switched to UTIF.js form tiff.js

        var arrayBuffer;

        var arrayBuffer;

        var fileReader = new FileReader();

        var fileReader = new FileReader();

        fileReader.onload = function(event){

        fileReader.onload = function(event){

            arrayBuffer = event.target.result;

            arrayBuffer = event.target.result;

            var tiff = new Tiff({buffer: arrayBuffer});

            var canvas = tiff.toCanvas();

            // tiff.js which is limited in capabilities

            //var tiff = new Tiff({buffer: arrayBuffer});

            //var canvas = tiff.toCanvas();

            // UTIF.js

            var ifds = UTIF.decode(arrayBuffer);

            UTIF.decodeImage(arrayBuffer, ifds[0]);

            if (ifds[0].t258==16){

                rgba_16bit = new Float32Array(ifds[0].data.filter((x,i) => i%2==0));

                rgba_16bit = rgba_16bit.map((x,i) => x + (ifds[0].data[2*i+1]<<8));

                /*

                if (ifds[0].height==122){

                    // cut off telemetry

                    ifds[0].height = 120;

                    rgba_16bit = rgba_16bit.slice(0,ifds[0].height*ifds[0].width);

                }

                */

                // convert to C

                rgba_16bit = rgba_16bit.map(x => x/100-273.15);

                // scale

                t_lo = 10;

                t_hi = 30;

                rgba_16bit = rgba_16bit.map(x => (x-t_lo)/(t_hi-t_lo));

                rgba_16bit = rgba_16bit.map(x => 255*x*x);

            }

            var rgba_clamped = new Uint8ClampedArray(rgba_16bit.length*4);

            rgba_clamped = rgba_clamped.map((x,i) => rgba_16bit[(i-i%4)/4]);

            rgba_clamped = rgba_clamped.map((x,i) => (i%4==3)?255:x);

            var rgba_idata   = new ImageData(rgba_clamped,ifds[0].width,ifds[0].height);

            var canvas = cnv_working[0];

            canvas.width = ifds[0].width;

            canvas.height = ifds[0].height;

            var ctx = canvas.getContext('2d');

            ctx.putImageData(rgba_idata, 0, 0);

            cnv_working.trigger("canvas_ready");

            cnv_working.trigger("canvas_ready");

            obj.busy = false;

            obj.busy = false;

            Elphel.Canvas.drawScaled($(canvas),cnv_display,settings.width);

            //Elphel.Canvas.drawScaled($(canvas),cnv_display,settings.width);

            Elphel.Canvas.drawScaled(cnv_working,cnv_display,settings.width);

        }

        }

        fileReader.readAsArrayBuffer(blob);

        fileReader.readAsArrayBuffer(blob);