumGet(NumGet(LanguageFactory+0)+6*A_PtrSize), "ptr", LanguageFactory, "ptr", hString, "ptr*", LanguageTest) ; CreateLanguage
DllCall(NumGet(NumGet(OcrEngineStatics+0)+8*A_PtrSize), "ptr", OcrEngineStatics, "ptr", LanguageTest, "int*", bool) ; IsLanguageSupported
if (bool = 1)
{
DllCall(NumGet(NumGet(LanguageTest+0)+6*A_PtrSize), "ptr", LanguageTest, "ptr*", hText)
buffer := DllCall("Combase.dll\WindowsGetStringRawBuffer", "ptr", hText, "uint*", length, "ptr")
text .= StrGet(buffer, "UTF-16") "`n"
}
ObjRelease(LanguageTest)
}
ObjRelease(LanguageList)
return text
}
if (lang != CurrentLanguage) or (lang = "FirstFromAvailableLanguages")
{
if (OcrEngine != "")
{
ObjRelease(OcrEngine)
if (CurrentLanguage != "FirstFromAvailableLanguages")
ObjRelease(Language)
}
if (lang = "FirstFromAvailableLanguages")
DllCall(NumGet(NumGet(OcrEngineStatics+0)+10*A_PtrSize), "ptr", OcrEngineStatics, "ptr*", OcrEngine) ; TryCreateFromUserProfileLanguages
else
{
CreateHString(lang, hString)
DllCall(NumGet(NumGet(LanguageFactory+0)+6*A_PtrSize), "ptr", LanguageFactory, "ptr", hString, "ptr*", Language) ; CreateLanguage
DeleteHString(hString)
DllCall(NumGet(NumGet(OcrEngineStatics+0)+9*A_PtrSize), "ptr", OcrEngineStatics, ptr, Language, "ptr*", OcrEngine) ; TryCreateFromLanguage
}
if (OcrEngine = 0)
{
msgbox Can not use language "%lang%" for OCR, please install language pack.
ExitApp
}
CurrentLanguage := lang
}
IRandomAccessStream := file
DllCall(NumGet(NumGet(BitmapDecoderStatics+0)+14*A_PtrSize), "ptr", BitmapDecoderStatics, "ptr", IRandomAccessStream, "ptr*", BitmapDecoder) ; CreateAsync
WaitForAsync(BitmapDecoder)
BitmapFrame := ComObjQuery(BitmapDecoder, IBitmapFrame := "{72A49A1C-8081-438D-91BC-94ECFC8185C6}")
DllCall(NumGet(NumGet(BitmapFrame+0)+12*A_PtrSize), "ptr", BitmapFrame, "uint*", width) ; get_PixelWidth
DllCall(NumGet(NumGet(BitmapFrame+0)+13*A_PtrSize), "ptr", BitmapFrame, "uint*", height) ; get_PixelHeight
if (width > MaxDimension) or (height > MaxDimension)
{
msgbox Image is to big - %width%x%height%.`nIt should be maximum - %MaxDimension% pixels
ExitApp
}
BitmapFrameWithSoftwareBitmap := ComObjQuery(BitmapDecoder, IBitmapFrameWithSoftwareBitmap := "{FE287C9A-420C-4963-87AD-691436E08383}")
DllCall(NumGet(NumGet(BitmapFrameWithSoftwareBitmap+0)+6*A_PtrSize), "ptr", BitmapFrameWithSoftwareBitmap, "ptr*", SoftwareBitmap) ; GetSoftwareBitmapAsync
WaitForAsync(SoftwareBitmap)
DllCall(NumGet(NumGet(OcrEngine+0)+6*A_PtrSize), "ptr", OcrEngine, ptr, SoftwareBitmap, "ptr*", OcrResult) ; RecognizeAsync
WaitForAsync(OcrResult)
DllCall(NumGet(NumGet(OcrResult+0)+6*A_PtrSize), "ptr", OcrResult, "ptr*", LinesList) ; get_Lines
DllCall(NumGet(NumGet(LinesList+0)+7*A_PtrSize), "ptr", LinesList, "int*", count) ; count
loop % count
{
DllCall(NumGet(NumGet(LinesList+0)+6*A_PtrSize), "ptr", LinesList, "int", A_Index-1, "ptr*", OcrLine)
DllCall(NumGet(NumGet(OcrLine+0)+7*A_PtrSize), "ptr", OcrLine, "ptr*", hText)
buffer := DllCall("Combase.dll\WindowsGetStringRawBuffer", "ptr", hText, "uint*", length, "ptr")
text .= StrGet(buffer, "UTF-16") "`n"
ObjRelease(OcrLine)
}
Close := ComObjQuery(IRandomAccessStream, IClosable := "{30D5A829-7FA4-4026-83BB-D75BAE4EA99E}")
DllCall(NumGet(NumGet(Close+0)+6*A_PtrSize), "ptr", Close) ; Close
ObjRelease(Close)
Close := ComObjQuery(SoftwareBitmap, IClosable := "{30D5A829-7FA4-4026-83BB-D75BAE4EA99E}")
DllCall(NumGet(NumGet(Close+0)+6*A_PtrSize), "ptr", Close) ; Close
ObjRelease(Close)
ObjRelease(IRandomAccessStream)
ObjRelease(BitmapDecoder)
ObjRelease(BitmapFrame)
ObjRelease(BitmapFrameWithSoftwareBitmap)
ObjRelease(SoftwareBitmap)
ObjRelease(OcrResult)
ObjRelease(LinesList)
return text
}
CreateClass(string, interface, ByRef Class)
{
CreateHString(string, hString)
VarSetCapacity(GUID, 16)
DllCall("ole32\CLSIDFromString", "wstr", interface, "ptr", &GUID)
result := DllCall("Combase.dll\RoGetActivationFactory", "ptr", hString, "ptr", &GUID, "ptr*", Class)
if (result != 0)
{
if (result = 0x80004002)
msgbox No such interface supported
else if (result = 0x80040154)
msgbox Class not registered
else
msgbox error: %result%
ExitApp
}
DeleteHString(hString)
}
CreateHString(string, ByRef hString)
{
DllCall("Combase.dll\WindowsCreateString", "wstr", string, "uint", StrLen(string), "ptr*", hString)
}
DeleteHString(hString)
{
DllCall("Combase.dll\WindowsDeleteString", "ptr", hString)
}
WaitForAsync(ByRef Object)
{
AsyncInfo := ComObjQuery(Object, IAsyncInfo := "{00000036-0000-0000-C000-000000000046}")
loop
{
DllCall(NumGet(NumGet(AsyncInfo+0)+7*A_PtrSize), "ptr", AsyncInfo, "uint*", status) ; IAsyncInfo.Status
if (status != 0)
{
if (status != 1)
{
DllCall(NumGet(NumGet(AsyncInfo+0)+8*A_PtrSize), "ptr", AsyncInfo, "uint*", ErrorCode) ; IAsyncInfo.ErrorCode
msgbox AsyncInfo status error: %ErrorCode%
ExitApp
}
ObjRelease(AsyncInfo)
break
}
sleep 10
}
DllCall(NumGet(NumGet(Object+0)+8*A_PtrSize), "ptr", Object, "ptr*", ObjectResult) ; GetResults
ObjRelease(Object)
Object := ObjectResult
}
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