Export image saved as Varbinary in different formats

Question

I have some images in the SQL Server 2017 database that were recorded as varbinary. I already have a script that exports as . jpg, but I found that some images are actually . png or . bmp.

Is there any way to validate in which format the image was saved before exporting?

Follow the function I created:

CREATE OR ALTER FUNCTION EXPORTAIMAGEM(@IDIMAGEM uniqueidentifier)
RETURNS NVARCHAR(MAX)
as
BEGIN
EXEC master.dbo.xp_cmdshell 'md c:\EXPORTA';
DECLARE @pctStr INT
DECLARE @image VARBINARY(MAX)
DECLARE @MENSAGEM NVARCHAR(MAX)
SET @image= (SELECT DATA FROM Document
              WHERE ID=@IDIMAGEM)
DECLARE @filePath NVARCHAR(MAX)
SET @filePath = 'C:\EXPORTA\Imagem_'+ CONVERT(nvarchar(MAX),@IDIMAGEM) +'.jpg'
EXEC sp_OACreate 'ADODB.Stream', @pctStr OUTPUT
EXEC sp_OASetProperty @pctStr, 'Type', 1
EXEC sp_OAMethod @pctStr, 'Open'
EXEC sp_OAMethod @pctStr,  'Write', NULL, @image
EXEC sp_OAMethod @pctStr, 'SaveToFile', NULL,@filePath, 2
EXEC sp_OAMethod @pctStr, 'Close'
EXEC sp_OADestroy @pctStr
SET @MENSAGEM=(SELECT CASE WHEN @IMAGE IS NULL THEN 'Imagem_'+  CONVERT(nvarchar(MAX),@IDIMAGEM) +' ERRO! VERIFIQUE SE A IMAGEM EXISTE CADASTRADA NO BANCO DE DADOS!'
    ELSE CONVERT(nvarchar(MAX),@IDIMAGEM)+' SUCESSO!'
    END)
    RETURN @MENSAGEM
END