diff --git a/src/core/config/scripts/generateConfig.mjs b/src/core/config/scripts/generateConfig.mjs
index 492a000c..5f1805f1 100644
--- a/src/core/config/scripts/generateConfig.mjs
+++ b/src/core/config/scripts/generateConfig.mjs
@@ -53,6 +53,10 @@ for (const opObj in Ops) {
         if ("inRegexes" in op.checks) {
             operationConfig[op.name].inputRegexes = op.checks.inRegexes;
         }
+
+        if ("mimeCheck" in op.checks) {
+            operationConfig[op.name].mimeCheck = op.checks.mimeCheck;
+        }
     }
 
     if (!(op.module in modules))
diff --git a/src/core/lib/Magic.mjs b/src/core/lib/Magic.mjs
index ebb6b461..c4b7574a 100644
--- a/src/core/lib/Magic.mjs
+++ b/src/core/lib/Magic.mjs
@@ -5,6 +5,7 @@ import Dish from "../Dish.mjs";
 import {detectFileType} from "./FileType.mjs";
 import chiSquared from "chi-squared";
 import potentialOps from "./Test.mjs";
+import { isImage } from "./FileType.mjs";
 
 /**
  * A class for detecting encodings, file types and byte frequencies and
@@ -244,6 +245,23 @@ class Magic {
         return results;
     }
 
+    /**
+     * Checks the mime value of the data compared to the specified type.
+     *
+     * @param {ArrayBuffer} data
+     * @param {string} type
+     * @returns {boolean}
+     */
+    async checkMime (data, type) {
+        switch (type) {
+            case "Image":
+                if (isImage(data))
+                    return false;
+                break;
+        }
+        return true;
+    }
+
     /**
      * Uses the checks to validate the input/output of potential operations.
      *
@@ -276,6 +294,11 @@ class Magic {
                 return;
             }
 
+            const mime = OperationConfig[op.op].mimeCheck;
+            if (mime)
+                if (await this.checkMime(output, mime.type))
+                    return;
+
             // If the recipe returned an empty buffer, do not continue
             if (_buffersEqual(output, new ArrayBuffer())) {
                 return;
diff --git a/src/core/lib/MagicObject.mjs b/src/core/lib/MagicObject.mjs
index 587f29c3..c4b28cd6 100644
--- a/src/core/lib/MagicObject.mjs
+++ b/src/core/lib/MagicObject.mjs
@@ -5,10 +5,12 @@ class magicObject {
     /**
      * @param inRegexes
      * @param outRegexes
+     * @param mimeCheck
      */
-    constructor (inRegexes = null, outRegexes = null) {
+    constructor (inRegexes = null, outRegexes = null, mimeCheck = null) {
         this.inRegexes = inRegexes;
         this.outRegexes = outRegexes;
+        this.mimeCheck = mimeCheck;
     }
 
 } export default magicObject;
diff --git a/src/core/operations/ObjectIdentifierToHex.mjs b/src/core/operations/ObjectIdentifierToHex.mjs
index f372dd98..0faf72e2 100644
--- a/src/core/operations/ObjectIdentifierToHex.mjs
+++ b/src/core/operations/ObjectIdentifierToHex.mjs
@@ -28,7 +28,7 @@ class ObjectIdentifierToHex extends Operation {
         this.args = [];
         this.checks = new magicObject([
             {
-                match:  "^\\s*([0-9]{1,3}\\.?)+\\s*$",
+                match:  "^\\s*([0-9]{1,3}\\.)+[0-9]{1,3}\\s*$",
                 flags:  "",
                 magic:  true,
                 args:   []
diff --git a/src/core/operations/RenderImage.mjs b/src/core/operations/RenderImage.mjs
index 4d6d30e4..106a8185 100644
--- a/src/core/operations/RenderImage.mjs
+++ b/src/core/operations/RenderImage.mjs
@@ -44,7 +44,12 @@ class RenderImage extends Operation {
                 args: ["Raw"],
                 useful: true
             }
-        ]);
+        ],
+        null,
+        {
+            type: "Image",
+        }
+        );
     }
 
     /**